Diasonic Technology Co RVM-704M TOUCH SCREEN MONITOR User Manual KS88C0216
Diasonic Technology Co Ltd TOUCH SCREEN MONITOR KS88C0216
Contents
- 1. User Manual
- 2. Users Manual
Users Manual
USER'S MANUAL
S3C2450
16/32-Bit RISC Microprocessor
August 2008
REV 1.11
Confidential Proprietary of Samsung Electronics Co., Ltd
Copyright © 2008 Samsung Electronics, Inc. All Rights Reserved
Important Notice
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S3C2450 16/32-Bit RISC Microprocessor
User's Manual, Revision 1.11
Publication Number: 21.10-S3-C2450- 082008
Copyright © 2008 Samsung Electronics Co.,Ltd.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electric or mechanical, by photocopying, recording, or otherwise, without the prior
written consent of Samsung Electronics.
Samsung Electronics' microcontroller business has been awarded full ISO-14001
certification (BSI Certificate No. FM24653). All semiconductor products are
designed and manufactured in accordance with the highest quality standards and
objectives.
Samsung Electronics Co., Ltd.
San #24 Nongseo-Dong, Giheung-Gu
Yongin-City, Gyeonggi-Do, Korea
C.P.O. Box #37, Suwon 446-711
TEL: (82)-(31)-209-4593
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Home Page: http://www.samsungsemi.com
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E-Mail: mobilesol.cs@samsung.com
NOTIFICATION OF REVISIONS
ORIGINATOR: Samsung Electronics, LSI Development Group, Gi-Heung, South Korea
PRODUCT NAME: S3C2450 RISC Microprocessor
DOCUMENT NAME: S3C2450 User's Manual, Revision 1.11
DOCUMENT NUMBER: 21.10-S3-C2450-082008
EFFECTIVE DATE: August, 2008
DIRECTIONS: Revision 1.11
REVISION HISTORY
Revision No Description of Change Refer to Author(s) Date
0.00 S3C2450X User’s Manual Preliminary
Revision 0.0 release - AP app part. February 27, 2008
0.10 Overview, Syscon, DRAMC, NAND, IOport,
RTC , UART, USB 2.0, 2D, HSSPI, HSMMC,
LCD controller, Camera, ADC & Touch, I2S,
I2S Multi Audio, AC97, PCM, Electrical Data
Updated
- AP app part. April 22, 2008
0.20 Overview, Syscon, MATRIX & EBI & Bus
Priority, SMC, DMC, Nand Flash, IOport, 2D,
TSADC, Electrical Data, Mechanical Data
Updated
- AP app part. June 11, 2008
1.00 USB in SYSCON , MATRIX & EBI, DRAMC,
NAND Flash, Interrupt controller, IO port,
UART, 2D, TSADC, IIS Interface, PCM are
updated.
- AP app part. July 10, 2008
1.10 Idle mode in SYSCON, UART, Camera, IIS,
Electrical Data is updated. - AP app part. August 26, 2008
1.11 Electrical Data is updated. - AP app part. August 27, 2008
REVISION DESCRIPTIONS FOR REVISION 1.11
Chapter
Chapter Name Page Subjects (Major changes comparing with last version)
1. Overview 1-3 UART part is updated.
2. System controller 2-13 Entering into IDLE mode is changed.
2. System controller 2-14 Entering into IDLE mode is changed.
2. System controller 2-20 Entering into IDLE mode is changed.
2. System controller 2-31 Entering into IDLE mode is changed.
15. UART 15-11 UART Clock and PCLK relation is updated.
23. Camera 23-45 MSDMA SOURCE image width description is added.
25. IIS Interface 25-17 Overrun interrupt is corrected to Under-run interrupt
26. IIS Multi Audio Interface 26-17 Overrun interrupt is corrected to Under-run interrupt
29. Electrical Data 29-ALL Electrical spec for SMC/ NFCON/ DRAMC/ USB/ HSMMC/HS-SPI are
changed.
S3C2450X RISC MICROPROCESSOR iii
Table of Contents
Chapter 1 Product Overview
1 Introduction ...............................................................................................................................................1-1
2 Features....................................................................................................................................................1-2
3 Block Diagram...........................................................................................................................................1-5
4 Pin Assignments .......................................................................................................................................1-6
4.1 Signal Descriptions..........................................................................................................................1-24
4.2 S3C2450 Operation Mode Description ...........................................................................................1-31
4.3 S3C2450 Memory MAP and Base Address of Special Registers...................................................1-32
Chapter 2 System Controller
1 Overview ...................................................................................................................................................2-1
2 Feature......................................................................................................................................................2-1
3 Block Diagram...........................................................................................................................................2-2
4 Functional Descriptions.............................................................................................................................2-3
4.1 Reset Management and Types .......................................................................................................2-3
4.2 Hardware Reset...............................................................................................................................2-3
4.3 Watchdog Reset..............................................................................................................................2-4
4.4 Software Reset ................................................................................................................................2-5
4.5 Wakeup Reset.................................................................................................................................2-5
5 Clock Management...................................................................................................................................2-6
5.1 Clock Generation Overview.............................................................................................................2-6
5.2 Clock Source Selection ...................................................................................................................2-6
5.3 PLL (Phase-Locked-Loop) ..............................................................................................................2-8
5.4 Change PLL Settings In Normal Operation.....................................................................................2-8
5.5 System Clock Control......................................................................................................................2-9
5.6 ARM & BUS Clock Divide Ratio ......................................................................................................2-10
5.7 Examples for configuring clock regiter to produce specific frequency of AMBA clocks..................2-11
5.8 ESYSCLK Control ...........................................................................................................................2-12
6 Power Management..................................................................................................................................2-13
6.1 Power Mode State Diagram ............................................................................................................2-13
6.2 Power Saving Modes.......................................................................................................................2-14
6.3 Wake-Up Event ...............................................................................................................................2-19
6.4 Output Port State and STOP and SLEEP Mode .............................................................................2-19
6.5 Power Saving Mode Entering/Exiting Condition..............................................................................2-20
7 Register Descriptions................................................................................................................................2-21
7.1 Address Map ...................................................................................................................................2-21
iv S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 2 System Controller (Continued)
8 Individual Register Descriptions................................................................................................................2-22
8.1 Clock Source Control Registers
(LOCKCON0, LOCKCON1, OSCSET, MPLLCON, and EPLLCON) ..............................................2-22
8.2 Clock Control Register (CLKSRC, CLKDIV, HCLKCON, PCLKCON, and SCLKCON).................2-25
8.3 Power Management Registers (PWRMODE and PWRCFG) .........................................................2-31
8.4 Reset Control Registers (SWRST and RSTCON)...........................................................................2-33
8.5 Control of retention PAD(I/O) when normal mode and wake-up from sleep mode.........................2-34
8.6 System Controller Status Registers (WKUPSTAT and RSTSTAT).................................................2-35
8.7 Bus Configuration Register (BUSPRI0, BUSPRI1, and BUSMISC)................................................2-36
8.8 Information Register 0,1,2,3 ............................................................................................................2-37
8.9 USB PHY Control register (PHYCTRL) ...........................................................................................2-38
8.10 USB PHY Power Control Register (PHYPWR) .............................................................................2-39
8.11 USB Reset Control Register (URSTCON).....................................................................................2-39
8.12 USB Clock Control Register (UCLKCON) .....................................................................................2-40
Chapter 3 Bus Matrix & EBI
1 Overview....................................................................................................................................................3-1
2 Special Function Registers .......................................................................................................................3-2
2.1 Matrix Core 0 Priority Register (Bpriority0)......................................................................................3-2
2.2 Matrix Core 1 Priority Register (Bpriority1)......................................................................................3-2
2.3 EBI Control Register (EBICON).......................................................................................................3-3
Chapter 4 Bus Priorities
1 Overview....................................................................................................................................................4-1
1.1 Bus Priority MAP..............................................................................................................................4-1
S3C2450X RISC MICROPROCESSOR v
Table of Contents (Continued)
Chapter 5 Static Memory Controller (SMC)
1 Overview ...................................................................................................................................................5-1
2 Feature......................................................................................................................................................5-2
3 Block Diagram...........................................................................................................................................5-3
3.1 Asynchronous Read ........................................................................................................................5-4
3.2 Asynchronous Burst Read...............................................................................................................5-6
3.3 Synchronous Read/Synchronous Burst Read................................................................................. 5-7
3.4 Asynchronous Write ........................................................................................................................5-8
3.5 Synchronous Write/ Synchronous Burst Write................................................................................5-10
3.6 Bus Turnaround...............................................................................................................................5-11
4 Special Registers ......................................................................................................................................5-14
4.1 Bank Idle Cycle Control Registers 0-5 ............................................................................................5-14
4.2 Bank Read Wait State Control Registers 0-5..................................................................................5-14
4.3 Bank Write Wait State Control Registers 0-5 ..................................................................................5-15
4.4 Bank Output Enable Assertion Delay Control Registers 0-5...........................................................5-15
4.5 Bank Write Enable Assertion Delay Control Registers 0-5 .............................................................5-16
4.6 Bank Control Registers 0-5 .............................................................................................................5-17
4.7 Bank Onenand Type Selection Register .........................................................................................5-19
4.8 SMC Status Register.......................................................................................................................5-19
4.9 SMC Control Register......................................................................................................................5-20
Chapter 6 Mobile DRAM Controller
1 Overview ...................................................................................................................................................6-1
2 Block Diagram...........................................................................................................................................6-2
3 Mobile DRAM Initialization Sequence.......................................................................................................6-3
3.1 Mobile DRAM(SDRAM or mobile DDR) Initialization Sequence.....................................................6-3
3.2 DDR2 Initialization Sequence..........................................................................................................6-3
3.3 Mobile DRAM Configuration Register .............................................................................................6-8
3.4 Mobile DRAM Control Register .......................................................................................................6-9
3.5 Mobile DRAM Timming Control Register ........................................................................................6-10
3.6 Mobile DRAM (Extended ) Mode RegiSter Set Register.................................................................6-11
3.7 Mobile DRAM Refresh Control Register .........................................................................................6-14
3.8 Mobile DRAM Write Buffer Time out Register.................................................................................6-14
vi S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 7 NAND Flash Controller
1 Overview....................................................................................................................................................7-1
2 Features ....................................................................................................................................................7-1
3 Block Diagram ...........................................................................................................................................7-2
4 Boot Loader Function................................................................................................................................7-2
5 GPC5/6/7 Pin Configuration Table in IROM Boot Mode...........................................................................7-3
6 NAND Flash Memory Timing ....................................................................................................................7-3
7 NAND Flash Access..................................................................................................................................7-4
8 Data Register Configuration......................................................................................................................7-5
9 Steppingstone (8KB in 64KB SRAM)........................................................................................................7-5
10 1bit / 4bit / 8bit ECC (Error Correction Code) .......................................................................................7-5
10.1 ECC Module Features ...................................................................................................................7-5
10.2 1-bit ECC Programming Encoding and Decoding .........................................................................7-7
10.3 4-bit ECC Programming Guide (ENCODING)...............................................................................7-7
10.4 4-bit ECC Programming Guide (DECODING)...............................................................................7-8
10.5 8-bit ECC Programming Guide (ENCODING)...............................................................................7-8
10.6 8-bit ECC Programming Guide (DECODING)...............................................................................7-9
11 Memory Mapping(NAND boot and Other boot).......................................................................................7-10
12 NAND Flash Memory Configuration........................................................................................................7-11
13 NAND Flash Controller Special Registers ..............................................................................................7-12
13.1 NAND Flash Controller Register Map............................................................................................7-12
13.2 Nand Flash Configuration Register ...............................................................................................7-13
13.3 Control Register.............................................................................................................................7-15
13.4 Command Register........................................................................................................................7-17
13.5 Address Register ...........................................................................................................................7-17
13.6 Data Register.................................................................................................................................7-17
13.7 Main Data area ECC Register .......................................................................................................7-18
13.8 Spare area ECC Register..............................................................................................................7-18
13.9 Progrmmable Block Address Register...........................................................................................7-19
13.10 NFCON Status Register ..............................................................................................................7-21
13.11 ECC0/1 Error Status Register......................................................................................................7-22
13.12 Main Data Area ECC0 Status Register .......................................................................................7-24
13.13 Spare Area ECC Status Register ................................................................................................7-25
13.14 4-bit ECC Error Patten Register ..................................................................................................7-25
13.15 ECC 0/1/2 for 8bit ECC Status Register......................................................................................7-26
13.16 8bit ECC Main Data ECC 0/1/2/3 Status Register.......................................................................7-27
13.17 8bit ECC Error Pattern Register ..................................................................................................7-28
S3C2450X RISC MICROPROCESSOR vii
Table of Contents (Continued)
Chapter 8 CF Controller
1 Overview ...................................................................................................................................................8-1
1.1 Features...........................................................................................................................................8-1
1.2 Signal description ............................................................................................................................8-2
1.3 Block Diagram .................................................................................................................................8-3
1.4 Timing Diagram ...............................................................................................................................8-6
1.5 Special Function Registers..............................................................................................................8-8
2 Individual Register Descriptions ...............................................................................................................8-11
2.1 MUX_REG Register ........................................................................................................................8-11
2.2 PCCARD Configuration & Status Register......................................................................................8-12
2.3 PCCARD Interrupt Mask & Source Register...................................................................................8-13
2.4 PCCARD_ATTR Register ...............................................................................................................8-14
2.5 PCCARD_I/O Register ....................................................................................................................8-14
2.6 PCCARD_COMM Register .............................................................................................................8-15
2.7 ATA_CONTROL Register ...............................................................................................................8-16
2.8 ATA_STATUS Register...................................................................................................................8-16
2.9 ATA_COMMAND Register ..............................................................................................................8-17
2.10 ATA_SWRST Register ..................................................................................................................8-18
2.11 ATA_IRQ Register.........................................................................................................................8-18
2.12 ATA_IRQ_MASK Register ............................................................................................................8-19
2.13 ATA_CFG Register........................................................................................................................8-20
2.14 ATA_PIO_TIME Register ..............................................................................................................8-22
2.15 ATA_XFR_NUM Register..............................................................................................................8-22
2.16 ATA_XFR_CNT Register ..............................................................................................................8-22
2.17 ATA_TBUF_START Register........................................................................................................8-23
2.18 ATA_TBUF_SIZE Register............................................................................................................8-23
2.19 ATA_SBUF_START Register........................................................................................................8-24
2.20 ATA_SBUF_SIZE Register ...........................................................................................................8-24
2.21 ATA_CADDR_TBUF Register.......................................................................................................8-25
2.22 ATA_CADDR_SBUF Register.......................................................................................................8-25
2.23 ATA_PIO_DTR Register ...............................................................................................................8-25
2.24 ATA_PIO_FED Register................................................................................................................8-26
2.25 ATA_PIO_SCR Register ...............................................................................................................8-26
2.26 ATA_PIO_LLR Register ................................................................................................................8-26
2.27 ATA_PIO_LMR Register ...............................................................................................................8-27
2.28 ATA_PIO_LMR Register ...............................................................................................................8-27
2.29 ATA_PIO_DVR Register ...............................................................................................................8-27
2.30 ATA_PIO_CSD Register ...............................................................................................................8-28
2.31 ATA_PIO_DAD Register ...............................................................................................................8-28
2.32 ATA_PIO_RDATA Register...........................................................................................................8-28
2.33 BUS_FIFO_STATUS Register ......................................................................................................8-29
2.34 ATA_FIFO_STATUS Register.......................................................................................................8-29
viii S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 9 DMA Controller
1 Overview....................................................................................................................................................9-1
2 DMA Request Sources..............................................................................................................................9-2
3 DMA Operation..........................................................................................................................................9-3
3.1 External DMA Dreq/Dack Protocol ..................................................................................................9-4
3.2 Examples of Possible Cases ...........................................................................................................9-7
4 DMA Special Registers .............................................................................................................................9-8
4.1 DMA Initial Source Register (DISRC)..............................................................................................9-8
4.2 DMA Initial Source Control Register (DISRCC)...............................................................................9-9
4.3 DMA Initial Destination Register (DIDST)........................................................................................9-10
4.4 DMA Initial Destination Control Register (DIDSTC) ........................................................................9-11
4.5 DMA Control Register (DCON)........................................................................................................9-12
4.6 DMA Status Register (DSTAT)........................................................................................................9-14
4.7 DMA Current Source Register (DCSRC).........................................................................................9-15
4.8 Current Destination Register (DCDST) ...........................................................................................9-15
4.9 DMA Mask Trigger Register (DMASKTRIG) ...................................................................................9-16
4.10 DMA Requeset Selection Register (DMAREQSEL)......................................................................9-17
Chapter 10 Interrupt Controller
1 Overview....................................................................................................................................................10-1
1.1 Interrupt Controller Operation..........................................................................................................10-3
1.2 Interrupt Sources .............................................................................................................................10-4
1.3 Interrupt Priority Generating Block...................................................................................................10-6
1.4 Interrupt Priority ...............................................................................................................................10-7
2 Interrupt Controller Special Registers .......................................................................................................10-8
2.1 Source Pending (SRCPND) Register ..............................................................................................10-10
2.2 Interrupt Mode (INTMOD) Register .................................................................................................10-12
2.3 Interrupt Mask (INTMSK) Register ..................................................................................................10-14
2.4 Interrupt Pending (INTPND) Register..............................................................................................10-16
2.5 Interrupt Offset (INTOFFSET) Register...........................................................................................10-18
2.6 Sub Source Pending (SUBSRCPND) Register ...............................................................................10-20
2.7 Interrupt Sub Mask (INTSUBMSK) Register ...................................................................................10-22
2.8 Priority Mode Register (priority_MODE) ..........................................................................................10-24
2.9 Priority Update Register (priority_UPDATE)....................................................................................10-29
S3C2450X RISC MICROPROCESSOR ix
Table of Contents (Continued)
Chapter 11 I/O Ports
1 Overview ...................................................................................................................................................11-1
2 Port Control Descriptions..........................................................................................................................11-9
2.1 Port Configuration Register (GPACON-GPMCON) ........................................................................11-9
2.2 Port Data Register (GPADAT-GPMDAT)........................................................................................11-9
2.3 Port Pull-Up/Down Register (GPBUDP-GPMUDP).........................................................................11-9
2.4 Miscellaneous Control Register.......................................................................................................11-9
2.5 External Interrupt Control Register..................................................................................................11-9
3 I/O Port Control Register...........................................................................................................................11-10
3.1 PORT A Control Registers (GPACON, GPADAT) ..........................................................................11-10
3.2 PORT B Control Registers (GPBCON, GPBDAT, GPBUDP, GPBSEL) ........................................11-12
3.3 PORT C Control Registers (GPCCON, GPCDAT, GPCUDP)........................................................11-14
3.4 PORT D Control Registers (GPDCON, GPDDAT, GPDUDP)........................................................11-16
3.5 PORT E Control Registers (GPECON, GPEDAT, GPEUDP, GPESEL) ........................................11-18
3.6 PORT F Control Registers (GPFCON, GPFDAT, GPFUDP).......................................................... 11-20
3.7 PORT G Control Registers (GPGCON, GPGDAT, GPGUDP) .......................................................11-21
3.8 PORT H Control Registers (GPHCON, GPHDAT, GPHUDP)........................................................11-23
3.9 PORT J Control Registers (GPJCON, GPJDAT, GPJUDP, GPJSEL) ...........................................11-25
3.10 PORT K Control Registers (GPKCON, GPKDAT, GPKUDP)....................................................... 11-27
3.11 PORT L Control Registers (GPLCON, GPLDAT, GPLUDP, GPLSEL) ........................................11-29
3.12 PORT M Control Registers (GPMCON, GPMDAT, GPMUDP) ....................................................11-31
3.13 Miscellaneous Control Register (MISCCR)...................................................................................11-32
3.14 DCLK Control Registers (DCLKCON)...........................................................................................11-34
3.15 EXTINTn (External Interrupt Control Register n) ..........................................................................11-35
3.16 EINTFLTn (External Interrupt Filter Register n) ............................................................................11-40
3.17 EINTMASK (External Interrupt Mask Register)............................................................................. 11-41
3.18 EINTPEND (External Interrupt Pending Register) ........................................................................11-42
3.19 GSTATUSn (General Status Registers)........................................................................................11-43
3.20 DSCn (Drive Strength Control)......................................................................................................11-44
3.21 PDDMCON (Power Down SDRAM Control Register)...................................................................11-48
3.22 PDSMCON (Power Down SRAM Control Register) .....................................................................11-49
4 GPIO Alive & Sleep Part..........................................................................................................................11-51
x S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 12 WatchDog Timer
1 Overview....................................................................................................................................................12-1
1.1 Features...........................................................................................................................................12-1
2 Watchdog Timer Operation .......................................................................................................................12-2
2.1 Block Diagram..................................................................................................................................12-2
2.2 WTDAT & WTCNT...........................................................................................................................12-2
2.3 Consideration of Debugging Environment.......................................................................................12-3
3 Watchdog Timer Special Registers...........................................................................................................12-4
3.1 Watchdog Timer Control (WTCON) Register ..................................................................................12-4
3.2 Watchdog Timer Data (WTDAT) Register.......................................................................................12-5
3.3 Watchdog Timer Count (WTCNT) Register.....................................................................................12-5
Chapter 13 PWM Timer
1 Overview....................................................................................................................................................13-1
1.1 Feature.............................................................................................................................................13-1
2 PWM Timer Operation...............................................................................................................................13-3
2.1 Prescaler & Divider ..........................................................................................................................13-3
2.2 Basic Timer Operation .....................................................................................................................13-4
2.3 Auto Reload & Double Buffering......................................................................................................13-5
2.4 Timer Initialization Using Manual Update Bit and Inverter Bit .........................................................13-6
2.5 Timer Operation...............................................................................................................................13-7
2.6 Pulse Width Modulation (PWM).......................................................................................................13-8
2.7 Output Level Control........................................................................................................................13-9
2.8 DEAD Zone Generator ....................................................................................................................13-10
2.9 DMA Request Mode.........................................................................................................................13-11
3 PWM Timer Control Registers .................................................................................................................13-12
3.1 Timer Configuration Register0 (TCFG0) ..........................................................................................13-12
3.2 Timer Configuration Register1 (TCFG1) .........................................................................................13-13
3.3 Timer Control (TCON) Register.......................................................................................................13-14
3.4 Timer 0 Count Buffer Register & Compare Buffer Register (TCNTB0/TCMPB0) ...........................13-16
3.5 Timer 0 Count Observation Register (TCNTO0) .............................................................................13-16
3.6 Timer 1 Count Buffer Register & Compare Buffer Register (TCNTB1/TCMPB1) ...........................13-17
3.7 Timer 1 Count Observation Register (TCNTO1) .............................................................................13-17
3.8 Timer 2 Count Buffer Register & Compare Buffer Register (TCNTB2/TCMPB2) ...........................13-18
3.9 Timer 2 Count Observation Register (TCNTO2).............................................................................13-18
3.10 Timer 3 Count Buffer Register & Compare Buffer Register (TCNTB3/TCMPB3) .........................13-19
3.11 Timer 3 Count Observation Register (TCNTO3) ...........................................................................13-19
3.12 Timer 4 Count Buffer Register (TCNTB4) .....................................................................................13-20
3.13 Timer 4 Count Observation Register (TCNTO4) ...........................................................................13-20
S3C2450X RISC MICROPROCESSOR xi
Table of Contents (Continued)
Chapter 14 Real Time Clock (RTC)
1 Overview ...................................................................................................................................................14-1
1.1 Features...........................................................................................................................................14-1
1.2 Real Time Clock Operation Description ..........................................................................................14-2
1.3 External Interface ............................................................................................................................14-6
1.4 Register Description ........................................................................................................................14-7
1.5 Individual Register Descriptions......................................................................................................14-8
Chapter 15 UART
1 Overview ...................................................................................................................................................15-1
1.1 Features...........................................................................................................................................15-1
2 Block Diagram...........................................................................................................................................15-2
2.1 UART Operation..............................................................................................................................15-3
3 UART Special Registers ...........................................................................................................................15-12
3.1 UART Line Control Register............................................................................................................15-12
3.2 UART Control Register....................................................................................................................15-13
3.3 UART FIFO Control Register ..........................................................................................................15-15
3.4 UART Modem Control Register.......................................................................................................15-16
3.5 UART Tx/Rx Status Register...........................................................................................................15-17
3.6 UART Error Status Register ............................................................................................................15-18
3.7 UART FIFO Status Register............................................................................................................15-19
3.8 UART Modem Status Register ........................................................................................................15-20
3.9 UART Transmit BUffer register (Holding Register & FIFO Register).............................................. 15-21
3.10 UART Receive BUffer Register (Holding Register & FIFO Register) ...........................................15-21
3.11 UART Baud RATE Divisor Register ..............................................................................................15-22
3.12 UART Dividing Slot Register .........................................................................................................15-23
Chapter 16 USB Host Controller
1 Overview ...................................................................................................................................................16-1
1.1 USB Host Controller Special Registers...........................................................................................16-2
xii S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 17 USB 2.0 Function
1 Overview....................................................................................................................................................17-1
1.1 Feature.............................................................................................................................................17-1
2 Block Diagram ...........................................................................................................................................17-2
3 To Activate USB Port1 for USB 2.0 Function............................................................................................17-3
4 SIE (Serial Interface Engine).....................................................................................................................17-4
5 UPH (Universal Protocol Handler) ............................................................................................................17-4
6 UTMI (USB 2.0 Transceiver Macrocell Interface) .....................................................................................17-4
7 USB 2.0 Function Controller Special Registers ........................................................................................17-5
8 Registers ...................................................................................................................................................17-7
8.1 Index Register (IR)...........................................................................................................................17-7
8.2 Endpoint Interrupt Register (EIR) ....................................................................................................17-8
8.3 Endpoint Interrupt Enable Register (EIER)......................................................................................17-9
8.4 Function Address Register (FAR)....................................................................................................17-10
8.5 ENdpoint Direction Register (EDR) .................................................................................................17-11
8.6 Test Register (TR) ...........................................................................................................................17-12
8.7 System Status Register (SSR) ........................................................................................................17-13
8.8 System Control Register (SCR).......................................................................................................17-15
8.9 EP0 Status Register (EP0SR) .........................................................................................................17-16
8.10 EP0 Control Register (EP0CR)......................................................................................................17-17
8.11 Endpoint# Buffer Register (EP#BR) .............................................................................................17-18
8.12 Endpoint Status Register (ESR) ....................................................................................................17-19
8.13 Endpoint Control Register (ECR) ..................................................................................................17-21
8.14 Byte read Count Register (BRCR).................................................................................................17-22
8.15 Byte Write Count Register (BWCR)...............................................................................................17-23
8.16 MAX Packet Register (MPR) .........................................................................................................17-24
8.17 DMA Control Register (DCR).........................................................................................................17-25
8.18 DMA Transfer Counter Register (DTCR).......................................................................................17-26
8.19 DMA FIFO Counter Register (DFCR)............................................................................................17-27
8.20 DMA Total Transfer Counter Register 1/2 (DTTCR 1/2) ...............................................................17-28
8.21 DMA Interface Control Register (DICR) ........................................................................................17-29
8.22 Memory Base Address Register (MBAR) ......................................................................................17-30
8.23 Memory Current Address Register (MCAR)..................................................................................17-31
8.24 Burst FIFO Control Register(FCON) .............................................................................................17-31
8.25 Burst FIFO Status Register(FSTAT)..............................................................................................17-31
8.26 AHB Master(DMA) Operation Flow Chart......................................................................................17-32
S3C2450X RISC MICROPROCESSOR xiii
Table of Contents (Continued)
Chapter 18 IIC-Bus Interface
1 Overview ...................................................................................................................................................18-1
1.1 IIC-Bus Interface..............................................................................................................................18-3
1.2 Start And Stop Conditions ...............................................................................................................18-3
1.3 Data Transfer Format ......................................................................................................................18-4
1.4 ACK Signal Transmission................................................................................................................18-5
1.5 Read-Write Operation......................................................................................................................18-6
1.6 Bus Arbitration Procedures .............................................................................................................18-6
1.7 Abort Conditions..............................................................................................................................18-6
1.8 Configuring IIC-Bus .........................................................................................................................18-6
1.9 Flowcharts of Operations in Each Mode .........................................................................................18-7
2 IIC-Bus Interface Special Registers..........................................................................................................18-11
2.1 Multi-Master IIC-Bus Control (IICCON) Register ............................................................................18-11
2.2 Multi-Master IIC-Bus Control/Status (IICSTAT) Register................................................................18-12
2.3 Multi-Master IIC-Bus Address (IICADD) Register ...........................................................................18-13
2.4 Multi-Master IIC-Bus Transmit/Receive Data Shift (IICDS) Register..............................................18-13
2.5 Multi-Master IIC-Bus Line Control(IICLC) Register.........................................................................18-14
Chapter 19 2D
1 Introduction ...............................................................................................................................................19-1
1.1 Features...........................................................................................................................................19-1
2 Color Format Conversion..........................................................................................................................19-2
3 Command FIFO ........................................................................................................................................19-3
4 Rendering Pipeline....................................................................................................................................19-4
4.1 Primitive Drawing.............................................................................................................................19-4
4.2 Rotation ...........................................................................................................................................19-9
4.3 Clipping............................................................................................................................................19-11
4.4 Stencil Test......................................................................................................................................19-11
4.5 Raster Operation .............................................................................................................................19-11
4.6 Alpha Blending ................................................................................................................................19-13
5 Register Descriptions................................................................................................................................19-14
5.1 General Registers............................................................................................................................19-16
5.2 Command Registers........................................................................................................................19-19
5.3 Parameter Setting Registers ...........................................................................................................19-21
xiv S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 20 HS_SPI Controller
1 Overview....................................................................................................................................................20-1
2 Features ....................................................................................................................................................20-1
3 Signal Descriptions....................................................................................................................................20-2
4 Operation...................................................................................................................................................20-2
4.1 Operation Mode ...............................................................................................................................20-3
4.2 FIFO Access ....................................................................................................................................20-3
4.3 Trailing Bytes in the Rx FIFO...........................................................................................................20-3
4.4 Packet Number Control ...................................................................................................................20-3
4.5 NCS Control.....................................................................................................................................20-3
4.6 HS_SPI Transfer Format .................................................................................................................20-4
5 Special Function Register Descriptions ....................................................................................................20-5
5.1 Setting Sequence of Special Function Register ..............................................................................20-5
5.2 Special Function Register................................................................................................................20-6
Chapter 21 SD/MMC Host Controller
1 Overview....................................................................................................................................................21-1
2 Features ....................................................................................................................................................21-1
3 Block Diagram ...........................................................................................................................................21-2
4 Sequence ..................................................................................................................................................21-3
4.1 SD Card Detection Sequence..........................................................................................................21-3
4.2 SD Clock Supply Sequence.............................................................................................................21-4
4.3 SD Clock Stop Sequence ................................................................................................................21-5
4.4 SD Clock Frequency Change Sequence.........................................................................................21-5
4.5 SD Bus Power Control Sequence....................................................................................................21-6
4.6 Change Bus Width Sequence..........................................................................................................21-7
4.7 Timeout Setting for DAT Line ..........................................................................................................21-8
4.8 SD Transaction Generation .............................................................................................................21-8
4.9 SD Command Issue Sequence .......................................................................................................21-9
4.10 Command Complete Sequence.....................................................................................................21-10
4.11 Transaction Control with Data Transfer Using DAT Line ..............................................................21-12
4.12 Abort Transaction...........................................................................................................................21-16
5 SDI Special Registers ...............................................................................................................................21-17
5.1 Configuration Register Types ..........................................................................................................21-17
5.2 SDMA System Address Register.....................................................................................................21-18
5.3 Block Size Register..........................................................................................................................21-19
5.4 Block Count Register .......................................................................................................................21-21
5.5 Argument Register...........................................................................................................................21-22
5.6 Transfer Mode Register...................................................................................................................21-23
5.7 Command Register..........................................................................................................................21-25
5.8 Response Register ..........................................................................................................................21-27
5.9 Buffer Data Port Register.................................................................................................................21-29
5.10 Present State Register...................................................................................................................21-30
5.11 Host Control Register ....................................................................................................................21-36
5.12 Power Control Register..................................................................................................................21-37
S3C2450X RISC MICROPROCESSOR xv
Table of Contents (Continued)
Chapter 21 SD/MMC Host Controller (Continued)
5.13 Block Gap Control Register...........................................................................................................21-38
5.14 Wakeup Control Register ..............................................................................................................21-40
5.15 Clock Control Register ..................................................................................................................21-41
5.16 Timeout Control Register ..............................................................................................................21-43
5.17 Software Reset Register ...............................................................................................................21-44
5.18 Normal Interrupt Status Register...................................................................................................21-46
5.19 Error Interrupt Status Register ......................................................................................................21-50
5.20 Normal Interrupt Status Enable Register ......................................................................................21-53
5.21 Error Interrupt Status Enable Register ..........................................................................................21-55
5.22 Normal Interrupt Signal Enable Register.......................................................................................21-56
5.23 Error Interrupt Signal Enable Register ..........................................................................................21-58
5.24 Autocmd12 Error Status Register..................................................................................................21-59
5.25 Capabilities Register......................................................................................................................21-61
5.26 Maximum Current Capabilities Register........................................................................................21-63
5.27 Control Register 2..........................................................................................................................21-64
5.28 Control Register 3..........................................................................................................................21-67
5.29 Debug Register..............................................................................................................................21-68
5.30 Control Register 4..........................................................................................................................21-68
5.31 Force Event Register for Auto CMD12 Error Status .....................................................................21-69
5.32 Force Event Register for Error Interrupt Status.............................................................................21-70
5.33 ADMA Error Status Register .........................................................................................................21-71
5.34 ADMA System Address Register ..................................................................................................21-73
5.35 HOST Controller Version Register ................................................................................................21-74
Chapter 22 LCD Controller
1 Overview ...................................................................................................................................................22-1
1.1 Features...........................................................................................................................................22-2
2 Functional Description ..............................................................................................................................22-3
2.1 Brief of the sub-block.......................................................................................................................22-3
2.2 Data Flow.........................................................................................................................................22-3
2.3 Interface...........................................................................................................................................22-4
2.4 Overview of the Color Data .............................................................................................................22-5
2.5 VD signal Connection......................................................................................................................22-18
2.6 Palette usage...................................................................................................................................22-20
3 Window Blending ......................................................................................................................................22-22
3.1 Overview..........................................................................................................................................22-22
3.2 Blending Diagram/Details................................................................................................................22-23
4 Vtime Controller Operation .......................................................................................................................22-26
4.1 RGB Interface..................................................................................................................................22-26
4.2 I80-System Interface .......................................................................................................................22-26
5 Virtual Display ...........................................................................................................................................22-27
6 RGB Interface I/O .....................................................................................................................................22-28
7 LCD CPU Interface I/O (I80-system I/F)...................................................................................................22-29
8 Programmer’s Model.................................................................................................................................22-31
8.1 Overview..........................................................................................................................................22-31
xvi S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 23 Camera Interface
1 Overview....................................................................................................................................................23-1
1.1 Features...........................................................................................................................................23-2
2 External Interface ......................................................................................................................................23-2
2.1 Signal Description............................................................................................................................23-2
2.2 Timing Diagram................................................................................................................................23-3
3 External/Internal Connection Guide ..........................................................................................................23-5
4 Camera Interface Operation......................................................................................................................23-5
4.1 Two DMA Ports................................................................................................................................23-5
4.2 CLOCK Domain ...............................................................................................................................23-7
4.3 Frame Memory Hirerarchy...............................................................................................................23-7
4.4 Memory Storing Method ..................................................................................................................23-9
4.5 Timing Diagram for Register Setting................................................................................................23-10
4.6 MSDMA Feature ..............................................................................................................................23-13
5 Software Interface .....................................................................................................................................23-14
6 Camera Interface Special Registers .........................................................................................................23-14
6.1 Source Format Register...................................................................................................................23-14
6.2 Window Option Register ..................................................................................................................23-15
6.3 Global Control Register ...................................................................................................................23-17
6.4 Window Option Register 2...............................................................................................................23-19
6.5 Y1 Start Address Register ...............................................................................................................23-19
6.6 Y2 Start Address Register ...............................................................................................................23-19
6.7 Y3 Start Address Register ...............................................................................................................23-20
6.8 Y4 Start Address Register ...............................................................................................................23-20
6.9 Cb1 Start Address Register.............................................................................................................23-20
6.10 Cb2 Start Address Register...........................................................................................................23-21
6.11 Cb3 Start Address Register...........................................................................................................23-21
6.12 Cb4 Start Address Register...........................................................................................................23-21
6.13 Cr1 Start Address Register............................................................................................................23-21
6.14 Cr2 Start Address Register............................................................................................................23-22
6.15 Cr3 Start Address Register............................................................................................................23-22
6.16 Cr4 Start Address Register............................................................................................................23-22
6.17 Codec Target Format Register ......................................................................................................23-23
6.18 Codec DMA Control Register ........................................................................................................23-25
6.19 Register Setting Guide for Codec Scaler and Preview Scaler ......................................................23-26
6.20 Codec Pre-Scaler Control Register 1 ............................................................................................23-29
6.21 Codec Pre-Scaler Control Register 2 ............................................................................................23-29
6.22 Codec Main-Scaler Control Register.............................................................................................23-30
6.23 Codec DMA Target Area Register.................................................................................................23-30
6.24 Codec Status Register...................................................................................................................23-31
6.25 RGB1 Start Address Register........................................................................................................23-31
6.26 RGB2 Start Address Register........................................................................................................23-32
6.27 RGB3 Start Address Register........................................................................................................23-32
6.28 RGB4 Start Address Register........................................................................................................23-32
6.29 Preview Target Format Register....................................................................................................23-33
6.30 Preview DMA Control Register......................................................................................................23-34
S3C2450X RISC MICROPROCESSOR xvii
Table of Contents (Continued)
Chapter 23 Camera Interface (Continued)
6.31 Preview Pre-Scaler Control Register 1 .........................................................................................23-35
6.32 Preview Pre-Scaler Control Register 2 .........................................................................................23-35
6.33 Preview Main-Scaler Control Register ..........................................................................................23-36
6.34 Preview DMA Target Area Register ..............................................................................................23-36
6.35 Preview Status Register ................................................................................................................23-37
6.36 Image Capture Enable Register....................................................................................................23-38
6.37 Codec Capture Sequence Register ..............................................................................................23-39
6.38 Codec Scan Line Offset Register..................................................................................................23-40
6.39 Preview Scan Line Offset Register................................................................................................23-40
6.40 Image Effects Register ..................................................................................................................23-42
6.41 MSDMA Y start Address Register.................................................................................................23-43
6.42 MSDMA Cb start Address Register...............................................................................................23-43
6.43 MSDMA Cr start Address Register................................................................................................23-43
6.44 MSDMA Y end Address Register..................................................................................................23-44
6.45 MSDMA Cb end Address Register................................................................................................23-44
6.46 MSDMA Cr end Address Register.................................................................................................23-44
6.47 MSDMA Y Offset Register.............................................................................................................23-45
6.48 MSDMA Cb Offset Register ..........................................................................................................23-45
6.49 MSDMA Cr Offset Register ...........................................................................................................23-45
6.50 MSDMA Source Image Width Register.........................................................................................23-45
6.51 MSDMA Control Register ..............................................................................................................23-47
Chapter 24 ADC & Touch Screen Interface
1 Overview ...................................................................................................................................................24-1
1.1 Features...........................................................................................................................................24-1
2 ADC & Touch Screen Interface Operation................................................................................................24-2
2.1 Block Diagram .................................................................................................................................24-2
2.2 Function Descriptions......................................................................................................................24-3
3 ADC and Touch Screen Interface Special Registers................................................................................24-5
3.1 ADC Control (ADCCON) Register...................................................................................................24-5
3.2 ADC Touch Screen Control (ADCTSC) Register............................................................................24-6
3.3 ADC Start Delay (ADCDLY) Register..............................................................................................24-7
3.4 ADC Conversion Data (ADCDAT0) Register ..................................................................................24-8
3.5 ADC Conversion Data (ADCDAT1) Register ..................................................................................24-9
3.6 ADC Touch Screen up-Down Int Check Register (ADCUPDN)......................................................24-9
3.7 ADC Channel Mux Register (ADCMUX) .........................................................................................24-10
xviii S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 25 IIS-Bus Interface
1 Overview....................................................................................................................................................25-1
2 Feature ......................................................................................................................................................25-1
3 Signals.......................................................................................................................................................25-1
4 Block Diagram ...........................................................................................................................................25-2
5 Functional Descriptions.............................................................................................................................25-2
5.1 Master/Slave Mode..........................................................................................................................25-3
6 Audio Serial Data Format..........................................................................................................................25-5
6.1 IIS-bus Format .................................................................................................................................25-5
6.2 MSB (Left) Justified..........................................................................................................................25-5
6.3 LSB (Right) Justified ........................................................................................................................25-5
6.4 Sampling Frequency and Master Clock...........................................................................................25-7
6.5 IIS Clock Mapping Table..................................................................................................................25-7
7 Programming guiyde .................................................................................................................................25-8
7.1 Initialization ......................................................................................................................................25-8
7.2 Play Mode (TX mode) with DMA .....................................................................................................25-8
7.3 Recording Mode (RX mode) with DMA ...........................................................................................25-8
7.4 Example Code .................................................................................................................................25-9
8 IIS-BUS Interface Special Registers .........................................................................................................25-15
8.1 IIS Control Register (IISCON)..........................................................................................................25-16
8.2 IIS Mode Register (IISMOD)............................................................................................................25-18
8.3 IIS FIFO Control Register (IISFIC)...................................................................................................25-20
8.4 IIS Prescaler Control Register (IISPSR)..........................................................................................25-20
8.5 IIS Transmit Register (IISTXD)........................................................................................................25-21
8.6 IIS Receive Register (IISRXD).........................................................................................................25-21
Chapter 26 IIS Multi Audio Interface
1 Overview....................................................................................................................................................26-1
2 Feature ......................................................................................................................................................26-1
3 Signals.......................................................................................................................................................26-1
4 Block Diagram ...........................................................................................................................................26-2
5 Functional Descriptions.............................................................................................................................26-2
5.1 Master/Slave Mode..........................................................................................................................26-3
5.2 DMA Transfer...................................................................................................................................26-4
6 Audio Serial Data Format..........................................................................................................................26-5
6.1 IIS-Bus Format.................................................................................................................................26-5
6.2 MSB (Left) Justified..........................................................................................................................26-5
6.3 LSB (Right) Justified ........................................................................................................................26-5
6.4 Sampling Frequency and Master Clock...........................................................................................26-7
6.5 IIS Clock Mapping Table..................................................................................................................26-7
S3C2450X RISC MICROPROCESSOR xix
Table of Contents (Continued)
Chapter 26 IIS Multi Audio Interface (Continued)
7 Programming Guide..................................................................................................................................26-8
7.1 Initialization......................................................................................................................................26-8
7.2 Play Mode (TX mode) with DMA .....................................................................................................26-8
7.3 Recording Mode (RX mode) with DMA ...........................................................................................26-8
7.4 Example Code .................................................................................................................................26-9
8 IIS-BUS Interface Special Registers.........................................................................................................26-15
8.1 IIS Control Register (IISCON) .........................................................................................................26-16
8.2 IIS Mode Register (IISMOD) ...........................................................................................................26-18
8.3 IIS FIFO Control Register (IISFIC) ..................................................................................................26-20
8.4 IIS Prescaler Control Register (IISPSR)..........................................................................................26-20
8.5 IIS Transmit Register (IISTXD)........................................................................................................26-21
8.6 IIS Receive Register (IISRXD) .......................................................................................................26-21
Chapter 27 AC97 Controller
1 Overview ...................................................................................................................................................27-1
1.1 Feature ............................................................................................................................................27-1
1.2 Signals.............................................................................................................................................27-1
2 AC97 Controller Operation........................................................................................................................27-2
2.1 Block Diagram .................................................................................................................................27-2
2.2 Internal Data Path............................................................................................................................27-3
3 Operation Flow Chart................................................................................................................................27-4
4 AC-link Digital Interface Protocol ..............................................................................................................27-5
4.1 AC-link Output Frame (SDATA_OUT).............................................................................................27-6
4.2 AC-link Input Frame (SDATA_IN) ...................................................................................................27-7
5 AC97 Power-Down ...................................................................................................................................27-9
6 Codec Reset .............................................................................................................................................27-10
7 AC97 Controller State Diagram ................................................................................................................27-11
8 AC97 Controller Special Registers ...........................................................................................................27-12
8.1 AC97 Special Funcion Register Summary......................................................................................27-12
8.2 AC97 Global Control Register (AC_GLBCTRL).............................................................................. 27-13
8.3 AC97 Global Status Register (AC_GLBSTAT) ...............................................................................27-14
8.4 AC97 Codec Command Register (AC_CODEC_CMD)..................................................................27-14
8.5 AC97 Codec Status Register (AC_CODEC_STAT)........................................................................27-15
8.6 AC97 PCM Out/In Channel Fifo Address Register (AC_PCMADDR) ............................................27-15
8.7 AC97 MIC In Channel FIFO Address Register (AC_MICADDR)....................................................27-16
8.8 AC97 PCM Out/In Channel FIFO Data Register (AC_PCMDATA).................................................27-16
8.9 AC97 MIC In Channel FIFO Data Register (AC_MICDATA) ..........................................................27-16
xx S3C2450X RISC MICROPROCESSOR
Table of Contents (Continued)
Chapter 28 PCM Audio Interface
1 Overview....................................................................................................................................................28-1
1.1 Feature.............................................................................................................................................28-1
1.2 Signals .............................................................................................................................................28-1
2 PCM Audio Interface .................................................................................................................................28-2
3 PCM Timing...............................................................................................................................................28-3
3.1 PCM Input Clock Diagram ...............................................................................................................28-4
3.2 PCM Registers.................................................................................................................................28-5
3.3 PCM Register Summary ..................................................................................................................28-5
3.4 PCM Control Register......................................................................................................................28-6
3.5 PCM CLK Control Register..............................................................................................................28-8
3.6 The PCM Tx FIFO Register .............................................................................................................28-9
3.7 PCM Rx FIFO Register....................................................................................................................28-10
3.8 PCM Interrupt Control Register .......................................................................................................28-11
3.9 PCM Interrupt Status Register.........................................................................................................28-14
3.10 PCM FIFO Status Register ............................................................................................................28-16
3.11 PCM Interrupt Clear Register ........................................................................................................28-17
Chapter 29 Electrical Data
1 Absolute Maximum Ratings ......................................................................................................................29-1
2 Recommended Operating Conditions.......................................................................................................29-2
3 D.C. Electrical Characteristics...................................................................................................................29-4
4 A.C. Electrical Characteristics...................................................................................................................29-6
Chapter 30 Mechanical Data
1 Package Dimensions.................................................................................................................................30-1
S3C2450X RISC MICROPROCESSOR xxi
List of Figures
Figure Title Page
Number Number
1-1 S3C2450 Block Diagram .............................................................................................1-5
1-2 S3C2450 Pin Assignments (400-FBGA) Top view......................................................1-6
1-3 Memory Map................................................................................................................1-32
2-1 System Controller Block Diagram................................................................................2-2
2-2 Power-On Reset Sequence.........................................................................................2-4
2-3 Clock Generator Block Diagram..................................................................................2-6
2-4 Main Oscillator Circuit Examples................................................................................. 2-7
2-5 PLL(Phase-Locked Loop) Block Diagram ...................................................................2-8
2-6 The Case that Changes Slow Clock by Setting PMS Value........................................2-8
2-7 The Clock Distribution Block Diagram.........................................................................2-9
2-8 MPLL Based Clock Domain.........................................................................................2-9
2-9 EPLL Based Clock Domain .........................................................................................2-12
2-10 Power Mode State Diagram.........................................................................................2-13
2-11 Entering STOP Mode and Exiting STOP Mode (wake-up)..........................................2-17
2-12 Entering SLEEP Mode and Exiting SLEEP Mode (wake-up)......................................2-18
2-13 Usage of PWROFF_SLP.............................................................................................2-34
3-1 The Configuration of MATRIX and Memory Sub-System of S3C2450 .......................3-1
5-1 SMC Block Diagram ....................................................................................................5-3
5-2 SMC Core Block Diagram............................................................................................5-3
5-3 External Memory Two Output Enable Delay State Read ............................................5-4
5-4 Read Timing Diagram (DRnCS = 1, DRnOWE = 0)....................................................5-4
5-5 Read Timing Diagram (DRnCS = 1, DRnOWE = 1)....................................................5-5
5-6 External Burst ROM with WSTRD=2 and WSTBRD=1 Fixed Length Burst Read......5-6
5-7 External Synchronous Fixed Length Four Transfer Burst Read .................................5-7
5-8 External Memory Two Write Enable Delay State Write............................................... 5-8
5-9 Write Timing Diagram (DRnCS = 1, DRnOWE = 0)....................................................5-9
5-10 Write Timing Diagram (DRnCS = 1, DRnOWE = 1)....................................................5-9
5-11 Synchronous Two Wait State Write.............................................................................5-10
5-12 Read, then two Writes (WSTRD=WSTWR=0), Two Turnaround Cycles (IDCY=2) ...5-11
5-13 Memory Interface with 8-bit SRAM (2MB)...................................................................5-13
5-14 Memory Interface with 16-bit SRAM (4MB).................................................................5-13
6-1 Mobile DRAM Controller Block Diagram .....................................................................6-2
6-2 Memory Interface with 16-bit SDRAM (4Mx16, 4banks) .............................................6-4
6-3 Memory Interface with 32-bit SDRAM (4Mx16 * 2ea, 4banks)....................................6-4
6-4 Memory Interface with 16-bit Mobile DDR and DDR2.................................................6-5
6-5 DRAM Timing Diagram................................................................................................6-6
6-6 CL (CAS Latency) Timing Diagram .............................................................................6-6
6-7 tARFC Timing Diagram..................................................................................................6-7
xxii S3C2450X RISC MICROPROCESSOR
List of Figures
Figure Title Page
Number Number
7-1 NAND Flash Controller Block Diagram........................................................................7-2
7-2 NAND Flash Controller Boot Loader Block Diagram ...................................................7-2
7-3 CLE & ALE Timing (TACLS=1, TWRPH0=0, TWRPH1=0) Block Diagram ................7-3
7-4 nWE & nRE Timing (TWRPH0=0, TWRPH1=0) Block Diagram .................................7-4
7-5 NAND Flash Memory Mapping Block Diagram............................................................7-10
7-6 A 8-bit NAND Flash Memory Interface Block Diagram................................................7-11
7-7 Softlock and Lock-tight.................................................................................................7-20
8-1 CF Controller Top Block Diagram................................................................................8-3
8-2 PC Card Controller Top Block Diagram.......................................................................8-4
8-3 ATA Controller Top Block Diagram..............................................................................8-5
8-4 PC Card State Definition..............................................................................................8-6
8-5 PIO Mode Waveform....................................................................................................8-7
8-6 Memory Map Diagram..................................................................................................8-8
9-1 Basic DMA Timing Diagram.........................................................................................9-4
9-2 Demand/Handshake Mode Comparison......................................................................9-5
9-3 Burst 4 Transfer size....................................................................................................9-6
9-4 Single service, Demand Mode, Single Transfer Size ..................................................9-7
9-5 Single service, Handshake Mode, Single Transfer Size..............................................9-7
9-6 Whole service, Handshake Mode, Single Transfer Size .............................................9-7
10-1 Interrupt Process Diagram ...........................................................................................10-1
10-2 Interrupt Group Multiplexing Diagram..........................................................................10-2
10-3 Priority Generating Block .............................................................................................10-6
12-1 Watchdog Timer Block Diagram ..................................................................................12-2
13-1 16-bit PWM Timer Block Diagram................................................................................13-2
13-2 Timer Operations .........................................................................................................13-4
13-3 Example of Double Buffering Function ........................................................................13-5
13-4 Example of a Timer Operation .....................................................................................13-7
13-5 Example of PWM .........................................................................................................13-8
13-6 Inverter On/Off .............................................................................................................13-9
13-7 The Wave Form When a Dead Zone Feature is Enabled ...........................................13-10
13-8 Timer4 DMA Mode Operation ......................................................................................13-11
S3C2450X RISC MICROPROCESSOR xxiii
List of Figures
Figure Title Page
Number Number
14-1 Real Time Clock Block Diagram..................................................................................14-2
14-2 RTC Tick Interrupt Clock Scheme ...............................................................................14-5
14-3 Main Oscillator Circuit Example................................................................................... 14-6
15-1 UART Block Diagram (with FIFO) ...............................................................................15-2
15-2 UART AFC Interface....................................................................................................15-4
15-3 Example showing UART Receiving 5 Characters with 2 Errors..................................15-7
15-4 IrDA Function Block Diagram ......................................................................................15-8
15-5 Serial I/O Frame Timing Diagram (Normal UART)......................................................15-9
15-6 Infrared Transmit Mode Frame Timing Diagram .........................................................15-9
15-7 Infrared Receive Mode Frame Timing Diagram ..........................................................15-9
15-8 nCTS and Delta CTS Timing Diagram ........................................................................15-20
16-1 USB Host Controller Block Diagram............................................................................16-1
17-1 USB2.0 Block Diagram................................................................................................17-2
17-2 USB2.0 Function Block Diagram .................................................................................17-3
17-3 OUT Transfer Operation Flow .....................................................................................17-32
17-4 IN Transfer Operation Flow .........................................................................................17-33
18-1 IIC-Bus Block Diagram ................................................................................................18-2
18-2 Start and Stop Condition..............................................................................................18-3
18-3 IIC-Bus Interface Data Format.....................................................................................18-4
18-4 Data Transfer on the IIC-Bus.......................................................................................18-5
18-5 Acknowledge on the IIC-Bus .......................................................................................18-5
18-6 Operations for Master/Transmitter Mode.....................................................................18-7
18-7 Operations for Master/Receiver Mode.........................................................................18-8
18-8 Operations for Slave/Transmitter Mode....................................................................... 18-9
18-9 Operations for Slave/Receiver Mode...........................................................................18-10
19-1 Color Format................................................................................................................19-2
19-2 YUV 2-Planar Format ..................................................................................................19-3
19-3 2D Rendering Pipeline.................................................................................................19-4
19-4 Data Format.................................................................................................................19-4
19-5 Transparent Mode .......................................................................................................19-6
19-6 Color Expansion ..........................................................................................................19-8
19-7 Font Drawing with Transparent Mode .........................................................................19-8
19-8 Rotation Example ........................................................................................................19-10
xxiv S3C2450X RISC MICROPROCESSOR
List of Figures
Figure Title Page
Number Number
20-1 HS_SPI Transfer Format..............................................................................................20-4
21-1 HSMMC Block Diagram ...............................................................................................21-2
21-2 SD Card Detect Sequence...........................................................................................21-3
21-3 SD Clock Supply Sequence.........................................................................................21-4
21-4 SD Clock Stop Sequence ............................................................................................21-5
21-5 SD Clock Change Sequence .......................................................................................21-5
21-6 SD Bus Power Control Sequence................................................................................21-6
21-7 Change Bus Width Sequence......................................................................................21-7
21-8 Timeout Setting Sequence...........................................................................................21-8
21-9 Timeout Setting Sequence...........................................................................................21-9
21-10 Command Complete Sequence...................................................................................21-11
21-11 Transaction Control with Data Transfer Using DAT Line Sequence (Not using DMA)
21-13
21-12 Transaction Control with Data Transfer Using DAT Line Sequence (Using DMA) .....21-15
21-13 Card Detect State.........................................................................................................21-34
21-14 Timing of Command Inhibit (DAT) and Command Inhibit (CMD) with data transfer ...21-35
21-15 Timing of Command Inhibit (DAT) for the case of response with busy .......................21-35
21-16 Timing of Command Inhibit (CMD) for the case of no response command ................21-35
22-1 LCD Controller Block diagram .....................................................................................22-1
22-2 Block diagram of the Data Flow...................................................................................22-4
22-3 16BPP(1+5:5:5, BSWP/HWSWP=0) Display Types....................................................22-12
22-4 16BPP(5:6:5, BSWP/HWSWP=0) Display Types........................................................22-13
22-5 Blending Operations.....................................................................................................22-22
22-6 Color Key Block Diagram.............................................................................................22-24
22-7 Color Key Operations...................................................................................................22-24
22-8 Color Key Function Configurations ..............................................................................22-25
22-9 Example of Scrolling in Virtual Display ........................................................................22-27
22-10 LCD RGB Interface Timing ..........................................................................................22-28
22-11 Write Cycle Timing.......................................................................................................22-29
S3C2450X RISC MICROPROCESSOR xxv
List of Figures
Figure Title Page
Number Number
23-1 Camera interface overview..........................................................................................23-1
23-2 ITU-R BT 601 Input Timing Diagram...........................................................................23-3
23-3 ITU-R BT 601 Interlace Timing Diagram .....................................................................23-3
23-4 ITU-R BT 656 Input Timing Diagram...........................................................................23-3
23-5 Sync signal timing diagram..........................................................................................23-4
23-6 IO Connection Guide ...................................................................................................23-5
23-7 Two DMA Ports............................................................................................................23-6
23-8 CAMIF Clock Generation.............................................................................................23-7
23-9 Ping-pong Memory Hierarchy......................................................................................23-8
23-10 Memory Storing Style ..................................................................................................23-9
23-11 Timing Diagram for Register Setting ...........................................................................23-11
23-12 Timing Diagram for Last IRQ.......................................................................................23-13
23-13 MSDMA or External Camera interface (only CAMIFpreview path) .............................23-13
23-14 Window Offset Scheme (WinHorOfst2 & WinVerOfst2 are assigned
in the CIWDOFST2 register) ......................................................................................23-15
23-15 Interrupt Generation Scheme ......................................................................................23-18
23-17 Scaling scheme ...........................................................................................................23-27
23-18 Preview Image Mirror and Rotation.............................................................................23-33
23-19 Capture codec dma frame control ...............................................................................23-39
23-20 Scan line offset ............................................................................................................23-41
23-21 Image Effect Result .....................................................................................................23-42
23-22 ENVID_MS SFR setting when DMA start to Read Memory Data ...............................23-48
23-23 SFR & Operation (related each DMA when Selected MSDMA input path).................23-48
24-1 ADC and Touch Screen Interface Block Diagram.......................................................24-2
24-2 Timing Diagram in Auto (Sequential) X/Y Position Conversion Mode ........................24-4
25-1 IIS-Bus Block Diagram.................................................................................................25-2
25-2 IIS Clock Control Block Diagram .................................................................................25-3
25-3 IIS Audio Serial Data Formats .....................................................................................25-6
25-4 TX FIFO Structure for BLC = 00 or BLC = 01..............................................................25-10
25-5 TX FIF0 Structure for BLC = 10 (24-bits/channel).......................................................25-11
25-6 RX FIFO Structure for BLC = 00 or BLC = 01 .............................................................25-13
25-7 RX FIF0 Structure for BLC = 10 (24-bits/channel) ......................................................25-14
26-1 IIS-Bus Block Diagram.................................................................................................26-2
26-2 IIS Clock Control Block Diagram .................................................................................26-3
26-3 IIS Audio Serial Data Formats .....................................................................................26-6
26-4 TX FIFO Structure for BLC = 00 or BLC = 01..............................................................26-10
26-5 TX FIF0 Structure for BLC = 10 (24-bits/channel).......................................................26-11
26-6 RX FIFO Structure for BLC = 00 or BLC = 01 .............................................................26-13
26-7 RX FIF0 Structure for BLC = 10 (24-bits/channel) ......................................................26-14
xxvi S3C2450X RISC MICROPROCESSOR
List of Figures
Figure Title Page
Number Number
27-1 AC97 Block Diagram....................................................................................................27-2
27-2 Internal Data Path ........................................................................................................27-3
27-3 AC97 Operation Flow Chart.........................................................................................27-4
27-4 Bi-directional AC-link Frame with Slot Assignments....................................................27-5
27-5 AC-link Output Frame ..................................................................................................27-6
27-6 AC-link Input Frame .....................................................................................................27-8
27-7 AC97 Power-down Timing ...........................................................................................27-9
27-9 AC97 State Diagram ....................................................................................................27-11
28-1 PCM timing, TX_MSB_POS / RX_MSB_POS = 0.......................................................28-3
28-2 PCM timing, TX_MSB_POS / RX_MSB_POS = 1.......................................................28-3
28-3 Input Clock Diagram for PCM ......................................................................................28-4
29-1 XTIpll Clock Timing ......................................................................................................29-7
29-2 EXTCLK Clock Input Timing ........................................................................................29-7
29-3 EXTCLK/HCLK in case that EXTCLK is used without the PLL ...................................29-7
29-4 HCLK/CLKOUT/SCLK in case that EXTCLK is used ..................................................29-8
29-5 Manual Reset Input Timing ..........................................................................................29-8
29-6 Power-On Oscillation Setting Timing ...........................................................................29-9
29-7 Sleep Mode Return Oscillation Setting Timing ............................................................29-10
29-8 SMC Synchronous Read Timing..................................................................................29-11
29-9 SMC Asynchronous Read Timing................................................................................29-11
29-10 SMC Asynchronous Write Timing................................................................................29-12
29-11 SMC Synchronous Write Timing..................................................................................29-12
29-12 SMC Wait Timing .........................................................................................................29-13
29-13 Nand Flash Timing.......................................................................................................29-14
29-14 SDRAM READ / WRITE Timing (Trp = 2, Trcd = 2, Tcl = 2, DW = 16-bit)..................29-15
29-15 DDR2 Timing................................................................................................................29-16
29-16 SDRAM MRS Timing ...................................................................................................29-17
29-17 SDRAM Auto Refresh Timing (Trp = 2, Trc = 4)..........................................................29-18
29-18 External DMA Timing (Handshake, Single transfer)....................................................29-19
29-19 TFT LCD Controller Timing..........................................................................................29-19
29-20 IIS Interface Timing (I2S Master Mode Only) ..............................................................29-20
29-21 IIS Interface Timing (I2S Slave Mode Only).................................................................29-20
29-22 IIC Interface Timing......................................................................................................29-20
29-23 High Speed SDMMC Interface Timing.........................................................................29-21
29-24 High Speed SPI Interface Timing (CPHA = 0, CPOL = 1)...........................................29-21
29-25 USB Timing (Data signal rise/fall time) ........................................................................29-22
29-26 PCM Interface Timing ..................................................................................................29-22
S3C2450X RISC MICROPROCESSOR xxvii
List of Figures
Figure Title Page
Number Number
30-1 400-FBGA-1313 Package Dimension 1 (Top View)....................................................30-1
30-2 400-FBGA-1313 Package Dimension 2 (Bottom View)...............................................30-2
xxviii S3C2450X RISC MICROPROCESSOR
List of Tables
Table Title Page
Number Number
1-1 400-Pin FBGA Pin Assignments − Pin Number Order (1/4) ........................................1-7
1-1 400-Pin FBGA Pin Assignments − Pin Number Order (2/4) ........................................1-8
1-1 400-Pin FBGA Pin Assignments − Pin Number Order (3/4) ........................................1-9
1-1 400-Pin FBGA Pin Assignments – Pin Number Order (4/4)........................................1-10
1-2 S3C2450 400-Pin FBGA Pin Assignments..................................................................1-11
1-3 I/O Cell Types and Descriptions ..................................................................................1-23
1-4 S3C2450 Signal Descriptions ......................................................................................1-24
1-5 S3C2450 Operation Mode Description ........................................................................1-31
1-6 Base Address of Special Registers..............................................................................1-33
1-7 S3C2450 Special Registers.........................................................................................1-34
2-1 Registers & GPIO Status in RESET (R: reset, S: sustain previous value)..................2-5
2-2 Clock source selection for the main PLL and clock generation logic ..........................2-6
2-3 Clock Source Selection for the EPLL...........................................................................2-7
2-4 PLL & Clock Generator Condition................................................................................2-7
2-5 Clock Division Ratio of MPLL Region ..........................................................................2-10
2-6 ESYSCLK Control........................................................................................................2-12
2-7 The Status of PLL and ARMCLK After Wake-up.........................................................2-19
2-8 Power Saving Mode Entering/Exiting Condition ..........................................................2-20
2-9 System Controller Address Map ..................................................................................2-21
8-1 Timing Parameter Each PIO Mode..............................................................................8-7
8-2 Memory Map Table ......................................................................................................8-9
9-1 DMA request sources for each channel.......................................................................9-2
11-1 S3C2450 Port Configuration (Sheet 1) ........................................................................11-2
14-1 RTC Register summary ...............................................................................................14-7
15-1 Example of nRTS signal change by FIFO Spare size
(In case of Reception Case in UART A) ......................................................................15-4
15-2 Interrupts in Connection with FIFO ..............................................................................15-6
15-3 Clock, EPLL Speed Guide ...........................................................................................15-11
15-4 Recommended Value Table of DIVSLOTn Register ...................................................15-23
16-1 OHCI Registers for USB Host Controller .....................................................................16-2
S3C2450X RISC MICROPROCESSOR xxix
List of Tables
Table Title Page
Number Number
17-1 Non-Indexed Registers................................................................................................17-5
17-2 Indexed Registers........................................................................................................17-6
20-1 External Signals Description........................................................................................20-2
21-1 Determination of Transfer Type...................................................................................21-24
21-2 Relation Between Parameters and the Name of Response Type...............................21-26
21-3 Response Bit Definition for Each Response Type. .....................................................21-27
21-4 The relation between Command CRC Error and Command Timeout Error ...............21-52
21-5 The Relation Between Command CRC Error and Command Timeout Error..............21-60
21-6 Maximum Current Value Definition..............................................................................21-63
22-1 25BPP(A:8:8:8) Palette Data Format ..........................................................................22-20
22-2 19BPP (A:6:6:6) Palette Data Format .........................................................................22-21
22-3 16BPP(A:5:5:5) Palette Data Format ..........................................................................22-21
22-4 Alpha Value Selection Table for Blending ...................................................................22-23
22-5 Relation between VCLK and CLKVAL (Freq. of Video Clock Source=60MHz) .......... 22-26
22-6 LCD Signal Muxing Table (RGB and i-80 I/F) ............................................................. 22-30
23-1 Camera interface signal description ............................................................................23-2
23-2 Video Timing Reference Codes of ITU-656 Format....................................................23-4
23-3 Sync signal timing requirement ...................................................................................23-4
25-1 CODEC clock (CODECLK = 256fs, 384fs, 512fs, 768fs)............................................ 25-7
25-2 IIS Clock Mapping Table..............................................................................................25-7
25-3 Register Summary of IIS Interface ..............................................................................25-15
26-1 CODEC clock (CODECLK = 256fs, 384fs, 512fs, 768fs)............................................ 26-7
26-2 IIS Clock Mapping Table..............................................................................................26-7
27-1 Input Slot 1 Bit Definitions............................................................................................27-7
xxx S3C2450X RISC MICROPROCESSOR
List of Tables
Table Title Page
Number Number
29-1 Absolute Maximum Rating ...........................................................................................29-1
29-2 Recommended Operating Conditions (400MHz).........................................................29-2
29-3 Recommended Operating Conditions (533MHz).........................................................29-3
29-4 Normal I/O PAD DC Electrical Characteristics ............................................................29-4
29-5 Special Memory DDR I/O PAD DC Electrical Characteristics .....................................29-5
29-6 USB DC Electrical Characteristics...............................................................................29-6
29-7 RTC OSC DC Electrical Characteristics ......................................................................29-6
29-8 Clock Timing Constants ...............................................................................................29-23
29-9 SMC Timing Constants ................................................................................................29-24
29-10 NFCON Bus Timing Constants....................................................................................29-24
29-11 Memory Interface Timing Constants (SDRAM) ...........................................................29-25
29-12 DMA Controller Module Signal Timing Constants .......................................................29-26
29-13 TFT LCD Controller Module Signal Timing Constants ................................................29-26
29-14 IIS Controller Module Signal Timing Constants(I2S Master Mode Only) ....................29-26
29-15 IIS Controller Module Signal Timing Constants(I2S Slave Mode Only).......................29-27
29-16 IIC BUS Controller Module Signal Timing....................................................................29-27
29-17 High Speed SPI Interface Transmit/Receive Timing Constants.................................29-28
29-18 USB Electrical Specifications.......................................................................................29-29
29-19 USB Full Speed Output Buffer Electrical Characteristics.............................................29-30
29-20 USB High Speed Output Buffer Electrical Characteristics...........................................29-30
29-21 High Speed SDMMC Interface Transmit/Receive Timing Constants ..........................29-30
29-22 PCM Interface Timing ..................................................................................................29-31
xxxiv S3C2450_UM_REV 1.10
List of Tables
Table Title Page
Number Number
17-1 Non-Indexed Registers ................................................................................................17-5
17-2 Indexed Registers ........................................................................................................17-6
20-1 External Signals Description........................................................................................20-2
21-1 Determination of Transfer Type ...................................................................................21-24
21-2 Relation Between Parameters and the Name of Response Type...............................21-26
21-3 Response Bit Definition for Each Response Type.......................................................21-27
21-4 The relation between Command CRC Error and Command Timeout Error................21-52
21-5 The Relation Between Command CRC Error and Command Timeout Error..............21-60
21-6 Maximum Current Value Definition ..............................................................................21-63
22-1 25BPP(A:8:8:8) Palette Data Format...........................................................................22-20
22-2 19BPP (A:6:6:6) Palette Data Format..........................................................................22-21
22-3 16BPP(A:5:5:5) Palette Data Format...........................................................................22-21
22-4 Alpha Value Selection Table for Blending ...................................................................22-23
22-5 Relation between VCLK and CLKVAL (Freq. of Video Clock Source=60MHz) ..........22-26
22-6 LCD Signal Muxing Table (RGB and i-80 I/F)..............................................................22-30
23-1 Camera interface signal description ............................................................................23-2
23-2 Video Timing Reference Codes of ITU-656 Format ....................................................23-4
23-3 Sync signal timing requirement....................................................................................23-4
25-1 CODEC clock (CODECLK = 256fs, 384fs, 512fs, 768fs) ............................................25-7
25-2 IIS Clock Mapping Table..............................................................................................25-7
25-3 Register Summary of IIS Interface...............................................................................25-15
26-1 CODEC clock (CODECLK = 256fs, 384fs, 512fs, 768fs) ............................................26-7
26-2 IIS Clock Mapping Table..............................................................................................26-7
27-1 Input Slot 1 Bit Definitions............................................................................................27-7
S3C2450_UM_REV 1.10 xxxv
List of Tables
Table Title Page
Number Number
29-1 Absolute Maximum Rating........................................................................................... 29-1
29-2 Recommended Operating Conditions (400MHz) ........................................................29-2
29-3 Recommended Operating Conditions (533MHz) ........................................................29-3
29-4 Normal I/O PAD DC Electrical Characteristics............................................................29-4
29-5 Special Memory DDR I/O PAD DC Electrical Characteristics.....................................29-5
29-6 USB DC Electrical Characteristics...............................................................................29-6
29-7 RTC OSC DC Electrical Characteristics......................................................................29-6
29-8 Clock Timing Constants...............................................................................................29-23
29-9 SMC Timing Constants................................................................................................29-24
29-10 NFCON Bus Timing Constants....................................................................................29-24
29-11 Memory Interface Timing Constants (SDRAM) ...........................................................29-25
29-12 DMA Controller Module Signal Timing Constants .......................................................29-26
29-13 TFT LCD Controller Module Signal Timing Constants ................................................29-26
29-14 IIS Controller Module Signal Timing Constants(I2S Master Mode Only) ....................29-26
29-15 IIS Controller Module Signal Timing Constants(I2S Slave Mode Only) ...................... 29-27
29-16 IIC BUS Controller Module Signal Timing ...................................................................29-27
29-17 High Speed SPI Interface Transmit/Receive Timing Constants................................. 29-28
29-18 USB Electrical Specifications.......................................................................................29-29
29-19 USB Full Speed Output Buffer Electrical Characteristics ............................................29-30
29-20 USB High Speed Output Buffer Electrical Characteristics...........................................29-30
29-21 High Speed SDMMC Interface Transmit/Receive Timing Constants.......................... 29-30
29-22 PCM Interface Timing..................................................................................................29-31
B-1 GPIO PORT G Configuration.......................................................................................B-4
B-2 DMA Request Sources for Each Channel ...................................................................B-6
B-3 GIB Interrupt Source....................................................................................................B-7
B-4 Special Registers for GIB ............................................................................................B-11
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-1
1 PRODUCT OVERVIEW
1 INTRODUCTION
This user’s manual describes SAMSUNG's S3C2450 16/32-bit RISC microprocessor. SAMSUNG’s S3C2450 is
designed to provide hand-held devices and general applications with low-power, and high-performance micro-
controller solution in small die size. To reduce total system cost, the S3C2450 includes the following components.
The S3C2450 is developed with ARM926EJ core, 65nm CMOS standard cells and a memory complier. Its low-
power, simple, elegant and fully static design is particularly suitable for cost- and power-sensitive applications. It
adopts a new bus architecture known as Advanced Micro controller Bus Architecture (AMBA).
The S3C2450 offers outstanding features with its CPU core, a 16/32-bit ARM926EJ RISC processor designed by
Advanced RISC Machines, Ltd. The ARM926EJ implements MMU, AMBA BUS, and Harvard cache architecture
with separate 16KB instruction and 16KB data caches, each with an 8-word line length.
By providing a complete set of common system peripherals, the S3C2450 minimizes overall system costs and
eliminates the need to configure additional components. The integrated on-chip functions that are described in
this document include:
• Around 400MHz @ 1.3V, 533MHz @ TBDV Core, 1.8V/2.5V/3.0V/3.3V ROM/SRAM, 1.8V/2.5V
mSDR/mDDR/DDR2 SDRAM, 1.8V/2.5V/3.3V external I/O microprocessor with 16KB I/D-Cache/MMU
• External memory controller (mSDR/mDDR/DDR2 SDRAM Control and Chip Select logic) and CF/ATA I/F
controller
• LCD controller (up to 256K color) with LCD-dedicated DMA
• 8-ch DMA controllers with external request pins
• 4-ch UARTs (IrDA1.0, 64-Byte Tx FIFO, and 64-Byte Rx FIFO)
• 2-ch High Speed SPls
• 2 IIC bus interfaces (multi-master support)
• 2 IIS Audio CODEC interfaces (24-bit, port 0 supports 5.1ch, port 1 supports 2ch)
• AC97 CODEC Interface
• 2 High-Speed MMC and SDMMC combo (SD Host 2.0 and MMC protocol 4.2 compatible)
• 2-ch USB Host controller (ver 1.1 Compliant)/1-ch USB Device controller (ver 2.0 Compliant)
• 4-ch PWM timers / 1-ch Internal timer / Watch Dog Timer
• 10-ch 12-bit ADC and Touch screen interface
• RTC with calendar function
• Camera interface (Max. 8M pixels input support. 2M pixel input support for scaling)
• 174 General Purpose I/O ports / 24-ch external interrupt source
• Power control: Normal, Idle, Stop, Deep Stop and Sleep mode
• On-chip clock generator with PLL
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-2
2 FEATURES
2.1.1 Architecture
• Integrated system for hand-held devices and
general embedded applications.
• 16/32-Bit RISC architecture and powerful
instruction set with ARM926EJ CPU core.
• Enhanced ARM architecture MMU to support
WinCE, EPOC 32 and Linux.
• Instruction cache, data cache, write buffer and
Physical address TAG RAM to reduce the effect
of main memory bandwidth and latency on
performance.
• ARM926EJ CPU core supports the ARM debug
architecture.
• Internal Advanced Microcontroller Bus
Architecture (AMBA) (AMBA2.0, AHB/APB).
2.1.2 System Manager
• Little/Big Endian support.
• Two independent memory bus - one for the
ROM/SRAM bus (ROM Bank0~Bank5) and one
for the DRAM bus (mSDR/mDDR/DDR2
SDRAM Bank0~Bank1)
• Address space: 64M bytes for Rom bank0 ~
bank5, 128M bytes for SDRAM bank0 ~ bank1.
• Supports programmable 8/16-bit data bus width
for ROM/SRAM bank and programmable 16/32-
bit data bus width for SDRAM bank
• Fixed bank start address from Rom bank 0 to
bank 5 and SDRAM bank 0 to bank1.
• Eight memory banks:
– Six memory banks for ROM, SRAM, and
others (NAND/CF etc.).
– Two memory banks for Synchronous DRAM.
• Complete Programmable access cycles for all
memory banks.
• Supports external wait signals to expand the bus
cycle.
• Supports self-refresh mode in SDRAM for
power-down.
• Supports various types of ROM for booting
(NOR Flash, EEPROM, OneNAND, IROM and
others).
2.1.3 NAND Flash
• Supports booting from NAND flash memory by
selecting OM as IROM boot mode. (Only 8bit
Nand and 8ECC is supported when it boots)
• 64KB for internal SRAM Buffer(8KB internal
buffer for booting)
• Supports storage memory for NAND flash
memory after booting.
• Supports Advanced NAND flash
2.1.4 Cache Memory
• 64-way set-associative cache with I-Cache
(16KB) and D-Cache (16KB).
• 8words length per line with one valid bit and two
dirty bits per line.
• Pseudo random or round robin replacement
algorithm.
• Write-through or write-back cache operation to
update the main memory.
• The write buffer can hold 16 words of data and
four addresses.
2.1.5 Clock & Power Manager
• On-chip MPLL and EPLL:
EPLL generates the clock to operate USB Host,
IIS, UART, etc.
MPLL generates the clock to operate MCU at
maximum 533MHz @ TBD V.
• Clock can be fed selectively to each function
block by software.
• Power mode: Normal, Idle, Stop, Deep Stop and
Sleep mode
Normal mode: Normal operating mode
Idle mode: The clock for only CPU is stopped.
Stop mode: All clocks are stopped.
Deep Stop mode: CPU power is gated and all
clocks are stopped.
Sleep mode: The Core power including all
peripherals is shut down.
• Woken up by EINT[15:0] or RTC alarm & tick
interrupt from Sleep mode and (Deep)STOP
mode.
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-3
2 FEATURES (Continued)
2.1.6 Interrupt Controller
• 77 Interrupt sources
(One Watch dog timer, 5 timers, 12 UARTs, 24
external interrupts, 8 DMA, 2 RTC, 2 ADC, 2 IIC,
2 SPI, 2 SDI, 2 USB, 4 LCD, 1 Battery Fault, 1
NAND, 1 CF, 1 AC97 and 2 CAM I/F, 2 I2S, 2
PCM, 1 2D)
• Level/Edge mode on external interrupt source
• Programmable polarity of edge and level
• Supports Fast Interrupt request (FIQ) for very
urgent interrupt request
2.1.7 Timer with Pulse Width Modulation (PWM)
• 4-ch 16-bit Timer with PWM / 1-ch 16-bit internal
timer with DMA-based or interrupt-based
operation
• Programmable duty cycle, frequency, and
polarity
• Dead-zone generation
• Supports external clock sources
2.1.8 RTC (Real Time Clock)
• Full clock feature: msec, second, minute, hour,
date, day, month, and year
• 32.768 KHz operation
• Alarm interrupt
• Time tick interrupt
2.1.9 General Purpose Input/Output Ports
• 24 external interrupt ports
• 174 Multiplexed input/output ports
2.1.10 DMA Controller
• 8-ch DMA controller
• Supports memory to memory, IO to memory,
memory to IO, and IO to IO transfers
• Burst transfer mode to enhance the transfer rate
2.1.11 LCD Controller
• Supports 1, 2, 4 or 8 bpp (bit-per-pixel) palette
color displays for color
• Supports 16, 24 bpp non-palette true-color
displays for color
• Supports maximum 16M color at 24 bpp mode
• Supports multiple screen size
– Typical actual screen size: 640x480, 320x240,
160x160, and others.
– Maximum frame buffer size is 4Mbytes.
– Maximum virtual screen size in 64K color
mode: 2048x2048, and others
• Support 2 overlay windows for LCD
2.1.12 Camera Interface
• ITU-R BT 601/656 8-bit mode support
• DZI (Digital Zoom In) capability
• Programmable polarity of video sync signals
• Max. 4096x4096 pixels input support
(2048x2048 pixel input support for scaling)
• Image mirror and rotation (X-axis mirror, Y-axis
mirror, and 180° rotation)
• Camera output format (RGB 16/24-bit and
YCbCr 4:2:0/4:2:2 formats)
2.1.13 UART
• 4-channel UART with DMA-based or interrupt-
based operation
• Supports 5-bit, 6-bit, 7-bit, or 8-bit serial data
transmit/receive (Tx/Rx)
• Supports external clocks for the UART operation
(EXTUARTCLK)
• Programmable baud rate upto 3Mbps
• Supports IrDA 1.0
• Loopback mode for testing
• Each channel has internal 64-byte Tx FIFO and
64-byte Rx FIFO.
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-4
2 FEATURES (Continued)
2.1.14 A/D Converter & Touch Screen Interface
• 10-ch multiplexed ADC
• Max. 500KSPS and 12-bit Resolution
• Internal FET for direct Touch screen interface
2.1.15 Watchdog Timer
• 16-bit Watchdog Timer
• Interrupt request or system reset at time-out
2.1.16 IIC-Bus Interface
• 2-ch Multi-Master IIC-Bus
• Serial, 8-bit oriented and bi-directional data
transfers can be made at up to 100 Kbit/s in
Standard mode or up to 400 Kbit/s in Fast mode.
2.1.17 2D
• Line/Point Drawing
• BitBLT, Color Expansion.
• Maximum 2040*2040 image size
• Window clipping
• 90°/180°/270°/X-flip/Y-flip Rotation
• Totally 256 3-operand Raster Operation (ROP)
• Alpha Blending
• 16/24/32-bpp color format support
• YUV input support (4:2:2, 2-planar)
2.1.18 IIS Multi Audio Interface / IIS-Bus
• 2 ports audio interface with DMA-based
operation.
• Port 0 : up to 5.1ch, three 32bit 16depth Tx
FIFOs, One 32bit 16depth Rx FIFO
• Port 1 : 2ch, 32bit 16depth Tx FIFO, 32bit
16depth Rx FIFO
• Serial, 8-/16-/24- bit per channel data transfers
• Supports IIS format and MSB-justified data
format
2.1.19 AC97 Audio Interface
• 1port AC97 for audio interface with DMA-based
operation
• 16-bit Stereo Audio
2.1.20 PCM Audio Interface
• Mono, 16bit PCM, 2 ports audio interface.
• Master mode only, this block always sources the
main shift clock
• Input (16bit 32depth) and output(16bit 32depth)
FIFOs to buffer data
2.1.21 USB Host
• 2-port USB Host
• Complies with OHCI Rev. 1.0
• Compatible with USB Specification version 1.1
2.1.22 USB Device
• 1-port USB Device
• 9 Endpoints for USB Device
• Compatible with USB Specification version 2.0
2.1.23 SD/MMC Host Interface
• SD Standard Host Spec(ver2.0) compatible
• Dedicated DMA access support
• Compatible with SD Memory Card Protocol
version 2.1
• Compatible with SDIO Card Protocol version 1.0
• Compatible with HS-MMC Protocol version 4.2
• 512 Bytes FIFO for Tx/Rx
• CE-ATA mode support
2.1.24 SPI Interface
• Compatible with 2-ch Serial Peripheral Interface
Protocol version 2.11 (2ch. High speed SPI
interface)
• 2x8 bits Shift register for Tx/Rx
• DMA-based or interrupt-based operation
2.1.25 Operating Voltage Range
• Core: 1.3V for 400MHz
TBD for 533MHz
ROM/SRAM: 1.8V/ 2.5V/3.0V/3.3V
SDRAM: 1.8V/ 2.5V
• I/O: 1.8V/2.5V/3.3V(refer to electrical data)
2.1.26 Operating Frequency
• FCLK Up to 533MHz
• HCLK Up to 133MHz
• PCLK Up to 67MHz
2.1.27 Package
• 400 FBGA 13x13
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-5
3 BLOCK DIAGRAM
Figure 1-1. S3C2450 Block Diagram
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-6
4 PIN ASSIGNMENTS
B
A
D
C
F
E
H
G
K
J
M
L
P
N
T
R
U
W
V
AA
Y
AC
AB
1
2
3
4
5
6
7
8
9
20
22
23
14
15
16
17
18
19
21
10
12
13
11
Bottom View
Figure 1-2. S3C2450 Pin Assignments (400-FBGA) Top view
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-7
Table 1-1. 400-Pin FBGA Pin Assignments − Pin Number Order (1/4)
Pin Pin Name Ball Pin Pin Name Ball Pin Pin Name Ball
1 VDD_SRAM C3 38 CAMVSYNC/GPJ9 K7 75 RGB_VD4/GPC12 R3
2 RSMCLK/GPA23 B2 39 CAMHREF/GPJ10 K2 76 RGB_VD5/GPC13 T2
3 VSS_SRAM D4 40 VSSi L4 77 RGB_VD6/GPC14 T3
4 RSMVAD/GPA24 C2 41 VDDi L3 78 RGB_VD7/GPC15 R7
5 RSMBWAIT/GPM0 B1 42 CAMPCLK/GPJ8 K9 79 RGB_VD8/GPD0 U1
6 nRCS3/GPA14 C1 43 CAMDATA0/GPJ0 K1 80 RGB_VD9/GPD1 R8
7 nRCS4/GPA15 C4 44 CAMDATA1/GPJ1 L8 81 VDDiarm U4
8 nRCS5/GPA16 E4 45 CAMDATA2/GPJ2 L2 82 VSSiarm U2
9 nWAIT D2 46 CAMDATA3/GPJ3 L7 83 RGB_VD10/GPD2 V1
10 FCLE/GPA17 F3 47 VDD_CAM M4 84 RGB_VD11/GPD3 T7
11 FALE/GPA18 D3 48 VSS_CAM L1 85 RGB_VD12/GPD4 U3
12 VDDi D1 49 CAMDATA4/GPJ4 M2 86 RGB_VD13/GPD5 T8
13 VSSi E2 50 CAMDATA5/GPJ5 L9 87 RGB_VD14/GPD6 V2
14 nFWE/GPA19 G4 51 CAMDATA6/GPJ6 M3 88 RGB_VD15/GPD7 V3
15 nFRE/GPA20 E1 52 CAMDATA7/GPJ7 M8 89 RGB_VD16/GPD8 W1
16 nFCE/GPA22 F4 53 VDDiarm M1 90 RGB_VD17/GPD9 W3
17 FRnB/GPM1 F2 54 VSSiarm N4 91 RGB_VD18/GPD10 W2
18 VDD_SRAM F1 55 CAMPCLKOUT/GPJ11 N3 92 VDDiarm V4
19 VSS_SRAM E3 56 CAMRESET/GPJ12 M7 93 VDDiarm Y1
20 RDATA15 H4 57 RGB_LEND/GPC0 N1 94 VSSiarm Y2
21 RDATA14 G2 58 VDDiarm P4 95 VDD_LCD W4
22 RDATA13 G3 59 VSSiarm N2 96 VSS_LCD AA1
23 RDATA12 G1 60 RGB_VCLK/GPC1 M9 97 RGB_VD19/GPD11 Y3
24 RDATA11 H7 61 RGB_HSYNC/GPC2 R4 98 RGB_VD20/GPD12 Y4
25 RDATA10 H2 62 RGB_VDEN/GPC4 N7 99 RGB_VD21/GPD13 AB1
26 RDATA9 J8 63 RGB_VSYNC/GPC3 P3 100 RGB_VD22/GPD14 AB2
27 RDATA8 H3 64 GPC5 N8 101 RGB_VD23/GPD15 AA2
28 RDATA7 J4 65 GPC6 P1 102 TOUT0/GPB0 AC1
29 RDATA6 J3 66 GPC7 N9 103 TOUT1/GPB1 AC2
30 RDATA5 H1 67 RGB_VD0/GPC8 P2 104 TOUT2/GPB2 AB3
31 VDD_SRAM J2 68 VDDiarm T4 105 TOUT3/GPB3 AA3
32 VSS_SRAM J9 69 VSSiarm R1 106 VDDiarm AC3
33 RDATA4 K4 70 RGB_VD1/GPC9 P7 107 VSSiarm AB4
34 RDATA3 J7 71 VSS_LCD R2 108 TCLK/GPB4 AA4
35 RDATA2 K3 72 VDD_LCD P8 109 nXBACK/GPB5 AC4
36 RDATA1 K8 73 RGB_VD2/GPC10 T1 110 nXBREQ/RTCK/GP
B6 Y5
37 RDATA0 J1 74 RGB_VD3/GPC11 P9 111 VDD_OP2 AB5
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-8
Table 1-1. 400-Pin FBGA Pin Assignments − Pin Number Order (2/4)
Pin Pin Name Ball Pin Pin Name Ball Pin Pin Name Ball
112 VSS_OP2 U7 137 VSS_OP2 Y9 162 SS[1]/GPL14 R13
113 nXDACK1/I2CSDA
1/GPB7 AC5 138 EINT20/GPG12/
nINPACK R10 163 SS[0]/GPL13 AC14
114 nXDREQ1/I2CSCL
1/GPB8 AA5 139 EINT21/GPG13/
nREG_CF AC10 164 SPIMISO1/GPL12 Y14
115 nXDACK0/I2SSDO
_1/GPB9 AB6 140 EINT22/GPG14/
RESET_CF T11 165 SPIMOSI1/GPL11 AB14
116 nXDREQ0/I2SSDO
_2/GPB10 U8 141 EINT23/GPG15/
CF_PWREN AA10 166 SPICLK1/GPL10 T14
117 VDDiarm Y6 142 VDDiarm AB11 167 SD1_nWP/GPJ15 AC15
118 VSSiarm Y7 143 VSSiarm Y10 168 SD1_nCD/GPJ14 U14
119 EXTUARTCLK/
GPH12 AC6 144 IICSCL/GPE14 U11 169 SD1_LED/GPJ13/I
2S1_LRCK/PCM1_
FSYNC AA14
120 nCTS0/GPH8 AB7 145 IICSDA/GPE15 AC11 170 SD1_CLK/GPL9 R14
121 nRTS0/GPH9 AA6 146 I2SLRCK/GPE0/
AC_nRESET/PCM0_
FSYNC AA11 171 VSSi Y15
122 TXD0/GPH0 AC7 147
I2SSCLK/GPE1/
AC_SYNC/PCM0_SC
LK Y11 172 VDDi T15
123 RXD0/GPH1 AA7 148
I2SCDCLK/GPE2/
AC_BIT_CLK/PCM0_
CDCLK R11 173 SD1_CMD/GPL8 AB15
124 nCTS1/GPH10 T9 149 I2SSDI/GPE3/
AC_SDI/PCM0_SDI AA12 174 SD1_DAT[0]/GPL0 AC16
125 nRTS1/GPH11 AB8 150 I2SSDO_0/GPE4/
AC_SDO/PCM0_SDO T12 175 SD1_DAT[1]/GPL1 AA15
126 TXD1/GPH2 U9 151 SPIMISO0/GPE11 AC12 176 SD1_DAT[2]/GPL2 U15
127 RXD1/GPH3 AA8 152 SPIMOSI0/GPE12 U12 177 SD1_DAT[3]/GPL3 AA16
128 EINT16/GPG8 R9 153 SPICLK0/GPE13 AB12 178 SD1_DAT[4]/GPL4/
I2S1_SCLK/PCM1
_SCLK R15
129 EINT17/GPG9 AB9 154 VDDi Y12 179 SD1_DAT[5]/GPL5/
I2S1_CDCLK/PCM
1_CDCLK AB16
130 VDDiarm AC8 155 VSSi Y13 180 SD1_DAT[6]/GPL6/
I2S1_SDI/PCM1_S
DI U16
131 VSSiarm Y8 156 VSS_SD R12 181 SD1_DAT[7]/GPL7/
I2S1_SDO/PCM1_
SDO AC17
132 EINT18/CAM_FIEL
D_A/GPG10 T10 157 VDD_SD AC13 182 VDD_SD AA17
133 EINT19/GPG11/
nIREQ_CF AA9 158 TXD2/GPH4 T13 183 VSS_SD AB17
134 VDD_USBOSC U10 159 RXD2/GPH5 AB13 184 SD0_CLK/GPE5 Y16
135 CLKOUT0/GPH13 AC9 160 TXD3/GPH6/nRTS2 U13 185 SD0_CMD/GPE6 AC18
136 CLKOUT1/GPH14 AB10 161 RXD3/GPH7/nCTS2 AA13 186 SD0_DAT[0]/GPE7 Y17
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-9
Table 1-1. 400-Pin FBGA Pin Assignments − Pin Number Order (3/4)
Pin Pin Name Ball Pin Pin Name Ball Pin Pin Name Ball
187 SD0_DAT[1]/GPE8 AB18 228 EINT2/GPF2 R17 269 VDDA33T1 K16
188 SD0_DAT[2]/GPE9 AA18 229 EINT3/GPF3 T23 270 VDDI_UDEV J23
189 SD0_DAT[3]/
GPE10 AC19 230 EINT4/GPF4 P15 271 VSSI_UDEV J21
190 VSSA_MPLL AB19 231 EINT5/GPF5 R22 272 SDATA31/GPK15 J22
191 NC Y18 232 EINT6/GPF6 P16 273 SDATA30/GPK14 K15
192 VDDA_MPLL AC20 233 EINT7/GPF7 T21 274 SDATA29/GPK13 H23
193 VSSA_EPLL AC21 234 PWR_EN R23 275 SDATA28/GPK12 J17
194 EPLLCAP AC22 235 BATT_FLT R20 276 VDD_SDRAM H20
195 VDDA_EPLL AA19 236 NRESET P22 277 VSS_SDRAM J16
196 VSSA_ADC AB20 237 TDO P23 278 SDATA27/GPK11 H22
197 AIN9 AA20 238 TMS R21 279 SDATA26/GPK10 H21
198 AIN8 Y19 239 TDI P17 280 VDDi G23
199 AIN7 AC23 240 TCK P20 281 VSSi H17
200 AIN6 AB21 241 nTRST N15 282 SDATA25/GPK9 G21
201 AIN5 AB22 242 EINT8/GPG0 N22 283 SDATA24/GPK8 F21
202 AIN4 AA22 243 EINT9/GPG1 N16 284 SDATA23/GPK7 G22
203 AIN3 AB23 244 EINT10/GPG2 N23 285 SDATA22/GPK6 F23
204 AIN2 AA21 245 EINT11/GPG3 P21 286 SDATA21/GPK5 E23
205 AIN1 AA23 246 EINT12/GPG4 N20 287 VDD_SDRAM E20
206 AIN0 Y22 247 EINT13/GPG5 N17 288 VSS_SDRAM F22
207 Vref W20 248 EINT14/GPG6 N21 289 SDATA20/GPK4 F20
208 VDDA_ADC Y21 249 EINT15/GPG7 M15 290 SDATA19/GPK3 E21
209 VDD_RTC Y23 250 VDD_OP1 M20 291 SDATA18/GPK2 G20
210 Xtortc V20 251 DP M23 292 SDATA17/GPK1 D23
211 Xtirtc W22 252 DN L23 293 SDATA16/GPK0 E22
212 OM[4] Y20 253 VSS_OP1 M21 294 SDATA15 D21
213 OM[3] U17 254 nRSTOUT M16 295 SDATA14 C23
214 OM[2] W23 255 VDDalive M22 296 VDD_SDRAM C22
215 OM[1] V23 256 VSSalive M17 297 VSS_SDRAM D22
216 OM[0] V22 257 VDDalive L20 298 SDATA13 B23
217 VDDi T16 258 XI_UDEV L21 299 SDATA12 A23
218 VSSi W21 259 XO_UDEV L15 300 SDATA11 C21
219 VSS_OP3 T17 260 VSSA33C L22 301 SDATA10 B22
220 EXTCLK V21 261 VDDA33C L16 302 SDATA9 B21
221 VDD_OP3 U22 262 REXT K23 303 SDATA8 B20
222 VDDalive U20 263 VDDA33T1 K20 304 SDATA7 A22
223 XTIpll R16 264 VSSA33T2 K22 305 SDATA6 A21
224 XTOpll U23 265 DM_UDEV L17 306 SDATA5 D20
225 VSSalive U21 266 VSSA33T2 K21 307 VDD_SDRAM C20
226 EINT0/GPF0 T22 267 DP_UDEV K17 308 VSS_SDRAM D19
227 EINT1/GPF1 T20 268 VSSA33T2 J20 309 SDATA4 A20
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-10
Table 1-1. 400-Pin FBGA Pin Assignments – Pin Number Order (4/4)
Pin Pin Name Ball Pin Pin Name Ball Pin Pin Name Ball
310 SDATA3 B19 341 SADDR3 D15 372 RADDR17/GPA2 G9
311 VSSi C19 342 SADDR4 B13 373 RADDR16/GPA1 A9
312 VDDi A19 343 VDD_SDRAM C13 374 RADDR15 H9
313 SDATA2 B18 344 VSS_SDRAM J13 375 RADDR14 B9
314 SDATA1 D18 345 SADDR5 A13 376 RADDR13 D8
315 SDATA0 C18 346 SADDR6 H13 377 RADDR12 A8
316 VDD_SDRAM G17 347 SADDR7 D14 378 RADDR11 C8
317 VSS_SDRAM A18 348 SADDR8 G12 379 RADDR10 B8
318 DQS1 B17 349 SADDR9 B12 380 VDDi H8
319 DQS0 C17 350 SADDR10 C12 381 VSSi D7
320 DQM3/GPA26 G16 351 SADDR11 A12 382 RADDR9 A7
321 DQM2/GPA25 C16 352 SADDR12 H12 383 RADDR8 C7
322 DQM1 H16 353 VDD_SDRAM D13 384 RADDR7 B7
323 DQM0 A17 354 VSS_SDRAM J12 385 RADDR6 A6
324 nSCS[0] H15 355 SADDR13 D12 386 RADDR5 G8
325 nSCS[1] D17 356 SADDR14 G11 387 VDD_SRAM C6
326 nSWE B16 357 SADDR15 D11 388 VSS_SRAM G7
327 VDD_SDRAM C15 358 VDDi C11 389 RADDR4 B6
328 VSS_SDRAM G15 359 VSSi A11 390 RADDR3 A5
329 SCLK A16 360 nWE_CF/GPA27 B11 391 RADDR2 B5
330 VDD_SDRAM J15 361 nOE_CF/GPA11 H11 392 RADDR1 D6
331 nSCLK B15 362
RADDR25/RDATA
_OEN/GPA10 D10 393 RADDR0/GPA0 C5
332 VSS_SDRAM J14 363 RADDR24/GPA9 C10 394 nRBE1 D5
333 SCKE A15 364 RADDR23/GPA8 J11 395 nRBE0 A4
334 VSSi D16 365 RADDR22/GPA7 A10 396 nROE B4
335 VDDi B14 366 RADDR21/GPA6 G10 397 nRWE A3
336 nSRAS G14 367 RADDR20/GPA5 B10 398 nRCS0 A2
337 nSCAS C14 368 VDD_SRAM H10 399 nRCS1/GPA12 A1
338 SADDR0 H14 369 VSS_SRAM D9 400 nRCS2/GPA13 B3
339 SADDR1 A14 370 RADDR19/GPA4 J10
340 SADDR2 G13 371 RADDR18/GPA3 C9
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-11
Table 1-2. S3C2450 400-Pin FBGA Pin Assignments
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
1 VDD_SRAM VDD_SRAM - P vddtvh_alv
2 RSMCLK/GPA23 RSMCLK -/- O(L) pvhbsudtbrt
3 VSS_SRAM VSS_SRAM - P vssoh_hvt
4 RSMVAD/GPA24 RSMVAD -/- O(H) pvhbsudtbrt
5 RSMBWAIT/GPM0 RSMBWAIT -/- I pvhbsudtbrt
6 nRCS3/GPA14 nRCS3 - O(H) pvhbsudtbrt
7 nRCS4/GPA15 nRCS4 - O(H) pvhbsudtbrt
8 nRCS5/GPA16 nRCS5 -/- O(H) pvhbsudtbrt
9 nWAIT nWAIT - I
pvhbsudtbrtpvisud
crt_hvt
10 FCLE/GPA17 FCLE - O(L) pvhbsudtbrt
11 FALE/GPA18 FALE - O(L) pvhbsudtbrt
12 VDDi VDDi - P vddivh_alv
13 VSSi VSSi - P vssipvh_alv
14 nFWE/GPA19 nFWE - O(H) pvhbsudtbrt
15 nFRE/GPA20 nFRE - O(H) pvhbsudtbrt
16 nFCE/GPA22 nFCE - O(H) pvhbsudtbrt
17 FRnB/GPM1 FRnB - I pvhbsudtbrt
18 VDD_SRAM VDD_SRAM - P vddtvh_alv
19 VSS_SRAM VSS_SRAM - P vsstvh_alv
20 RDATA15 RDATA15 - Hi-z pvhbsudtbrt
21 RDATA14 RDATA14 - Hi-z pvhbsudtbrt
22 RDATA13 RDATA13 - Hi-z pvhbsudtbrt
23 RDATA12 RDATA12 - Hi-z pvhbsudtbrt
24 RDATA11 RDATA11 - Hi-z pvhbsudtbrt
25 RDATA10 RDATA10 - Hi-z pvhbsudtbrt
26 RDATA9 RDATA9 - Hi-z pvhbsudtbrt
27 RDATA8 RDATA8 - Hi-z pvhbsudtbrt
28 RDATA7 RDATA7 - Hi-z pvhbsudtbrt
29 RDATA6 RDATA6 - Hi-z pvhbsudtbrt
30 RDATA5 RDATA5 - Hi-z pvhbsudtbrt
31 VDD_SRAM VDD_SRAM - P vddtvh_alv
32 VSS_SRAM VSS_SRAM - P vsstvh_alv
33 RDATA4 RDATA4 - Hi-z pvhbsudtbrt
34 RDATA3 RDATA3 - Hi-z pvhbsudtbrt
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-12
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
35 RDATA2 RDATA2 - Hi-z pvhbsudtbrt
36 RDATA1 RDATA1 - Hi-z pvhbsudtbrt
37 RDATA0 RDATA0 - Hi-z pvhbsudtbrt
38 CAMVSYNC/GPJ9 GPJ9 -/- I pvhbsudtart
39 CAMHREF/GPJ10 GPJ10 -/- I pvhbsudtart
40 VSSi VSSi - P vddivh_alv
41 VDDi VDDi - P vssipvh_alv
42 CAMPCLK/GPJ8 GPJ8 -/- I pvhbsudtart
43 CAMDATA0/GPJ0 GPJ0 -/- I pvhbsudtart
44 CAMDATA1/GPJ1 GPJ1 -/- I pvhbsudtart
45 CAMDATA2/GPJ2 GPJ2 -/- I pvhbsudtart
46 CAMDATA3/GPJ3 GPJ3 -/- I pvhbsudtart
47 VDD_CAM VDD_CAM - P vddtvh_alv
48 VSS_CAM VSS_CAM - P vsstvh_alv
49 CAMDATA4/GPJ4 GPJ4 -/- I pvhbsudtart
50 CAMDATA5/GPJ5 GPJ5 -/- I pvhbsudtart
51 CAMDATA6/GPJ6 GPJ6 -/- I pvhbsudtart
52 CAMDATA7/GPJ7 GPJ7 -/- I pvhbsudtart
53 VDDiarm VDDiarm - P vddicvlh_alv
54 VSSiarm VSSiarm - P vssicvlh_alv
55 CAMPCLKOUT/GPJ11 GPJ11 -/- I pvhbsudtart
56 CAMRESET/GPJ12 GPJ12 -/- I pvhbsudtart
57 RGB_LEND/GPC0 GPC0 -/- I pvhbsudtart
58 VDDiarm VDDiarm - P vddicvlh_alv
59 VSSiarm VSSiarm - P vssicvlh_alv
60 RGB_VCLK/GPC1 GPC1 -/- I pvhbsudtart
61 RGB_VLINE/GPC2 GPC2 -/- I pvhbsudtart
62 RGB_VDEN/GPC4 GPC4 -/- I pvhbsudtart
63 RGB_VSYNC/GPC3 GPC3 -/- I pvhbsudtart
64 GPC5 GPC5 -/- I pvhbsudtart
65 GPC6 GPC6 -/- I pvhbsudtart
66 GPC7 GPC7 -/- I pvhbsudtart
67 RGB_VD0/GPC8 GPC8 -/- I pvhbsudtart
68 VDDiarm VDDiarm - P vddicvlh_alv
69 VSSiarm VSSiarm - P vssicvlh_alv
70 RGB_VD1/GPC9 GPC9 -/- I pvhbsudtart
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-13
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
71 VSS_LCD VSS_LCD - P vsstvh_alv
72 VDD_LCD VDD_LCD - P vddtvh_alv
73 RGB_VD2/GPC10 GPC10 -/- I pvhbsudtart
74 RGB_VD3/GPC11 GPC11 -/- I pvhbsudtart
75 RGB_VD4/GPC12 GPC12 -/- I pvhbsudtart
76 RGB_VD5/GPC13 GPC13 -/- I pvhbsudtart
77 RGB_VD6/GPC14 GPC14 -/- I pvhbsudtart
78 RGB_VD7/GPC15 GPC15 -/- I pvhbsudtart
79 RGB_VD8/GPD0 GPD0 -/- I pvhbsudtart
80 RGB_VD9/GPD1 GPD1 -/- I pvhbsudtart
81 VDDiarm VDDiarm - P vddicvlh_alv
82 VSSiarm VSSiarm - P vssicvlh_alv
83 RGB_VD10/GPD2 GPD2 -/- I pvhbsudtart
84 RGB_VD11/GPD3 GPD3 -/- I pvhbsudtart
85 RGB_VD12/GPD4 GPD4 -/- I pvhbsudtart
86 RGB_VD13/GPD5 GPD5 -/- I pvhbsudtart
87 RGB_VD14/GPD6 GPD6 -/- I pvhbsudtart
88 RGB_VD15/GPD7 GPD7 -/- I pvhbsudtart
89 RGB_VD16/GPD8 GPD8 -/- I pvhbsudtart
90 RGB_VD17/GPD9 GPD9 -/- I pvhbsudtart
91 RGB_VD18/GPD10 GPD10 -/- I pvhbsudtart
92 VDDiarm VDDiarm - P vddicvlh_alv
93 VDDiarm VDDiarm - P vddicvlh_alv
94 VSSiarm VSSiarm - P vssicvlh_alv
95 VDD_LCD VDD_LCD - P vddtvh_alv
96 VSS_LCD VSS_LCD - P vsstvh_alv
97 RGB_VD19/GPD11 GPD11 -/- I pvhbsudtart
98 RGB_VD20/GPD12 GPD12 -/- I pvhbsudtart
99 RGB_VD21/GPD13 GPD13 -/- I pvhbsudtart
100 RGB_VD22/GPD14 GPD14 -/- I pvhbsudtart
101 RGB_VD23/GPD15 GPD15 -/- I pvhbsudtart
102 TOUT0/GPB0 GPB0 -/- I pvhbsudtart
103 TOUT1/GPB1 GPB1 -/- I pvhbsudtart
104 TOUT2/GPB2 GPB2 -/- I pvhbsudtart
105 TOUT3/GPB3 GPB3 -/- I pvhbsudtart
106 VDDiarm VDDiarm - P vddicvlh_alv
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-14
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
107 VSSiarm VSSiarm - P vssicvlh_alv
108 TCLK/GPB4 GPB4 -/- I pvhbsudtart
109 nXBACK/GPB5 GPB5 -/- I pvhbsudtart
110 nXBREQ/GPB6/RTCK RTCK -/- I pvhbsudtart
111 VDD_OP2 VDD_OP2 - P vddtvh_alv
112 VSS_OP2 VSS_OP2 - P vsstvh_alv
113 nXDACK1/GPB7/I2C_SDA1 GPB7 -/- I pvhbsudtart
114 nXDREQ1/GPB8/I2C_SCL1 GPB8 -/- I pvhbsudtart
115 nXDACK0/GPB9/I2SSDO_1 GPB9 -/- I pvhbsudtart
116 nXDREQ0/GPB10/I2SSDO_2 GPB10 -/- I pvhbsudtart
117 VDDiarm VDDiarm - P vddicvlh_alv
118 VSSiarm VSSiarm - P vssicvlh_alv
119 EXTUARTCLK/GPH12 GPH12 -/- I pvhbsudtart
120 nCTS0/GPH8 GPH8 -/- I pvhbsudtart
121 nRTS0/GPH9 GPH9 -/- I pvhbsudtart
122 TXD0/GPH0 GPH0 -/- I pvhbsudtart
123 RXD0/GPH1 GPH1 -/- I pvhbsudtart
124 nCTS1/GPH10 GPH10 -/- I pvhbsudtart
125 nRTS1/GPH11 GPH11 -/- I pvhbsudtart
126 TXD1/GPH2 GPH2 -/- I pvhbsudtart
127 RXD1/GPH3 GPH3 -/- I pvhbsudtart
128 EINT16/GPG8 GPG8 -/- I pvhbsudtart
129 EINT17/GPG9 GPG9 -/- I pvhbsudtart
130 VDDiarm VDDiarm - P vddicvlh_alv
131 VSSiarm VSSiarm - P vssicvlh_alv
132 EINT18/GPG10/CAM_FIELD_A GPG10 -/- I pvhbsudtart
133 EINT19/nIREQ_CF/GPG11 GPG11 -/-/- I pvhbsudtart
134 VDD_USBOSC VDD_USBOSC - P vddtvh_alv
135 CLKOUT0/GPH13 GPH13 -/- I pvhbsudtart
136 CLKOUT1/GPH14 GPH14 -/- I pvhbsudtart
137 VSS_OP2 VSS_OP2 - P vsstvh_alv
138 EINT20/nINPACK/GPG12 GPG12 -/-/- I pvhbsudtart
139 EINT21/nREG_CF/GPG13 GPG13 -/-/- I pvhbsudtart
140 EINT22/RESET_CF/GPG14 GPG14 -/-/- I pvhbsudtart
141 EINT23/CF_PWREN/GPG15 GPG15 -/-/- I pvhbsudtart
142 VDDiarm VDDiarm - P vddicvlh_alv
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-15
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
143 VSSiarm VSSiarm - P vssicvlh_alv
144 IICSCL/GPE14 GPE14 -/- I pvhbsudtart
145 IICSDA/GPE15 GPE15 -/- I pvhbsudtart
146 I2SLRCK/GPE0/
AC_nRESET/PCM0_FSYNC GPE0 -/-/- I pvhbsudtart
147 I2SSCLK/GPE1/AC_SYNC/
PCM0_SCLK GPE1 -/-/- I pvhbsudtart
148 I2SCDCLK/GPE2/
AC_BIT_CLK0/PCM0_CDCLK GPE2 -/-/- I pvhbsudtart
149 I2SSDI/GPE3/AC_
SDI0/PCM0_SDI GPE3 -/-/- I pvhbsudtart
150 I2SSDO_0/GPE4/AC_SDO0/
PCM0_SDO GPE4 -/-/- I pvhbsudtart
151 SPIMISO0/GPE11 GPE11 -/- I pvhbsudtart
152 SPIMOSI0/GPE12 GPE12 -/- I pvhbsudtart
153 SPICLK0/GPE13 GPE13 -/- I pvhbsudtart
154 VDDi VDDi - P vddivh_alv
155 VSSi VSSi - P vssipvh_alv
156 VSS_SD VSS_SD - P vsstvh_alv
157 VDD_SD VDD_SD - P vddtvh_alv
158 TXD2/GPH4 GPH4 -/- I pvhbsudtart
159 RXD2/GPH5 GPH5 -/- I pvhbsudtart
160 TXD3/GPH6/nRTS2 GPH6 -/-/- I pvhbsudtart
161 RXD3/GPH7/nCTS2 GPH7 -/-/- I pvhbsudtart
162 SS[1]/GPL14 GPL14 -/- I pvhbsudtart
163 SS[0]/GPL13 GPL13 -/- I pvhbsudtart
164 SPIMISO1/GPL12 GPL12 -/- I pvhbsudtart
165 SPIMOSI1/GPL11 GPL11 -/- I pvhbsudtart
166 SPICLK1/GPL10 GPL10 -/- I pvhbsudtart
167 SD1_nWP/GPJ15 GPJ15 -/- I pvhbsudtart
168 SD1_nCD/GPJ14 GPJ14 -/- I pvhbsudtart
169 SD1_LED/GPJ13/I2S1_LRCK/
PCM1_FSYNC GPJ13 -/- I pvhbsudtart
170 SD1_CLK/GPL9 GPL9 -/- I pvhbsudtart
171 VSSi VSSi - P vssipvh_alv
172 VDDi VDDi - P vddivh_alv
173 SD1_CMD/GPL8 GPL8 -/- I pvhbsudtart
174 SD1_DAT[0]/GPL0 GPL0 -/- I pvhbsudtart
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-16
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
175 SD1_DAT[1]/GPL1 GPL1 -/- I pvhbsudtart
176 SD1_DAT[2]/GPL2 GPL2 -/- I pvhbsudtart
177 SD1_DAT[3]/GPL3 GPL3 -/- I pvhbsudtart
178 SD1_DAT[4]/GPL4/I2S1_
SCLK/PCM1_SCLK GPL4 -/- I pvhbsudtart
179 SD1_DAT[5]/GPL5/I2S1_
CDCLK/PCM1_CDCLK GPL5 -/- I pvhbsudtart
180 SD1_DAT[6]/GPL6/I2S1_
SDI/PCM1_SDI GPL6 -/- I pvhbsudtart
181 SD1_DAT[7]/GPL7/I2S1_
SDO/PCM1_SDO GPL7 -/- I pvhbsudtart
182 VDD_SD VDD_SD - P vddtvh_alv
183 VSS_SD VSS_SD - P vsstvh_alv
184 SD0_CLK/GPE5 GPE5 -/-/- I pvhbsudtart
185 SD0_CMD/GPE6 GPE6 -/-/- I pvhbsudtart
186 SD0_DAT[0]/GPE7 GPE7 -/-/- I pvhbsudtart
187 SD0_DAT[1]/GPE8 GPE8 -/-/- I pvhbsudtart
188 SD0_DAT[2]/GPE9 GPE9 -/-/- I pvhbsudtart
189 SD0_DAT[3]/GPE10 GPE10 -/- I pvhbsudtart
190 VSSA_MPLL VSSA_MPLL - P vsstvlh_alv
191 NC NC
192 VDDA_MPLL VDDA_MPLL - P vddtvlh_alv
193 VSSA_EPLL VSSA_EPLL - P vsstvlh_alv
194 UPLLCAP UPLLCAP - AI pvhbr
195 VDDA_EPLL VDDA_EPLL - P vddtvlh_alv
196 VSSA_ADC VSSA_ADC - P
197 AIN9(XP) AIN9 AI vsstvh_alv
198 AIN8(XM) AIN8 - AI pvhbr
199 AIN7(YP) AIN7 - AI pvhbr
200 AIN6(YM) AIN6 - AI pvhbr
201 AIN5 AIN5 - AI pvhbr
202 AIN4 AIN4 - AI pvhbr
203 AIN3 AIN3 - AI pvhbr
204 AIN2 AIN2 - AI pvhbr
205 AIN1 AIN1 - AI pvhbr
206 AIN0 AIN0 - AI pvhbr
207 Vref Vref - AI pvhbr
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-17
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
208 VDDA_ADC VDDA_ADC - P vddtvh_alv
209 VDD_RTC VDD_RTC - P vddrtcvh_alv
210 Xtortc Xtortc - AO pvhsosca
211 Xtirtc Xtirtc - AI pvhsosca
212 OM[4] OM[4] - I pvhbsudtart_alv
213 OM[3] OM[3] - I pvhbsudtart_alv
214 OM[2] OM[2] - I pvhbsudtart_alv
215 OM[1] OM[1] - I pvhbsudtart_alv
216 OM[0] OM[0] - I pvhbsudtart_alv
217 VDDi VDDi - P vddicvlh_alv
218 VSSi VSSi - P vssicvlh_alv
219 VSS_OP3 VSS_OP3 - P vsstvh_alv
220 EXTCLK EXTCLK - I pvhbsudtart
221 VDD_OP3 VDD_OP3 - P vddtvh_alv
222 VDDalive VDDalive - P vddivh_alv
223 XTIpll XTIpll - AI pvhsoscbrt
224 XTOpll XTOpll - AO pvhsoscbrt
225 VSSalive VSSalive - P vssipvh_alv
226 EINT0/GPF0 GPF0 -/- I pvhbsudtart_alv
227 EINT1/GPF1 GPF1 -/- I pvhbsudtart_alv
228 EINT2/GPF2 GPF2 -/- I pvhbsudtart_alv
229 EINT3/GPF3 GPF3 -/- I pvhbsudtart_alv
230 EINT4/GPF4 GPF4 -/- I pvhbsudtart_alv
231 EINT5/GPF5 GPF5 -/- I pvhbsudtart_alv
232 EINT6/GPF6 GPF6 -/- I pvhbsudtart_alv
233 EINT7/GPF7 GPF7 -/- I pvhbsudtart_alv
234 PWR_EN PWR_EN O(L) O(H) pvhbsudtart_alv
235 BATT_FLT BATT_FLT - I pvhbsudtart
236 nRESET nRESET - I pvhbsudtart
237 TDO TDO - O pvhbsudtart
238 TMS TMS - I pvhbsudtart
239 TDI TDI - I pvhbsudtart
240 TCK TCK - I pvhbsudtart
241 nTRST nTRST - I pvhbsudtart
242 EINT8/GPG0 GPG0 -/- I pvhbsudtart_alv
243 EINT9/GPG1 GPG1 -/- I pvhbsudtart_alv
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-18
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
244 EINT10/GPG2 GPG2 -/- I pvhbsudtart_alv
245 EINT11/GPG3 GPG3 -/- I pvhbsudtart_alv
246 EINT12/GPG4 GPG4 -/-/- I pvhbsudtart_alv
247 EINT13/GPG5 GPG5 -/- I pvhbsudtart_alv
248 EINT14/GPG6 GPG6 -/- I pvhbsudtart_alv
249 EINT15/GPG7 GPG7 -/- I pvhbsudtart_alv
250 VDD_OP1 VDD_OP1 - P vddtvh_alv
251 DP DP - AI usb6002x1_t
252 DN DN - AI usb6002x1_t
253 VSS_OP1 VSS_OP1 - P vsstvh_alv
254 nRSTOUT nRSTOUT O(H) O(L) pvhbsudtart
255 VDDalive VDDalive - P vddivh_alv
256 VSSalive VSSalive - P vssivh_alv
257 VDDalive VDDalive - P vddivh_alv
258 XI_UDEV XI_UDEV - I pvhsoscbrt
259 XO_UDEV XO_UDEV - I pvhsoscbrt
260 VSSA33C VSSA33C - P vsstvh_alv
261 VDDA33C VDDA33C - P vddtvh_alv
262 REXT REXT - pvhbr
263 VDDA33T1 VDDA33T1 - P vddtvh_alv
264 VSSA33T2 VSSA33T2 - P vsstvh_alv
265 DM_UDEV DM_UDEV Hi-z pvhtbr
266 VSSA33T2 VSSA33T2 - P vsstvh_alv
267 DP_UDEV DP_UDEV - Hi-z pvhtbr
268 VSSA33T2 VSSA33T2 - P vsstvh_alv
269 VDDA33T1 VDDA33T1 - P vddtvh_alv
270 VDDI_UDEV VDDI_UDEV - P vddivh_usb_alv
271 VSSI_UDEV VSSIP_UDEV - P vssipvh_usb_alv
272 SDATA31/GPK15 SDATA31 - Hi-z pvmbsudtbrt
273 SDATA30/GPK14 SDATA30 - Hi-z pvmbsudtbrt
274 SDATA29/GPK13 SDATA29 - Hi-z pvmbsudtbrt
275 SDATA28/GPK12 SDATA28 - Hi-z pvmbsudtbrt
276 VDD_SDRAM VDD_SDRAM - P vddtvm_alv
277 VSS_SDRAM VSS_SDRAM - P vsstvm_alv
278 SDATA27/GPK11 SDATA27 - Hi-z pvmbsudtbrt
279 SDATA26/GPK10 SDATA26 - Hi-z pvmbsudtbrt
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-19
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
280 VDDi VDDi - P vddivh_alv
281 VSSi VSSi - P vssipvh_alv
282 SDATA25/GPK9 SDATA25 - Hi-z pvmbsudtbrt
283 SDATA24/GPK8 SDATA24 - Hi-z pvmbsudtbrt
284 SDATA23/GPK7 SDATA23 - Hi-z pvmbsudtbrt
285 SDATA22/GPK6 SDATA22 - Hi-z pvmbsudtbrt
286 SDATA21/GPK5 SDATA21 - Hi-z pvmbsudtbrt
287 VDD_SDRAM VDD_SDRAM - P vddtvm_alv
288 VSS_SDRAM VSS_SDRAM - P vsstvm_alv
289 SDATA20/GPK4 SDATA20 - Hi-z pvmbsudtbrt
290 SDATA19/GPK3 SDATA19 - Hi-z pvmbsudtbrt
291 SDATA18/GPK2 SDATA18 - Hi-z pvmbsudtbrt
292 SDATA17/GPK1 SDATA17 - Hi-z pvmbsudtbrt
293 SDATA16/GPK0 SDATA16 - Hi-z pvmbsudtbrt
294 SDATA15 SDATA15 - Hi-z pvmbsudtbrt
295 SDATA14 SDATA14 - Hi-z pvmbsudtbrt
296 VDD_SDRAM VDD_SDRAM - Hi-z vddtvm_alv
297 VSS_SDRAM VSS_SDRAM - Hi-z vsstvm_alv
298 SDATA13 SDATA13 - Hi-z pvmbsudtbrt
299 SDATA12 SDATA12 - Hi-z pvmbsudtbrt
300 SDATA11 SDATA11 - Hi-z pvmbsudtbrt
301 SDATA10 SDATA10 - Hi-z pvmbsudtbrt
302 SDATA9 SDATA9 - Hi-z pvmbsudtbrt
303 SDATA8 SDATA8 - Hi-z pvmbsudtbrt
304 SDATA7 SDATA7 - Hi-z pvmbsudtbrt
305 SDATA6 SDATA6 - Hi-z pvmbsudtbrt
306 SDATA5 SDATA5 - Hi-z pvmbsudtbrt
307 VDD_SDRAM VDD_SDRAM - P vddtvm_alv
308 VSS_SDRAM VSS_SDRAM - P vsstvm_alv
309 SDATA4 SDATA4 - Hi-z pvmbsudtbrt
310 SDATA3 SDATA3 - Hi-z pvmbsudtbrt
311 VSSi VSSi - P vssipvh_alv
312 VDDi VDDi - P vddivh_alv
313 SDATA2 SDATA2 - Hi-z pvmbsudtbrt
314 SDATA1 SDATA1 - Hi-z pvmbsudtbrt
315 SDATA0 SDATA0 - Hi-z pvmbsudtbrt
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-20
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
316 VDD_SDRAM VDD_SDRAM - P vddtvm_alv
317 VSS_SDRAM VSS_SDRAM - P vsstvm_alv
318 DQS1 DQS1 O(L) Hi-z pvmbsudtbrt
319 DQS0 DQS0 O(L) Hi-z pvmbsudtbrt
320 DQM3/GPA26 DQM3 O(H)- O(L) pvmbsudtbrt
321 DQM2/GPA25 DQM2 O(H) O(L) pvmbsudtbrt
322 DQM1 DQM1 O(H) O(L) pvmbsudtbrt
323 DQM0 DQM0 O(H) O(L) pvmbsudtbrt
324 nSCS[0] nSCS[0] O(H) O(H) pvmbsudtbrt
325 nSCS[1] nSCS[1] O(H) O(H) pvmbsudtbrt
326 nSWE nSWE O(H) O(H) pvmbsudtbrt
327 VDD_SDRAM VDD_SDRAM - P vddtvm_alv
328 VSS_SDRAM VSS_SDRAM - P vsstvm_alv
329 SCLK SCLK O(L) O(SCLK) pvmbsudtbrt
330 VDD_SDRAM VDD_SDRAM - P vddtvm_alv
331 nSCLK nSCLK O(H) O(nSCLK) pvmbsudtbrt
332 VSS_SDRAM VSS_SDRAM P vsstvm_alv
333 SCKE SCKE O(L) O(L) pvmbsudtbrt
334 VSSi VSSi - P vssipvh_alv
335 VDDi VDDi - P vddivh_alv
336 nSRAS nSRAS O(H) O(H) pvmbsudtbrt
337 nSCAS nSCAS O(H) O(H) pvmbsudtbrt
338 SADDR0 SADDR0 - O(L) pvmbsudtbrt
339 SADDR1 SADDR1 - O(L) pvmbsudtbrt
340 SADDR2 SADDR2 - O(L) pvmbsudtbrt
341 SADDR3 SADDR3 - O(L) pvmbsudtbrt
342 SADDR4 SADDR4 - O(L) pvmbsudtbrt
343 VDD_SDRAM VDD_SDRAM - P vddtvm_alv
344 VSS_SDRAM VSS_SDRAM - P vsstvm_alv
345 SADDR5 SADDR5 - O(L) pvmbsudtbrt
346 SADDR6 SADDR6 - O(L) pvmbsudtbrt
347 SADDR7 SADDR7 - O(L) pvmbsudtbrt
348 SADDR8 SADDR8 - O(L) pvmbsudtbrt
349 SADDR9 SADDR9 - O(L) pvmbsudtbrt
350 SADDR10 SADDR10 - O(L) pvmbsudtbrt
351 SADDR11 SADDR11 - O(L) pvmbsudtbrt
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-21
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
352 SADDR12 SADDR12 - O(L) pvmbsudtbrt
353 VDD_SDRAM VDD_SDRAM - P vddtvm_alv
354 VSS_SDRAM VSS_SDRAM - P vsstvm_alv
355 SADDR13 SADDR13 - O(L) pvmbsudtbrt
356 SADDR14 SADDR14 - O(L) pvmbsudtbrt
357 SADDR15 SADDR15 - O(L) pvmbsudtbrt
358 VDDi VDDi - P vddivh_alv
359 VSSi VSSi - P vssipvh_alv
360 nWE_CF/GPA27 nWE_CF -/- O(H) pvhbsudtbrt
361 nOE_CF/GPA11 nOE_CF -/- O(H) pvhbsudtbrt
362 RADDR25/RDATA_
OEN/GPA10 RADDR25 -/- O(L) pvhbsudtbrt
363 RADDR24/GPA9 RADDR24 -/- O(L) pvhbsudtbrt
364 RADDR23/GPA8 RADDR23 -/- O(L) pvhbsudtbrt
365 RADDR22/GPA7 RADDR22 -/- O(L) pvhbsudtbrt
366 RADDR21/GPA6 RADDR21 -/- O(L) pvhbsudtbrt
367 RADDR20/GPA5 RADDR20 -/- O(L) pvhbsudtbrt
368 VDD_SRAM VDD_SRAM - P vddtvh_alv
369 VSS_SRAM VSS_SRAM - P vsstvh_alv
370 RADDR19/GPA4 RADDR19 -/- O(L) pvhbsudtbrt
371 RADDR18/GPA3 RADDR18 -/- O(L) pvhbsudtbrt
372 RADDR17/GPA2 RADDR17 -/- O(L) pvhbsudtbrt
373 RADDR16/GPA1 RADDR16 -/- O(L) pvhbsudtbrt
374 RADDR15 RADDR15 -/- O(L) pvhbsudtbrt
375 RADDR14 RADDR14 - O(L) pvhbsudtbrt
376 RADDR13 RADDR13 - O(L) pvhbsudtbrt
377 RADDR12 RADDR12 - O(L) pvhbsudtbrt
378 RADDR11 RADDR11 - O(L) pvhbsudtbrt
379 RADDR10 RADDR10 - O(L) pvhbsudtbrt
380 VDDi VDDi - P vddivh_alv
381 VSSi VSSi - P vssipvh_alv
382 RADDR9 RADDR9 - O(L) pvhbsudtbrt
383 RADDR8 RADDR8 - O(L) pvhbsudtbrt
384 RADDR7 RADDR7 - O(L) pvhbsudtbrt
385 RADDR6 RADDR6 - O(L) pvhbsudtbrt
386 RADDR5 RADDR5 - O(L) pvhbsudtbrt
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-22
Pin
Number Pin
Name Default
Function I/O
State
@Sleep
I/O State
@nRESET I/O
Type
387 VDD_SRAM VDD_SRAM - P vddtvh_alv
388 VSS_SRAM VSS_SRAM - P vsstvh_alv
389 RADDR4 RADDR4 - O(L) pvhbsudtbrt
390 RADDR3 RADDR3 - O(L) pvhbsudtbrt
391 RADDR2 RADDR2 - O(L) pvhbsudtbrt
392 RADDR1 RADDR1 - O(L) pvhbsudtbrt
393 RADDR0/GPA0 RADDR0 -/- O(L) pvhbsudtbrt
394 nRBE1 nRBE1 - O(H) pvhbsudtbrt
395 nRBE0 nRBE0 - O(H) pvhbsudtbrt
396 nROE nROE - O(H) pvhbsudtbrt
397 nRWE nRWE - O(H) pvhbsudtbrt
398 nRCS0 nRCS0 - O(H) pvhbsudtbrt
399 nRCS1/GPA12 nRCS1 - O(H) pvhbsudtbrt
400 nRCS2/GPA13 nRCS2 - O(H) pvhbsudtbrt
NOTES:
1. The @BUS REQ. shows the pin state at the external bus, which is used by the other bus master.
2. ' – ‘ mark indicates the unchanged pin state at Bus Request mode.
3. Hi-z or Pre means Hi-z or early state and it is determined by the setting of MISCCR register.
4. AI/AO means analog input/analog output.
5. P, I, and O mean power, input and output respectively.
6. The I/O state @nRESET shows the pin status in the @nRESET duration below.
nRESET
EXTCLK
@nRESET > 10 cycle4 OSCin
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-23
Table 1-3. I/O Cell Types and Descriptions
Cell Name Ftn. Interface
Voltage CMOS
/Schmitt Retention
IO Pull-up
/Control Pull-down
/Control Driver Strength
Pvhbdc Bi 1.8/2.5/3.3V analog - - - -
Pvhbr Bi 1.8/2.5/3.3V analog - - - -
pvhbsudtart Bi 1.8/2.5/3.3V Schmit Y Y Y 2.6/5.2/7.8/10.5mA
pvhbsudtart_alv Bi 1.8/2.5/3.3V Schmit N Y Y 2.6/5.2/7.8/10.5mA
pvhbsudtbrt Bi 1.8/2.5/3.3V Schmit Y Y Y 3.3/6.6/9.9/13.2mA
pvhckdsrt I 1.8/2.5/3.3V Schmit - N N -
pvhsosca OSC 1.8/2.5/3.3V Schmit - N N X1(2.5/3.3),X2(1.8)
pvhsoscbrt OSC 1.8/2.5/3.3V schmit Y N N X1/X2/X3/X4
Pvhtbr Bi 1.8/2.5/3.3V analog - - - -
pvhtbr00_efuse Bi 1.8/2.5/3.3V analog - - - -
pvmbsudtbrt Bi 1.8/2.5V schmit Y Y Y 4.9/9.8/14.8/19.7mA
usb6002x1_t Bi 1.8/2.5/3.3V
vddicvlh_alv PWR 1.3V
vddivh_alv PWR 1.3V
vddivh_usb_alv PWR 1.2V
vddrtcvh_alv PWR 1.8/2.5/3.3V
vddtvh_alv PWR 1.8/2.5/3.3V
vddtvlh_alv PWR 1.3V
vddtvm_alv PWR 1.8V
vssicvlh_alv GND 0V
vssipvh_alv GND 0V
vssipvh_usb_al
v GND 0V
vsstvh_alv GND 0V
vsstvlh_alv GND 0V
vsstvm_alv GND 0V
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-24
4.1 SIGNAL DESCRIPTIONS
Table 1-4. S3C2450 Signal Descriptions
Signal In/Out Description
Reset, Clock & Power
XTIpll AI Crystal input signals for internal osc circuit.
When OM[0] = 0, XTIpll is used for MPLL CLK source and EPLL CLK
source.
If it isn't used, it has to be Low (0V)
XTOpll AO Crystal output signals for internal osc circuit.
When OM[0] = 0, XTIpll is used for MPLL CLK source and EPLL CLK
source. If it isn't used, it has to be float
NC AI Not connected.
EPLLCAP AI Loop filter capacitor for Extra PLL
XTIrtc AI 32.768 kHz crystal input for RTC. If it isn’t used, it has to be High
(VDD_RTC=3.3V).
XTOrtc AO 32.768 kHz crystal output for RTC. If it isn’t used, it has to be float.
CLKOUT[1:0] O Clock output signal. The CLKSEL of MISCCR(GPIO register) register
configures the clock output mode among the MPLL_CLK, EPLL CLK,
ARMCLK, HCLK, PCLK.
nRESET ST nRESET suspends any operation in progress and places S3C2450 into a
known reset state. For a reset, nRESET must be held to L level for at
least 4 OSCin after the processor power has been stabilized.
nRSTOUT O For external device reset control (nRSTOUT = nRESET & nWDTRST &
SW_RESET) *SW_RESET = nRSTCON of GPIO MISCCR
PWREN O core power on-off control signal
nBATT_FLT I Probe for battery state (Does not wake up at Sleep mode in case of low
battery state). If it isn’t used, it has to be High (3.3V).
OM[4:0] I OM[4:0] set operating modes of S3C2450
Refer to “S3C2450 Operation Mode Description Table”
EXTCLK I External clock source.
When OM[0] = 1, EXTCLK is used for MPLL and EPLL CLK source.
If it isn't used, it has to be Low (0V).
Memory Interface (ROM/SRAM/NAND/CF)
RADDR[25:0] O RADDR[25:0] (Address Bus) outputs the memory address of the
corresponding bank .
RDATA[15:0] IO RDATA[15:0] (Data Bus) inputs data during memory read and outputs
data during memory write. The bus width is programmable among 8/16-
bit.
nRCS[5:0] O nRCS[5:0] (Chip Select) are activated when the address of a memory is
within the address region of each bank. The number of access cycles and
the bank size can be programmed.
nRWE O nRWE (Write Enable) indicates that the current bus cycle is a write cycle.
nROE O nOE (Output Enable) indicates that the current bus cycle is a read cycle.
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-25
Signal In/Out Description
nRBE[1:0] O Upper byte/lower byte enable (In case of 16-bit SRAM)
nWAIT I nWAIT requests to prolong a current bus cycle. As long as nWAIT is L,
the current bus cycle cannot be completed. If nWAIT signal isn’t used in
your system, nWAIT signal must be tied on pull-up resistor.
SDRAM I/F
SADDR[15:0] O SDRAM Address bus
SDATA[31:0] IO SDRAM Data Bus
nSRAS O SDRAM row address strobe
nSCAS O SDRAM column address strobe
nSWE O SDRAM write enable
nSCS[1:0] O SDRAM chip select
DQM[3:0] O SDRAM data mask
DQS[1:0] O mDDR/DDR2 Data Strobe
SCLK O SDRAM clock
nSCLK O mDDR/DDR2 Conversion clock
SCKE O SDRAM clock enable
NAND Flash
FCLE O Command latch enable
FALE O Address latch enable
nFCE O Nand flash chip enable
nFRE O Nand flash read enable
nFWE O Nand flash write enable
FRnB I Nand flash ready/busy
SMC/OneNAND
RSMCLK I/O SMC Clock
RSMVAD O SMC Address Valid
RSMBWAIT O SMC Burst Wait
CF I/F
nOE_CF O CF Output Enable Strobe
nWE_CF O CF Write Enable Strobe
nIREQ_CF I Interrupt request from CF card
nINPACK_CF I Input acknowledge in I/O mode
CardPWR_CF O Card Power Enable
nREG_CF O Register in CF card strobe
RESET_CF O CF card reset
LCD Control Unit
RGB_VD/SYS_VD[23:0] O RGB I/F Video Data: RGB_VD[23:0]
i80 I/F Video DataSYS_VD[17:0]
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-26
Signal In/Out Description
RGB_VCLK/SYS_WR O RGB I/F LCD Clock
i80 I/F Write Enable
RGB_VSYNC/SYS_CS1 O RGB I/F Vertical Sync. Signal
i80 I/F Sub LCD Select
RGB_HSYNC/SYS_CS0 O RGB I/F Horizontal Sync. Signal
i80 I/F Main LCD Select
RGB_VDEN/SYS_RS O RGB I/F Data Enable
i80 I/F Register/ State select
RGB_LEND/SYS_OE O RGB I/F Line End Signal
i80 I/F Output Enable
CAMERA Interface
CAMRESET O Camera interface reset
CAMCLKOUT O Camera interface master clock
CAMPCLK I Camera interface pixel clock
CAMHREF I Camera interface horizontal sync
CAMVSYNC I Camera interface horizontal sync
CAMDATA[7:0] I Camera interface data
CAM_FIELD_A I Interlace field (only used in interlace mode)
Interrupt Control Unit
EINT[23:0] I External interrupt request
External I/F
nXDREQ[1:0] I External DMA request
nXDACK[1:0] O External DMA acknowledge
nXBREQ I nXBREQ (Bus Hold Request) allows another bus master to request
control of the local bus. nXBACK active indicates that bus control has
been granted.
nXBACK O nXBACK (Bus Hold Acknowledge) indicates that the S3C2450 has
surrendered control of the local bus to another bus master.
UART
RXD[3:0] I UART receives data input (ch. 0/1/2)
TXD[3:0] O UART transmits data output (ch. 0/1/2)
nCTS[2:0] I UART clear to send input signal (ch. 0/1)
nRTS[2:0] O UART request to send output signal (ch. 0/1)
EXTUARTCLK I External clock input for UART
TSADC
AIN[9:0] AI ADC input [9:0]. If do not use ADC function, AIN [9] and AIN [7] pins are
tied to VDDA_ADC. Others are tied to GND.
When touch screen device is used, A[6], A[7] , A[8] and A[9] are used as
YM, YP, XM and XP, respectively.
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-27
Signal In/Out Description
Vref AI ADC reference voltage
IIC-Bus
IICSDA IO IIC-bus data
IICSCL IO IIC-bus clock
IICSDA1 IO IIC-bus data
IICSCL1 IO IIC-bus clock
IIS-Multi Audio Interface
I2SLRCK IO IIS-bus channel select clock
I2SSCLK IO IIS-bus serial clock
I2SCDCLK IO CODEC system clock
I2SSDI I IIS-bus serial data input
I2SSDO O IIS-bus serial data output(Front Left, Right)
I2SSDO_1 O IIS-bus serial data output(Front Center, LFE)
I2SSDO_2 O IIS-bus serial data output(Rear Left, Right)
IIS-Bus
I2S1_LRCK IO IIS-bus channel select clock
I2S1_SCLK IO IIS-bus serial clock
I2S1_CDCLK IO CODEC system clock
I2S1_SDI I IIS-bus serial data input
I2S1_SDO O IIS-bus serial data output
AC’97
AC_nRESET IO AC’97 Master H/W Reset
AC_SYNC IO 12.288MHz serial data clock
AC_BIT_CLK0 O 48kHz fixed rate sample sync
AC_SDI0 I Serial, time division multiplexed, AC’97 input stream
AC_SDO0 O Serial, time division multiplexed, AC’97 output stream
PCM
PCM0_SCLK
PCM1_SCLK
O Serial shift clock
PCM0_FSYNC
PCM1_FSYNC
O Serial data indicator and synchronizer
PCM0_SDI
PCM1_SDI
I Serial PCM input data
PCM0_SDO
PCM1_SDO
O Serial PCM output data
PCM0_CDCLK
PCM1_CDCLK
I Optional External Clock source
USB Host
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-28
Signal In/Out Description
DN IO
DATA(–) from USB host. (Need to 15kΩ pull-down)
DP IO DATA(+) from USB host. (Need to 15kΩ pull-down)
USB Device
DM_UDEV IO DATA(–) for USB peripheral.
DP_UDEV IO DATA(+) for USB peripheral.
REXT O External Resistor ( 44.2ohm +/- 1%)
XO_UDEV OSC Crystal output
XI_UDEV OSC Crystal input
SPI
SPIMISO[1:0] IO SPIMISO is the master data input line, when SPI is configured as a
master.
When SPI is configured as a slave, these pins reverse its role.
SPIMOSI[1:0] IO SPIMOSI is the master data output line, when SPI is configured as a
master.
When SPI is configured as a slave, these pins reverse its role.
SPICLK[1:0] IO SPI clock
nSS[1:0] I SPI chip select (only for slave mode)
SDMMC Interface
SD1_DAT[7:0] IO SD1 receive/transmit data
SD1_CMD IO SD1 receive response/ transmit command
SD1_CLK O SD1 clock
SD1_nWP O SD1 Write Protect
SD1_nCD O SD1 Card Detect
SD1_nLED O SD1 LED
SD0_DAT[3:0] IO SD0 receive/transmit data
SD0_CMD IO SD0 receive response/ transmit command
SD0_CLK O SD0 clock
General Port
GPn[173:0] IO General input/output ports, which are multiplexed with other function pins
(some ports are output only).
TIMMER/PWM
TOUT[3:0] O Timer output[3:0]
TCLK I External timer clock input
JTAG TEST LOGIC
nTRST I nTRST (TAP Controller Reset) resets the TAP controller at start.
If debugger is used, A 10K pull-up resistor has to be connected.
If debugger (black ICE) is not used, nTRST pin must be issued by a low
active pulse (Typically connected to nRESET).
TMS I TMS (TAP Controller Mode Select) controls the sequence of the TAP
controller's states.
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-29
Signal In/Out Description
TCK I TCK (TAP Controller Clock) provides the clock input for the JTAG logic.
TDI I TDI (TAP Controller Data Input) is the serial input for test instructions and
data.
TDO O TDO (TAP Controller Data Output) is the serial output for test instructions
and data.
RTCK O Returned Clock
Power
VDDalive P S3C2450 reset block and port status register VDD.
It should be always supplied whether in normal mode or in Sleep mode.
VDDiarm P S3C2450 core logic VDD for ARM core.
VDDi P S3C2450 core logic VDD for Internal block.
VDDA_MPLL P S3C2450 MPLL analog and digital VDD.
VDDA_EPLL P S3C2450 EPLL analog and digital VDD
VDD_SDRAM P S3C2450 SDRAM I/O Power (1.8V/ 2.5V)
VDD_SRAM P S3C2450 ROM/SRAM I/O Power
VDD_OP1 P S3C2450 System I/O Power 1 (1.8 ~ 3.3V)
VDD_OP2 P S3C2450 System I/O Power 2 ( 1.8 ~ 3.3V)
VDD_OP3 P S3C2450 System I/O Power 3 ( 1.8 ~ 3.3V)
VDD_CAM P S3C2450 Camera I/O Power (1.8 ~ 3.3V)
VDD_LCD P S3C2450 LCD I/O Power (1.8 ~ 3.3V)
VDD_SD P S3C2450 SD/MMC I/O Power (1.8 ~ 3.3V)
VDD_RTC P RTC VDD (3.0V, Input range: 1.8 ~ 3.6V)
This pin must be connected to power properly if RTC isn't used.
VDDA_ADC P S3C2450 ADC VDD(3.3V)
VSSi/VSSiarm G S3C2450 core logic VSS
VSSA_MPLL G S3C2450 MPLL analog and digital VSS.
VSSA_EPLL G S3C2450 EPLL analog and digital VSS
VSS_SDRAM G S3C2450 SDRAM I/O Ground
VSS_SRAM G S3C2450 ROM/SRAM I/O Ground
VSS_OP1 G S3C2450 System I/O Ground
VSS_OP2 G S3C2450 System I/O Ground
VSS_OP3 G S3C2450 System I/O Ground
VSS_CAM G S3C2450 Camera I/O Ground
VSS_LCD G S3C2450 LCD I/O Ground
VSS_SD G S3C2450 SD/MMC I/O Ground
VSSA_ADC G S3C2450 ADC VSS
VDD_USBOSC P USB 2.0 Oscillator Power(1.8 ~ 3.3V)
VDDI_UDEV P USB 2.0 PHY Power ( 1.2V)
VSSI_UDEV G USB 2.0 PHY Ground
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-30
Signal In/Out Description
VDDA33C/VDDA33T1 P USB 2.0 PHY Power ( 3.3V)
VSSA33C/VSSA33T2 G USB 2.0 PHY Ground
NOTE: I/O : Input/Output. AI/AO : Analog I/O. ST : Schmitt-trigger. P : Power. G : Ground.
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-31
4.2 S3C2450 OPERATION MODE DESCRIPTION
Table 1-5. S3C2450 Operation Mode Description
OM[4] OM[3] OM[2] OM[1] OM[0] OM[4] OM[3] OM[2] OM[1] OM[0] Operation
Mode
0 X-TAL
0 1 0 0 1 iROM EXTCLK iROM
0 Reserved Reserved
0 1 JTAG JTAG
0 X-TAL
0
1 1
OneNAND
(Muxed) 16-bit EXTCLK
OneNAND
(Muxed)
0 X-TAL
0 1 8-bit EXTCLK
0 X-TAL
1 0
1
1 1
OneNAND/
ROM ROM/
OneNAND
(Demuxed) 16-bit EXTCLK
ROM/
OneNAND
(Demuxed)
* OM[0] selects the clock source of MPLL/EPLL
( You can select different EPLL clock source with that of MPLL by software setting – refer to SYSCON)
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-32
4.3 S3C2450 MEMORY MAP AND BASE ADDRESS OF SPECIAL REGISTERS
4.3.1 Memory Map
SRAM
(64KB)
SDRAM
(nSCS1)
SDRAM
(nSCS0)
SROM
(nRCS5)
SROM
(nRCS4)
SROM
(nRCS3)
SROM
(nRCS2)
SROM
(nRCS1)
SROM
(nRCS0)
Using OneNAND
for boot ROM
SRAM
(8KB)
SDRAM
(nSCS1)
SDRAM
(nSCS0)
SROM
(nRCS5)
SROM
(nRCS4)
ROM
(nRCS3)
SROM
(nRCS2)
SROM
(nRCS1)
Internal
iROM
Using iROM for
boot ROM
MPORT1
MPORT0
0x1800_0000
0x0000_0000
0x0800_0000
0x1000_0000
0x2000_0000
0x2800_0000
0x3000_0000
0x3800_0000
0x40000_0000
SRAM
(64KB)
Figure 1-3. Memory Map
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-33
Table 1-6. Base Address of Special Registers
Address Module Address Module
0x4E00_0000 NFCON 0x5E00_0000 Reserved
0x4D80_0000 CAM I/F 0x5D00_0000 Reserved
0x4D40_8000 2D 0x5C00_0100 PCM1
0x4D00_0000 Reserved 0x5C00_0000 PCM0
0x4C80_0000 LCD 0x5B00_0000 AC97
0x4C00_0000 SYSCON 0x5A00_0000 Reserved
0x4B80_0000 CF Card 0x5900_0000 HS-SPI1
0x4B00_0700 DMA7 0x5800_0000 TSADC
0x4B00_0600 DMA6 0x5700_0000 RTC
0x4B00_0500 DMA5 0x5600_0000 IO Port
0x4B00_0400 DMA4 0x5500_0100 IIS1
0x4B00_0300 DMA3 0x5500_0000 IIS0
0x4B00_0200 DMA2 0x5400_0100 IIC1
0x4B00_0100 DMA1 0x5400_0000 IIC0
0x4B00_0000 DMA0 0x5300_0000 WDT
0x4AC0_0000 HS-MMC0 0x5200_0000 HS-SPI0
0x4A80_0000 HS-MMC1 0x5100_0000 PWM
0x4A00_0000 INTC 0x5000_0000 UART
0x4980_0000 USB Device 0x4F80_0000 Reserved
0x4900_0000 USB HOST 0x4F00_0000 SSMC
0x4880_0000 EBI 0x4E80_0000 MATRIX
0x4800_0000 SDRAM
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-34
Table 1-7. S3C2450 Special Registers
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
DRAM Controller
BANKCFG 0x48000000 0x00099F0D W R/W Mobile DRAM configuration register
BANKCON1 0x48000004 0x00000008 W R/W Mobile DRAM control register
BANKCON2 0x48000008 0x00000008 W R/W Mobile DRAM timing control register
BANKCON3 0x4800000C 0x00000008 W R/W Mobile DRAM (E)MRS Register
REFRESH 0x48000010 0x00000020 W R/W Mobile DRAM refresh control register
TIMEOUT 0x48000014 0x00000000 W R/W Write Buffer Time out control register
MATRIX & EBI
BPRIORITY0 0X4E800000 0x0000_0004 W R/W Matrix Core 0 priority control register
BPRIORITY1 0X4E800004 0x0000_0004 W R/W Matrix Core 1 priority control register
EBICON 0X4E800008 0x0000_0004 W R/W EBI control register
Memory Controllers ( SSMC )
SMBIDCYR0 0x4F000000 0x0000000F W R/W Bank0 idle cycle control register
SMBIDCYR1 0x4F000020 0x0000000F W R/W Bank1 idle cycle control register
SMBIDCYR2 0x4F000040 0x0000000F W R/W Bank2 idle cycle control register
SMBIDCYR3 0x4F000060 0x0000000F W R/W Bank3 idle cycle control register
SMBIDCYR4 0x4F000080 0x0000000F W R/W Bank4 idle cycle control register
SMBIDCYR5 0x4F0000A0 0x0000000F W R/W Bank5 idle cycle control register
SMBWSTRDR0 0x4F000004 0x0000001 W R/W Bank0 read wait state control register
SMBWSTRDR1 0x4F000024 0x0000001F W R/W Bank1 read wait state control register
SMBWSTRDR2 0x4F000044 0x0000001F W R/W Bank2 read wait state control register
SMBWSTRDR3 0x4F000064 0x0000001F W R/W Bank3 read wait state control register
SMBWSTRDR4 0x4F000084 0x0000001F W R/W Bank4 read wait state control register
SMBWSTRDR5 0x4F0000A4 0x0000001F W R/W Bank5 read wait state control register
SMBWSTWRR0 0x4F000008 0x0000001F W R/W Bank0 write wait state control register
SMBWSTWRR1 0x4F000028 0x0000001F W R/W Bank1 write wait state control register
SMBWSTWRR2 0x4F000048 0x0000001F W R/W Bank2 write wait state control register
SMBWSTWRR3 0x4F000068 0x0000001F W R/W Bank3 write wait state control register
SMBWSTWRR4 0x4F000088 0x0000001F W R/W Bank4 write wait state control register
SMBWSTWRR5 0x4F0000A8 0x0000001F W R/W Bank5 write wait state control register
SMBWSTOENR0 0x4F00000C 0x00000002 W R/W Bank0 output enable assertion delay
control register
SMBWSTOENR1 0x4F00002C 0x00000002 W R/W Bank1 output enable assertion delay
control register
SMBWSTOENR2 0x4F00004C 0x00000002 W R/W Bank2 output enable assertion delay
control register
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-35
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
SMBWSTOENR3 0x4F00006C 0x00000002 W R/W Bank3 output enable assertion delay
control register
SMBWSTOENR4 0x4F00008C 0x00000002 W R/W Bank4 output enable assertion delay
control register
SMBWSTOENR5 0x4F0000AC 0x00000002 W R/W Bank5 output enable assertion delay
control register
SMBWSTWENR0 0x4F000010 0x00000002 W R/W Bank0 write enable assertion delay control
register
SMBWSTWENR1 0x4F000030 0x00000002 W R/W Bank1 write enable assertion delay control
register
SMBWSTWENR2 0x4F000050 0x00000002 W R/W Bank2 write enable assertion delay control
register
SMBWSTWENR3 0x4F000070 0x00000002 W R/W Bank3 write enable assertion delay control
register
SMBWSTWENR4 0x4F000090 0x00000002 W R/W Bank4 write enable assertion delay control
register
SMBWSTWENR5 0x4F0000B0 0x00000002 W R/W Bank5 write enable assertion delay control
register
SMBCR0 0x4F000014
- W R/W Bank0 control register
SMBCR1 0x4F000034 0x00303000 W R/W Bank1 control register
SMBCR2 0x4F000054 0x00303010 W R/W Bank2 control register
SMBCR3 0x4F000074 0x00303000 W R/W Bank3 control register
SMBCR4 0x4F000094 0x00303010 W R/W Bank4 control register
SMBCR5 0x4F0000B4 0x00303010 W R/W Bank5 control register
SMBSR0 0x4F000018 0x00000000 W R/W Bank0 status register
SMBSR1 0x4F000038 0x00000000 W R/W Bank1 status register
SMBSR2 0x4F000058 0x00000000 W R/W Bank2 status register
SMBSR3 0x4F000078 0x00000000 W R/W Bank3 status register
SMBSR4 0x4F000098 0x00000000 W R/W Bank4 status register
SMBSR5 0x4F0000B8 0x00000000 W R/W Bank5 status register
SMBWSTBRDR0 0x4F00001C 0x0000001F W R/W Bank0 burst read wait delay control register
SMBWSTBRDR1 0x4F00003C 0x0000001F W R/W Bank1 burst read wait delay control register
SMBWSTBRDR2 0x4F00005C 0x0000001F W R/W Bank2 burst read wait delay control register
SMBWSTBRDR3 0x4F00007C 0x0000001F W R/W Bank3 burst read wait delay control register
SMBWSTBRDR4 0x4F00009C 0x0000001F W R/W Bank4 burst read wait delay control register
SMBWSTBRDR5 0x4F0000BC 0x0000001F W R/W Bank5 burst read wait delay control register
SMBONETYPER 0x4F000100 - W R/W SMC Bank OneNAND type selection
register
SMCSR 0x4F000200 0x00000000 W R/W SMC status register
SMCCR 0x4F000204 0x00000003 W R/W SMC Control register
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-36
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
Interrupt Controller
SRCPND1 0X4A000000 0x00000000 W R/W Interrupt request status
INTMOD1 0X4A000004 0x00000000 W R/W Interrupt mode control
INTMSK1 0X4A000008 0xFFFFFFFF W R/W Interrupt mask control
INTPND1 0X4A000010 0x00000000 W R/W Interrupt request status
INTOFFSET1 0X4A000014 0x00000000 W R Interrupt request source offset
SUBSRCPND 0X4A000018 0xFFFFFFFF W R/W Sub source pending
INTSUBMSK 0X4A00001C 0x00000000 W R/W Interrupt sub mask
PRIORITY_MODE1 0X4A000030 0x00000000 W R/W Priority mode register
PRIORITY_UPDATE1 0X4A000034 0xFFFFFFFF W R/W Priority update register
SRCPND2 0X4A000040 0x00000000 W R/W Interrupt request status 2
INTMOD2 0X4A000044 0x00000000 W R/W Interrupt mode control 2
INTMSK2 0X4A000048 0xFFFFFFFF W R/W Interrupt mask control 2
INTPND2 0X4A000050 0x00000000 W R/W Interrupt request status 2
INTOFFSET2 0X4A000054 0x00000000 W R Interrupt request source offset 2
PRIORITY_MODE2 0X4A000070 0x00000000 W R/W Priority mode register 2
PRIORITY_UPDATE2 0X4A000074 0x0000007F W R/W Priority update register 2
CF Controller
MUX_REG 0x4B801800 0x00000006 R/W Top level control & configuration register
PCCARD_CNFG&STATUS 0x4B801820 0x00000F07 PC card configuration & status register
PCCARD_INTMSK&SRC 0x4B801824 0x00000700 PC card interrupt mask & source regiseter
PCCARD_ATTR 0x4B801828 0x00031909 PC card attribute memory area operation
timing config regiseter
PCCARD_I/O 0x4B80182C 0x00031909 PC card I/O area operation timing config
regiseter
PCCARD_COMM 0x4B801830 0x00031909 PC card common memory area operation
timing config regiseter
ATA_CONTROL 0x4B801900 0x00000002 ATA enable and clock down status
ATA_STATUS 0x4B801904 0x00000000 ATA status
ATA_COMMAND 0x4B801908 0x00000000 ATA command
ATA_SWRST 0x4B80190C 0x00000000 ATA software reset
ATA_IRQ 0x4B801910 0x00000000 ATA interrupt sources
ATA_IRQ_MASK 0x4B801914 0x0000001F ATA interrut mask
ATA_CFG 0x4B801918 0x00000000 ATA configuration for ATA interface
ATA_PIO_TIME 0x4B80192C 0x0001C238 ATA PIO timing
ATA_UDMA_TIME 0x4B801930 0x00000000 ATA UDMA timing
ATA_XFR_NUM 0x4B801934 0x00000000 ATA transfer number
ATA_XFR_CNT 0x4B801938 0x00000000 ATA current transfer count
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-37
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
ATA_TBUF_START 0x4B80193C 0x00000000 ATA start address of track buffer
ATA_TBUF_SIZE 0x4B801940 0x00000000 ATA size of track buffer
ATA_SBUF_START 0x4B801944 0x00000000 ATA start address of source buffer
ATA_SBUF_SIZE 0x4B801948 0x00000000 ATA size of source buffer
ATA_SBUF_START 0x4B801944 0x00000000 ATA start address of source buffer
ATA_SBUF_SIZE 0x4B801948 0x00000000 ATA size of source buffer
ATA_CADR_TBUF 0x4B80194C 0x00000000 ATA current write address of track buffer
ATA_CADR_SBUF 0x4B801950 0x00000000 ATA current read address of source buffer
ATA_PIO_DTR 0x4B801954 0x00000000 ATA PIO device data register
ATA_PIO_FED 0x4B801958 0x00000000 ATA PIO device Feature/Error register
ATA_PIO_SCR 0x4B80195C 0x00000000 ATA PIO sector count register
ATA_PIO_LLR 0x4B801960 0x00000000 ATA PIO device LBA low register
ATA_PIO_LMR 0x4B801964 0x00000000 ATA PIO device LBA middle register
ATA_PIO_LHR 0x4B801968 0x00000000 ATA PIO device LBA high register
ATA_PIO_DVR 0x4B80196C 0x00000000 ATA PIO device register
ATA_PIO_CSD 0x4B801970 0x00000000 ATA PIO device command/status register
ATA_PIO_DAD
ATA_PIO_READY
0x4B801974
0x4B801978
0x00000000 ATA PIO device control/alternate status
register
ATA_PIO_RDATA 0x4B80197C 0x00000000 ATA PIO read data from device data
register
BUS_FIFO_STATUS 0x4B801990 0x00000000 ATA internal AHB FIFO status
ATA_FIFO_STATUS 0x4B801994 0x00000000 ATA internal ATA FIFO status
USB Host Controller
HcRevision 0x49000000 W R/W Control and status group
HcControl 0x49000004 R/W
HcCommonStatus 0x49000008 R/W
HcInterruptStatus 0x4900000C R/W
HcInterruptEnable 0x49000010 R/W
HcInterruptDisable 0x49000014 R/W
HcHCCA 0x49000018 R/W Memory pointer group
HcPeriodCuttentED 0x4900001C R/W
HcControlHeadED 0x49000020 R/W
HcControlCurrentED 0x49000024 R/W
HcBulkHeadED 0x49000028 R/W
HcBulkCurrentED 0x4900002C R/W
HcDoneHead 0x49000030 R/W Frame counter group
HcRmInterval 0x49000034 R/W
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-38
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
HcFmRemaining 0x49000038 R/W
HcFmNumber 0x4900003C R/W
HcPeriodicStart 0x49000040 R/W
HcLSThreshold 0x49000044 R/W
HcRhDescriptorA 0x49000048 R/W Root hub group
HcRhDescriptorB 0x4900004C R/W
HcRhStatus 0x49000050 R/W
HcRhPortStatus1 0x49000054 R/W
HcRhPortStatus2 0x49000058 R/W
DMA
DISRC0 0x4B000000 W R/W DMA 0 initial source
DISRCC0 0x4B000004 R/W DMA 0 initial source control
DIDST0 0x4B000008 R/W DMA 0 initial destination
DIDSTC0 0x4B00000C R/W DMA 0 initial destination control
DCON0 0x4B000010 R/W DMA 0 control
DSTAT0 0x4B000014 R DMA 0 count
DCSRC0 0x4B000018 R DMA 0 current source
DCDST0 0x4B00001C R DMA 0 current destination
DMASKTRIG0 0x4B000020 R/W DMA 0 mask trigger
DMAREQSEL0 0x4B000024 R/W DMA0 Request Selection Register
DISRC1 0x4B000100 W R/W DMA 1 initial source
DISRCC1 0x4B000104 R/W DMA 1 initial source control
DIDST1 0x4B000108 R/W DMA 1 initial destination
DIDSTC1 0x4B00010C R/W DMA 1 initial destination control
DCON1 0x4B000110 R/W DMA 1 control
DSTAT1 0x4B000114 R DMA 1 count
DCSRC1 0x4B000118 R DMA 1 current source
DCDST1 0x4B00011C R DMA 1 current destination
DMASKTRIG1 0x4B000120 R/W DMA 1 mask trigger
DMAREQSEL1 0x4B000124 R/W DMA1 Request Selection Register
DISRC2 0x4B000200 W R/W DMA 2 initial source
DISRCC2 0x4B000204 R/W DMA 2 initial source control
DIDST2 0x4B000208 R/W DMA 2 initial destination
DIDSTC2 0x4B00020C R/W DMA 2 initial destination control
DCON2 0x4B000210 R/W DMA 2 control
DSTAT2 0x4B000214 R DMA 2 count
DCSRC2 0x4B000218 R DMA 2 current source
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-39
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
DCDST2 0x4B00021C R DMA 2 current destination
DMASKTRIG2 0x4B000220 R/W DMA 2 mask trigger
DMAREQSEL2 0x4B000224 R/W DMA2 Request Selection Register
DISRC3 0x4B000300 W R/W DMA 3 initial source
DISRCC3 0x4B000304 R/W DMA 3 initial source control
DIDST3 0x4B000308 R/W DMA 3 initial destination
DIDSTC3 0x4B00030C R/W DMA 3 initial destination control
DCON3 0x4B000310 R/W DMA 3 control
DSTAT3 0x4B000314 R DMA 3 count
DCSRC3 0x4B000318 R DMA 3 current source
DCDST3 0x4B00031C R DMA 3 current destination
DMASKTRIG3 0x4B000320 R/W DMA 3 mask trigger
DMAREQSEL3 0x4B000324 R/W DMA3 Request Selection Register
DISRC4 0x4B000400 W R/W DMA 4 initial source
DISRCC4 0x4B000404 R/W DMA 4 initial source control
DIDST4 0x4B000408 R/W DMA 4 initial destination
DIDSTC4 0x4B00040C R/W DMA 4 initial destination control
DCON4 0x4B000410 R/W DMA 4 control
DSTAT4 0x4B000414 R DMA 4 count
DCSRC4 0x4B000418 R DMA 4 current source
DCDST4 0x4B00041C R DMA 4 current destination
DMASKTRIG4 0x4B000420 R/W DMA 4 mask trigger
DMAREQSEL4 0x4B000424 R/W DMA4 Request Selection Register
DISRC5 0x4B000500 W R/W DMA 5 initial source
DISRCC5 0x4B000504 R/W DMA 5 initial source control
DIDST5 0x4B000508 R/W DMA 5 initial destination
DIDSTC5 0x4B00050C R/W DMA 5 initial destination control
DCON5 0x4B000510 R/W DMA 5 control
DSTAT5 0x4B000514 R DMA 5 count
DCSRC5 0x4B000518 R DMA 5 current source
DCDST5 0x4B00051C R DMA 5 current destination
DMASKTRIG5 0x4B000520 R/W DMA 5 mask trigger
DMAREQSEL5 0x4B000524 R/W DMA5 Request Selection Register
DISRC6 0x4B000600 W R/W DMA 6 initial source
DISRCC6 0x4B000604 R/W DMA 6 initial source control
DIDST6 0x4B000608 R/W DMA 6 initial destination
DIDSTC6 0x4B00060C R/W DMA 6 initial destination control
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-40
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
DCON6 0x4B000610 R/W DMA 6 control
DSTAT6 0x4B000614 R DMA 6 count
DCSRC6 0x4B000618 R DMA 6 current source
DCDST6 0x4B00061C R DMA 6 current destination
DMASKTRIG6 0x4B000620 R/W DMA 6 mask trigger
DMAREQSEL6 0x4B000624 R/W DMA 6 Request Selection Register
DISRC7 0x4B000700 W R/W DMA 7 initial source
DISRCC7 0x4B000704 R/W DMA 7 initial source control
DIDST7 0x4B000708 R/W DMA 7 initial destination
DIDSTC7 0x4B00070C R/W DMA 7 initial destination control
DCON7 0x4B000710 R/W DMA 7 control
DSTAT7 0x4B000714 R DMA 7 count
DCSRC7 0x4B000718 R DMA 7 current source
DCDST7 0x4B00071C R DMA 7 current destination
DMASKTRIG7 0x4B000720 R/W DMA 7 mask trigger
DMAREQSEL7 0x4B000724 R/W DMA 7 Request Selection Register
System Controller
LOCKCON0 0x4C00_0000 0x0000_FFFF W R/W MPLL lock time count register
LOCKCON1 0x4C00_0004 0x0000_FFFF EPLL lock time count register
OSCSET 0x4C00_0008 0x0000_8000 Oscillator stabilization control register
MPLLCON 0x4C00_0010 0x0185_40C0 MPLL configuration register
EPLLCON 0x4C00_0018 0x0120_0102 EPLL configuration register
EPLLCON_K 0x4C00_001C 0x0000_0000 EPLL configuration register
for K Value
CLKSRC 0x4C00_0020 0x0000_0000 Clock source control register
CLKDIV0 0x4C00_0024 0x0000_000C Clock divider ratio control register0
CLKDIV1 0x4C00_0028 0x0000_0000 Clock divider ratio control register1
CLKDIV2 0x4C00_002C 0x0000_0000 Clock divider ratio control register2
HCLKCON 0x4C00_0030 0xFFFF_FFFF HCLK enable register
PCLKCON 0x4C00_0034 0xFFFF_FFFF PCLK enable register
SCLKCON 0x4C00_0038 0xFFFF_DFFF Special clock enable register
PWRMODE 0x4C00_0040 0x0000_0000 Power mode control register
SWRST 0x4C00_0044 0x0000_0000 Software reset control register
BUSPRI0 0x4C00_0050 0x0000_0000 Bus priority control register 0
PWRCFG 0x4C00_0060 0x0000_0000 Power management configuration register
RSTCON 0x4C00_0064 0x0006_0101 R Reset control register
RSTSTAT 0x4C00_0068 0x0000_0001 R/W Reset status register
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-41
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
WKUPSTAT 0x4C00_006C 0x0000_0000 Wake-up status register
INFORM0 0x4C00_0070 0x0000_0000 R SLEEP mode information register 0
INFORM1 0x4C00_0074 0x0000_0000 R/W SLEEP mode information register 1
INFORM2 0x4C00_0078 0x0000_0000 SLEEP mode information register 2
INFORM3 0x4C00_007C 0x0000_0000 SLEEP mode information register 3
PHYCTRL 0x4C00_0080 0x0000_0000 USB PHY control register
PHYPWR 0x4C00_0084 0x0000_0000 USB PHY power control register
URSTCON 0x4C00_0088 0x0000_0000 USB PHY Reset control register
UCLKCON 0x4C00_008C 0x0000_0000 USB PHY clock control register
LCD Controller
VIDCON0 0x4C80_0000 0x0000_0000 W R/W Video control 0 register
VIDCON1 0x4C80_0004 0x0000_0000 W R/W Video control 1 register
VIDTCON0 0x4C80_0008 0x0000_0000 W R/W Video time control 0 register
VIDTCON1 0x4C80_000C 0x0000_0000 W R/W Video time control 1 register
VIDTCON2 0x4C80_0010 0x0000_0000 W R/W Video time control 2 register
WINCON0 0x4C80_0014 0x0000_0000 W R/W Window control 0 register
WINCON1 0x4C80_0018 0x0000_0000 W R/W Window control 1 register
VIDOSD0A 0x4C80_0028 0x0000_0000 W R/W Video Window 0’s position control register
VIDOSD0B 0x4C80_002C 0x0000_0000 W R/W Video Window 0’s position control register
VIDOSD1A 0x4C80_0034 0x0000_0000 W R/W Video Window 1’s position control register
VIDOSD1B 0x4C80_0038 0x0000_0000 W R/W Video Window 1’s position control register
VIDOSD1C 0x4C80_003C 0x0000_0000 W R/W Video Window 1’s alpha value register
VIDW00ADD0B0 0x4C80_0064 0x0000_0000 W R/W Window 0’s buffer start address register,
buffer 0
VIDW00ADD0B1 0x4C80_0068 0x0000_0000 W R/W Window 0’s buffer start address register,
buffer 1
VIDW01ADD0 0x4C80_006C 0x0000_0000 W R/W Window 1’s buffer start address register
VIDW00ADD1B0 0x4C80_007C 0x0000_0000 W R/W Window 0’s buffer end address register,
buffer 0
VIDW00ADD1B1 0x4C80_0080 0x0000_0000 W R/W Window 0’s buffer end address register,
buffer 1
VIDW01ADD1 0x4C80_0084 0x0000_0000 W R/W Window 1’s buffer end address register
VIDW00ADD2B0 0x4C80_0094 0x0000_0000 W R/W Window 0’s buffer size register, buffer 0
VIDW00ADD2B1 0x4C80_0098 0x0000_0000 W R/W Window 0’s buffer size register, buffer 1
VIDW01ADD2 0x4C80_009C 0x0000_0000 W R/W Window 1’s buffer size register
VIDINTCON 0x4C80_00AC 0x03F0_0000 W R/W Indicate the Video interrupt control register
W1KEYCON0 0x4C80_00B0 0x0000_0000 W R/W Color key control register
W1KEYCON1 0x4C80_00B4 0x0000_0000 W R/W Color key value (transparent value) register
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-42
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
W2KEYCON0 0x4C80_00B8 0x0000_0000 W R/W Color key control register
W2KEYCON1 0x4C80_00BC 0x0000_0000 W R/W Color key value (transparent value) register
W3KEYCON0 0x4C80_00C0 0x0000_0000 W R/W Color key control register
W3KEYCON1 0x4C80_00C4 0x0000_0000 W R/W Color key value (transparent value) register
W4KEYCON0 0x4C80_00C8 0x0000_0000 W R/W Color key control register
W4KEYCON1 0x4C80_00CC 0x0000_0000 W R/W Color key value (transparent value) register
WIN0MAP 0x4C80_00D0 0x0000_0000 W R/W Window color control
WIN1MAP 0x4C80_00D4 0x0000_0000 W R/W Window color control
WPALCON 0x4C80_00E4 0x0000_0000 W R/W Window Palette control register
SYSIFCON0 0x4C80_0130 0x0000_0000 W R/W System Interface control for Main LDI
SYSIFCON1 0x4C80_0134 0x0000_0000 W R/W System Interface control for Sub LDI
DITHMODE 0x4C80_0138 0x0000_0000 W R/W Dithering mode register.
SIFCCON0 0x4C80_013C 0x0000_0000 W R/W System interface command control
SIFCCON1 0x4C80_0140 0x0000_0000 W R/W SYS IF command data write control
SIFCCON2 0x4C80_0144 0x0000_0000 W R SYS IF command data read control
CPUTRIGCON2 0x4C80_0160 0x0000_0000 W R/W CPU trigger source mask
WIN0 Palette RAM 0x4C80_0400~
0x4C80_07FC
Undefined W R/W Window 0’s palette entry 0~255 address
WIN1 Palette RAM 0x4C80_0800~
0x4C80_0BFC
Undefined W R/W Window 0’s palette entry 0~255 address
NAND Flash
NFCONF 0x4E000000 0x*000100* W R/W Configuration register
NFCONT 0x4E000004 0x000100C6 W R/W Control register
NFCMMD 0x4E000008 0x00000000 W R/W Command register
NFADDR 0x4E00000C 0x00000000 W R/W Address register
NFDATA 0x4E000010 - B/W R/W Data register
NFMECCD0 0x4E000014 0x00000000 W R/W 1st and 2nd main ECC data register
NFMECCD1 0x4E000018 0x00000000 W R/W 3rd and 4th main ECC data register
NFSECCD 0x4E00001C 0x00000000 W R/W Spare ECC read register
NFSBLK 0x4E000020 0x00000000 W R/W Programmable start block address register
NFEBLK 0x4E000024 0x00000000 W R/W Programmable end block address register
NFSTAT 0x4E000028 0x0080001D W R NAND status registet
NFECCERR0 0x4E00002C - W R ECC error status0 register
NFECCERR1 0x4E000030 0x00000000 W R ECC error status1 register
NFMECC0 0x4E000034 - W R Generated ECC status0 register
NFMECC1 0x4E000038 - W R Generated ECC status1 register
NFSECC 0x4E00003C - W R Generated Spare area ECC status register
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-43
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
NFMLCBITPT 0x4E000040 0x00000000 W R 4-bit ECC error bit pattern register
NF8ECCERR0 0x4E000044 0x40000000 W R 8bit ECC error status0 register
NF8ECCERR1 0x4E000048 0x00000000 W R 8bit ECC error status1 register
NF8ECCERR2 0x4E00004C 0x00000000 W R 8bit ECC error status2 register
NFM8ECC0 0x4E000050 - W R Generated 8-bit ECC status0 register
NFM8ECC1 0x4E000054 - W R Generated 8-bit ECC status1 register
NFM8ECC2 0x4E000058 - W R Generated 8-bit ECC status2 register
NFM8ECC3 0x4E00005C - W R Generated 8-bit ECC status3 register
NFMLC8BITPT0 0x4E000060 0x00000000 W R 8-bit ECC error bit pattern 0 register
NFMLC8BITPT1 0x4E000064 0x00000000 W R 8-bit ECC error bit pattern 1 register
Camera Interface
CISRCFMT 0x4D80_0000 ← W RW Input source format
CIWDOFST 0x4D80_0004 Window offset register
CIGCTRL 0x4D80_0008 Global control register
CIDOWSFT2 0x4D80_0014 Window option register 2
CICOYSA1 0x4D80_0018 Y 1st frame start address for codec DMA
CICOYSA2 0x4D80_001C Y 2nd frame start address for codec DMA
CICOYSA3 0x4D80_0020 Y 3rd frame start address for codec DMA
CICOYSA4 0x4D80_0024 Y 4th frame start address for codec DMA
CICOCBSA1 0x4D80_0028 Cb 1st frame start address for codec DMA
CICOCBSA2 0x4D80_002C Cb 2nd frame start address for codec DMA
CICOCBSA3 0x4D80_0030 Cb 3rd frame start address for codec DMA
CICOCBSA4 0x4D80_0034 Cb 4th frame start address for codec DMA
CICOCRSA1 0x4D80_0038 Cr 1st frame start address for codec DMA
CICOCRSA2 0x4D80_003C Cr 2nd frame start address for codec DMA
CICOCRSA3 0x4D80_0040 Cr 3rd frame start address for codec DMA
CICOCRSA4 0x4D80_0044 Cr 4th frame start address for codec DMA
CICOTRGFMT 0x4D80_0048 Target image format of codec DMA
CICOCTRL 0x4D80_004C Codec DMA control related
CICOSCPRERATIO 0x4D80_0050 Codec pre-scaler ratio control
CICOSCPREDST 0x4D80_0054 Codec pre-scaler destination format
CICOSCCTRL 0x4D80_0058 Codec main-scaler control
CICOTAREA 0x4D80_005C Codec scaler target area
CICOSTATUS 0x4D80_0064 Codec path status
CIPRCLRSA1 0x4D80_006C RGB 1st frame start address for preview
DMA
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-44
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
CIPRCLRSA2 0x4D80_0070 RGB 2nd frame start address for preview
DMA
CIPRCLRSA3 0x4D80_0074 RGB 3rd frame start address for preview
DMA
CIPRCLRSA4 0x4D80_0078 RGB 4th frame start address for preview
DMA
CIPRTRGFMT 0x4D80_007C Target image format of preview DMA
CIPRCTRL 0x4D80_0080 Preview DMA control related
CIPRSCPRERATIO 0x4D80_0084 Preview pre-scaler ratio control
CIPRSCPREDST 0x4D80_0088 Preview pre-scaler destination format
CIPRSCCTRL 0x4D80_008C Preview main-scaler control
CIPRTAREA 0x4D80_0090 Preview scaler target area
CIPRSTATUS 0x4D80_0098 Preview path status
CIIMGCPT 0x4D80_00A0 Image capture enable command
CICOCPTSEQ 0x4D80_00A4 Codec dma capture sequence related
CICOSCOS 0x4D80_00A8 Codec scan line offset related
CIIMGEFF 0x4D80_00B0 Image Effects related
CIMSYSA 0x4D80_00B4 MSDMA Y start address related
CIMSCBSA 0x4D80_00B8 MSDMA Cb start address related
CIMSCRSA 0x4D80_00BC MSDMA Cr start address related
CIMSYEND 0x4D80_00C0 MSDMA Y end address related
CIMSCBEND 0x4D80_00C4 MSDMA Cb end address related
CIMSCREND 0x4D80_00C8 MSDMA Cr end address related
CIMSYOFF 0x4D80_00CC MSDMA Y offset related
CIMSCBOFF 0x4D80_00D0 MSDMA Cb offset related
CIMSCROFF 0x4D80_00D4 MSDMA Cr offset related
CIMSWIDTH 0x4D80_00D8 MSDMA source image width related
CIMSCTRL 0x4D80_00DC MSDMA control register
UART
ULCON0 0x50000000 W R/W UART 0 line control
UCON0 0x50000004 UART 0 control
UFCON0 0x50000008 UART 0 FIFO control
UMCON0 0x5000000C UART 0 modem control
UTRSTAT0 0x50000010 R UART 0 Tx/Rx status
UERSTAT0 0x50000014 UART 0 Rx error status
UFSTAT0 0x50000018 UART 0 FIFO status
UMSTAT0 0x5000001C UART 0 modem status
UTXH0 0x50000020 B W UART 0 transmission hold
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-45
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
URXH0 0x50000024 R UART 0 receive buffer
UBRDIV0 0x50000028 W R/W UART 0 baud rate divisor
UDIVSLOT0 0x5000002C Baud rate divisior(decimal place)
register 0
ULCON1 0x50004000 UART 1 line control
UCON1 0x50004004 UART 1 control
UFCON1 0x50004008 UART 1 FIFO control
UMCON1 0x5000400C UART 1 modem control
UTRSTAT1 0x50004010 R UART 1 Tx/Rx status
UERSTAT1 0x50004014 UART 1 Rx error status
UFSTAT1 0x50004018 UART 1 FIFO status
UMSTAT1 0x5000401C UART 1 modem status
UTXH1 0x50004020 B W UART 1 transmission hold
URXH1 0x50004024 R UART 1 receive buffer
UBRDIV1 0x50004028 W R/W UART 1 baud rate divisor
UDIVSLOT1 0x500402C Baud rate divisior(decimal place)
register 1
ULCON2 0x50008000 UART 2 line control
UCON2 0x50008004 UART 2 control
UFCON2 0x50008008 UART 2 FIFO control
UTRSTAT2 0x50008010 R UART 2 Tx/Rx status
UERSTAT2 0x50008014 UART 2 Rx error status
UFSTAT2 0x50008018 UART 2 FIFO status
UTXH2 0x50008020 B W UART 2 transmission hold
URXH2 0x50008024 R UART 2 receive buffer
UBRDIV2 0x50008028 W R/W UART 2 baud rate divisor
UDIVSLOT2 0x500802C Baud rate divisior(decimal place)
register 2
ULCON3 0x5000C000 UART 3 line control
UCON3 0x5000C004 UART 3 control
UFCON3 0x5000C008 UART 3 FIFO control
UTRSTAT3 0x5000C010 R UART 3 Tx/Rx status
UERSTAT3 0x5000C014 UART 3 Rx error status
UFSTAT3 0x5000C018 UART 3 FIFO status
UTXH3 0x5000C020 B W UART 3 transmission hold
URXH3 0x5000C024 R UART 3 receive buffer
UBRDIV3 0x5000C028 W R/W UART 3 baud rate divisor
UDIVSLOT3 0x500C02C Baud rate divisior(decimal place) register 3
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-46
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
PWM Timer
TCFG0 0x51000000 0x0 W R/W Timer configuration
TCFG1 0x51000004 0x0 W R/W Timer configuration
TCON 0x51000008 0x0 W R/W Timer control
TCNTB0 0x5100000C 0x0 W R/W Timer count buffer 0
TCMPB0 0x51000010 0x0 W R/W Timer compare buffer 0
TCNTO0 0x51000014 0x0 W R Timer count observation 0
TCNTB1 0x51000018 0x0 W R/W Timer count buffer 1
TCMPB1 0x5100001C 0x0 W R/W Timer compare buffer 1
TCNTO1 0x51000020 0x0 W R Timer count observation 1
TCNTB2 0x51000024 0x0 W R/W Timer count buffer 2
TCMPB2 0x51000028 0x0 W R/W Timer compare buffer 2
TCNTO2 0x5100002C 0x0 W R Timer count observation 2
TCNTB3 0x51000030 0x0 W R/W Timer count buffer 3
TCMPB3 0x51000034 0x0 W R/W Timer compare buffer 3
TCNTO3 0x51000038 0x0 W R Timer count observation 3
TCNTB4 0x5100003C 0x0 W R/W Timer count buffer 4
TCNTO4 0x51000040 0x0 W R Timer count observation 4
USB Device
IR 0x4980_0000 0x0 R/W Index Register
EIR 0x4980_0004 0x0 R/W Endpoint Interrupt Register
EIER 0x4980_0008 0x0 R/W Endpoint Interrupt Enable Register
FAR 0x4980_000C 0x0 R Function Address Register
EDR 0x4980_0014 0x0 R/W Endpoint Direction Register
TR 0x4980_0018 0x0 R/W Test Register
SSR 0x4980_001C 0x0 R/W System Status Register
SCR 0x4980_0020 0x0 R/W System Control Register
EP0SR 0x4980_0024 0x0 R/W EP0 Status Register
EP0CR 0x4980_0028 0x0 R/W EP0 Control Register
EP0BR 0x4980_0060 0x0 R/W EP0 Buffer Register
EP1BR 0x4980_0064 0x0 R/W EP1 Buffer Register
EP2BR 0x4980_0068 0x0 R/W EP2 Buffer Register
EP3BR 0x4980_006C 0x0 R/W EP3 Buffer Register
EP4BR 0x4980_0070 0x0 R/W EP4 Buffer Register
EP5BR 0x4980_0074 0x0 R/W EP5 Buffer Register
EP6BR 0x4980_0078 0x0 R/W EP6 Buffer Register
EP7BR 0x4980_007C 0x0 R/W EP7 Buffer Register
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-47
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
EP8BR 0x4980_0080 0x0 R/W EP8 Buffer Register
FCON 0x4980_0100 0x0 R/W Burst FIFO-DMA Control
FSTAT 0x4980_0104 0x0 R Burst FIFO status
ESR 0x4980_002C 0x0 R/W Endpoints Status Register
ECR 0x4980_0030 0x0 R/W Endpoints Control Register
BRCR 0x4980_0034 0x0 R Byte Read Count Register
BWCR 0x4980_0038 0x0 R/W Byte Write Count Register
MPR 0x4980_003C 0x0 R/W Max Packet Register
DCR 0x4980_0040 0x0 R/W DMA Control Register
DTCR 0x4980_0044 0x0 R/W DMA Transfer Counter Register
DFCR 0x4980_0048 0x0 R/W DMA FIFO Counter Register
DTTCR1 0x4980_004C 0x0 R/W DMA Total Transfer Counter1 Register
DTTCR2 0x4980_0050 0x0 R/W DMA Total Transfer Counter2 Register
MICR 0x4980_0084 0x0 R/W Master Interface Control Register
MBAR 0x4980_0088 0x0 R/W Memory Base Address Register
MCAR 0x4980_008C 0x0 R Memory Current Address Register
Watchdog Timer
WTCON 0x53000000 0x0000_8021 W R/W Watchdog timer mode
WTDAT 0x53000004 0x0000_8000 Watchdog timer data
WTCNT 0x53000008 0x0000_8000 Watchdog timer count
IIC
IICCON0 0x54000000 W R/W IIC0 control
IICSTAT0 0x54000004 IIC0 status
IICADD0 0x54000008 IIC0 address
IICDS0 0x5400000C IIC0 data shift
IICLC0 0x54000010 IIC0 multi-master line control
IICCON1 0x54000100 W R/W IIC1 control
IICSTAT1 0x54000104 IIC1 status
IICADD1 0x54000108 IIC1 address
IICDS1 0x5400010C IIC1 data shift
IICLC1 0x54000110 IIC1multi-master line control
IIS Multi Audio Interface
IISCON 0x55000000 0xC600 W R/W IIS control
IISMOD 0x55000004 0x0 IIS mode
I2SFIC 0x55000008 0x0 I2S interface FIFO control register
I2SPSR 0x5500000C 0x0 I2S interface clock divider control register
I2STXD 0x55000010 0x0 W I2S interface transmit data register
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-48
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
I2SRXD 0x55000014 0x0 R I2S interface receive data register
IIS
IISCON 0x55000100 0x600 W R/W IIS control
IISMOD 0x55000104 0x0 IIS mode
I2SFIC 0x55000108 0x0 I2S interface FIFO control register
I2SPSR 0x5500010C 0x0 I2S interface clock divider control register
I2STXD 0x55000110 0x0 W I2S interface transmit data register
I2SRXD 0x55000114 0x0 R I2S interface receive data register
I/O port
GPACON 0x56000000 0xFFFFFF W R/W Port A control
GPADAT 0x56000004 0x0 W R/W Port A data
GPBCON 0x56000010 0x0 W R/W Port B control
GPBDAT 0x56000014 0x0 W R/W Port B data
GPBUDP 0x56000018 0x00155555 W R/W Pull-up/down control B
GPBSEL 0x5600001c 0x1 W R/W Selects the function of port B
GPCCON 0x56000020 0x0 W R/W Port C control
GPCDAT 0x56000024 0x0 W R/W Port C data
GPCUDP 0x56000028 0x55555555 W R/W Pull-up/down control C
GPDCON 0x56000030 0x0 W R/W Port D control
GPDDAT 0x56000034 0x0 W R/W Port D data
GPDUDP 0x56000038 0x55555555 W R/W Pull-up/down control D
GPECON 0x56000040 0x0 W R/W Port E control
GPEDAT 0x56000044 0x0 W R/W Port E data
GPEUDP 0x56000048 0x55555555 W R/W Pull-up/down control E
GPESEL 0x5600004c 0x0 W R/W Selects the function of port E
GPFCON 0x56000050 0x0 W R/W Port F control
GPFDAT 0x56000054 0x0 W R/W Port F data
GPFUDP 0x56000058 0x5555 W R/W Pull-up/down control F
GPGCON 0x56000060 0x0 W R/W Port G control
GPGDAT 0x56000064 0x0 W R/W Port G data
GPGUDP 0x56000068 0x55555555 W R/W Pull-up/down control G
GPHCON 0x56000070 0x0 W R/W Port H control
GPHDAT 0x56000074 0x0 W R/W Port H data
GPHUDP 0x56000078 0x15555555 W R/W Pull-up/down control H
GPJCON 0x560000D0 0x0 W R/W Port J control
GPJDAT 0x560000D4 0x0 W R/W Port J data
GPJUDP 0x560000D8 0x55555555 W R/W Pull-up/down control J
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-49
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
GPJSEL 0x560000dc 0x0 W R/W Selects the function of port J
GPKCON 0x560000E0 0xAAAAAAAA W R/W Port K control
GPKDAT 0x560000E4 0x0 W R/W Port K data
GPKUDP 0x560000E8 0x55555555 W R/W Pull-up/down control K
GPLCON 0x560000F0 0x0 W R/W Port L control
GPLDAT 0x560000F4 0x0 W R/W Port L data
GPLUDP 0x560000F8 0x15555555 W R/W Pull-up/down control L
GPLSEL 0x560000FC 0x0 W R/W Selects the function of port L
GPMCON 0x56000100 0xA W R/W Port M control
GPMDAT 0x56000104 0x0 R R Port M data
GPMUDP 0x56000108 0x0 W R/W Pull-up/down control M
MISCCR 0x56000080 0xD0010020 W R/W Miscellaneous control
DCLKCON 0x56000084 0x0 W R/W DCLK0/1 control
EXTINT0 0x56000088 0x000000 W R/W External interrupt control register 0
EXTINT1 0x5600008C 0x000000 W R/W External interrupt control register 1
EXTINT2 0x56000090 0x000000 W R/W External interrupt control register 2
EINTFLT2 0x5600009c 0x000000 W R/W External interrupt control register 2
EINTFLT3 0x560000a0 0x000000 W R/W External interrupt control register 3
EINTMASK 0x560000a4 0x00FFFFF0 W R/W External interrupt mask register
EINTPEND 0x560000a8 0x00 W R/W External interrupt pending register
GSTATUS0 0x560000ac - W R External pin status
GSTATUS1 0x560000b0 0x32440001 W R Chip ID
DSC0 0x560000c0 0x2AAAAAAA W R/W Strength control register 0
DSC1 0x560000c4 0xAAAAAAA W R/W Strength control register 1
DSC2 0x560000c8 0xAAAAAAA W R/W Strength control register 2
DSC3 0x56000010 0x2AA W R/W Strength control register 3
PDDMCON 0x56000114 0x00411540 W R/W Memory I/F control register
PDSMCON 0x56000118 0x05451500 W R/W Memory I/F control register
RTC
RTCCON 0x57000040 0x00 HW R/W RTC control
TICNT0 0x57000044 0x0 B R/W Tick time count register 0
TICNT1 0x57000048 0x0 B R/W Tick time count register 1
TICNT2 0x5700004C 0x0 W R/W Tick time count register 2
RTCALM 0x57000050 0x0 B R/W RTC alarm control
ALMSEC 0x57000054 0x0 B R/W Alarm second
ALMMIN 0x57000058 0x00 B R/W Alarm minute
ALMHOUR 0x5700005C 0x0 B R/W Alarm hour
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-50
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
ALMDATE 0x57000060 0x01 B R/W Alarm day
ALMMON 0x57000064 0x01 B R/W Alarm month
ALMYEAR 0x57000068 0x0 B R/W Alarm year
BCDSEC 0x57000070 B R/W BCD second
BCDMIN 0x57000074 B R/W BCD minute
BCDHOUR 0x57000078 B R/W BCD hour
BCDDATE 0x5700007C B R/W BCD day
BCDDAY 0x57000080 B R/W BCD date
BCDMON 0x57000084 B R/W BCD month
BCDYEAR 0x57000088 B R/W BCD year
TICKCNT 0x57000090 0x0 W R Internal tick time counter
A/D Converter
ADCCON 0x58000000 W R/W ADC control
ADCTSC 0x58000004 ADC touch screen control
ADCDLY 0x58000008 ADC start or interval delay
ADCDAT0 0x5800000C R ADC conversion data
ADCDAT1 0x58000010 ADC conversion data
ADCUPDN 0x58000014 R/W Stylus up or down interrupt status
ADCMUX 0x58000018 R/W Analog input channel select
HSSPI(SPI Channel 0)
CH_CFG 0x52000000 0x40 R/W SPI configuration register
Clk_CFG 0x52000004 0x0 R/W Clock configuration register
MODE_CFG 0x52000008 0x0 R/W SPI FIFO control register
Slave_slection_reg 0x5200000C 0x1 R/W Slave selection signal
SPI_INT_EN 0x52000010 0x0 R/W SPI Interrupt Enable register
SPI_STATUS 0x52000014 0x0 R SPI status register
SPI_TX_DATA 0x52000018 0x0 W SPI TX DATA register
SPI_RX_DATA 0x5200001C 0x0 R SPI RX DATA register
Packet_Count_reg 0x52000020 0x0 R/W Count how many data master gets
Pending_clr_reg 0x52000024 0x0 R/W Pending clear register
SWAP_CFG 0x52000028 0x0 R/W SWAP config register
FB_Clk_sel 0x5200002C 0x3 R/W Feedback clock selecting register.
HSSPI(SPI Channel 1)
CH_CFG 0x59000000 0x40 R/W SPI configuration register
Clk_CFG 0x59000004 0x0 R/W Clock configuration register
MODE_CFG 0x59000008 0x0 R/W SPI FIFO control register
Slave_slection_reg 0x5900000C 0x1 R/W Slave selection signal
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-51
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
SPI_INT_EN 0x59000010 0x0 R/W SPI Interrupt Enable register
SPI_STATUS 0x59000014 0x0 R SPI status register
SPI_TX_DATA 0x59000018 0x0 W SPI TX DATA register
SPI_RX_DATA 0x5900001C 0x0 R SPI RX DATA register
Packet_Count_reg 0x59000020 0x0 R/W Count how many data master gets
Pending_clr_reg 0x59000024 0x0 R/W Pending clear register
SWAP_CFG 0x59000028 0x0 R/W SWAP config register
FB_Clk_sel 0x5900002C 0x3 R/W Feedback clock selecting register.
HSMMC Channel 0
SYSAD 0x4AC00000 0x00000000 W R/W SDI control register
BLKSIZE 0x4AC00004 0x00000000 HW R/W Host DMA Buffer Boundary and Transfer
Block Size Register
BLKCNT 0x4AC00006 0x00000000 HW R/W Blocks Count For Current Transfer
ARGUMENT 0x4AC00008 0x00000000 HW R/W Command Argument Register
TRNMOD 0x4AC0000C 0x00000000 HW R/W Transfer Mode Setting Register
CMDREG 0x4AC0000E 0x00000000 HW R/W Command Register
RSPREG0 0x4AC00010 0x00000000 W ROC Response Register 0
RSPREG1 0x4AC00014 0x00000000 W ROC Response Register 1
RSPREG2 0x4AC00018 0x00000000 W ROC Response Register 2
RSPREG3 0x4AC0001C 0x00000000 W ROC Response Register 3
BDATA 0x4AC00020 Not fixed W ROC Buffer Data Register
PRNSTS 0x4AC00024 0x00000000 W ROC Present State Register
HOSTCTL 0x4AC00028 0x00000000 B R/W Present State Register
PWRCON 0x4AC00029 0x00000000 B R/W Present State Register
BLKGAP 0x4AC0002A 0x00000000 B R/W Block Gap Control Register
WAKCON 0x4AC0002B 0x00000000 B R/W Wakeup Control Register
CLKCON 0x4AC0002C 0x00000000 HW R/W Command Register
TIMEOUTCON 0x4AC0002E 0x00000000 B R/W Timeout Control Register
SWRST 0x4AC0002F 0x00000000 B R/W Software Reset Register
NORINTSTS 0x4AC00030 0x00000000 HW ROC/
RW1C
Normal Interrupt Status Register
ERRINTSTS 0x4AC00032 0x00000000 HW ROC/
RW1C
Error Interrupt Status Register
NORINTSTSEN 0x4AC00034 0x00000000 HW R/W Normal Interrupt Status Enable Register
ERRINTSTSEN 0x4AC00036 0x00000000 HW R/W Error Interrupt Status Enable Register
NORINTSIGEN 0x4AC00038 0x00000000 HW R/W Normal Interrupt Signal Enable Register
ERRINTSIGEN 0x4AC0003A 0x00000000 HW R/W Error Interrupt Signal Enable Register
ACMD12ERRSTS 0x4AC0003C 0x00000000 HW ROC Auto CMD12 Error Status Register
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-52
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
CAPAREG 0x4AC00040 0x05E80080 W HWInit Capabilities Register
MAXCURR 0x4AC00048 0x00000000 W HWInit Maximum Current Capabilities Register
FEAER 0x4AC00050 0x00000000 HW WO Force Event Auto CMD12 Error Interrupt
Register Error Interrupt
FEERR 0x4AC00052 0x00000000 HW WO Force Event Error Interrupt Register Error
Interrupt
ADMAERR 0x4AC00054 0x00000000 W R/W ADMA Error Status Register
ADMASYSADDR 0x4AC00058 0x00000000 W R/W ADMA System Address Register
CONTROL2 0x4AC00080 0x00000000 W R/W Control register 2
CONTROL3 0x4AC00084 0x7F5F3F1F W R/W FIFO Interrupt Control
(Control Register 3)
DEBUG 0x4AC00088 Not fixed W R/W Debug register
CONTROL4 0x4AC0008C 0x00000000 W R/W
HCVER 0x4AC000FE 0x00000401 HW HWInit Host Controller Version Register
HSMMC Channel 1
SYSAD 0x4A800000 0x00000000 W R/W SDI control register
BLKSIZE 0x4A800004 0x00000000 HW R/W Host DMA Buffer Boundary and Transfer
Block Size Register
BLKCNT 0x4A800006 0x00000000 HW R/W Blocks Count For Current Transfer
ARGUMENT 0x4A800008 0x00000000 HW R/W Command Argument Register
TRNMOD 0x4A80000C 0x00000000 HW R/W Transfer Mode Setting Register
CMDREG 0x4A80000E 0x00000000 HW R/W Command Register
RSPREG0 0x4A800010 0x00000000 W ROC Response Register 0
RSPREG1 0x4A800014 0x00000000 W ROC Response Register 1
RSPREG2 0x4A800018 0x00000000 W ROC Response Register 2
RSPREG3 0x4A80001C 0x00000000 W ROC Response Register 3
BDATA 0x4A800020 Not fixed W ROC Buffer Data Register
PRNSTS 0x4A800024 0x00000000 W ROC Present State Register
HOSTCTL 0x4A800028 0x00000000 B R/W Present State Register
PWRCON 0x4A800029 0x00000000 B R/W Present State Register
BLKGAP 0x4A80002A 0x00000000 B R/W Block Gap Control Register
WAKCON 0x4A80002B 0x00000000 B R/W Wakeup Control Register
CLKCON 0x4A80002C 0x00000000 HW R/W Command Register
TIMEOUTCON 0x4A80002E 0x00000000 B R/W Timeout Control Register
SWRST 0x4A80002F 0x00000000 B R/W Software Reset Register
NORINTSTS 0x4A800030 0x00000000 HW ROC/
RW1C
Normal Interrupt Status Register
ERRINTSTS 0x4A800032 0x00000000 HW ROC/
RW1C
Error Interrupt Status Register
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-53
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
NORINTSTSEN 0x4A800034 0x00000000 HW R/W Normal Interrupt Status Enable Register
ERRINTSTSEN 0x4A800036 0x00000000 HW R/W Error Interrupt Status Enable Register
NORINTSIGEN 0x4A800038 0x00000000 HW R/W Normal Interrupt Signal Enable Register
ERRINTSIGEN 0x4A80003A 0x00000000 HW R/W Error Interrupt Signal Enable Register
ACMD12ERRSTS 0x4A80003C 0x00000000 HW ROC Auto CMD12 Error Status Register
CAPAREG 0x4A800040 0x05E80080 W HWInit Capabilities Register
MAXCURR 0x4A800048 0x00000000 W HWInit Maximum Current Capabilities Register
FEAER 0x4A800050 0x00000000 HW WO Force Event Auto CMD12 Error Interrupt
Register Error Interrupt
FEERR 0x4A800052 0x00000000 HW WO Force Event Error Interrupt Register Error
Interrupt
ADMAERR 0x4A800054 0x00000000 W R/W ADMA Error Status Register
ADMASYSADDR 0x4A800058 0x00000000 W R/W ADMA System Address Register
CONTROL2 0x4A800080 0x00000000 W R/W Control register 2
CONTROL3 0x4A800084 0x7F5F3F1F W R/W FIFO Interrupt Control
(Control Register 3)
DEBUG 0x4A800088 Not fixed W R/W Debug register
CONTROL4 0x4A80008C 0x00000000 W R/W
HCVER 0x4A8000FE 0x00000401 HW HWInit Host Controller Version Register
AC97 Audio-CODEC Interface
AC_GLBCTRL 0x5B000000 0x0 W R/W AC97 global control register
AC_GLBSTAT 0x5B000004 0x1 R AC97 global status register
AC_CODEC_CMD 0x5B000008 0x0 R/W AC97 codec command register
AC_CODEC_STAT 0x5B00000C 0x0 R AC97 codec status register
AC_PCMADDR 0x5B000010 0x0 R AC97 PCM out/in channel FIFO address
register
AC_MICADDR 0x5B000014 0x0 R AC97 mic in channel FIFO address register
AC_PCMDATA 0x5B000018 0x0 R/W AC97 PCM out/in channel FIFO data
register
AC_MICDATA 0x5B00001C 0x0 R AC97 MIC in channel FIFO data register
PCM Audio Interface
PCM_CTL0 0x5C000000 0x0 W R/W PCM0 Main Control
PCM_CTL1 0x5C000100 0x0 R/W PCM1 Main Control
PCM_CLKCTL0 0x5C000004 0x0 R/W PCM0 Clock and Shift control
PCM_CLKCTL1 0x5C000104 0x0 R/W PCM1 Clock and Shift control
PCM_TXFIFO0 0x5C000008 0x0 R/W PCM0 TxFIFO write port
PCM_TXFIFO1 0x5C000108 0x0 R/W PCM1 TxFIFO write port
PCM_RXFIFO0 0x5C00000C 0x0 R/W PCM0 RxFIFO read port
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-54
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
PCM_RXFIFO1 0x5C00010C 0x0 R/W PCM1 RxFIFO read port
PCM_IRQ_CTL0 0x5C000010 0x0 R/W PCM0 Interrupt Control
PCM_IRQ_CTL1 0x5C000110 0x0 R/W PCM1 Interrupt Control
PCM_IRQ_STAT0 0x5C000014 0x0 R PCM0 Interrupt Status
PCM_IRQ_STAT0 0x5C000114 0x0 R PCM1 Interrupt Status
PCM_FIFO_STAT0 0x5C000018 0x0 R PCM0 Tx Default Value
PCM_FIFO_STAT0 0x5C000118 0x0 R PCM1 Tx Default Value
PCM_CLRINT0 0x5C000020 0x0 W PCM0 INTERRUPT CLEAR
PCM_CLRINT0 0x5C000120 0x0 W PCM1 INTERRUPT CLEAR
2D
CONTROL_REG 0x4D408000 0x0000_0000 W W Control register.
INTEN_REG 0x4D408004 0x0000_0000 R/W Interrupt Enable register.
FIFO_INTC_REG 0x4D408008 0x0000_0018 R/W Interrupt Control register.
INTC_PEND_REG 0x4D40800C 0x0000_0000 R/W Interrupt Control Pending register.
FIFO_STAT_REG 0x4D408010 0x0000_0600 R Command FIFO Status reg
CMD0_REG 0x4D408100 - W Command register for Line/Point drawing.
CMD1_REG 0x4D408104 - W Command register for BitBLT.
CMD2_REG 0x4D408108 - W Command register for Host to Screen Bitblt
transfer start.
CMD3_REG 0x4D40810C - W Command register for Host to Screen Bitblt
transfer continue.
CMD4_REG 0x4D408110 - W Command register for Color Expansion.
(Host to Screen, Font Start)
CMD5_REG 0x4D408114 - W Command register for Color Expansion.
(Host to Screen, Font Continue)
CMD6_REG 0x4D408118 - W Reserved
CMD7_REG 0x4D40811C - W Command register for Color Expansion.
(Memory to Screen)
SRC_ RES_REG 0x4D408200 0x0000_0000 R/W Source Image Resolution
SRC_HORI_RES_REG 0x4D408204 0x0000_0000 R/W Source Image Horizontal Resolution
SRC_VERT_RES_REG 0x4D408208 0x0000_0000 R/W Source Image Vertical Resolution
SC_RES_REG 0x4D408210 0x0000_0000 R/W Screen Resolution
SC_HORI_RES _REG 0x4D408214 0x0000_0000 R/W Screen Horizontal Resolution
SC_VERT_RES _REG 0x4D408218 0x0000_0000 R/W Screen Vertical Resolution
CW_LT_REG 0x4D408200 0x0000_0000 R/W LeftTop coordinates of Clip Window.
CW_LT_X_REG 0x4D408204 0x0000_0000 R/W Left X coordinate of Clip Window.
CW_LT_Y_REG 0x4D408228 0x0000_0000 R/W Top Y coordinate of Clip Window.
CW_RB_REG 0x4D408230 0x0000_0000 R/W RightBottom coordinate of Clip Window.
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-55
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
CW_RB_X_REG 0x4D408234 0x0000_0000 R/W Right X coordinate of Clip Window.
CW_RB_Y_REG 0x4D408238 0x0000_0000 R/W Bottom Y coordinate of Clip Window.
COORD0_REG 0x4D408300 0x0000_0000 R/W Coordinates 0 register.
COORD0_X_REG 0x4D408304 0x0000_0000 R/W X coordinate of Coordinates 0.
COORD0_Y_REG 0x4D408308 0x0000_0000 R/W Y coordinate of Coordinates 0.
COORD1_REG 0x4D408310 0x0000_0000 R/W Coordinates 1 register.
COORD1_X_REG 0x4D408314 0x0000_0000 R/W X coordinate of Coordinates 1.
COORD1_Y_REG 0x4D408318 0x0000_0000 R/W Y coordinate of Coordinates 1.
COORD2_REG 0x4D408320 0x0000_0000 R/W Coordinates 2 register.
COORD2_X_REG 0x4D408324 0x0000_0000 R/W X coordinate of Coordinates 2.
COORD2_Y_REG 0x4D408328 0x0000_0000 R/W Y coordinate of Coordinates 2.
COORD3_REG 0x4D408330 0x0000_0000 R/W Coordinates 3 register.
COORD3_X_REG 0x4D408334 0x0000_0000 R/W X coordinate of Coordinates 3.
COORD3_Y_REG 0x4D408338 0x0000_0000 R/W Y coordinate of Coordinates 3.
ROT_OC_REG 0x4D408340 0x0000_0000 R/W Rotation Origin Coordinates.
ROT_OC_X_REG 0x4D408344 0x0000_0000 R/W X coordinate of Rotation Origin
Coordinates.
ROT_OC_Y_REG 0x4D408348 0x0000_0000 R/W Y coordinate of Rotation Origin
Coordinates.
ROTATE_REG 0x4D40834C 0x0000_0001 R/W Rotation Mode register.
X_INCR_REG 0x4D408400 0x0000_0000 R/W X Increment register.
Y_INCR_REG 0x4D408404 0x0000_0000 R/W Y Increment register.
ROP_REG 0x4D408410 0x0000_0000 R/W Raster Operation register.
ALPHA_REG 0x4D408420 0x0000_0000 R/W Alpha value, Fading offset.
FG_COLOR_REG 0x4D408500 0x0000_0000 R/W Foreground Color / Alpha register.
BG_COLOR_REG 0x4D408504 0x0000_0000 R/W Background Color register
BS_COLOR_REG 0x4D408508 0x0000_0000 R/W Blue Screen Color register
SRC_COLOR_MODE_REG 0x4D408510 0x0000_0000 R/W Src Image Color Mode register.
DEST_COLOR_MODE_REG 0x4D408514 0x0000_0000 R/W Dest Image Color Mode register
PATTERN_REG[0:31] 0x4D408600 ~
0x4D80867C
0x0000_0000 R/W Pattern memory.
PATOFF_REG 0x4D408700 0x0000_0000 R/W Pattern Offset XY register.
PATOFF_X_REG 0x4D408704 0x0000_0000 R/W Pattern Offset X register.
PATOFF_Y_REG 0x4D408708 0x0000_0000 R/W Pattern Offset Y register.
STENCIL_CNTL_REG 0x4D408720 0x0000_0000 R/W Stencil control register
STENCIL_DR_MIN_REG 0x4D408724 0x0000_0000 W Stencil decision reference MIN register
STENCIL_DR_MAX_REG 0x4D408728 0xFFFF_FFFF W Stencil decision reference MAX register
SRC_BASE_ADDR_REG 0x4D408730 0x0000_0000 R/W Source Image Base Address register
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-56
Register Name Address Reset Value
A
cc.
Unit Read/
Write Function
DEST_BASE_ADDR_REG 0x4D408734 0x0000_0000 R/W Dest Image Base Address register (in most
cases, frame buffer address)
S3C2450X RISC MICROPROCESSOR PRODUCT OVERVIEW
1-57
Cautions on S3C2450 Special Registers
1. S3C2450 does not support the big endian mode.
2. The special registers have to be accessed for each recommended access unit.
3. All registers except ADC registers, RTC registers and UART registers must be read/write in word unit (32-bit).
4. Make sure that the ADC registers, RTC registers and UART registers be read/write by the specified access
unit and the specified address.
5. W : 32-bit register, which must be accessed by LDR/STR or int type pointer (int *).
HW : 16-bit register, which must be accessed by LDRH/STRH or short int type pointer (short int *).
B : 8-bit register, which must be accessed by LDRB/STRB or char type pointer (char int *).
PRODUCT OVERVIEW S3C2450X RISC MICROPROCESSOR
1-58
NOTES
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-1
2 SYSTEM CONTROLLER
1 OVERVIEW
The system controller consists of three parts; reset control, system clock control, and system power-management
control. The system clock control logic in S3C2450 can generate the required system clock signals which are the
inputs of ARM926EJ, several AHB blocks, and APB blocks. There are two PLLs in S3C2450 to generate internal
clocks. One is for general functional blocks, which include ARM, AHB, and APB. The other is for the special
functional clocks which are the USB, I2S and camera interface clock. Software program control the operating
frequency of the PLLs, internal clock sources and enabled or disabled the clocks to reduce the power
consumption.
S3C2450 has various power-down modes to keep optimal power consumption for a given task. The power-down
modes consists of four modes; NORMAL mode, IDLE mode, STOP mode, and SLEEP mode. In NORMAL mode,
the input clock of each block is enabled or disabled according to the software to eliminate the power consumption
of unused blocks for a certain application. For example, if an UART is not needed, the software can disable the
input clock independently. The major power dissipation of S3C2450 is due to ARM core, since the operating
speed is relative higher than that of the other blocks. Typically, the operating frequency of the ARM core is
533MHz, while the AHB blocks and the APB blocks operate on 133MHz and 66MHz, respectively. Thus, the
power control of the ARM core is major issue to reduce the overall power dissipation in S3C2450, and IDLE mode
is supported for this purpose. In IDLE mode, the ARM core is not operated until the external interrupts or internal
interrupts. The STOP mode freezes all clocks to all peripherals as well as the ARM core by disabling PLLs. The
power consumption is only due to the leakage current and the minimized alive block in S3C2450. SLEEP mode is
intended to disconnect the internal power. So, the power consumption due to the ARM core and the internal logic
except the wake-up logic will be nearly zero in the SLEEP mode. In order to use the SLEEP mode two
indenpendent power sources are required. One of the two power soruces supplies the power for the wake-up
logic. The other one supplies the normal functional blocks including the ARM core. It should be controlled in order
to turn ON/OFF with a special pin in S3C2450. The detailed description of the power-saving modes such as the
entering sequence to the specific power-down mode or the wake-up sequence from a power-down mode is given
in the following Power Management section.
2 FEATURE
• Include two on-chip PLLs called main PLL(MPLL), extra PLL(EPLL)
• MPLL generates the system reference clock
• EPLL generates the clocks for the special functional blocks
• Independent clock ON/OFF control to reduce power consumption
• Support three power-down modes, IDLE, STOP, and SLEEP, to optimize the power dissipation
• Wake-up by one of external Interrupt, RTC alarm, Tick interrupt and BATT_FLT.(Stop and Sleep mode)
• Control internal bus arbitration priority
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-2
3 BLOCK DIAGRAM
Glue
AHB
Clock
Generator
Power Management
Register
Glue Reset
Control
Power Management
Register
Signal
Masking
off-part alive-part
Power
ON/OFF
Reset
Clocks
Figure 2-1. System Controller Block Diagram
Figure 2-1 shows the system controller block diagram. The system controller is divided into two blocks, which are
the OFF block and the ON block. Since the system controller must be alive when the external power supply is
disabled. The ALIVE-part is supplied by an auxiliary power source and waits until external/internal interrupts.
However, the OFF-part is disabled when the power-down mode is SLEEP. The clock generator makes all internal
clocks, which include ARMCLK for the ARM core, HCLK for the AHB blocks, PCLK for the APB block, and other
special clocks. The special functional registers (SFR) are located at the register blocks, and their values are
configured through AHB interface. If a software want to change into a power-down mode, then the power
management blocks detect the values within the SFR and change the mode. In addition, they assert the external
power ON/OFF signal if required. All reset signals are generated at the reset control block.
The detailed explanations for each block will be described in the following sections.
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-3
4 FUNCTIONAL DESCRIPTIONS
The system controller for S3C2450 has three functions, which include the reset management, the clock
generation, and the power management. In this section, the behavior will be described.
4.1 RESET MANAGEMENT AND TYPES
S3C2450 has four types of resets and reset controller in system controller can place the system into the
predefined states with one of the following four resets.
• Hardware Reset − It is generated when nRESET pin is asserted. It is an uncompromised, unmaskable, and
complete reset, which is used when you need no information in system any more.
• Watchdog Reset − The watchdog timer monitors the device state and generates the watchdog reset when the
state is abnormal.
• Software Reset − Software can initialize the internal state by writing the special control register (SWRST).
• Wakeup Reset − When the system wakes up from SLEEP mode, it generates reset signals. And When the
system wakes up from Deep-STOP mode, it generates ARM reset only.
4.2 HARDWARE RESET
When S3C2450 is power-ON, the external device must assert nRESET to initialize internal states.
Hardware reset is invoked when the nRESET pin is asserted and all units in the system (except RTC) are
initialized to known states. During the hardware reset, the following actions will occur:
• All internal registers and ARM926EJ core goes into their pre-defined initial state.
• All pins get their reset state, and BATT_FLT pin is ignored.
• The nRSTOUT pin is asserted while the reset is progressed.
When the unmaskable nRESET pin is asserted as low, the internal hardware reset signal is generated. Upon
assertion of nRESET, S3C2450 enters reset state regardless of the previous state. To enter hardware reset state,
nRESET must be held long enough to allow internal stabilization and propagation of the reset state.
Caution: An external power source, regulator, for S3C2450 must be stable prior to the deassertion of nRESET.
Otherwise, it damages to S3C2450 and its operation will not be guaranteed.
Figure 2-2 shows the clock behavior during the power-on reset sequence. The crystal oscillator begins oscillation
within several milliseconds after the power source supplies enough power-level to S3C2450. Initially, two internal
PLLs (MPLL and EPLL) stop. The nRESET pin should be released after the fully settle-down of the power supply-
level. S3C2450 requires a hazard-free system clock (SYSCLK, ARMCLK, HCLK, and PCLK) to operate properly
when the system reset is released. Since the PLL does not work initially, the PLL input clock (FIN) is directly fed to
SYSCLK instead of the PLL output clock (FOUT). Software must configure MPLLCON and EPLLCON register to
use each PLL. The PLL begins the lockup sequence toward the new frequency only after the S/W configures the
PLL with a new frequency-value. The PLL output is immediately fed to SYSCLK after lock time.
You should be aware that the crystal oscillator settle-down time is not explicitly added by the hardware during the
power-up sequence and the crystal oscillation must be settle-down during this period. However, S3C2450 will
explicitly add the crystal oscillator settle-down time (OSCWAIT) when it wakes up from the STOP mode.
The EPLL output clock is directly fed to some special clocks for TFT Controller, I2S, HS-MMC, USB host and
UART. Since the EPLL input clock is initially fed to the input clocks for them, software must configure EPLLCON
register to use the EPLL.
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-4
POWER
nRESET
EXTCLK
or XTIpll
VCO
output
SYSCLK
PLL is configured by S/W first time
Lock time
VCO is adapte to new clock frequency
.
The logic is operarted by
EXTCLK or XTIpll SYSCLK is FOUT
Clock
disable
Figure 2-2. Power-On Reset Sequence
4.3 WATCHDOG RESET
Watchdog reset is invoked when software fails to prevent the watchdog timer from timing out.
During the watchdog reset, the following actions occur :
• All units(except some blocks listed in table 2-1 ) go into their pre-defined reset state.
• All pins get their reset state, and BATT_FLT pin is ignored.
• The nRSTOUT pin is asserted during watchdog reset.
Watchdog reset can be activated in normal and idle mode because watchdog timer can expire with clock.
Watchdog reset is invoked when watchdog timer and reset are enabled (WTCON[5] = 1, WTCON[0]=1) and
watchdog timer is expired. Watchdog reset is invoked then, the following sequence occurs. :
1. Watchdog reset source asserts.
2. Internal reset signals and nRSTOUT are asserted and reset counter is activated.
3. Reset counter is expired then, internal reset signals and nRSTOUT are deasserted.
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-5
4.4 SOFTWARE RESET
Software can initialize the device state itself when it writes “0x533C_2450” to SWRST register.
During the software reset, the following actions occur :
• All units(except some blocks listed in table 2-1 ) go into their pre-defined reset state.
• All pins get their reset state, and BATT_FLT pin is ignored.
• The nRSTOUT pin is asserted during software reset.
Software reset is invoked then, the following sequence occurs. :
1. User write “0x533C_2450” to SWRST register.
2. System controller request bus controller to finish current transactions.
3. Bus controller send acknowledge to system controller after completed bus transactions.
4. System controller request memory controller to enter into self refresh mode.
5. System controller wait for self refresh acknowledge from memory controller.
6. Internal reset signals and nRSTOUT are asserted and reset counter is activated.
7. Reset counter is expired then, internal reset signals and nRSTOUT are deasserted.
4.5 WAKEUP RESET
When S3C2450 is woken up from SLEEP mode by wakeup event, the wakeup reset is invoked. The detail
description will be explained in the power management mode section.
Table 2-1 lists alive registers which are not influenced various reset sources except nRESET. With the exception
of below registers (in table 2-1), All S3C2450’s internal registers are reset by above-mentioned reset sources.
Table 2-1. Registers & GPIO Status in RESET (R: reset, S: sustain previous value)
Region Registers
Software
Wakeup
Watchdog
nRESET
SYSCON OSCSET , PWRCFG, RSTCON, RSTSTAT, WKUPSTAT, INFORM0,
INFORM1, INFORM2, INFORM3 S S S R
GPIO GPFCON, GPFUDP, GPFDAT, GPGCON[7:0], GPGUDP,
GPGDAT[7:0], EXTINT0 ~ EXTINT15 R S R R
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-6
5 CLOCK MANAGEMENT
5.1 CLOCK GENERATION OVERVIEW
Figure 2-3 shows the block diagram of the clock generation module. The main clock source comes from an
external crystal (XTI) or external clock (EXTCLK). EPLL’s input clock is one of the XTI or EXTCLK. Clock selection
can be done by configuring MUX selection signal. When both XTI and EXTCLK are running, GFM(Glitch Free
Mux)’s output can be configured easily without generating glitch. But if you change or select EPLL input clock
when either XTI or EXTCLK is running, disabled clock should be have logic LOW.
XTI clock source can be reference of PLL after oscillated at PAD. User can configure stabilization time by setting
OSCSET register and ON/OFF when power-down mode by setting PWRCFG register. The clock generator
consists of two PLLs (Phase-Locked-Loop) which generate the high-frequency clock signals required in S3C2450.
MPLL
ExtClk Div
XTI
EXTCLK
OM[0]
ARMCLK
HCLK
PCLK
DDRCLK
SYSCLK
EPLL
XTI
EXTCLK ECLK USBHOST
CAMCLK
I2SCLK
UARTCLK
LCDCLK
OM[0]&
CLKSRC
Clock
Divider &
Mux
Figure 2-3. Clock Generator Block Diagram
5.2 CLOCK SOURCE SELECTION
Table 2-2 and 2-3 show the relationship between the combination of mode control pins OM[0] and the selection of
source clock for S3C2450.
Table 2-2. Clock source selection for the main PLL and clock generation logic
OM[0] MPLL Reference Clock
(Main clock source)
0 XTI
1 EXTCLK
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-7
Table 2-3. Clock Source Selection for the EPLL
CLKSRC[8] (register) CLKSRC[7] (register) OM[0] EPLL Reference Clock
0 X 0 XTI
0 X 1 EXTCLK
1 0 X XTI
1 1 X EXTCLK
Table 2-4. PLL & Clock Generator Condition
MPLLCAP : N/A
Loop filter capacitance CLF EPLLCAP : Typical 1.8nF 5%
Fin - MPLL: 10 − 30 MHz
EPLL: 10 − 40 MHz
Fout - MPLL: 40 − 1600 MHz
EPLL: 20 − 600 MHz
External capacitance used for X-tal CEXT 15 pF
Feedback Resistor used for X-tal RF 1MΩ
Figure 2-4. Main Oscillator Circuit Examples
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-8
5.3 PLL (PHASE-LOCKED-LOOP)
The PLL (Phase-Locked Loop) frequency synthesizer is constructed in CMOS on single monolithic structure. The
PLL provides frequency multiplication capabilities.
MPLL generates the clock sources for ARMCLK, HCLK, PCLK, DDRCLK and SSMCCLK and EPLL generates
clock sources for USBHOSTCLK, CAMCLK and so forth.
The following sections describe the operation of the PLL, that includes the phase difference detector, charge
pump, VCO (Voltage controlled oscillator), and loop filter.
Refer to MPLLCON and EPLLCON registers to change PLL output frequency.
Fout
Off-chip loop filter
Fin Pre-Divider
Main
Divider
PFD Charge
Pump VCO Post
Scaler
Figure 2-5. PLL(Phase-Locked Loop) Block Diagram
5.4 CHANGE PLL SETTINGS IN NORMAL OPERATION
During the operation of S3C2450 in NORMAL mode, if the user wants to change the frequency by writing the PMS
value, the PLL lock time is automatically inserted. During the lock time, the clock is not supplied to the internal
blocks in S3C2450. The timing diagram is as follow.
MPLL_clk
PMS setting
PLL Locktime
SYSCLK
It changes to new PLL clock
after lock time automatically
It changes to LOW value during
lock time automatically
Figure 2-6. The Case that Changes Slow Clock by Setting PMS Value
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-9
5.5 SYSTEM CLOCK CONTROL
The ARMCLK is used for ARM926EJ core, the main CPU of S3C2450. The HCLK is the reference clock for
internal AHB bus and peripherals such as the memory controller, the interrupt controller, LCD controller, the DMA,
USB host block, System Controller, Power down controller and etc. The PCLK is used for internal APB bus and
peripherals such as WDT, IIS, I2C, PWM timer, ADC, UART, GPIO, RTC and SPI etc. DDRCLK is the data strobe
clock for mDDR/DDR2 memories. CAMclk is used for camera interface block. HCLKCON and PCLKCON registers
are used for clock gating of HCLK, PCLK respectively. SCLKCON register is responsible for EPLLclk clock gating
on related modules.
Figure 2-7. The Clock Distribution Block Diagram
Figure 2-8 shows MPLL Based clock domain.
Figure 2-8. MPLL Based Clock Domain
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-10
5.6 ARM & BUS CLOCK DIVIDE RATIO
The MSysClk is the base clock for S3C2450 system clock, such as ARMCLK, HCLK, PCLK, DDRCLK, etc.
The Table 2-5 shows the clock division ratios between ARMCLK, HLCK and PCLK. This ratio is determined by
ARMDIV, PREDIV, HCLKDIV and PCLKDIV bits of CLKDIV0 control register.
ARMCLK has to faster or equal with HCLK and synchronous. The Table 2-5 shows that DDRCLK, PCLK,
ARMCLK divide ratio with regard HCLK ratio.
The fraction in the cell is ratio to MSysClk and the value in the round bracket means maximum frequency value.
Table 2-5. Clock Division Ratio of MPLL Region
MSysClk
(800MHz) HCLK
(133MHz) DDRCLK
(266MHz) PCLK, SSMC
(133MHz) ARMCLK (533MHz)
1/1 1/1 1/1 or 1/2 1/1
1/2 1/1 1/2 or 1/4 1/1 or 1/2
1/3 1/1 1/3 or 1/6 1/1 or 1/3
1/4 1/2 1/4 or 1/8 1/1 or 1/2 or 1/4
1/6 1/3 1/6 or 1/12 1/1 or 1/2 or 1/3 or 1/6
1/8 1/4 1/8 or 1/16 1/1 or 1/2 or 1/4 or 1/8
1/12 1/6 1/12 or 1/24 1/1 or 1/2 or 1/3 or 1/4 or 1/6
1/16 1/8 1/16 or 1/32 1/1 or 1/2 or 1/4 or 1/8
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-11
5.7 EXAMPLES FOR CONFIGURING CLOCK REGITER TO PRODUCE SPECIFIC FREQUENCY OF AMBA
CLOCKS.
When PLL output frequency = 533MHz
Target frqeuency
ARMCLK = 533MHz, HCLK = 133MHz, PCLK = 66MHz, DDRCLK = 266MHz
SSMCCLK = 66MHz
Register value
ARMDIV = 4’b0000, PREDIV = 2’b01, HCLKDIV = 2’b01, PCLKDIV = 1’b1
HALKHCLK = 1’b1
When PLL output frequency = 800MHz
Target frqeuency
ARMCLK = 400MHz, HCLK = 133MHz, PCLK = 66MHz, DDRCLK = 266MHz
SSMCCLK = 66MHz
Register value
ARMDIV = 4’b0001, PREDIV = 2’b10, HCLKDIV = 2’b01, PCLKDIV = 1’b1
HALKHCLK = 1’b1
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-12
Figure 2-9 shows EPLL and special clocks for various peripherals
Figure 2-9. EPLL Based Clock Domain
5.8 ESYSCLK CONTROL
Clocks of the EPLL can be used for various peripherals. Each divider value is configured in CLKDIV1 register and
all clocks are enabled or disabled by accessing SCLKCON register. According to USB host interface, If you want
to get the clock with exact 50% duty cycle, then make EPLL generate 96MHz and divide the clock.
EPLL will be turned off during STOP and SLEEP mode automatically. Also, EPLL will be generated clock to
ESYSCLK, after exiting STOP and SLEEP mode if corresponding bits are enabled in SCLKCON register.
Table 2-6. ESYSCLK Control
Condition ESYSCLK state EPLL state
After reset EPLL reference clock off
After configuring EPLL During PLL lock time: LOW
After PLL lock time: EPLL output on
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-13
6 POWER MANAGEMENT
The power management block controls the system clocks by software for the reduction of power consumption in
S3C2450. These schemes are related to PLL, clock control logic(ARMCLK, HCLK, PCLK) and wake-up signal.
S3C2450 has four power-down modes. The following section describes each power management mode.
Related registers are PWRMODE, PWRCFG and WKUPSTAT.
6.1 POWER MODE STATE DIAGRAM
Figure 2-10 shows that Power Saving mode state and Entering or Exiting condition. In general, the entering
conditions are set by the main CPU.
Normal
(General Clock
Gating Mode)
IDLE
SLEEP
STOP
or DEEP-STOP
STANDBYWFI CMD
CMD
One of
wakeup
source
Reset
or
restricted
wakeup
evants.
One of
wakeup
source
Figure 2-10. Power Mode State Diagram
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-14
6.2 POWER SAVING MODES
S3C2450 can support various power saving modes. These are Normal mode, idle mode, Stop mode, Deep-stop
mode and Sleep mode.
6.2.1 Normal Mode (General Clock Gating Mode)
In General Clock Gating mode, the On/Off clock gating of the individual clock source of each IP block is performed
by controlling of each corresponding clock source enable bit. The Clock Gating is applied instantly whenever the
corresponding bit (or bits) is changed. (these bits are set or cleared by the main CPU.)
6.2.2 IDLE Mode
In IDLE mode, the clock to CPU core is stopped. To enter the idle mode, User must use ARM926EJ CP15
command (MCR p15, 0, Rd, c7, c0, 4). If user order this command, ARM core prepare to enter into power down
mode. These are draining write buffer, letting memory system is in a quiescent state and confirming all external
interface(AHB interface) is in idle state. After completing above operation, ARM asserted STANBYWFI signal. So,
System Controller of S3C2450 check STANDBYWFI signal is asserted and disabe ARM clock. By doing that,
System can go into idle mode safely. To exit the idle mode, All interrupt sources, RTC ALARM, RTC Tick Counter,
Battery Fault signal should be activated.
6.2.3 STOP mode (Normal and Deep-stop)
In STOP mode, all clocks are stopped for minimum power consumption. Therefore, the PLL and oscillator circuit
are also stopped(oscillator circuit is stopped optionally, see PWRCFG register). The STOP Mode is activated after
the execution of the STORE instruction that enables the STOP Mode bit. The STOP Mode bit should be cleared
after the wake-up from the STOP state for the entering of next STOP Mode. The H/W logic only detects the low-
to-high triggering of the STOP Mode bit.
In Deep-STOP mode ARM core’s power is off by using internal power gating. By this way, the static current will be
reduced remarkably compared with STOP mode. To enter the Deep-STOP mode, PWRMODE[18] register should
be configured before entering STOP mode. After waking up from Deep-STOP mode, System controller resets
ARM core only.
To exit from STOP mode, External interrupt, RTC alarm, RTC Tick, or nRESET has to be activated. During the
wake-up sequences, the crystal oscillator and PLL may begin to operate. The crystal-oscillator settle-down-time
and the PLL locking-time is required to provide stabilized ARMCLK. Those time-waits are automatically inserted
by the hardware of S3C2450. During these time-waits, the clock is not supplied to the internal logic circuitry.
STOP mode Entering sequence is as follows
1. Set the STOP Mode bit (by the main CPU)
2. System controller requests bus controller to finish bus transactions of ARM Core.
3. System controller disable ARM clock after getting ARM Down acknowledge.
4. System controller requests bus controller to finish current transactions.
5. Bus controller send acknowledge to system controller after completed bus transactions.
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-15
6. System controller request memory controller to enter self refresh mode. It is for preserving contents in
SDRAM.
7. System controller wait for self refresh acknowledge from memory controller.
8. After receiving the self-refresh acknowledge, system controller disables system clocks, and switches
SYSCLK’s source to MPLL reference clock.
9. Disables PLLs and Crystal(XTI) oscillation. If OSC_EN_STOP bit in PWRCFG register is ‘high’ then system
controller doesn’t disable crystal oscillation.
10. When PWRMODE[18] register is configured as ‘1’ (Deep-STOP Enabled), ARM_PWRENn signal change to
enable ARM power gating. ARM Core is reset state during STOP mode.
STOP mode Exiting sequence is as follows
1. Enable X-tal Oscillator if it is used, and wait the OSC settle down (around 1ms).
2. After the Oscillator settle-down, the System Clock is fed using the PLL input clock and also enable the PLLs
and waits the PLL locking time
3. Switching the clock source, now the PLL is the clock source.
4. When waking up from Deep-STOP mode, ARM_PWRENn is restored to release ARM power gating. After
producing SYSCLK ARM_RESETn will be released to let ARM work normally.
NOTE
DRAM has to be in self-refresh mode during STOP and SLEEP mode to retain valid memory data. LCD
must be stopped before STOP and SLEEP mode, because DRAM can't be accessed when it is in self-
refresh mode.
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-16
6.2.4 SLEEP MODE
In the SLEEP Mode, all the clock sources are off and also the internal logic-power is not supplied except for the
wake-up logic circuitry. In this mode, the static power-dissipation of internal logic can be minimized.
SLEEP Mode Entering sequence is as follows.
1. User writes command into the system controller’s PWRMODE[15:0] register to let system enter into the
SLEEP Mode.
2. System controller requests bus controller to finish bus transactions of ARM Core.
3. System controller disable ARM clock after getting ARM Down acknowledge.
4. System controller requests bus controller to finish current transactions.
5. Bus controller send acknowledge to system controller after completed bus transactions.
6. System controller request memory controller to enter self refresh mode. It is for preserving contents in
SDRAM.
7. System controller wait for self refresh acknowledge from memory controller.
8. After receiving the self-refresh acknowledge, System controller disable system clocks(HCLK, PCLK and so
on).
9. System controller asserts control signals to mask unknown state of ALIVE logics and to preserve data of
retention Pads.
10. System controller asserts PWR_EN pin and disables the X-tal and PLL oscillation. PWR_EN pin is used to
indicate the readiness for external power OFF and to enable and disable of of the power regulator which
produces internal-logic power.
SLEEP Mode Exiting sequence is as follows.
1. System controller enable external power source by deactivation of the PWR_EN pin and wait power settle
down time (it is programmable by a register in the PWRSETCNT field of RSTCON register).
2. System controller asserts HRESETn and consequently all bus down, self refresh requests and acknowledge
signals will be their reset state.
3. System controller release the HRESETn(synchronously, relatively to the system clock) after the power supply
is stabilized.
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-17
a
Figure 2-11. Entering STOP Mode and Exiting STOP Mode (wake-up)
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-18
Wake-up event
ARM Down Req. & Ack.
ARMCLK
SYSCLK
DRAM Self Refresh
Req. & Ack.
PWR_EN
SLEEP mode is initiated
CKE (DRAM)
BUS Down Req. & Ack.
Figure 2-12. Entering SLEEP Mode and Exiting SLEEP Mode (wake-up)
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-19
6.3 WAKE-UP EVENT
When S3C2450 wakes up from the STOP Mode by an External Interrupt, a RTC alarm interrupt and other
interrupts, the PLL is turned on automatically. The initial-state of S3C2450 after wake-up from the SLEEP Mode is
almost the same as the Power-On-Reset state except for the contents of the external DRAM is preserved. In
contrast, S3C2450 automatically recovers the previous working state after wake-up from the STOP Mode. The
following table shows the states of PLLs and internal clocks after wake-ups from the power-saving modes.
Table 2-7. The Status of PLL and ARMCLK After Wake-up
Mode before
wake-up PLL on/off after
wake-up SYSCLK after wake-up
and before the lock time SYSCLK after the lock
time by internal logic
IDLE Unchanged PLL output PLL output
STOP
PLL state ahead of
entering STOP mode
(PLL ON or not)
PLL reference clock
SYSCLK ahead of entering
STOP mode
(PLL output or not)
SLEEP Off PLL reference clock PLL reference(input) clock
6.4 OUTPUT PORT STATE AND STOP AND SLEEP MODE
Refer to GPIO chapter.
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-20
6.5 POWER SAVING MODE ENTERING/EXITING CONDITION
Table 2-8 shows that Power Saving mode state and Entering or Exiting condition. In general, the entering
conditions are set by the main CPU.
Pleas refer to power-related registers(PWRMODE, PWRCFG and WKUPSTAT) before adopting power saving
scheme on your system.
In dealing with sleep mode, It is good for you to know following two restrictions. To enter sleep mode by
BATT_FLT, you have to configure BATF_CFG bits of PWRCFG register. Not to exit from sleep mode when
BATT_FLT is LOW, you have to configure SLEEP_CFG bit of PWRCFG register.
Table 2-8. Power Saving Mode Entering/Exiting Condition
Power down mode Enter Exit
Clock Gating at NORMAL Clear a respective clock
on/off bit for each IP to save
power.
Set a respective clock on/off bit for each IP to
operate normally
IDLE STANDBYWFI
1. All interrupt sources
2. RTC alarm
3. RTC Tick
4. BATT_FLT
STOP CMD
1. EINT[15:0] (External Interrupt)
2. RTC alarm
3. RTC Tick
4. BATT_FLT
SLEEP CMD
1. EINT[15:0] (External Interrupt)
2. RTC alarm
3. RTC Tick
4. BATT_FLT
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-21
7 REGISTER DESCRIPTIONS
The system controller registers are divided into seven categories; clock source control, clock control, power
management, reset control, system controller status, bus configuration, and misc. The following section will
describe the behavior of the system controller.
7.1 ADDRESS MAP
Table 2-9 summarizes the address map of the system controller.
Table 2-9. System Controller Address Map
Register Address R/W Description Alive Reset Value
LOCKCON0 0x4C00_0000 R/W MPLL lock time count register X 0x0000_FFFF
LOCKCON1 0x4C00_0004 R/W EPLL lock time count register X 0x0000_FFFF
OSCSET 0x4C00_0008 R/W Oscillator stabilization control register O 0x0000_8000
MPLLCON 0x4C00_0010 R/W MPLL configuration register X 0x0185_40C0
EPLLCON 0x4C00_0018 R/W EPLL configuration register X 0x0120_0102
EPLLCON_K 0x4C00_001C R/W EPLL configuration register for K value X 0x0000_0000
CLKSRC 0x4C00_0020 R/W Clock source control register X 0x0000_0000
CLKDIV0 0x4C00_0024 R/W Clock divider ratio control register0 X 0x0000_000C
CLKDIV1 0x4C00_0028 R/W Clock divider ratio control register1 X 0x0000_0000
CLKDIV2 0x4C00_002C R/W Clock divider ratio control register2 X 0x0000_0000
HCLKCON 0x4C00_0030 R/W HCLK enable register X 0xFFFF_FFFF
PCLKCON 0x4C00_0034 R/W PCLK enable register X 0xFFFF_FFFF
SCLKCON 0x4C00_0038 R/W Special clock enable register X 0xFFFF_DFFF
PWRMODE 0x4C00_0040 R/W Power mode control register X 0x0000_0000
SWRST 0x4C00_0044 R/W Software reset control register X 0x0000_0000
BUSPRI0 0x4C00_0050 R/W Bus priority control register 0 X 0x0000_0000
PWRCFG 0x4C00_0060 R/W
Power management configuration
register O 0x0000_0000
RSTCON 0x4C00_0064 R/W Reset control register O 0x0006_0101
RSTSTAT 0x4C00_0068 R Reset status register O 0x0000_0001
WKUPSTAT 0x4C00_006C R/W Wake-up status register O 0x0000_0000
INFORM0 0x4C00_0070 R/W SLEEP mode information register 0 O 0x0000_0000
INFORM1 0x4C00_0074 R/W SLEEP mode information register 1 O 0x0000_0000
INFORM2 0x4C00_0078 R/W SLEEP mode information register 2 O 0x0000_0000
INFORM3 0x4C00_007C R/W SLEEP mode information register 3 O 0x0000_0000
USB_PHYCTRL 0x4C00_0080 R/W USB PHY control register X 0x0000_0000
USB_PHYPWR 0x4C00_0084 R/W USB PHY power control register X 0x0000_0000
USB_RSTCON 0x4C00_0088 R/W USB PHY reset control register X 0x0000_0000
USB_CLKCON 0x4C00_008C R/W USB PHY clock control register X 0x0000_0000
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
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8 INDIVIDUAL REGISTER DESCRIPTIONS
8.1 CLOCK SOURCE CONTROL REGISTERS
(LOCKCON0, LOCKCON1, OSCSET, MPLLCON, AND EPLLCON)
The six registers control two internal PLLs and an external oscillator. The output frequency of the PLL is
determined by the divider values of MPLLCON and EPLLCON. The stabilization time for PLLs and the oscillator is
controlled by LOCKCON0/1 and OSCSET, respectively.
Register Address R/W Description Reset Value
LOCKCON0 0x4C00_0000 R/W MPLL lock time count register 0x0000_FFFF
LOCKCON1 0x4C00_0004 R/W EPLL lock time count register 0x0000_FFFF
OSCSET 0x4C00_0008 R/W Oscillator stabilization control register 0x0000_8000
MPLLCON 0x4C00_0010 R/W MPLL configuration register 0x0185_40C0
EPLLCON 0x4C00_0018 R/W EPLL configuration register 0x0120_0102
EPLLCON_K 0x4C00_001C R/W EPLL configuration register for K value 0x0000_0000
Conventional PLL requires stabilization duration after the PLL is ON. The duration can be varied according to the
device variation. Thus, software must adjust these fields with appropriate values in the LOCKCON0/1 register
whose values mean the number of the external reference clock.
LOCKCON0 Bit Description Initial Value
RESERVED [31:16] RESERVED 0x0000
M_LTIME [15:0]
MPLL lock time count value for ARMCLK, HCLK, and PCLK
Typically, M_LTIME must be longer than 300 usec. 0xFFFF
LOCKCON1 Bit Description Initial Value
RESERVED [31:16] RESERVED 0x0000
E_LTIME [15:0]
EPLL lock time count value for UARTCLK, SPICLK and etc.
Typically, E_LTIME must be longer than 300 usec. 0xFFFF
In general, an oscillator requires stabilization time. This register specifies the duration based on the reference
clock.
OSCSET Bit Description Initial Value
RESERVED [31:0] RESERVED 0x0000
XTALWAIT [15:0]
Crystal oscillator settle-down wait time, this value is valid
when s3c2450 is wakeup by stop mode 0x8000
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-23
MPLLCON Bit Description Initial Value
RESERVED [31:26] - 0x00
MPLLEN_STOP [25] MPLL ON/OFF in STOP mode. 0:OFF, 1:ON 0
ONOFF [24] MPLL ON/OFF. 0:ON, 1:OFF 1
MDIV [23:14] Main divider value of MPLL 0x215
RESERVED [13:11] - 0x0
PDIV [10:5] Pre-divider value of MPLL 0x6
RESERVED [4:3] - 0x0
SDIV [2:0] Post-divider value of MPLL 0x0
The output frequencies of MPLL can be calculated using the following equations:
FOUT = (m x FIN) / (p x 2S) (should be 40~1600MHz)
Fvco = (m x FIN) / p (should be 800~1600MHz)
where, m = MDIV, p = PDIV, s = SDIV, Fin = 10~30Mhz
Don't set the value PDIV[5:0] or MDIV[9:0] to all zeros. (6’b00 0000 / 10’b00 0000 0000)
NOTE
Although there is the equation for choosing PLL value, we strongly recommend only the values in the PLL
value recommendation table. If you have to use other values, please contact us.
FIN
(MHz)
Target FOUT
(MHz)
MDIV
(decimal)
PDIV
(decimal)
SDIV
(decimal) Duty
12 240 320 4 2 40~60%
12 400 400 3 2 40~60%
12 450 225 3 1 40~60%
12 500 250 3 1 40~60%
12 534 267 3 1 40~60%
12 600 300 3 1 40~60%
12 800 400 3 1 40~60%
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-24
EPLLCON Bit Description Initial Value
RESERVED [31:26] - 0x00
EPLLEN_STOP [25] EPLL ON/OFF in STOP mode. 0:OFF, 1:ON 0
ONOFF [24] EPLL ON/OFF. 0:ON, 1:OFF 1
MDIV [23:16] EPLL main divider value 0x20
RESERVED [15:14] - 0x0
PDIV [13:8] EPLL pre-divider value 0x1
RESERVED [7:3] - 0x00
SDIV [2:0] EPLL post-scaler value 0x2
EPLLCON_K Bit Description Initial Value
RESERVED [31:16] - 0
KDIV [15:0] EPLL fractional modulator 0x0000
The output frequencies of EPLL can be calculated using the following equations:
FOUT = ((m+k/216 )× FIN) / (p × 2s) (should be 20~600MHz)
Fvco = (m x FIN) / p
where, m = MDIV, p = PDIV, s =SDIV, k = KDIV Fin = 10~40MHz
Don't set the value PDIV[5:0] or MDIV[7:0] to all zeros. (6’b00 0000 / 8’b0000 0000)
NOTE
Although there is the equation for choosing PLL value, we strongly recommend only the values in the PLL
value recommendation table. If you have to use other values, please contact us.
FIN
(MHz) FOUT
(MHz) MDIV
(decimal) PDIV
(decimal) SDIV
(decimal) KDIV
(decimal) Error [MHz]
12 36 48 1 4 0 0
12 48 32 1 3 0 0
12 60 40 1 3 0 0
12 72 48 1 3 0 0
12 84 28 1 2 0 0
12 96 32 1 2 0 0
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-25
8.2 CLOCK CONTROL REGISTER (CLKSRC, CLKDIV, HCLKCON, PCLKCON, AND SCLKCON)
The clock generator within the system controller has many dividers and MUXs to generate appropriate clocks.
These clocks are controlled by the clock control registers as described in here.
Register Address R/W Description Reset Value
CLKSRC 0x4C00_0020 R/W Clock source control register 0x0000_0000
CLKDIV0 0x4C00_0024 R/W
Clock divider ratio control
register0 0x0000_000C
CLKDIV1 0x4C00_0028 R/W
Clock divider ratio control
register1 0x0000_0000
CLKDIV2 0x4C00_002C R/W
Clock divider ratio control
register2 0x0000_0000
HCLKCON 0x4C00_0030 R/W HCLK enable register 0xFFFF_FFFF
PCLKCON 0x4C00_0034 R/W PCLK enable register 0xFFFF_FFFF
SCLKCON 0x4C00_0038 R/W Special clock enable register 0xFFFF_DFFF
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-26
The CLKSRC selects the source input of the clocks.
CLKSRC Bit Description Initial Value
RESERVED [31:21] - 0x0_0000
SEL_CAMCLK [20] Source clock of CAMCLK divider
0 = EPLL, 1 = HCLK 0
SELHSSPI1 [19]
HS-SPI0 clock
0 = EPLL (divided), 1 = MPLL (divided) 0
SELHSSPI0 [18]
HS-SPI0 clock
0 = EPLL (divided), 1 = MPLL (divided) 0
SELHSMMC1 [17]
HSMMC1 clock
0 = EPLL (divided), 1 = EXTCLK 0
SELHSMMC0 [16]
HSMMC0 clock
0 = EPLL (divided), 1 = EXTCLK 0
SELI2S [15:14]
I2S clock source selection
00 = divided clock of EPLL, 01 = external I2S clock
1X = EpllRefClk
0x0
SELI2S_1 [13:12]
I2S_1 clock source selection
00 = divided clock of EPLL, 01 = external I2S clock
1X = EpllRefClk
0x0
RESERVED [11:9] - 0
SELESRC [8:7]
Selection EPLL reference clock
10 = XTAL, 11 = EXTCLK
0x = identical to that of MPLL reference clock
Do not configure SELESRC & SELEPLL register simultaneously.
00
SELEPLL [6]
EsysClk selection
0 = EPLL reference clock, 1 = EPLL output 0
RESERVED [5] - 0
SELMPLL [4]
MSYSCLK selection
0 = MPLL reference clock (produced through clock divider)
1 = MPLL output
0
SELEXTCLK [3]
Configure MPLL reference clock divider
0 = don’t use MPLL reference clock divider (means 1/1 divide ratio)
1 = use MPLL reference clock divider (See EXTDIV field of
CLKDIV)
0
RESERVED [2:0] - 0x0
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-27
The CLKDIV0 configures the division ratio of each clock generator. The operating speed of ARM can be slow to
reduce the overall power dissipation, if software doest not require full operating performance. In this case, the
power dissipation due to the ARM core can be reduced if the DVS field is ON. The set of DVS field makes that the
operating frequency of ARM is the same as system operating clock (HCLK).
CLKDIV0 Bit Description Initial Value
RESERVED [31:14] - 0x0
DVS [13]
Enable/disable DVS (Dynamic Voltage Scaling) feature
0 = Disable
1 = Enable (The frequency of ARMCLK is the same frequency of
HCLK regardless of ARMDIV field.)
0
RESERVED [12] - 0
ARMDIV [11:9]
ARM clock divider ratio
ARMDIV values are recommended as below.
1/1 = 3'b000
1/2 = 3'b001
1/3 = 3'b010
1/4 = 3'b011
1/6 = 3'b101
1/8 = 3'b111
0x0
EXTDIV [8:6]
External clock divider ratio
ratio = (MPLL reference clock) / (EXTDIV*2 + 1) 0
PREDIV [5:4]
Pre Divider for HCLK
PREDIV value should be one of 0,1,2,3
Output frequency of PREDIVIDER should be less than 266MHz
0
HALFHCLK [3]
HCLKx1_2(SSMC) clock divider ratio, 0 = HCLK, 1 = HCLK/2
User also has to configure SSMC’s special register which related
with half clock.
1
PCLKDIV [2]
PCLK clock divider ratio, 0 = HCLK, 1 = HCLK / 2 1
HCLKDIV [1:0]
HCLK clock divider ratio
HCLKDIV value should be one of 0,1,3. (2'b10 is invalid) 0x0
ARMCLK Ratio = (ARMDIV+1).
HCLK Ratio = (PREDIV+1) * (HCLKDIV + 1)
Restrictions about changing ARMDIV register.
1. Be careful that ARMCLK should be equal or faster than HCLK. (X times, X is integer)
2. Change PREDIV, HCLKDIV field after 12 HCLK periods as soon as nRESET is released.
Basically, Changing ARMDIV and HCLKDIV simultaneously is supported. When modifying ARMDIV, PREDIV and
HCLKDIV, User should pay attention to obey upper No 1 restriction.
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-28
CLKDIV1 configures the clock ratio related on EPLL.
CLKDIV1 Bit Description Initial Value
RESERVED [31:30] - 0
CAMDIV [29:26]
CAM clock divider ratio.
ratio = CAMDIV + 1 0x0
SPIDIV_0 [25:24] HS-SPI clock divider ratio, ratio = (SPIDIV +1) 0x0
DISPDIV [23:16]
Display controller clock divider ratio,
ratio = (DISPDIV + 1) 0x0
I2SDIV_0 [15:12] I2S0 clock divider ratio, ratio = (I2SDIV_0 + 1) 0x0
UARTDIV [11:8] UART clock divider ratio, ratio = (UARTDIV + 1) 0x0
HSMMCDIV_1 [7:6] HSMMC_1 clock divider ratio, ratio = (HSMMCDIV_1 + 1) 0x0
USBHOSTDIV [5:4] Usb Host clock divider ratio, ratio = (USBHOSTDIV + 1) 0x0
RESERVED [3:0] - 0
CLKDIV2 configures the clock ratio related on EPLL or MPLL.
CLKDIV2 Bit Description Initial Value
RESERVED [31:26] - 0
SPIDIV1_EPLL [25:24] HS-SPI_1 clock divider ratio(EPLL), ratio = (SPIDIV_1 +1) 0x0
RESERVED [23:21] - 0
SPIDIV1_MPLL [20:16] HS-SPI1 clock divider ratio(MPLL), ratio = (SPIDIV_1 +1) 0
I2SDIV_1 [15:12] I2S1 clock divider ratio(EPLL), ratio = (I2SDIV_1 + 1) 0x0
RESERVED [11:8] - 0
HSMMCDIV_0 [7:6] HSMMC_0 clock divider ratio(EPLL), ratio = (HSMMCDIV_1 + 1) 0x0
RESERVED [5] - 0
SPIDIV0_MPLL [4:0] HS-SPI0 clock divider ratio(MPLL), ratio = (SPIDIV_1 +1) 0
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-29
The AHB and APB clocks are en/disabled by HCLKCON register. All reserved bits have 1 value at initial state.
HCLKCON Bit Description Initial Value
RESERVED [31:21] - 0x7FF
2D [20] Enable HCLK into 2D 1
DRAMC [19] Enable HCLK into DRAM controller 1
SSMC [18] Enable HCLK into the SSMC block 1
CFC [17] Enable HCLK into the CF 1
HSMMC1 [16] Enable HCLK into the HSMMC1 1
HSMMC0 [15] Enable HCLK into the HSMMC0 1
RESERVED [14] - 1
IROM [13] Enable HCLK into the IROM 1
USBDEV [12] Enable HCLK into the USB device 1
USBHOST [11] Enable HCLK into the USB HOST 1
RESERVED [10] - 1
DISPCON [9] Enable HCLK into the display controller 1
CAMIF [8] Enable HCLK into the camera interface 1
DMA0~7 [7:0] Enable HCLK into DMA channel 0~7 0xFF
PCLKCON Bit Description Initial Value
RESERVED [31:20] - 0xFFF
PCM [19] Enable PCLK into the PCM 1
RESERVED [18] - 1
I2S_1 [17] Enable PCLK into the I2S_1 1
I2C_1 [16] Enable PCLK into the I2C_1 1
CHIP_ID [15] Enable PCLK into the CHIP_ID 1
SPI_HS_1 [14] Enable PCLK into the SPI_HS1 (into SPI2.0) 1
GPIO [13] Enable PCLK into the GPIO 1
RTC [12] Enable PCLK into the RTC 1
WDT [11] Enable PCLK into the watch dog timer 1
PWM [10] Enable PCLK into the PWM 1
I2S_0 [9] Enable PCLK into the I2S_0 (I2S Æ I2S0) 1
AC97 [8] Enable PCLK into the AC97 1
TSADC [7] Enable PCLK into the TSADC 1
SPI_HS_0 [6] Enable PCLK into the SPI_HS0 (HS Æ HS0) 1
RESERVED [5] - 1
I2C_0 [4] Enable PCLK into the I2C_0 (I2C Æ I2C0) 1
UART0~3 [3:0] Enable PCLK into the UART0~3 0xF
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-30
The special clocks are controlled by SCLKCON register. Some blocks in the device require several operating
frequencies, i.e., 48 MHz and 24 MHz for USB interface block. Thus, these output frequencies can be controlled
by the CLKDIV values.
SCLKCON Bit Description Initial
Value
RESERVED [31:21] - 0x7FF
SPICLK_MPLL1 [20] Enable SPICLK1 (MPLL) 1
SPICLK_MPLL0 [19] Enable SPICLK0 (MPLL) 1
PCM1_EXT [18] Enable PCM1 External Clock 1
PCM0_EXT [17] Enable PCM0 External Clock 1
DDRCLK(Hx2CLK) [16] Enable DDRCLK 1
SSMCCLK(HX1_2CLK) [15] Enable SSMCCLK 1
SPICLK_0 [14] Enable HS-SPI_0 (EPLL) clock 1
HSMMCCLK_EXT [13]
Enable HSMMC_EXT clock for HSMMC0, 1 (EXTCLK)
Reference clock of MPLL 0
HSMMCCLK_1 [12]
Enable HSMMC1_1 clock for
(from EPLL or USB48M output) 1
CAMCLK [11] Enable CAM clock 1
DISPCLK [10] Enable display controller clock 1
I2SCLK_0 [9] Enable I2S_0 clock 1
UARTCLK [8] Enable UART clock 1
SPICLK_1 [7] Enable HS-SPI_1 (EPLL) clock 1
HSMMCCLK_0 [6]
Enable HSMMC_0 clock for
(from EPLL or USB48M output) 1
I2SCLK_1 [5] Enable I2S_1 clock 1
RESERVED [4:2] - 0x7
USB HOST [1] Enable USB HOST clock 1
RESERVED [0] - 1
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-31
8.3 POWER MANAGEMENT REGISTERS (PWRMODE AND PWRCFG)
If you want to change the power management mode, you just write a bit(s) into PWRMODE register. Before
writing, you must configure condition to wake-up from the power down mode.
Register Address R/W Description Reset Value
PWRMODE 0x4C00_0040 R/W Power mode control register 0x0000_0000
PWRCFG 0x4C00_0060 R/W Power management configuration register 0x0000_0000
S3C2450 consists of three power-down modes, which are IDLE, (Deep)STOP, and SLEEP. The mode transition
from the NORMAL mode occurs when the appropriate value is written into PWRMODE & PWRCFG register. If
software tries to write illegal value, i.e., tries to set multiple power modes concurrently, then the write operation will
be ignored.
PWRMODE Bit Description Initial Value
RESERVED [31:17] RESERVED 0
STOP [16]
The system enters into STOP mode when this field is set to
‘1’. 0
SLEEP [15:0]
The system enters into SLEEP mode when this field is set to
‘0x2BED’. The bit pattern, ‘0x2BED’, represents “Go To BED”. 0
PWRCFG register controls the configuration of power mode transition.
PWRCFG Bit Description Initial Value
RESERVED [31:18] - 0x0000
STANDBYWFI_EN [17] Enable entering of IDLE mode by STANDBYWFI.
0 = Disable, 1 = Enable 0
DEEP-STOP [16]
Enable the system enters DEEP-STOP mode.
If user set 16th register of PWRMODE reg. (ie. STOP) while
this bit is configured to ‘1’, the system enters DEEP-STOP
mode not STOP mode. To enter the DEEP-STOP mode
properly, this bit should be configured prior to setting STOP
mode bit.
0
SLEEP_CFG [15]
Enable wakeup source
0 = Wakeup sources are enabled depending on BATT_FLT in
sleep mode. If BATT_FLT pin is asserted logic ‘1’ system can
be exit from sleep mode by appropriate wakeup sources. If
not, system continuously remain it’s sleep state.
1 = Enable wakeup sources regardless of BATT_FLT in sleep
mode.
0
RESERVED [14:10] - 0x00
NFRESET_CFG [9]
Reset configuration when internal resets is generated
0 = Reset NAND flash controller.
1 = Do not reset NAND flash controller.
0
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-32
PWRCFG Bit Description Initial Value
RTC_CFG [8]
Configure RTC alarm interrupt wakeup mask
0 = Wake-up signal event is generated when RTC alarm
occurs.
1 = Mask RTC alarm interrupt
0
RTCTICK_CFG [7]
Configure RTC Tick interrupt wakeup mask
0 = wake-up signal event is generated when RTC Tick occurs.
1 = mask RTC alarm interrupt
0
RESERVED [6:5] These bits must be 0b’00 0
nSW_PHY_
OFF_USB [4]
Power on/off of USB PHY.
(See USB manual to get more details.)
0: OFF
1: ON
0
OSC_EN_SLP [3]
Crystal oscillator enable bit in SLEEP mode
0 = Disable in SLEEP mode, 1 = Enable in SLEEP mode 0
OSC_EN_STOP [2]
Crystal oscillator enable bit in STOP mode
0 = Disable in STOP mode, 1 = Enable in STOP mode 0
BATF_CFG [1:0]
Configure BATT_FLT operation
00, 10 = Ignore,
01 = Generate interrupt in idle mode, It can be used as a
wakeup source in stop and sleep mode when BATT_FLT is
asserted (active LOW)
11 = Reserved (Please don’t use)
0x0
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-33
8.4 RESET CONTROL REGISTERS (SWRST AND RSTCON)
Software can reset S3C2450 using SWRST register. The waveform of the reset signals are determined by
RSTCON register.
Register Address R/W Description Reset Value
SWRST 0x4C00_0044 R/W Software reset control register 0x0000_0000
RSTCON 0x4C00_0064 R/W Reset control register 0x0006_0101
When software write the predefined value, 0x533C2450, into SWRST register, then the system controller asserts
internal reset signal and initializes internal state.
SWRST Bit Description Initial Value
SWRST [31:0] If this field has 0x533C2450, then the system will restart. 0x0000_0000
RSTCON register controls the duration of the system reset signal.
RSTCON Bit Description Initial Value
RESERVED [31:19] - 0x0000
RESERVED [18:17] Should be set ‘0x3’ 0x3
PWROFF_SLP [16]
Power Control on pad retention cell I/O.
Retention cell I/O’s power will be off when sleep mode, but
when wakeup process starts, User should write ‘1’ to produce
power on retention I/O (see below detailed description)
1 = set automatically when sleep mode.
0 = cleared by user writing ‘1’
0
RSTCNT [15:8]
Only watch dog and software reset can start counter which is
counted from RSTCNT value. This RSTCNT value effects
delay of releasing reset. After this counter expired, internal
reset (like HRESETn) will be HIGH state.
Range which user can configure is from 0x01 to 0xFE.
(Don’t write 0xFF to this field)
0x01
PWRSETCNT [7:0]
This field configures value of Power Settle Down Counter.
Only When waking up from sleep mode, Power Settle Down
Counter starts counting to wait for stability of external voltage
source. As soon as counter reaches PWRSETCNT value, the
system escapes from sleep mode.
Range which user can configure is from 0x01 to 0xFE.
(Don’t write 0xFF to this field)
Real count number = (PWRSETCNT[7:0] + 1) * 2048
0x01
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-34
8.5 CONTROL OF RETENTION PAD(I/O) WHEN NORMAL MODE AND WAKE-UP FROM SLEEP MODE.
Figure 2-13. Usage of PWROFF_SLP
S3C2450 has a lot of retention PADs. Retention pad’s ability is remaining data when internal logic power is off. In
normal mode, PWROFF_SLP signal which from RSTCON register can control about PAD output. If SLP_IN signal
has LOW value, data assigned to specific PAD go out through level shifter and latch. Otherwise If SLP_IN signal
has HIGH value, output of level shifter cannot pass therefore retention PAD produces latched data only.
When the system enters into a sleep mode, SLP_IN value has HIGH value as a result of PWROFF’s HIGH state.
Futhermore, PWROFF_SLP register bit is automatically set to 1’b1.
When the system wakeup from sleep mode, SLP_IN still remains HIGH state until user configure PWROFF_SLP
bit as 1’b0. Therfore, user has to configure PWROFF_SLP bit to produce internal logic data through PAD after
waking up from sleep mode.
Pin lists that are not affected by PWROFF_SLP
OM[4:0], EINT[15:0], AIN[9:0],
Vref, DM_UDEV, DP_UDEV, REXT, X0_UDEV, X1_UDEV,
nTRST, TMS, TCK, TDI, TDO,
XTOpll, XTIpll, MPLLCAP, EPLLCAP,
XTRrtc, XTOrtc, nRESET, nRSTOUT, PWREN, BATT_FLT, EXTCLK,
GPF, GPG[7:0]
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-35
8.6 SYSTEM CONTROLLER STATUS REGISTERS (WKUPSTAT AND RSTSTAT)
Software must know the status of the system controller after wakeup or reset. WKUPSTAT and RSTSTAT
registers store the information.
Register Address R/W Description Reset Value
RSTSTAT 0x4C00_0068 R Reset status register 0x0000_0001
WKUPSTAT 0x4C00_006C R/W Wake-up status register 0x0000_0000
After S3C2450 is re-set or woken-up, the following two registers store the source of the activation. The value of
RSTSTAT register is cleared by the other reset. If each bit has ‘1’ value, resets or wakeup events are occurred.
The reset priority is as follows: nRESET > WDTRST > SLEEP > DEEP-STOP > SW Reset
RSTSTAT Bit Description Initial Value
RESERVED [31:6] - 0x0000_000
SWRST [5] Reset by software (see SWRST register) 0
DEEP-STOP [4] Wakeup from DEEP-STOP (ARM Reset only) 0
SLEEP [3]
Wakeup from RTC_TICK, RTC_ALARM, EINT and battery fault
from power-down mode. (Reset by waking-up from SLEEP mode) 0
WDTRST [2] Reset by Watch-dog reset 0
RESERVED [1] - 0
EXTRST [0] External reset by nRESET pin 1
WKUPSTAT register indicates that which source was used for changing system state into normal mode from idle,
stop and sleep mode. The value of WKUPSTAT register can be cleared by writing ‘1’.
WKUPSTAT Bit Description Initial Value
RESERVED [31:6] - 0x0000_000
BATF [5]
Waked-up by BATT_FLT assertion. This field is valid when
PWRCFG[1:0] = 2’b01 0
RTC_TICK [4] Waked-up by RTC tick 0
RESERVED [3:2] - 0x0
RTC [1] Waked-up by RTC alarm 0
EINT [0] Waked-up by external interrupts 0
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-36
8.7 BUS CONFIGURATION REGISTER (BUSPRI0, BUSPRI1, AND BUSMISC)
To improve AHB bus performance, software must control the arbitration scheme and type.
Register Address R/W Description Reset Value
BUSPRI0 0x4C00_0050 R/W Bus priority control register 0 0x0000_0000
S3C2450 consists of 2 hierarchical AHB buses. The arbitration priority and order can be configured with BUSPRI0
registers. You can see specific priority number that assigned to each AMBA master in User’s Manual section ‘04-
BUS PRIORITIES’. The number of masters of AHB-S and AHB-I bus is 16 and 9 respectively.
Each TYPE field of BUSPRI0 register has three possible choices as follows:
1. 2’b00: the fixed type
2. 2’b01: the last granted maser has the lowest priority
3. 2’b10: the rotated type
4. 2’b11: undefined
BUSPRI0 Bit Description Initial
Value
RESERVED [31:16] - 0x0000
TYPE_S [15:14] Priority type for AHB-System bus 0x0
RESERVED [13:12] - 0x0
ORDER_S
[11:8]
Fixed priority order for AHB-S bus
Value Priority Value Priority
4’h0 0-1-2-3-4-5-6-7-8-9-10-
11-12-13-14-15 4’h8 8-9-10-11-12-13-14-15-0-
1-2-3-4-5-6-7
4’h1 1-2-3-4-5-6-7-8-9-10-11-
12-13-14-15-0 4’h9 9-10-11-12-13-14-15-0-1-
2-3-4-5-6-7-8
4’h2 2-3-4-5-6-7-8-9-10-11-12-
13-14-15-0-1 4’ha 10-11-12-13-14-15-0-1-2-
3-4-5-6-7-8-9
4’h3 3-4-5-6-7-8-9-10-11-12-0-
1-2 4’hb 11-12-13-14-15-0-1-2-3-
4-5-6-7-8-9-10
4’h4 4-5-6-7-8-9-10-11-12-13-
14-15-0-1-2-3 4’hc 12-13-14-15-0-1-2-3-4-5-
6-7-8-9-10-11
4’h5 5-6-7-8-9-10-11-12-13-14-
15-0-1-2-3-4 4’hd 13-14-15-0-1-2-3-4-5-6-
7-8-9-10-11-12
4’h6 6-7-8-9-10-11-12-13-14-
15-0-1-2-3-4-5 4’he 14-15-0-1-2-3-4-5-6-7-8-
9-10-11-12-13
4’h7 7-8-9-10-11-12-13-14-15-
0-1-2-3-4-5-6 4’hf 15-0-1-2-3-4-5-6-7-8-9-
10-11-12-13-14
0x0
TYPE_I [7:6] Priority type for AHB-Image bus 0x0
RESERVED [5:3] - 0x0
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-37
BUSPRI0 Bit Description Initial
Value
ORDER_I
[2:0]
Fixed priority order for AHB-I bus
Value Priority Value Priority
3’b000 0-1-2-3-4-5-6-7 3’b100 4-5-6-0-1-2-3-7
3’b001 1-2-3-4-5-6-0-7 3’b101 5-6-0-1-2-3-4-7
3’b010 2-3-4-5-6-0-1-7 3’b110 6-0-1-2-3-4-5-7
3’b011 3-4-5-6-0-1-2-7 3’b111 undefined
0x0
8.8 INFORMATION REGISTER 0,1,2,3
Register Address R/W Description Reset Value
INFORM0 0x4C00_0070 R/W SLEEP mode information register 0 0x0000_0000
INFORM1 0x4C00_0074 R/W SLEEP mode information register 1 0x0000_0000
INFORM2 0x4C00_0078 R/W SLEEP mode information register 2 0x0000_0000
INFORM3 0x4C00_007C R/W SLEEP mode information register 3 0x0000_0000
INFORM0~3 registers retain their contents during SLEEP mode. Thus, if you want to reserve some important data
during SLEEP mode, you can use these registers.
INFORM0~3 Bit Description Initial Value
DATA [31:0] User specific information 0x0000_0000
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-38
8.9 USB PHY CONTROL REGISTER (PHYCTRL)
Register Address R/W Description Reset Value
PHYCTRL 0x4C00_0080 R/W USB2.0 PHY Control Register 0x0000_0000
PHYCTRL Bit Description Initial State
RESERVED [31:6] - 0
CLK_ON_OFF [5] Clock input on off control at pad input area
Should be use with EXT_CLK [2].
When Combination of [5],[2] bit is 2’b11 , could be off clock
input.
00 = Crystal Enable,
01 = Oscillator Enable,
11 = Crystal/Oscillator Disable(PAD Disable),
10 = reserved
0
CLK_SEL [4:3] Reference Clock Frequency Select
00 = 48MHz
01 = Reserved
10 = 12MHz
11 = 24MHz
2’b00
EXT_CLK [2] Clock Select
0 = Crystal
1 = Oscillator
0
INT_PLL_SEL [1] Host 1.1 uses which PLL Clock (48MHz)
0 = use EPLL
(USBHOSTCLK should be 48MHz and The CLK_SEL[1:0]
must be set to 2’b00)
1 = use USB own Internal PLL Clock
0
DOWNSTREAM_
PORT
[0] Downstream Port Select
0 = Device (Function) Mode
1 = Host Mode
0
S3C2450X RISC MICROPROCESSOR SYSTEM CONTROLLER
2-39
8.10 USB PHY POWER CONTROL REGISTER (PHYPWR)
Register Address R/W Description Reset Value
PHYPWR 0x4C00_0084 R/W USB2.0 PHY Power Control Register 0x0000_0000
PHYCTRL Bit Description Initial State
RESERVED [31:6] Must be zero 0
RESERVED [5:4] Must be 0x3 2’b00
RESERVED [3:1] Must be zero 2’b000
FORCE_ SUSPEND [0] Apply Suspend signal for power save
0 = Disable (Normal Operation)
1 = Enable
0
8.11 USB RESET CONTROL REGISTER (URSTCON)
Register Address R/W Description Reset Value
URSTCON 0x4C00_0088 R/W USB Reset Control Register 0x0000_0000
URSTCON Bit Description Initial State
RESERVED [31:3] - 0
FUNC_RESET [2] Function 2.0 S/W Reset
1 = Reset 0
HOST_RESET [1] Host 1.1 S/W Reset
1 = Reset 0
PHY_RESET [0] PHY 2.0 S/W Reset
The PHY_RESET signal must be asserted for at least 10us
1 = Reset
0
SYSTEM CONTROLLER S3C2450X RISC MICROPROCESSOR
2-40
8.12 USB CLOCK CONTROL REGISTER (UCLKCON)
Register Address R/W Description Reset Value
UCLKCON 0x4C00_008C R/W USB Clock Control Register 0x0000_0000
MSINTEN Bit Description Initial State
DETECT_VBUS [31] VBUS Detect
This VBUS indicator signal indicates that the VBUS signal on
the USB cable is active. For the serial interface, this signal
controls the pull-up resistance on the D+ line in Device mode
only.
1 = Pull-up resistance on the D+ line is enabled based on the
speed of operation.
0 = Pull-up resistance on the D+ line is disabled.
0
RESERVED [30:3] - 0
FUNC_CLK_EN [2] USB 2.0 Function Clock Enable
0 = Disable
1 = Enable
0
HOST_CLK_EN [1] USB 1.1 Host Clock Enable
0 = Disable
1 = Enable
0
RESERVED [0] - 0
S3C2450X RISC MICROPROCESSOR BUS MATRIX & EBI
3-1
3 BUS MATRIX & EBI
1 OVERVIEW
S3C2450 MATRIX provides the interface between dual AHB bus and Memory sub-system. It is used for achieving
high system performance by accessing various kinds of memory (SDRAM, SRAM, Flash Memory, ROM etc) from
different AHB bus (one is for system and the other is for image) at the same time. S3C2450 have two MATRIX
cores because it has two memory ports, and each MATRIX can select the priority between rotation type and fixed
type. User can select which one is excellent for improving system performance.
Matrix Memory Controller & EBI
AHB-S
AHB-I
SFR
MATRIX
CORE0
MATRIX
CORE1
SSMC
NFCON
CFCON
DRAMC
EBI
External Memory
SROM
NFLASH
CF
SDRAM
IROM
Figure 3-1. The Configuration of MATRIX and Memory Sub-System of S3C2450
BUS MATRIX & EBI S3C2450X RISC MICROPROCESSOR
3-2
2 SPECIAL FUNCTION REGISTERS
2.1 MATRIX CORE 0 PRIORITY REGISTER (BPRIORITY0)
Register Address R/W Description Reset Value
BPRIORITY0 0X4E800000 R/W Matrix Core 0 priority control register 0x0000_0004
BPRIORITY0 Bit Description Initial State
PRI_TYP
[2] Priority type
0 = Fixed Type
1 = Rotation Type
1
FIX_PRI_TYP
[0] Priority for the fixed priority type
0 = AHB_S > AHB_I
1 = AHB_I > AHB_S
0
2.2 MATRIX CORE 1 PRIORITY REGISTER (BPRIORITY1)
Register Address R/W Description Reset Value
BPRIORITY1 0X4E800004 R/W Matrix Core 1 priority control register 0x0000_0004
BPRIORITY1 Bit Description Initial State
PRI_TYP
[2] Priority type
0 = Fixed Type
1 = Rotation Type
1
FIX_PRI_TYP
[0] Priority for the fixed priority type
0 = AHB_S > AHB_I
1 = AHB_I > AHB_S
0
S3C2450X RISC MICROPROCESSOR BUS MATRIX & EBI
3-3
2.3 EBI CONTROL REGISTER (EBICON)
Register Address R/W Description Reset Value
EBICON 0X4E800008 R/W EBI control register 0x0000_0004
EBICON Bit Description Initial State
BANK3_CFG [10] Bank3 Configuration
0 = SROM
1 = CF
0
BANK2_CFG [9] Bank2 Configuration
0 = SROM
1 = CF
0
BANK1_CFG [8] Bank1 Configuration
0 = SROM
1 = NAND
0
PRI_TYP
[2] Priority type
0 = Fixed Type
1 = Rotation Type
1
FIX_PRI_TYP
[1:0] Priority for the fixed priority type
0 = SSMC > NFCON > CFCON > ExtBusMaster
1 = SSMC > CFCON > NFCON > ExtBusMaster
2 = SSMC > ExtBusMaster > NFCON > CFCON
3 = ExtBusMaster > SSMC > NFCON > CFCON
00
BUS MATRIX & EBI S3C2450X RISC MICROPROCESSOR
3-4
NOTES
S3C2450X RISC MICROPROCESSOR BUS PRIORITIES
4-1
4 BUS PRIORITIES
1 OVERVIEW
The bus arbitration logic determines the priorities of bus masters. It supports a combination of rotation priority
mode and fixed priority mode.
1.1 BUS PRIORITY MAP
The S3C2450 holds 16 masters on the AHB_S(System Bus), 9 masters on the AHB_I(Image Bus) and 9masters
on the APB Bus. The following list shows the priorities among these bus masters after a reset.
Priority AHB_S BUS MASTERS Comment
0 CF
1 HS-MMC1
2 DMA0
3 DMA1
4 DMA2
5 DMA3
6 DMA4
7 DMA5
8 DMA6
9 DMA7
10 UHOST
11 UDEVICE20
12 HS-MMC0
13 ARM926EJ DBUS
14 ARM926EJ IBUS
15 Default
1. Fix Type: all priority can be changed according to register value
stored in The System Controller.
2 Rotation Type: all masters’ priority can be rotatable according to
register value stored in The System Controller.
(Except for Default Masters)
BUS PRIORITIES S3C2450X RISC MICROPROCESSOR
4-2
Priority AHB_I BUS MASTERS Comment
0 Reserved
1 TFTW1-LCD
2 TFTW2-LCD
3 CAMIF_PREVIEW
4 CAMIF_CODEC
5 CAMIF_PIP
6 2D
7 AHB2AHB
8 Default
1. Fix Type: all priority can be changed according to register value
stored in The System Controller.
2 Rotation Type : all masters’ priority can be rotatable according to
register value stored in The System Controller.
( except for Default Master)
Priority APB BUS MASTERS Comment
0 AHB2APB
1 DMA0
2 DMA1
3 DMA2
4 DMA3
5 DMA4
6 DMA5
7 DMA6
8 DMA7
AHB2APB Bridge Master obtains always highest priority and the
priority of six DMA channels rotate internally.
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-1
5 STATIC MEMORY CONTROLLER (SMC)
1 OVERVIEW
The SMC provides simultaneous support for up to six memory banks (bank0 to bank5) that you can configure
independently. Each memory bank supports:
• SRAM
• ROM
• Flash EPROM
• Burst SRAM, ROM, and flash
• OneNAND
You can configure each memory bank to use 8 or 16-bit external memory data paths. You can configure the SMC
to support either little-endian or big-endian operation. For example, each memory bank can be configured to
support:
• nonburst read and write accesses to high-speed CMOS asynchronous static RAM
• nonburst write accesses, nonburst read accesses, and asynchronous page mode read accesses to fast-boot
block flash memory
• synchronous single and burst read and write accesses to synchronous static RAM.
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-2
2 FEATURE
• Supports asynchronous static memory-mapped devices including RAM, ROM, OneNAND and flash
• Supports synchronous static memory-mapped devices including synchronous burst flash
• Supports asynchronous page mode read operation in non-clocked memory subsystems
• Supports asynchronous burst mode read access to burst mode ROM and flash devices
• Supports synchronous burst mode read, write access to burst mode ROM and flash devices
• Supports 8 and 16-bit data bus
• Address space : Up to 64MB per Bank
• Fixed memory bank start address
• External wait to extend the bus cycle
• Support byte, half-word and word access for external memory
• Programmable wait states, up to 31
• Programmable bus turnaround cycles, up to 15
• Programmable output enable and write enable delays, up to 15
• Configurable size at reset for boot memory bank using external control pins
• Support for interfacing to another memory controller using an External Bus Interface (EBI)
• Multiple memory clock frequencies available, HCLK and HCLK/2
• Eight word, 32-bit, wrapping reads from 16-bit memory
• SMBSTWAIT is synchronous burst wait input that the external device uses to delay a synchronous burst
transfer for bank 0. When this signal is not used, it shall be driven to high.
• nWAIT is wait mode input from external memory controller. Active HIGH or active LOW, as programmed in
the SMC Control Registers for each bank.
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-3
3 BLOCK DIAGRAM
Pad
Interface
SMC Core
TIC Data bus
Interface
SMC
Memory Control Signals
Data and Address Bus
AHB Slave Interface
AHB Slave Interface
Figure 5-1. SMC Block Diagram
AHB Slave
Interface for
Register
Access
AHB Slave
Interface for
Memory
Access
Transfer
State
Machine
Control
Signals
Control
Signals
Synchronizer
Module
nWAIT
SMCANCELWAIT
Pad Interface
Block
Control
Signals
AHB I/F
for SMC SFR
AHB I/F
for SMC MEM
SRAM
MEM I/F
SMBUSGNTEBI
SMBUSREQEBI
Figure 5-2. SMC Core Block Diagram
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-4
3.1 ASYNCHRONOUS READ
Figure 5-3 shows an external memory read transfer with two output enable delay states, WSTOEN = 2, and two
wait states, WSTRD = 2. Four AHB wait states are inserted during the transfer, two for the standard read, and
additional two because of the programmed wait states added.
The PSMAVD signal might be required for synchronous static memory devieces when you use it in asynchronous
mode. You can disable this using the AddrValidReadEn bit in the SMBCRx register. This bit defaults to being set
(enable) to enable a system to boot from synchronous memory. You can then clear it if you do not require it.
When disabled, the signal is driven HIGH continuously.
SMCLK
ADDR
DATA(IN)
Asynchronous Read
nCS
nOE
A
D(A)
WSTRD=2
WSTOEN=2
Figure 5-3. External Memory Two Output Enable Delay State Read
SMCLK
ADDR
DATA ( R )
nCS
nWAIT
A
D(A)
nOE
Figure 5-4. Read Timing Diagram (DRnCS = 1, DRnOWE = 0)
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-5
SMCLK
ADDR
DATA ( R )
nCS
nWAIT
A
D(A)
nOE
Figure 5-5. Read Timing Diagram (DRnCS = 1, DRnOWE = 1)
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-6
3.2 ASYNCHRONOUS BURST READ
The SMC supports sequential access asynchronous burst reads to four or eight consecutive locations in 8 or 16-
bit memories, as set using the BurstLenRead bits of the Control Register SMBCRx. Burst mode is enabled by
setting the Burst Mode bits, BMRead or BMWrite, in the Control register. This feature supports burst mode
devices and increases the bandwidth by using a reduced access time (that you can configure) for the sequential
reads, WSTBRD, following the first read, WSTRD. The chip select and output enable lines are held during the
burst, and only the address changes between subsequent accesses. At the end of the burst the chip select and
output enable lines are deasserted together.
Asynchronous page mode read operation is supported. This is enabled by setting the BMRead bit and by setting
the burst length using BurstLenRead in the SMBCRx register. Sequential bursts of up to four or eight beats are
the only type of access supported for page mode operation.
Figure 5-6 shows an external memory burst read transfer with two initial wait states, and one sequential wait
state. The first read has four AHB wait states inserted, and all additional sequential transfers have only one AHB
wait state.
Asynchronous Burst READ
A
D(A)
SMCLK
ADDR
DATA(IN)
nCS
A+4 A+8 A+C
D(A+4) D(A+8)
WSTRD=2 WSTBRD =1 WSTBRD =1 WWSTBRD =1
Figure 5-6. External Burst ROM with WSTRD=2 and WSTBRD=1 Fixed Length Burst Read
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-7
3.3 SYNCHRONOUS READ/SYNCHRONOUS BURST READ
Single synchronous read operations have the same control signal timing as an asynchronous read operation, but
with different timing requirements for setup and hold relative to the clock. Because the output signals of the SMC
are generated internally from clocked logic, the timing for single synchronous reads is the same as for
asynchronous reads.
Synchronous burst read transfers are performed differently to asynchronous burst reads, because of the internal
address incrementing performed by synchronous burst devices. The PADDR outputs are held with the initial
address value, and the PSMAVD output is asserted during the transfer to indicate that the address is valid.
Four, eight, or continuous synchronous burst lengths are supported, and are controlled by the BurstLenRead bits
in the Bank Control Register SMBCRx when the SyncEnRead and BMRead bits indicate that the device supports
synchronous bursts.
Figure 5-7 shows continuous burst read transfers, where WSTRD = 3 and WSTBRD = 0.
Synchronous Burst READ
SMCLK
ADDR
DATA(IN)
nCS
nOE
SMAVD
D(A) D(A+4) D(A+8) D(A+C)
A
WSTRD=3
Figure 5-7. External Synchronous Fixed Length Four Transfer Burst Read
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-8
3.4 ASYNCHRONOUS WRITE
You can program the delay between the assertion of the chip select and the write enable from 0-15 cycles using
the WSTWEN bits of the Bank Write Enable Assertion Delay Control Register, SMBWSTWENRx. This reduces
the power consumption for memories. The write enable is asserted on the rising edge of nSMMEMCLK, half a
clock after the assertion of chip select.
For most asynchronous memory devices an SMMEMCLK cycle is required before the assertion of nWE otherwise
there is the hazard that nCS changes after nWE. You can add extra cycles before nWE is asserted using the
WSTWEN bits in the Bank Write Enable Assertion Delay Control Registers. For example, setting
WSTWR=WSTWEN=1 extends the transfer by one cycle and delays the assertion of nWE by one cycle.
The Write enable is always deasserted half a cycle before the chip select, at the end of the transfer. nSMBLS has
the same timing as nSMWEN for writes to 8-bit devices that use the byte lane selects instead of the write enables.
The WSTWEN programmed value must be equal to, or less than the WSTWR programmed value otherwise an
invalid access sequence is generated. The access is timed by the WSTWR value and not by the WSTWEN value.
In the External Wait enabled mode, the timing of the transfer (controlled by SMWAIT) is not known. WSTWEN still
delays the assertion of nSMWEN. nSMWEN is delayed more by the external wait signal if it has not been
asserted when SMWAIT is asserted.
You might require the SMADDRVALID signal for synchronous static memory devices when you use it in
asynchronous mode. You can disable it using the AddrValidWriteEn bit in the SMBCRx Register. This bit defaults
to being set(enable). You can then clear it if you do not require it. When you disable it, the signal is driven HIGH
continuously.
Figure 5-8 shows a single external memory write transfer with two write enable delay states, WSTEN=2, and two
wait states, WSTWR=2. A single AHB wait state is inserted.
SMCLK
ADDR
DATA(OUT)
Asynchronous Write
nCS
SMAVD
nWE
A
D(A)
WSTWR=2
WSTWEN=2
Figure 5-8. External Memory Two Write Enable Delay State Write
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-9
SMCLK
ADDR
DATA ( W ) D(A)
nCS
nWE
A
nWAIT
Figure 5-9. Write Timing Diagram (DRnCS = 1, DRnOWE = 0)
SMCLK
ADDR
DATA ( W ) D(A)
nCS
nWE
A
nWAIT
Figure 5-10. Write Timing Diagram (DRnCS = 1, DRnOWE = 1)
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-10
3.5 SYNCHRONOUS WRITE/ SYNCHRONOUS BURST WRITE
Figure 5-11 shows an example synchronous write operation. In this example the signal SMADDRVALID provides
a one-cycle pulse. This behavior is enabled by setting the SyncWriteDev bit in the SMBCRx register. You must
also set the AddrValidWriteEn bit for synchronous write.
The signal PnWE is only active for one cycle. This is active at the start of the transfer unless it is delayed using
the control bits WSTWEN to delay it.
Synchronous burst writes are supported by the SMC. There is no write buffer so you must delay the AHB transfer
to enable the data to be output onto the SMDATA bus. You can control the write in the same way as reads using
the bits AddrValidWriteEn, BurstLenWrite, SyncEnWrite, and BMWrite contained in the Bank Control Register,
SMCRx.
SMCLK
ADDR
DATA(OUT)
Synchronous Write
nCS
nWE
A
D(A)
SMAVD
WSTWR=3
WSTWEN=2
Figure 5-11. Synchronous Two Wait State Write
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-11
3.6 BUS TURNAROUND
You can configure the SMC for each memory bank to use external bus turnaround cycles between read and write
memory accesses. You can program the IDCY field for up to 15 bus turnaround wait states. This avoids bus
contention on the external memory data bus. Bus turnaround cycles are generated between external bus transfers
as follows:
read-to-read, to different memory banks
read-to-write to the same memory banks
read-to-write to different memory banks
Figure 5-12 shows a zero wait asynchronous read followed by two zero wait asynchronous writes with two
turnaround cycles added. The standard minimum of two AHB wait states are added to the read transfer, one is
added to the first write, as for any read-write transfer sequence, and three are added to the second write because
of insertion of the two turnaround cycles that are only generated after the first write transfer has been detected,
and the standard one wait state added when a write transfer is buffered.
Turnaround Cycles
ABC
D(A)
D(B) D(C)
SMCLK
ADDR
nOE
nWE
nCS
DATA(IN)
DATA(OUT)
IDCY=2
Figure 5-12. Read, then two Writes (WSTRD=WSTWR=0), Two Turnaround Cycles (IDCY=2)
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-12
3.6.1 Scenario Examples
ADDR<->CS: 3-cycle, CS<->OE: 4-cycle, CS<->WE: 5-cycle
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-13
3.6.2 SRAM Memory Interface Examples
Figure 5-13. Memory Interface with 8-bit SRAM (2MB)
Figure 5-14. Memory Interface with 16-bit SRAM (4MB)
SRAM/ROM S3C2450
8bit data bus A0 RADDR0
Addr. connection
16bit data bus A0 RADDR0
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-14
4 SPECIAL REGISTERS
4.1 BANK IDLE CYCLE CONTROL REGISTERS 0-5
Register Address R/W Description Reset Value
SMBIDCYR0 0x4F000000 R/W Bank0 idle cycle control register 0xF
SMBIDCYR1 0x4F000020 R/W Bank1 idle cycle control register 0xF
SMBIDCYR2 0x4F000040 R/W Bank2 idle cycle control register 0xF
SMBIDCYR3 0x4F000060 R/W Bank3 idle cycle control register 0xF
SMBIDCYR4 0x4F000080 R/W Bank4 idle cycle control register 0xF
SMBIDCYR5 0x4F0000A0 R/W Bank5 idle cycle control register 0xF
Bit Description Initial State
[31:4] Read undefined. Write as zero. 0x0
IDCY [3:0] Idle or turnaround cycles. Default to 1111 at reset.
This field controls the number of bus turnaround cycles added
between read and write accesses to prevent bus contention on
the external memory data bus.
Turnaround time = IDCY x SMCLK period
0xF
4.2 BANK READ WAIT STATE CONTROL REGISTERS 0-5
Register Address R/W Description Reset Value
SMBWSTRDR0 0x4F000004 R/W Bank0 read wait state control register 0x1F
SMBWSTRDR1 0x4F000024 R/W Bank1 read wait state control register 0x1F
SMBWSTRDR2 0x4F000044 R/W Bank2 read wait state control register 0x1F
SMBWSTRDR3 0x4F000064 R/W Bank3 read wait state control register 0x1F
SMBWSTRDR4 0x4F000084 R/W Bank4 read wait state control register 0x1F
SMBWSTRDR5 0x4F0000A4 R/W Bank5 read wait state control register 0x1F
Bit Description Initial State
[31:5] Read undefined. Write as zero. 0x0
WSTRD [4:0] Read wait state. Defaults to 11111 at reset.
For SRAM and ROM, the wSTRD field controls the number of
wait states for read accesses, and the external wait assertion
timing for reads.
For burst ROM, the WSTRD field controls the number of wait
states for the first read access only.
Wait state time = WSTRD x SMCLK period
0x1F
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-15
4.3 BANK WRITE WAIT STATE CONTROL REGISTERS 0-5
Register Address R/W Description Reset Value
SMBWSTWRR0 0x4F000008 R/W Bank0 write wait state control register 0x1F
SMBWSTWRR1 0x4F000028 R/W Bank1 write wait state control register 0x1F
SMBWSTWRR2 0x4F000048 R/W Bank2 write wait state control register 0x1F
SMBWSTWRR3 0x4F000068 R/W Bank3 write wait state control register 0x1F
SMBWSTWRR4 0x4F000088 R/W Bank4 write wait state control register 0x1F
SMBWSTWRR5 0x4F0000A8 R/W Bank5 write wait state control register 0x1F
Bit Description Initial State
[31:5] Read undefined. Write as zero. 0x0
WSTWR [4:0] Write wait state. Defaults to 11111 at reset.
For SRAM , the WSTWR field controls the number of wait states
for write accesses, and the external wait assertion timing for
writes.
Wait state time = WSTWR x SMCLK period
WSTWR does not apply to read-only devices such as ROM.
0x1F
4.4 BANK OUTPUT ENABLE ASSERTION DELAY CONTROL REGISTERS 0-5
Register Address R/W Description Reset Value
SMBWSTOENR0 0x4F00000C R/W Bank0 output enable assertion delay control register 0x2
SMBWSTOENR1 0x4F00002C R/W Bank1 output enable assertion delay control register 0x2
SMBWSTOENR2 0x4F00004C R/W Bank2 output enable assertion delay control register 0x2
SMBWSTOENR3 0x4F00006C R/W Bank3 output enable assertion delay control register 0x2
SMBWSTOENR4 0x4F00008C R/W Bank4 output enable assertion delay control register 0x2
SMBWSTOENR5 0x4F0000A
C R/W Bank5 output enable assertion delay control register 0x2
Bit Description Initial State
[31:4] Read undefined. Write as zero. 0x0
WSTOEN [3:0] Output enable assertion delay from chip select assertion.
Default to 0x2 at reset 0x2
NOTE: If you would use a muxed OneNAND, the regiseter value of WSTOEN should be larger than 2.
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-16
4.5 BANK WRITE ENABLE ASSERTION DELAY CONTROL REGISTERS 0-5
Register Address R/W Description Reset Value
SMBWSTWENR0 0x4F000010 R/W Bank0 write enable assertion delay control register 0x2
SMBWSTWENR1 0x4F000030 R/W Bank1 write enable assertion delay control register 0x2
SMBWSTWENR2 0x4F000050 R/W Bank2 write enable assertion delay control register 0x2
SMBWSTWENR3 0x4F000070 R/W Bank3 write enable assertion delay control register 0x2
SMBWSTWENR4 0x4F000090 R/W Bank4 write enable assertion delay control register 0x2
SMBWSTWENR5 0x4F0000B
0 R/W Bank5 write enable assertion delay control register 0x2
Bit Description Initial State
[31:4] Read undefined. Write as zero. 0x0
WSTWEN [3:0] Write enable assertion delay from chip select assertion. Default
to 0x2 at reset 0x2
NOTE: SMBWSTRDRx, SMBWSTWRRx, SMBWSTOENRx and SMBWSTWENRx registers are applied when nWAIT signal
is not used(WaitEn bit in SMBCRx is set to ‘0’) . Otherwise, DRnOWE and DRnCS bits in SMBCRx register are
applied when nWAIT signal is used(WaitEn bit in SMBCRx is set to ‘1’).
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-17
4.6 BANK CONTROL REGISTERS 0-5
Register Address R/W Description Reset Value
SMBCR0 0x4F000014 R/W Bank0 control register See note in p5-17
SMBCR1 0x4F000034 R/W Bank1 control register 0x303000
SMBCR2 0x4F000054 R/W Bank2 control register 0x303010
SMBCR3 0x4F000074 R/W Bank3 control register 0x303000
SMBCR4 0x4F000094 R/W Bank4 control register 0x303010
SMBCR5 0x4F0000B4 R/W Bank5 control register 0x303010
Bit Description Initial State
[31:26] Read undefined. Write as zero. 0x0
DELAYnCS [25:22] Controls the delay between ADDR signal and nCS signal. The
field is valid only when DRnCS bit is 1. 0x0
[21] not available(should be high) 0x1
AddrValid
WriteEn
[20] Controls the behavior of the signal RSMAVD during write
operations:
0 = Signal always HIGH
1 = Signal active for asynchronous and synchronous write
accesses (default).
0x1
BurstLenWrite
[19:18] Burst transfer length. Sets the number of sequential transfers
that the burst device supports for a write:
00 = 4-transfer burst (default)
01 = Reserved
10 = Reserved
11 = Reserved
0x0
SyncWriteDev [17] 0 = Asynchronous device (default).
1 = Synchronous device.
0x0
BMWrite
[16] Burst mode write:
0 = Nonburst writes to memory devices (default at reset)
1 = Burst mode writes to memory devices.
0x0
DRnOWE [15]
0 = No delay (default)
1 = Get the delay between nCS signal and nOE/nWE signal.
nOE: The number of cycle is defined by SMBWSTOENRx
which must be larger than 1.
nWE: The number of cycle is defined by SMBWSTWENRx
which must be larger than 1.
This bit is applied only when nWAIT signal is used.
0x0
Reserved [14] Reserved 0x0
Reserved [13] not available(should be high) 0x1
AddrValid
ReadEn
[12] Controls the behavior of the signal RSMAVD during read
operations:
0 = Signal always HIGH.
1 = Signal active for asynchronous and synchronous read
accesses (default).
0x1
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-18
Bit Description Initial State
BurstLen
Read
[11:10] Burst transfer length. Sets the number of sequential transfers
that the burst device supports for a read:
00 = 4-transfer burst. 01 = 8-transfer burst.
10 = 16-transfer burst. 11 = Reserved
0x0
SyncReadDev
[9] Synchronous access capable device connected. Access the
device using synchronous accesses for reads:
0 = Asynchronous device (default).
1 = Synchronous device.
0x0
BMRead
[8] Burst mode read and asynchronous page mode:
0 = Nonburst reads from memory devices (default at reset).
1 = Burst mode reads from memory devices.
0x0
DRnCS [7]
0 = No delay (defualt)
1 = Get the delay between ADDR signal and nCS signal.
The number of cycle is defined by DELAYnCS field of
SMBCRx.
This bit is applied only when nWAIT signal is used.
0x0
SMBLSPOL
[6] Polarity of signal nBE:
0 = Signal is active LOW (default).
1 = Signal is active HIGH.
0x0
MW
[5:4] Memory width:
00 = 8-bit. 01 = 16-bit.
10 = Reserved. 11 = Reserved.
Defaults to different values at reset for each bank.
For SMBCR0, reset value is set according to OM. (See table
1-4)
See note in p5-
17
Reserved [3]
Reserved 0x0
WaitEn
[2] External memory controller wait signal enable:
0 = The SMC is not controlled by the external wait signal
(default at reset).
1 = The SMC looks for the external wait input signal, nWAIT.
0x0
WaitPol
[1] Polarity of the external wait input for activation:
0 = The nWAIT signal is active LOW (default at reset).
1 = The nWAIT signal is active HIGH.
0x0
RBLE
[0] Read byte lane enable:
0 = nBE[1:0] all deasserted HIGH during system reads from
external memory. This is for 8-bit devices where the byte lane
enable is connected to the write enable pin so you must
deassert it during a read (default at reset). The nBE signals
act as write enables in this configuration.
1 = nBE[1:0] all asserted LOW during system reads from
external memory. This is for 16 or 32-bit devices where you
use the separate write enable signal, and you must hold the
byte lane selects asserted during a read. The nBE signal acts
as the write enable in this configuration.
0x0
NOTE: Initial value of SMBCR0 is 0x303010 or 0x303000 according to OM value(See table 1-4), because the memory width,
MW, of the booting memory is determined by OM.
S3C2450X RISC MICROPROCESSOR STATIC MEMORY CONTROLLER
5-19
4.7 BANK ONENAND TYPE SELECTION REGISTER
Register Address R/W Description Reset Value
SMBONETYPER 0x4F000100 R/W SMC Bank OneNAND type selection
register 0x0
Bit Description Initial State
[31:6] Read undefined. 0x0
BANK5TYPE [5] 0 = DEMUXED OneNAND
1 = MUXED OneNAND
0x0
BANK4TYPE [4] 0 = DEMUXED OneNAND
1 = MUXED OneNAND
0x0
BANK3TYPE [3] 0 = DEMUXED OneNAND
1 = MUXED OneNAND
0x0
BANK2TYPE [2] 0 = DEMUXED OneNAND
1 = MUXED OneNAND
0x0
BANK1TYPE [1] 0 = DEMUXED OneNAND
1 = MUXED OneNAND
0x0
[0] Reserved 0x0
NOTE: Type of bank0 OneNAND is determined by OM[4:2] signals (See table 1-4).
4.8 SMC STATUS REGISTER
Register Address R/W Description Reset Value
SMCSR 0x4F000200 R SMC status register 0x0
Bit Description Initial State
[31:1] Read undefined. 0x0
WaitStatus [0] External wait status, read:
0 = nWAIT deasserted.
1 = nWAIT asserted.
After an externally waited transfer that was terminated early,
this bit value can detect when
nWAIT is deasserted. At all other times, this bit reads zero.
0x0
STATIC MEMORY CONTROLLER S3C2450X RISC MICROPROCESSOR
5-20
4.9 SMC CONTROL REGISTER
Register Address R/W Description Reset Value
SMCCR 0x4F000204 R/W SMC control register 0x3
Bit Description Initial State
[31:2] Read undefined. Write as zero. 0x0
MemClkRatio [1] Defines the ratio of SMCLK to HCLK:
0 = SMCLK = HCLK.
1 = SMCLK = HCLK/2.
0x1
SMClockEn [0] SMCLK enable:
0 = Clock only active during memory accesses.
1 = Clock always running.
Clock stopping saves power by stopping SMCLK when it is
not required. If clock stopping is enabled before the memory
access, the SMC stops SMCLK on the following conditions:
• asynchronous read access to asynchronous memory
• asynchronous write access to asynchronous memory
• asynchronous read access to synchronous memory
• asynchronous write access to synchronous memory.
0x1
S3C2450X RISC MICROPROCESSOR MOBILE DRAM CONTROLLER
6-1
6 MOBILE DRAM CONTROLLER
1 OVERVIEW
The S3C2450 Mobile DRAM Controller supports three kinds of memory interface - (Mobile) SDRAM and mobile
DDR and DDR2. Mobile DRAM controller provides 2 chip select signals (2 memory banks), these are used for up
to 2 (mobile) SDRAM banks or 2 mobile DDR banks or 2 DDR2 banks. Mobile DRAM controller can’t support 3
kinds of memory interface simultaneous, for example one bank for (mobile) SDRAM and one bank for mobile
DDR.
Mobile DRAM controller has the following features:
• Support little endian
• Mobile DDR SDRAM and (Mobile) SDRAM
− Supports 32-bit for SDRAM and 16-bit data bus interface for mDDR and DDR2.
− Address space: up to 128Mbyte
− Supports 2 banks: 2-nCS (chip selection)
− 16-bit Refresh Timer
− Self Refresh Mode support (controlled by power management)
− Programmable CAS Latency
− Provide Write buffer: 8-word size
− Provide pre-charge and active power down mode
− Provide power save mode
− Support extended MRS for mobile DRAM)
♦ DS, TSCR, PASR
• DDR2 Features
− Support DDR2 having 4-bank architecture, don’t support 8-bank architecture.
− Support 16-bit external data bus interface
− Support AL(Additive Latency) 0, don’t support posted CAS, it needs EMRS setting.
− Don’t support ODT and nDQS function, it needs EMRS setting.
− All other features are same to the features of SDR/mDDR
MOBILE DRAM CONTROLLER S3C2450X RISC MICROPROCESSOR
6-2
2 BLOCK DIAGRAM
Follow Figure 6-1 shows the block diagram of Mobile DRAM Controller
Figure 6-1. Mobile DRAM Controller Block Diagram
S3C2450X RISC MICROPROCESSOR MOBILE DRAM CONTROLLER
6-3
3 MOBILE DRAM INITIALIZATION SEQUENCE
On power-on reset, software must initialize the memory controller and the mobile DRAM connected to the
controller. Refer to the mobile DRAM(SDRAM or mDDR or DDR2) data sheet for the start up procedure, and
example sequences are given below:
3.1 MOBILE DRAM(SDRAM OR MOBILE DDR) INITIALIZATION SEQUENCE
1. Wait 200us to allow DRAM power and clock stabilize.
2. Setting the Configuration Register0. This is for MRS and EMRS command to DRAM.
3. Program the configuration register1, and 3 to their normal operation values
4. Program the INIT[1:0] to ‘01b’. This automatically issues a PALL(pre-charge all) cammand to the DRAM.
5. Write ‘0xff’ into the refresh timer register. This provides a refresh cycle every 255-clock cycles.
6. Wait minimum 2 auto-refresh cycle; DRAM requires minimun 2 auto-refresh cycle.
7. Program the INIT[1:0] of Control Register1 to ‘10b’. This automatically issues a MRS command to the DRAM
8. Program the normal operational value(auto-refresh ducy cycle) into the refresh timer.
9. Program the INIT[1:0] of Control Register1 to ‘11b’. This automatically issues a EMRS command to the Mobile
DRAM, It’s only needed for Mobile DRAM.
10. Program the INIT[1:0] to ‘00b’. The controller enters the normal mode.
11. The external DRAM is now ready for normal operation.
3.2 DDR2 INITIALIZATION SEQUENCE
1. Setting the BANKCFG & BANKCON1, 2, 3
2. Wait 200us to allow DRAM power and clock stabilize.
3. Wait minimum of 400 ns then issue a PALL(pre-charge all) command.
Program the INIT[1:0] to ‘01b’. This automatically issues a PALL(pre-charge all) cammand to the DRAM.
4. Issue an EMRS command to EMR(2), provide LOW to BA0, High to BA1.
Program the INIT[1:0] of Control Register1 to ‘11b’ & BANKCON3[31]=’1b’
5. Issue an EMRS command to EMR(3), provide High to BA0 and BA1.
Program the INIT[1:0] of Control Register1 to ‘11b’ & BANKCON3[31:30]=’11b’
6. Issue an EMRS to enable DLL and RDQS, nDQS, ODT disable.
7. Issue a Mode Register Set command for DLL reset.(To issue DLL Reset command, provide HIGH to A8 and
LOW to BA0-BA1, and A13-A15.) Program the INIT[1:0] to ‘10b’. & BANKCON3[8]=’1b’
8. Issue a PALL(pre-charge all) command.
Program the INIT[1:0] to ‘01b’. This automatically issues a PALL(pre-charge all) cammand to the DRAM.
9. Issue 2 or more auto-refresh commands.
10. Issue a MRS command with LOW to A8 to initialize device operation.
Program the INIT[1:0] to ‘10b’. & BANKCON3[8]=’0b’
11. Wait 200 clock after step 7, execute OCD Calibration.
12. The external DRAM is now ready for normal operation
MOBILE DRAM CONTROLLER S3C2450X RISC MICROPROCESSOR
6-4
3.2.1 (Mobile) SDRAM Memory Interface Examples
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
BA0
BA1
LDQM
UDQM
A14
A15
DQM0
DQM1
SCKE
SCLK SCKE
SCLK
nSCS0
nSRASn
SCASn
WE
nSCS
nSRAS
nSCAS
nWE
Figure 6-2. Memory Interface with 16-bit SDRAM (4Mx16, 4banks)
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
BA0
BA1
LDQM
UDQM
A14
A15
DQM0
DQM1
SCKE
SCLK SCKE
SCLK
nSCS0
nSRASn
SCASn
WE
nSCS
nSRAS
nSCAS
nWE
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
BA0
BA1
LDQM
UDQM
A14
A15
DQM2
DQM3
SCKE
SCLK SCKE
SCLK
nSCS0
nSRASn
SCASn
WE
nSCS
nSRAS
nSCAS
nWE
Figure 6-3. Memory Interface with 32-bit SDRAM (4Mx16 * 2ea, 4banks)
S3C2450X RISC MICROPROCESSOR MOBILE DRAM CONTROLLER
6-5
3.2.2 Mobile DDR (and DDR2) Memory Interface Examples
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A14
A15
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
BA0
BA1
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
LDQM
UDQM
DQS0
DQS1
DQM0
DQM1
DQS0
DQS1
SCKE
SCLK
SCLKn
CKE
CK
nCK
nSCS0
nSRASn
SCASn
WE
nSCS
nSRAS
nSCAS
nWE
Figure 6-4. Memory Interface with 16-bit Mobile DDR and DDR2
MOBILE DRAM CONTROLLER S3C2450X RISC MICROPROCESSOR
6-6
3.2.3 Supported Programmable Timing Parameters
Figure 6-5. DRAM Timing Diagram
Figure 6-5 shows a timing diagram of DRAM. There are many timing parameters provided by DRAM. And
DRAMC only provides some timing parameters to support various DRAM memories, like SDR, mobile DDR and
DDR2.
tARFC and tRP are programmable, so you can also control the tRAS period by using these parameters. And the
delay from RAS to CAS is determined by tRCD. And CL(CAS Latency) is also programmable. The timing diagram
of CL (CAS Latency) is like Figure 6-6.
Figure 6-6. CL (CAS Latency) Timing Diagram
S3C2450X RISC MICROPROCESSOR MOBILE DRAM CONTROLLER
6-7
DRAMC also needs tARFC timing parameter to control of the timing for auto-refresh to CMD and self-refresh to
CMD period. The Figure 6-7 shows the tARFC timing diagram.
Figure 6-7. tARFC Timing Diagram
MOBILE DRAM CONTROLLER S3C2450X RISC MICROPROCESSOR
6-8
3.3 MOBILE DRAM CONFIGURATION REGISTER
Register Address R/W Description Reset Value
BANKCFG 0x48000000 R/W Mobile DRAM configuration register 0x0000_000C
BANKCFG Bit Description Initial State
Reserved [31:19] Reserved 0x0000
RASBW0 [18:17]
The bit width of RAS (row) address of bank 0
00 = 11-bit 01 = 12-bit
10 = 13-bit 11 = 14-bit
00b
Reserved [16] Reserved 0b
RASBW1 [15:14]
The bit width of RAS (row) address of bank 1
00 = 11-bit 01 = 12-bit
10 = 13-bit 11 = 14-bit
00b
Reserved [13] Reserved 0b
CASBW0 [12:11]
The bit width of CAS (column) address of bank 0
00 = 8-bit 01 = 9-bit
10 = 10-bit 11 = 11-bit
00b
Reserved [10] Reserved 0b
CASBW1 [9:8]
The bit width of CAS (column) address of bank 1
00 = 8-bit 01 = 9-bit
10 = 10-bit 11 = 11-bit
00b
ADDRCFG0 [7:6]
Memory address configuration of
00 = {BA, RAS, CAS}
01 = {RAS, BA, CAS}
0b
ADDRCFG1 [5:4]
Memory address configuration
00 = {BA, RAS, CAS}
01 = {RAS, BA, CAS}
0b
MEMCFG [3:1]
000 = SDR
001 = DDR2
010 = mSDR
110 = mDDR
011 = 100 = 101 = 111 = Reserved
110b
BW [0]
Determine external memory data bus width
0 = 32-bit
1 = 16-bit
0b
S3C2450X RISC MICROPROCESSOR MOBILE DRAM CONTROLLER
6-9
3.4 MOBILE DRAM CONTROL REGISTER
Register Address R/W Description Reset Value
BANKCON1 0x48000004 R/W Mobile DRAM control register 0x4400_0040
BANKCON Bit Description Initial State
BUSY [31]
DRAM controller status bit (read only)
0 = IDLE
1 = BUSY
0b
DQSInDLL* [30:28]
DQSIn Delay selection
Should be set ‘3’ 100b
Reserved [27:26] Should be ‘1’ 01b
Reserved [25:8] Should be ‘1’ 0
BStop [7]
Read Burst stop control
0 = Not support Read Burst Stop
1 = Support Read Burst Stop
Note: This function is only valid in mDDR interface.
0b
WBUF [6]
Write buffer control
0 = Disable
1 = Enable
Note: Disabling the write buffer will flush any stored values to the
external DRAM memory.
1b
AP [5]
Auto pre-charge control
0 = Enable auto pre-charge
1 = Disable auto pre-charge
Note: If PWRDN is enabled, then AP=0 provides pre-charge power
down and AP=1 provides active power down.
0b
PWRDN [4]
0 = Not support DRAM power down control
1 = Support DRAM power down control 0b
Reserved [3:2] Reserved 00b
INIT [1:0]
DRAM initialization control
00 = Normal operation
01 = Issue PALL command
10 = Issue MRS command
11 = Issue EMRS command
00b
MOBILE DRAM CONTROLLER S3C2450X RISC MICROPROCESSOR
6-10
3.5 MOBILE DRAM TIMMING CONTROL REGISTER
Register Address R/W Description Reset Value
BANKCON2 0x48000008 R/W Mobile DRAM timing control register 0x0099_003F
TIMECON Bit Description Initial State
Reserved [31:24] Reserved 0x00
tRAS [23:20]
Row active time
0000 = 1-clock 0001 = 2-clock 0010 = 3-clock 0011 = 4-clock
0100 = 5-clock 0101 = 6-clock 0110 = 7-clock 0111 = 8-clock
1000 = 9-clock 1001 = 10-clock 1010 = 11-clock 1011 = 12-clock
1100 = 13-clock 1101 = 14-clock 1110 = 15-clock 1111 = 16-clock
1001b
tARFC [19:16]
Self-refresh or Auto-refresh to next command cycle time
0000 = 1-clock 0001 = 2-clock 0010 = 3-clock 0011 = 4-clock
0100 = 5-clock 0101 = 6-clock 0110 = 7-clock 0111 = 8-clock
1000 = 9-clock 1001 = 10-clock 1010 = 11-clock 1011 = 12-clock
1100 = 13-clock 1101 = 14-clock 1110 = 15-clock 1111 = 16-clock
1001b
Reserved [15:6] Reserved 0x000
CAS Latency
[5:4] CAS Latency Control
00 = Reserved
01 = 1-clock
10 = 2-clock
11 = 3-clock
011b
tRCD [3:2]
RAS to CAS delay
00 = 1-clock
01 = 2-clock
10 = 3-clock
11 = 4-clock
11b
tRP [1:0]
Row pre-charge time
00 = 1-clock
01 = 2-clock
10 = 3-clock
11 = 4-clock
11b
S3C2450X RISC MICROPROCESSOR MOBILE DRAM CONTROLLER
6-11
3.6 MOBILE DRAM (EXTENDED ) MODE REGISTER SET REGISTER
Register Address R/W Description Reset Value
BANKCON3 0x4800000C R/W Mobile DRAM (E)MRS Register 0x8000_0003
3.6.1 mSDRAM / mDDR
PnBANKCON Bit Description Initial State
BA [31:30] Bank address for EMRS 10b
Reserved [29:23] Should be ‘0’ 0000000b
DS [22:21] DS(Driver Strength) for EMRS 00b
Reserved [20:19] Should be ‘0’ 00b
PASR [18:16] PASR(Partial Array Self Refresh) for EMRS 000b
BA [15:14] Bank address for MRS 0b
Reserved [15:7] Should be ‘0’ 000000000b
CAS Latency [6:4]
CAS Latency for MRS
00 = Reserved
01 = 1-clock
10 = 2-clock
11 = 3-clock
000b
Burst Type [3] DRAM Burst Type (Read Only)
Only support sequential burst type. 0b
Burst Length [2:0] DRAM Burst Length (Read Only)
This value is determined internally. 011b
NOTE: Bit[15:0] is used for MRS command cycle, and Bit[31:16] is for EMRS command cycle. You can program this register
as memory type you are using. Each 16-bit exactly map the (E)MRS register bit location. Refer to memory data sheet.
MOBILE DRAM CONTROLLER S3C2450X RISC MICROPROCESSOR
6-12
3.6.2 DDR2 Memory MRS[15:0] and EMRS(1)[31:16]
PnBANKCON Bit Description Initial State
BA [31:30] Bank address for EMRS 10b
Reserved [29] Should be ‘0’ 0b
Qoff [28]
0 = Output buffer enable
1 = Output buffer disable 0b
RDQS [27]
0 = Disable
1 = Enable 0b
nDQS [26]
0 = Enable
1 = Disable 0b
OCD program [25:23] Refer to DDR2 spec. 000b
Additive latency [21:19] Refer to DDR2 spec. 000b
Rtt [22] [18]
00 = ODT disable
01 = 75Ω
10 = 150Ω
11 = 50Ω
00b
D.I.C [17]
0 = Full strength
1 = Reduced strength 0b
DLL enable [16] 0 = Enable
1 = Disable 0b
Reserved [15:13] Should be ‘0’ 000b
Active Power
down exit time [12] 0 = Fast exit
1 = Slow exit 0b
WR [11:9] Write recovery for auto pre-charge 000b
DLL Reset [8] 0 = No
1 = Yes 0b
TM [7]
0 = Normal
1 = Test 0b
CAS Latency [6:4]
CAS Latency for MRS
00 = Reserved
01 = 1-clock
10 = 2-clock
11 = 3-clock
000b
Burst Type [3] DRAM Burst Type (Read Only)
Only support sequential burst type. 0b
Burst Length [2:0] DRAM Burst Length (Read Only)
This value is determined internally. 011b
S3C2450X RISC MICROPROCESSOR MOBILE DRAM CONTROLLER
6-13
3.6.3 DDR2 Memory EMRS(2)[31:16]
PnBANKCON Bit Description Initial State
BA [31:30] Bank address for EMRS 10b
Reserved [29:24] Should be ‘0’ 000000b
SRF [23]
High Temperature Self-Refresh Rate Enable
0 = Disable
1 = Enable
0b
Reserved [22:20] Should be ‘0’ 000b
DCC [19]
0 = Disable
1 = Enable 0b
PASR [18:16] PASR(Partial Array Self Refresh) for EMRS(2) 000b
3.6.4 DDR2 Memory EMRS(3)[31:16]
PnBANKCON Bit Description Initial State
BA [31:30] Bank address for EMRS 10b
Reserved [29:16] Should be ‘0’ 0x0
MOBILE DRAM CONTROLLER S3C2450X RISC MICROPROCESSOR
6-14
3.7 MOBILE DRAM REFRESH CONTROL REGISTER
Register Address R/W Description Reset Value
REFRESH 0x48000010 R/W Mobile DRAM refresh control register 0x0000_0020
REFRESH Bit Description Initial State
Reserved [31:16] Reserved 0x0000
REFCYC [15:0]
DRAM refresh cycle.
Example: Refresh period is 15.6us, and HCLK is 66MHz. The
value of REFCYC is as follows:
REFCYC = 15.6 x 10-6 x 66 x 106 = 1029
0x0020
3.8 MOBILE DRAM WRITE BUFFER TIME OUT REGISTER
A write to a enabling write buffer loads the value in the timeout register into timeout down counter of the buffer.
When the timeout counter reached 0 the contents of write buffer is flushed to the external DRAM. The down
counter is clocked HCLK. Writing a value of 0 in the TIMEOUT register disables the write buffer timeout function.
Register Address R/W Description Reset Value
TIMEOUT 0x48000014 R/W Write Buffer Time out control register 0x0000_0000
TIMEOUT Bit Description Initial State
Reserved [31:16] Reserved 0x0000
TIMEOUT [15:0] Write buffer time-out delay time 0x0000
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-1
7 NAND FLASH CONTROLLER
1 OVERVIEW
S3C2450 boot code can be executed on an external NAND flash memory. The S3C2450 is equipped with an
internal SRAM buffer called ‘Steppingstone’. This supports NAND flash boot loader. When you use IROM boot
and select nand flash as boot device, first 8 KB of the NAND flash memory will be loaded in the Steppingstone by
IROM and the boot code will be executed in the steppingstone.
Generally, In IROM boot, the boot code will copy NAND flash content to SDRAM. At that time IROM uses 8Bit
ECC and the NAND flash data will be checked valid or not. After the NAND flash content is copied to SDRAM,
main program will be executed on SDRAM.
To use NAND Flash Device, The OM and the GPC5/6/7 configuration should be set to use IROM boot and select
proper nand device type. Nand Boot written below is boot device in IROM boot. Refer to IROM application Note
for more information. S3C2450 supports nand boot by using IROM boot mode.
2 FEATURES
NAND flash controller features include:
1. Auto boot by: The boot code is transferred into 8-KB Steppingstone after reset. After the boot code is
transfered, boot code will be executed on the Steppingstone.
Note: IROM boot support 8Bit ECC correction on Nand device booting
2. NAND Flash memory I/F: Support 512Bytes, 2KB and 4KB Page.
3. Software mode: User can directly access NAND flash memory. for example this feature can be used in
read/erase/program NAND flash memory.
4. Interface: 8-bit NAND flash memory interface bus.
5. Hardware ECC generation, detection and indication (Software correction).
6. Support both SLC and MLC NAND flash memory: 1-bit ECC, 4-bit and 8-bit ECC for NAND flash.
7. SFR I/F: Support Byte/half word/word access to Data and ECC Data register, and Word access to other
registers
8. SteppingStone I/F: Support Byte/half word/word access.
9. The Steppingstone 64-KB internal SRAM buffer can be used for another purpose after NAND flash booting.
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-2
3 BLOCK DIAGRAM
SFR
ECC Gen.
Stepping Stone
(64KB SRAM)
Stepping Stone
Controller
SYSTEM BUS
NAND FLASH
Interface
CLE
ALE
nFCE
nRE
nWE
RnB
I/O0 - I/O7
AHB
Slave I/F
Control &
State Machine
Figure 7-1. NAND Flash Controller Block Diagram
4 BOOT LOADER FUNCTION
Stepping Stone
(64KB Buffer)
NAND FLASH
Controller NAND FLASH
Memory
Special Function
Registers
REGISTERS AUTO BOOT
CORE ACCESS
(Boot Code)
USER ACCESS
Figure 7-2. NAND Flash Controller Boot Loader Block Diagram
During reset, the IROM gets the information about the adopted NAND flash memory by using the pin status of
GPC5/6/7 (refer to Pin Configuration). In case of POR(Power-On-Reset) or system reset, the IROM
automatically loads the 8-KB boot-loader codes into the steppingstone(0x40000000). After finishing the migration
of the boot-loader codes, the codes in steppingstone will be executed.
NOTE
In case of IROM boot mode, the ECC-checking for boot-loader code will be done. Therefore, 0 block of
NAND flash should be valid block by 8Bit ECC.
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-3
5 GPC5/6/7 PIN CONFIGURATION TABLE IN IROM BOOT MODE
Page Address Cycle GPC7 [2] GPC6 [1] GPC5 [0]
MMC(MoviNAND/iNand) - - 0 0 0
Reserved - - 0 0 1
3 0 1 0
512 4 0 1 1
4 1 0 0
2048 5 1 0 1
Nand
4096 5 1 1 0
Above configuration is applicable when NAND Flash is used as booting memory in IROM boot mode. If NAND
Flash is not used as boot memory, the configuration can be changed by setting NFCON SFR ’NFCONF’
(0x4E000000). PageSize, PageSize_Ext and AddrCycle are fields in NFCONF(0x4E000000).
6 NAND FLASH MEMORY TIMING
HCLK
CLE / ALE
nWE
TACLS TWRPH0 TWRPH1
DATA COMMAND / ADDRESS
Figure 7-3. CLE & ALE Timing (TACLS=1, TWRPH0=0, TWRPH1=0) Block Diagram
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-4
HCLK
nWE / nRE
DATA DATA
TWRPH0 TWRPH1
Figure 7-4. nWE & nRE Timing (TWRPH0=0, TWRPH1=0) Block Diagram
7 NAND FLASH ACCESS
S3C2450 does not support NAND flash access mechanism directly. It only supports signal control mechanism for
NAND flash access. Therefore software is responsible for accessing NAND flash memory correctly.
1. Writing to the command register (NFCMMD) = the NAND Flash Memory command cycle
2. Writing to the address register (NFADDR) = the NAND Flash Memory address cycle
3. Writing to the data register (NFDATA) = write data to the NAND Flash Memory (write cycle)
4. Reading from the data register (NFDATA) = read data from the NAND Flash Memory (read cycle)
5. Reading main ECC registers and Spare ECC registers (NFMECCD0/1, NFSECCD) = read data from the
NAND Flash Memory
NOTE
In NAND flash access, you must check the RnB status input pin by polling the signal or using interrupt.
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-5
8 DATA REGISTER CONFIGURATION
8.1.1 8-bit NAND Flash Memory Interface
A. Word Access
Register Bit [31:24] Bit [23:16] Bit [15:8] Bit [7:0]
NFDATA 4th I/O[ 7:0] 3rd I/O[ 7:0] 2nd I/O[ 7:0] 1st I/O[ 7:0]
B. Half-word Access
Register Bit [31:24] Bit [23:16] Bit [15:8] Bit [7:0]
NFDATA Invalid value Invalid value 2nd I/O[ 7:0] 1st I/O[ 7:0]
C. Byte Access
Register Bit [31:24] Bit [23:16] Bit [15:8] Bit [7:0]
NFDATA Invalid value Invalid value Invalid value 1st I/O[ 7:0]
9 STEPPINGSTONE (8KB IN 64KB SRAM)
The NAND Flash controller uses Steppingstone as the buffer on booting and also you can use this area for
various other purpose.
10 1BIT / 4BIT / 8BIT ECC (ERROR CORRECTION CODE)
NAND flash controller has four ECC (Error Correction Code) modules for 1 bit ECC, one for 4bit ECC and one for
8bit ECC.
The 1bit ECC modules for main data area can be used for (up to) 2048 bytes ECC parity code generation, and 1
bit ECC module for spare area can be used for (up to) 4 bytes ECC Parity code generation.
Both 4bit and 8bit ECC modules can be used for only 512 bytes ECC parity code generation.
4 bit and 8bit ECC modules generate the parity codes for each 512 byte. However, 1 bit ECC modules generate
parity code per byte lane separately.
10.1 ECC MODULE FEATURES
ECC generation is controlled by the ECC Lock (MainECCLock, SpareECCLock) bit of the Control register. When
ECCLock is Low, ECC codes are generated by the H/W ECC modules.
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-6
10.1.1 1-BIT ECC Register Configuration
Following tables shows the configuration of 1-bit ECC value read from spare area of external NAND flash
memory. For comparing to ECC parity code generated by the H/W modules, each ECC data read from memory
must be written to NFMECCDn for main area and NFSECCD for spare area.
NOTE
4-bit ECC decoding scheme is different to 1-bit ECC.
1. NAND Flash Memory Interface
Register Bit [31:24] Bit [23:16] Bit [15:8] Bit [7:0]
NFMECCD0 Not used 2nd ECC for I/O[7:0] Not used 1st ECC for I/O[7:0]
NFMECCD1 Not used 4th ECC for I/O[7:0] Not used 3rd ECC for I/O[7:0]
Register Bit [31:24] Bit [23:16] Bit [15:8] Bit [7:0]
NFSECCD Not used 2nd ECC for I/O[7:0] Not used 1st ECC for I/O[7:0]
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-7
10.2 1-BIT ECC PROGRAMMING ENCODING AND DECODING
1. To use 1-bit ECC in software mode, reset the ECCType to ‘0’ (enable 1-bit ECC)‘. ECC module generates
ECC parity code for all read / write data when MainECCLock (NFCONT[7]) and SpareECCLock (NFCONT[6])
are unlocked(‘0’). You must reset ECC value by writing the InitMECC (NFCONT[5]) and InitSECC
(NFCONT[4]) bit as ‘1’ and have to clear the MainECCLock (NFCONT[7]) bit to ‘0’(Unlock) before read or
write data.
MainECCLock (NFCONT[7]) and SpareECCLock(NFCONT[6]) bit controls whether ECC Parity code is
generated or not.
2. Whenever data is read or written, the ECC module generates ECC parity code on register NFMECC0/1.
3. After you complete read or write one page (does not include spare area data), Set the MainECCLock bit to ‘1’
(Lock). ECC Parity code is locked and the value of the ECC status register will not be changed.
4. To generate spare area ECC parity code, Clear SpareECCLock (NFCONT[6]) bit to ‘0’ (unlock).
5. Whenever data is read or written, the spare area ECC module generates ECC parity code on register
NFSECC.
6. After you complete read or write spare area, set the SpareECCLock bit to '1' (Lock). ECC Parity code is
locked and the value of the ECC status register will not be changed.
7. From now on, you can use these values to record to the spare area or check the bit error.
8. For example, to check the bit error of main data area on page read operation, after generating of ECC codes
for main data area, you have to move the ECC parity codes (is stored to spare area) to NFMECCD0 and
NFMECCD1. From this time, the NFECCERR0 have the valid error status values.
NOTE
NFSECCD is for the ECC value in spare area. Usually, the user will write the ECC value generated from
main data area to Spare area, which value will be the same as NFMECC0/1.
10.3 4-BIT ECC PROGRAMMING GUIDE (ENCODING)
1. To use 4-bit ECC in software mode, set the MsgLength to 0(512-byte message length) and set the ECCType
to ‘1’(enable 4-bit ECC). ECC module generates ECC parity code for 512-byte write data. So, you have to
reset ECC value by writing the InitMECC (NFCONT[5]) bit as ‘1’ and have to clear the MainECCLock
(NFCONT[7]) bit to ‘0’(Unlock) before write data.
MainECCLock (NFCONT[7]) bit controls whether ECC Parity code is generated or not.
2. Whenever data is written, the 4-bit ECC module generates ECC parity code internally.
3. After you finish writing 512-byte data (not include spare area data), the parity codes are automatically updated
to NFMECC0, NFMECC1 register. If you use 512-byte NAND flash memory, you can program these values to
spare area. However, if you use NAND flash memory more than 512-byte page, you can’t program
immediately. In this case, you have to copy these parity codes to other memory like DRAM. After writing all
main data, you can write the copied ECC values to spare area.
The parity codes have self-correctable information include parity code itself.
4. To generate spare area ECC parity code, set the MsgLength to 1(24-byte message length), and set the
ECCType to '1'(enable 4-bit ECC). ECC module generates ECC parity code for 24-byte write data. So you
have to reset ECC value by writing the InitMECC (NFCONT[5]) bit as '1' and have to clear the MainECCLock
(NFCONT[7]) bit to ‘0’(Unlock) before write data.
MainECCLock (NFCONT[7]) bit controls whether ECC Parity code is generated or not.
5. Whenever data is written, the 4-bit ECC module generates ECC parity code internally.
6. When you finish writing 24-byte meta or extra data, the parity codes are automatically updated to NFMECC0,
NFMECC1 register. You can program these parity codes to spare area.
The parity codes have self-correctable information include parity code itself.
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-8
10.4 4-BIT ECC PROGRAMMING GUIDE (DECODING)
1. To use 4-bit ECC, set the MsgLength to 0(512-byte message length) and set the ECCType to ‘1’(enable 4-bit
ECC). ECC module generates ECC parity code for 512-byte read data. So, you have to reset ECC value by
writing the InitMECC (NFCONT[5]) bit as ‘1’ and have to clear the MainECCLock (NFCONT[7]) bit to
‘0’(Unlock) before read data.
MainECCLock (NFCONT[7]) bit controls whether ECC Parity code is generated or not.
2. Whenever data is read, the 4-bit ECC module generates ECC parity code internally.
3. After you complete read 512-byte (does not include spare area data), you have to read parity codes. 4-bit
ECC module needs parity codes to detect whether error bits are or not. So you have to read ECC parity code
right after read 512-byte. Once ECC parity code is read, 4-bit ECC engine start to search any error internally.
4-bit ECC error searching engine need minimum 155 cycles to find any error. During this time, you can
continue read main data from external NAND flash memory. ECCDecDone(NFSTAT[6]) can be used to check
whether ECC decoding is completed or not.
4. When ECCDecDone (NFSTAT[6]) is set (‘1’), NFECCERR0 indicates whether error bit exist or not. If any
error exists, you can fix it by referencing NFECCERR0/1 and NFMLCBITPT register.
5. If you have more main data to read, continue to step 2.
6. For meta data error check, set the MsgLength to 1(24-byte message length) and set the ECCType to
‘1’(enable 4-bit ECC). ECC module generates ECC parity code for 24-byte read data. So you have to reset
ECC value by writing the InitMECC (NFCONT[5]) bit as ‘1’ and have to clear the MainECCLock (NFCONT[7])
bit to ‘0’(Unlock) before read data.
MainECCLock (NFCONT[7]) bit controls whether ECC Parity code is generated or not.
7. Whenever data is read, the 4-bit ECC module generates ECC parity code internally.
8. After you complete read 24-byte, you have to read parity codes. 4-bit ECC module needs parity codes to
detect whether error bits are or not. So you have to read ECC parity codes right after read 24-byte. Once ECC
parity code is read, 4-bit ECC engine start to search any error internally. 4-bit ECC error searching engine
need minimum 155 cycles to find any error. During this time, you can continue read main data from external
NAND flash memory. ECCDecDone(NFSTAT[6]) can be used to check whether ECC decoding is completed
or not.
9. When ECCDecDone (NFSTAT[6]) is set (‘1’), NFECCERR0 indicates whether error bit exist or not. If any
error exists, you can fix it by referencing NFECCERR0/1 and NFMLCBITPT register.
10.5 8-BIT ECC PROGRAMMING GUIDE (ENCODING)
1. To use 8-bit ECC in software mode, set the MsgLength to 0(512-byte message length) and set the ECCType
to “01”(enable 8-bit ECC). ECC module generates ECC parity code for 512-byte write data. In order to start
the ECC module, you have to write ‘1’ on the InitMECC (NFCONT[5]) bit after cleaning the MainECCLock
(NFCONT[7]) bit to ‘0’ (Unlock).
MainECCLock (NFCONT[7]) bit controls whether ECC Parity code is generated or not.
NOTE: In 8bit ECC, MainECCLock should be cleared before initiating InitMECC.
2. Whenever data is written, the 8bit ECC module generates ECC parity code internally.
3. After you finish writing 512-byte data (not include spare area data), the parity codes are automatically updated
to NF8MECC0, NFMECC1, NF8MECC2, NF8MECC3 register. If you use 512-byte NAND flash memory, you
can program these values directly to spare area. However, if you use NAND flash memory more than 512-
byte page, you can’t program immediately. In this case, you have to copy these parity codes to other memory
like DRAM. After writing all main data, you can write the copied ECC values to spare area.
The parity codes have self-correctable information include parity code itself.
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-9
4. To generate spare area ECC parity code, set the MsgLength to 1(24-byte message length), and set the
ECCType to “01”(enable 8bit ECC). 8bit ECC module generates the ECC parity code for 24-byte data. In
order to initiating the module, you have to write ‘1’ on the InitMECC (NFCONT[5]) bit after clearing the
MainECCLock (NFCONT[7]) bit to ‘0’(Unlock).
MainECCLock (NFCONT[7]) bit controls whether ECC Parity code is generated or not.
NOTE: In 8bit ECC, MainECCLock should be cleared before initiating InitMECC.
5. Whenever data is written, the 8bit ECC module generates ECC parity code internally.
6. When you finish writing 24-byte meta or extra data, the parity codes are automatically updated to
NF8MECC0, NFMECC1, NF8MECC2, NF8MECC3 register. You can program these parity codes to spare
area. The parity codes have self-correctable information include parity code itself.
10.6 8-BIT ECC PROGRAMMING GUIDE (DECODING)
1. To use 8bit ECC in software mode, set the MsgLength to 0(512-byte message length) and set the ECCType
to “01”(enable 8bit ECC). 8bit ECC module generates ECC parity code for 512-byte read data. In order to
initiating 8bit ECC module, you have to write ‘1’ on the InitMECC (NFCONT[5]) bit after clearing the
MainECCLock (NFCONT[7]) bit to ‘0’(Unlock).
MainECCLock (NFCONT[7]) bit controls whether ECC Parity code is generated or not.
NOTE: In 8bit ECC, MainECCLock should be cleared before InitMECC
2. Whenever data is read, the MLC ECC module generates ECC parity code internally.
3. After you complete the reading of 512-byte data (not including spare area data), you must set the
MainECCLock (NFCONT[7]) bit to ‘1’(Lock) and have to read parity codes. 8bit ECC module needs parity
codes to detect whether error bits exists or not. So you have to read the ECC parity code of 512-byte main
data right after reading the 512-byte data. Once the ECC parity code is read, 8bit ECC engine starts
searching any error internally. 8bit ECC error searching engine needs minimum 372 cycles to find any error.
During this time, you can continue reading data from external NAND flash memory.
ECCDecDone(NFSTAT[6]) can be used to check whether ECC decoding is completed or not.
4. When ECCDecDone (NFSTAT[6]) is set (‘1’), NF8ECCERR0 indicates whether error bit exists or not. If any
error exists, you can fix it by referencing NF8ECCERR0/1/2 and NFMLC8BITPT0/1 register.
5. If you have more main data to read, continue doing from step 1.
6. For meta data error check, set the MsgLength to 1(24-byte message length) and set the ECCType to
“01”(enable 8bit ECC). ECC module generates the ECC parity code for 24-byte data. In order to initiating the
8bit ECC module, you have to write ‘1’ on the InitMECC (NFCONT[5]) bit after clearing the MainECCLock
(NFCONT[7]) bit to ‘0’(Unlock).
MainECCLock (NFCONT[7]) bit controls whether ECC Parity code is generated or not.
7. Whenever data is read, the 8bit ECC module generates ECC parity code internally.
8. After you complete reading 24-byte, you must set the MainECCLock (NFCONT[7]) bit to ‘1’(Lock) and read
the parity code for 24-byte data. MLC ECC module needs parity codes to detect whether error bits exists or
not. So you have to read ECC parity codes right after reading 24-byte data. Once ECC parity code is read,
8bit ECC engine starts searching any error internally. 8bit ECC error searching engine needs minimum 372
cycles to find any error. During this time, you can continue reading main data from external NAND flash
memory. ECCDecDone(NFSTAT[6]) can be used to check whether ECC decoding is completed or not.
9. When ECCDecDone (NFSTAT[6]) is set (‘1’), NF8ECCERR0 indicates whether error bit exist or not. If any
error exists, you can fix it by referencing NF8ECCERR0/1/2 and NF8MLCBITPT register.
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-10
11 MEMORY MAPPING(NAND BOOT AND OTHER BOOT)
SRAM
(8KB)
SDRAM
(nSCS1)
SDRAM
(nSCS0)
SROM
(nRCS5)
SROM
(nRCS4)
SROM
(nRCS3)
SROM
(nRCS2)
SROM
(nRCS1)
SROM
(nRCS0)
Using OneNAND
for boot ROM
SRAM
(8KB)
SDRAM
(nSCS1)
SDRAM
(nSCS0)
SROM
(nRCS5)
SROM
(nRCS4)
ROM
(nRCS3)
SROM
(nRCS2)
SROM
(nRCS1)
Internal
iROM
Using iROM for
boot ROM
MPORT1
MPORT0
0x1800_0000
0x0000_0000
0x0800_0000
0x1000_0000
0x2000_0000
0x2800_0000
0x3000_0000
0x3800_0000
0x40000_0000
Figure 7-5. NAND Flash Memory Mapping Block Diagram
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-11
12 NAND FLASH MEMORY CONFIGURATION
Figure 7-6. A 8-bit NAND Flash Memory Interface Block Diagram
NOTE: NAND CONTROLLER can support to control two nand flash memories .
NAND CS Other BOOT
nFCE NAND CONTROLLER CS0 Configurable
nRCS[1] NAND CONTROLLER CS1 Configurable
If you want NAND BOOT by IROM, nFCE must be used to boot.
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-12
13 NAND FLASH CONTROLLER SPECIAL REGISTERS
13.1 NAND FLASH CONTROLLER REGISTER MAP
Address R/W Reset value Name Description
Base + 0x00 R/W 0xX000_100X NFCONF Configuration register
Base + 0x04 R/W 0x0001_00C6 NFCONT Control register
Base + 0x08 R/W 0x0000_0000 NFCMMD Command register
Base + 0x0c R/W 0x0000_0000 NFADDR Address register
Base + 0x10 R/W 0xXXXX_XXXX NFDATA Data register
Base + 0x14 R/W 0x0000_0000 NFMECCD0 1st and 2nd main ECC data register
Base + 0x18 R/W 0x0000_0000 NFMECCD1 3rd and 4th main ECC data register
Base + 0x1c R/W 0x0000_0000 NFSECCD Spare ECC read register
Base + 0x20 R/W 0x0000_0000 NFSBLK Programmable start block address register
Base + 0x24 R/W 0x0000_0000 NFEBLK Programmable end block address register
Base + 0x28 R/W 0x0080_001D NFSTAT NAND status registet
Base + 0x2C R 0xXXXX_XXXX NFECCERR0 ECC error status0 register
Base + 0x30 R 0x0000_0000 NFECCERR1 ECC error status1 register
Base + 0x34 R 0xXXXX_XXXX NFMECC0 Generated ECC status0 register
Base + 0x38 R 0xXXXX_XXXX NFMECC1 Generated ECC status1 register
Base + 0x3C R 0xXXXX_XXXX NFSECC Generated Spare area ECC status register
Base + 0x40 R 0x0000_0000 NFMLCBITPT 4-bit ECC error bit pattern register
Base + 0x44 R 0x4000_0000 NF8ECCERR0 8bit ECC error status0 register
Base + 0x48 R 0x0000_0000 NF8ECCERR1 8bit ECC error status1 register
Base + 0x4C R 0x0000_0000 NF8ECCERR2 8bit ECC error status2 register
Base + 0x50 R 0xXXXX_XXXX NFM8ECC0 Generated 8-bit ECC status0 register
Base + 0x54 R 0xXXXX_XXXX NFM8ECC1 Generated 8-bit ECC status1 register
Base + 0x58 R 0xXXXX_XXXX NFM8ECC2 Generated 8-bit ECC status2 register
Base + 0x5C R 0xXXXX_XXXX NFM8ECC3 Generated 8-bit ECC status3 register
Base + 0x60 R 0x0000_0000 NFMLC8BITPT0 8-bit ECC error bit pattern 0 register
Base + 0x64 R 0x0000_0000 NFMLC8BITPT1 8-bit ECC error bit pattern 1 register
Base = 0x4E00_0000
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-13
13.2 NAND FLASH CONFIGURATION REGISTER
Register Address R/W Description Reset Value
NFCONF 0x4E000000 R/W NAND Flash Configuration register 0xX000100X
NFCONF Bit Description Initial State
Reserved [31] Reserved 0
Reserved [30] Should be 0 0
Reserved [29:26] Reserved 0000
MsgLength [25] Message (Data) length for 4/8 bit ECC
0 = 512-byte
1 = 24-byte
0
ECCType [24:23] This bit indicates what kind of ECC should be used.
00 = 1-bit ECC
10 = 4-bit ECC
01 = 8-bit ECC
Note: Don’t confuse the value of 4-bit ECC and 8-bit ECC.
H/W Set
(CfgBootEcc)
Reserved [22:15] Reserved 000000000
TACLS [14:12] CLE & ALE duration setting value (0~7)
Duration = HCLK x TACLS
001
Reserved [11] Reserved 0
TWRPH0 [10:8] TWRPH0 duration setting value (0~7)
Duration = HCLK x ( TWRPH0 + 1 )
000
Reserved [7] Reserved 0
TWRPH1 [6:4] TWRPH1 duration setting value (0~7)
Duration = HCLK x ( TWRPH1 + 1 )
000
PageSize [3] This bit indicates the page size of NAND Flash Memory
When PageSize_Ext is 1, the value of PageSize means
following:
0 = 512 Bytes/page, 1 = 2048 Bytes/page
When PageSize_Ext is 0, the value of PageSize means
following:
0 = 2048 Bytes/page, 1 = 4096 Bytes/page
H/W Set
(CfgAdvFlash)
PageSize_Ext [2] This bit indicated what kind of NAND Flash memory is used.
0 = Large Size NAND Flash
1 = Small Size NAND Flash
This bit is determined by OM[2] pin status on reset and wake-
up time from sleep mode.
This bit can be changed by software later.
1
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-14
NFCONF Bit Description Initial State
AddrCycle [1] This bit indicates the number of Address cycle of NAND Flash
memory.
When Page Size is 512 Bytes,
0 = 3 address cycle
1 = 4 address cycle
When page size is 2K or 4K,
0 = 4 address cycle
1 = 5 address cycle
This bit is determined by OM[1] pin on reset and wake-up
time from sleep mode.
This bit can be changed by software later.
H/W Set
(CfgAddrCycle)
BusWidth [0] This bit indicates the I/O bus width of NAND Flash Memory.
The value of BusWidth means the followings.
0 = 8-bit bus
This bit has no meaning in NAND-boot by IROM, when the
I/O bus width is only 8-bit. BusWidth has effects on normal
access.. This bit should be 0
H/W Set
(CfgBusWidth)
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-15
13.3 CONTROL REGISTER
Register Address R/W Description Reset Value
NFCONT 0x4E000004 R/W NAND Flash control register 0x000100C6
NFCONT Bit Description Initial State
Reserved [31:19] Reserved 0
ECC Direction [18] 4-bit, 8-bitECC encoding / decoding control
0 = Decoding 4-bit, 8bit ECC, It is used for page read
1 = Encoding 4-bit, 8-bit ECC, It is be used for page program
0
Lock-tight [17] Lock-tight configuration
0 = Disable lock-tight
1 = Enable lock-tight,
Once this bit is set to 1, you cannot clear. Only reset or wake
up from sleep mode can make this bit disable (cannot
cleared by software).
When it is set to 1, the area setting in NFSBLK
(0x4E000020) to NFEBLK (0x4E000024) is unlocked, and
except this area, write or erase command will be invalid and
only read command is valid.
When you try to write or erase locked area, the illegal
access will be occurred (NFSTAT [5] bit will be set).
If the NFSBLK and NFEBLK are same, entire area will be
locked.
0
Soft Lock [16] Soft Lock configuration
0 = Disable lock
1 = Enable lock
Soft lock area can be modified at any time by software.
When it is set to 1, the area setting in NFSBLK
(0x4E000020) to NFEBLK (0x4E000024) is unlocked, and
except this area, write or erase command will be invalid and
only read command is valid.
When you try to write or erase locked area, the illegal
access will be occurred (NFSTAT [5] bit will be set).
If the NFSBLK and NFEBLK are same, entire area will be
locked.
1
Reserved [15:13] Reserved. Should be written to 0. 000
EnbECCDecINT [12] 4-bit, 8-bit ECC decoding completion interrupt control
0 = Disable interrupt
1 = Enable interrupt
0
8bit Stop [11] 8-bit ECC encoding/decoding operation initialization 0
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-16
NFCONT Bit Description Initial State
EnbIllegalAccINT [10] Illegal access interrupt control
0 = Disable interrupt
1 = Enable interrupt
Illegal access interrupt will occurs when CPU tries to
program or erase locking area (the area setting in NFSBLK
(0x4E000020) to NFEBLK (0x4E000024)).
0
EnbRnBINT [9] RnB status input signal transition interrupt control
0 = Disable RnB interrupt
1 = Enable RnB interrupt
0
RnB_TransMode [8] RnB transition detection configuration
0 = Detect rising edge
1 = Detect falling edge
0
MainECCLock [7] Lock Main area ECC generation
0 = Unlock Main area ECC
1 = Lock Main area ECC
Main area ECC status register is
NFMECC0/1(0x4E000034/38),
1
SpareECCLock [6] Lock Spare area ECC generation.
0 = Unlock Spare ECC
1 = Lock Spare ECC
Spare area ECC status register is NFSECC(0x4E00003C),
1
InitMECC [5] 1 = Initialize main area ECC decoder/encoder (write-only) 0
InitSECC [4] 1 = Initialize spare area ECC decoder/encoder (write-only) 0
Reserved [3] Reserved 0
Reg_nCE1 [2] NAND Flash Memory nRCS[1] signal control
0 = Force nRCS[1] to low(Enable chip select)
1 = Force nRCS[1] to High(Disable chip select)
Note: Even Reg_nCE1 and Reg_nCE0 are set to zero
simultaneously, only one of them is asserted.
1
Reg_nCE0 [1] NAND Flash Memory nFCE signal control
0 = Force nFCE to low(Enable chip select)
1 = Force nFCE to High(Disable chip select)
Note: During boot time, it is controlled automatically.
This value is only valid while MODE bit is 1
1
MODE [0] NAND Flash controller operating mode
0 = NAND Flash Controller Disable (Don’t work)
1 = NAND Flash Controller Enable
0
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-17
13.4 COMMAND REGISTER
Register Address R/W Description Reset Value
NFCMMD 0x4E000008 R/W NAND Flash command set register 0x00
NFCMMD Bit Description Initial State
Reserved [31:8] Reserved 0x00
NFCMMD [7:0] NAND Flash memory command value 0x00
13.5 ADDRESS REGISTER
Register Address R/W Description Reset Value
NFADDR 0x4E00000C R/W NAND Flash address set register 0x0000XX00
REG_ADDR Bit Description Initial State
Reserved [31:8] Reserved 0x00
NFADDR [7:0] NAND Flash memory address value 0x00
13.6 DATA REGISTER
Register Address R/W Description Reset Value
NFDATA 0x4E000010 R/W NAND Flash data register 0xXXXX
NFDATA Bit Description Initial State
NFDATA [31:0] NAND Flash read/program data value for I/O
Note: Refer to Data Register Configuration.
0xXXXX
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-18
13.7 MAIN DATA AREA ECC REGISTER
Register Address R/W Description Reset Value
NFMECCD0 0x4E000014 R/W NAND Flash ECC 1st 2nd register for main area data read
Note: Refer to ECC Module Features.
0x00000000
NFMECCD1 0x4E000018 R/W NAND Flash ECC 3rd 4th register for main area data read
Note: Refer to ECC Module Features.
0x00000000
NFMECCD0 Bit Description Initial State
Reserved [31:24] Not used 0x00
ECCData1 [23:16] ECC1 for I/O[7:0] 0x00
Reserved [15:8] Not used 0x00
ECCData0 [7:0] ECC0 for I/O[7:0] 0x00
NOTE: Only word access is valid.
NFMECCD1 Bit Description Initial State
Reserved [31:24] Not used 0x00
ECCData3 [23:16] ECC3 for I/O[7:0] 0x00
Reserved [15:8] Not used 0x00
ECCData2 [7:0] ECC2 for I/O[7:0] 0x00
13.8 SPARE AREA ECC REGISTER
Register Address R/W Description Reset Value
NFSECCD 0x4E00001C R/W NAND Flash ECC(Error Correction Code) register for spare
area data read 0x00000000
NFSECCD Bit Description Initial State
Reserved [31:24] Not used 0x00
SECCData1 [23:16]
2nd Spare area ECC for I/O[7:0] 0x00
Reserved [15:8] Not used 0x00
SECCData0 [7:0]
1st Spare area ECC for I/O[ 7:0] 0x00
NOTE: Only word or half word access is valid.
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-19
13.9 PROGRMMABLE BLOCK ADDRESS REGISTER
Register Address R/W Description Reset Value
NFSBLK 0x4E000020 R/W NAND Flash programmable start block address 0x000000
NFEBLK 0x4E000024 R/W NAND Flash programmable end block address
Nand Flash can be programmed between start and end
address.
When the Soft lock or Lock-tight is enabled and the Start
and End address has same value, Entire area of NAND
flash will be locked.
0x000000
NFSBLK Bit Description Initial State
Reserved [31:24] Reserved 0x00
SBLK_ADDR2 [23:16]
The 3rd block address of the block erase operation 0x00
SBLK_ADDR1 [15:8]
The 2nd block address of the block erase operation 0x00
SBLK_ADDR0 [7:0]
The 1st block address of the block erase operation
(Only bit [7:5] are valid)
0x00
NFEBLK Bit Description Initial State
Reserved [31:24] Reserved 0x00
EBLK_ADDR2 [23:16]
The 3rd block address of the block erase operation 0x00
EBLK_ADDR1 [15:8]
The 2nd block address of the block erase operation 0x00
EBLK_ADDR0 [7:0]
The 1st block address of the block erase operation
(Only bit [7:5] are valid)
0x00
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-20
The NFSLK and NFEBLK can be changed while Soft lock bit(NFCONT[16]) is enabled. But cannot be changed
when Lock-tight bit(NFCONT[17]) is set.
when Lock-tight =1
or SoftLock=1
NAND flash memory
Locked area
(Read only)
Prorammable/
Readable
Area
Locked area
(Read only)
NFSBLK
Address
High
Low
NFEBLK+1
NFEBLK
NFSBLK Locked Area
(Read only)
When NFSBLK > NFEBLK
NFEBLK
Figure 7-7. Softlock and Lock-tight
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-21
13.10 NFCON STATUS REGISTER
Register Address R/W Description Reset Value
NFSTAT 0x4E000028 R/W NAND Flash operation status register 0x0080001D
NFSTAT Bit Description Initial State
Reserved [31:24] Read undefined 0x00
Reserved [23:7] Reserved 0x00
ECCDecDone [6] When 4-bit ECC or 8-bit ECC decoding is finished, this value set
and issue interrupt if enabled. The NFMLCBITPT, NFMLCL0 and
NFMLCEL1 have valid values. To clear this, write ‘1’.
1 = 4-bit ECC or 8-bit ECC decoding is completed
0
IllegalAccess [5] Once Soft Lock or Lock-tight is enabled, The illegal access
(program, erase) to the memory makes this bit set.
0 = Illegal access is not detected
1 = Illegal access is detected
0
RnB_TransDetect [4] When RnB low to high transition is occurred, this value set and
issue interrupt if enabled. To clear this write ‘1’.
0 = RnB transition is not detected
1 = RnB transition is detected
Transition configuration is set in RnB_TransMode(NFCONT[8]).
1
NCE[1]
(Read-only) [3] The status of nRCS[1] output pin 1
NCE[0]
(Read-only) [2] The status of nFCE output pin 1
Reserved [1] Reserved 0
RnB
(Read-only) [0] The status of RnB input pin.
0 = NAND Flash memory busy
1 = NAND Flash memory ready to operate
1
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-22
13.11 ECC0/1 ERROR STATUS REGISTER
Register Address R/W Description Reset Value
NFECCERR0 0x4E00002C R NAND Flash ECC Error Status register for I/O [7:0] 0xX0XX_XXXX
NFECCERR1 0x4E000030 R NAND Flash ECC Error Status register for I/O [7:0] 0x0000_0000
13.11.1 When ECCType is 1-bit ECC.
NFECCERR0 Bit Description Initial State
Reserved [31:25] Reserved 0x00
SErrorDataNo [24:21] In spare area, Indicates which number data is error 0011
SErrorBitNo [20:18] In spare area, Indicates which bit is error 111
MErrorDataNo [17:7] In main data area, Indicates which number data is error 0x7FF
MErrorBitNo [6:4] In main data area, Indicates which bit is error 111
SpareError [3:2] Indicates whether spare area bit fail error occurred
00 = No Error
01 = 1-bit error(correctable)
10 = Uncorrectable
11 = ECC area error
10
MainError [1:0] Indicates whether main data area bit fail error occurred
00 = No Error
01 = 1-bit error(correctable)
10 = Uncorrectable
11 = ECC area error
10
NFECCERR1 Bit Description Initial State
Reserved [31:0] Reserved 0x00
NOTE: The above values are only valid when both ECC register and ECC status register have valid value.
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-23
13.11.2 When ECCType is 4-bit ECC.
NFECCERR0 Bit Description Initial State
ECC Busy [31] Indicates the 4-bit ECC decoding engine is searching
whether a error exists or not
0 = Idle
1 = Busy
0
ECC Ready [30] ECC Ready bit 1
Reserved [29] Reserved 0
4-bit MECC Error [28:26] 4-bit ECC decoding result
000 = No error
001 = 1-bit error
010 = 2-bit error
011 = 3-bit error
100 = 4-bit error
101 = Uncorrectable
11x = reserved
Note: If it happens that there are more errors than 4 bits, 4-bit
ECC module does not ensure right detection.
000
2nd Bit Error Location [25:16] Error byte location of 2nd bit error 0x00
Reserved [15:10] Reserved
1st Bit Error Location [9:0] Error byte location of 1st bit error 0x00
NOTE: These values are updated when ECCDecDone (NFSTAT[6]) is set (‘1’).
NFECCERR1 Bit Description Initial State
Reserved [31:26] Reserved 0x00
4th Bit Error Location [25:16] Error byte location of 4th bit error 0x00
Reserved [15:10] Reserved
3rd Bit Error Location [9:0] Error byte location of 3rd bit error 0x00
NOTE: These values are updated when ECCDecDone (NFSTAT[6]) is set (‘1’).
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-24
13.12 MAIN DATA AREA ECC0 STATUS REGISTER
Register Address R/W Description Reset Value
NFMECC0 0x4E000034 R NAND Flash ECC status register 0xXXXXXX
NFMECC1 0x4E000038 R NAND Flash ECC status register 0xXXXXXX
13.12.1 When ECCType is 1-bit ECC
NFMECC0 Bit Description Initial State
MECC0_3 [31:24] ECC3 for data[7:0] 0xXX
MECC0_2 [23:16] ECC2 for data[7:0] 0xXX
MECC0_1 [15:8] ECC1 for data[7:0] 0xXX
MECC0_0 [7:0] ECC0 for data[7:0] 0xXX
NFMECC1 Bit Description Initial State
Reserved [31:0] Reserved 0x00000000
NOTE: The NAND flash controller generate NFMECC when read or write main area data while the MainECCLock
(NFCONT[7]) bit is ‘0’(Unlock).
13.12.2 When ECCType is 4-bit ECC.
NFMECC0 Bit Description Initial State
4th Parity [31:24] 4th Check Parity generated from main area 0x00
3rd Parity [23:16] 3rd Check Parity generated from main area 0x00
2nd Parity [15:8] 2nd Check Parity generated from main area 0x00
1st Parity [7:0] 1st Check Parity generated from main area 0x00
NFMECC1 Bit Description Initial State
Reserved [31:24] Reserved 0x00
7th Parity [23:16] 7th Check Parity generated from main area 0x00
6th Parity [15:8] 6th Check Parity generated from main area 0x00
5th Parity [7:0] 5th Check Parity generated from main area 0x00
NOTE: The NAND flash controller generate these ECC parity codes when write main area data while the MainECCLock
(NFCONT[7]) bit is ‘0’ (unlock).
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-25
13.13 SPARE AREA ECC STATUS REGISTER
Register Address R/W Description Reset Value
NFSECC 0x4E00003C R NAND Flash ECC register for I/O [7:0] 0xXXXXXX
NFSECC Bit Description Initial State
Reserved [31:16] Reserved 0xXXXX
SECC0_1 [15:8] Spare area ECC1 Status for I/O[7:0] 0xXX
SECC0_0 [7:0] Spare area ECC0 Status for I/O[7:0] 0xXX
NOTE: The NAND flash controller generate NFSECC when read or write spare area data while the SpareECCLock
(NFCONT[6]) bit is ‘0’ (Unlock).
13.14 4-BIT ECC ERROR PATTEN REGISTER
Register Address R/W Description Reset Value
NFMLCBITPT 0x4E000040 R NAND Flash 4-bit ECC Error Pattern register for
data[7:0] 0x00000000
NFMLCBITPT Bit Description Initial State
4th Error bit pattern [31:24] 4th Error bit pattern 0x00
3rd Error bit pattern [23:16] 3rd Error bit pattern 0x00
2nd Error bit pattern [15:8] 2nd Error bit pattern 0x00
1st Error bit pattern [7:0] 1st Error bit pattern 0x00
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-26
13.15 ECC 0/1/2 FOR 8BIT ECC STATUS REGISTER
Register Address R/W Description Reset Value
NF8ECCERR0 0x4E00_0044 R NAND Flash ECC Error Status register 0 0x4000_0000
NF8ECCERR1 0x4E00_0048 R NAND Flash ECC Error Status register 1 0x0000_0000
NF8ECCERR2 0x4E00_004C R NAND Flash ECC Error Status register 2 0x0000_0000
NFECCERR0 Bit Description Initial State
MLC8ECCBusy [31] Indicates the 8-bit ECC decoding engine is searching
whether a error exists or not
0 = Idle 1 = Busy
b’0
MLC8ECCReady [30] ECC Ready bit b’1
Reserved [29] Reserved b’0
MLC8ECCError [28:25] 8-bit ECC decoding result
0000 = No error 0001 = 1-bit error
0010 = 2-bit error 0011 = 3-bit error
0100 = 4-bit error 0101 = 5-bit error
0110 = 6-bit error 0111 = 7-bit error
1000 = 8-bit error 1001 = Uncorrectable
1010 ~1111 = reserved
b’0000
MLC8ErrLocation2 [24:15]
Error byte location of 2nd bit error 0x000
Reserved [14:10] Reserved 0x00
MLC8ErrLocation1 [9:0]
Error byte location of 1st bit error 0x000
NOTE: These values are updated when ECCDecodeDone (NFSTAT[6]) is set (‘1’).
NFECCERR1 Bit Description Initial State
MLCErrLocation5 [31:22]
Error byte location of 5th bit error 0x000
Reserved [21] Reserved b’0
MLCErrLocation4 [20:11]
Error byte location of 4th bit error 0x000
Reserved [10] Reserved b’0
MLCErrLocation3 [9:0]
Error byte location of 3rd bit error 0x000
NOTE: These values are updated when ECCDecodeDone (NFSTAT[6]) is set (‘1’).
NFECCERR1 Bit Description Initial State
MLCErrLocation8 [31:22]
Error byte location of 8th bit error 0x000
Reserved [21] Reserved b’0
MLCErrLocation7 [20:11]
Error byte location of 7th bit error 0x000
Reserved [10] Reserved b’0
MLCErrLocation6 [9:0]
Error byte location of 6th bit error 0x000
NOTE: These values are updated when ECCDecodeDone (NFSTAT[6]) is set (‘1’).
S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-27
13.16 8BIT ECC MAIN DATA ECC 0/1/2/3 STATUS REGISTER
Register Address R/W Description Reset Value
NFM8ECC0 0x4E00_0050 R 8bit ECC status register 0xXXXX_XXXX
NFM8ECC1 0x4E00_0054 R 8bit ECC status register 0xXXXX_XXXX
NFM8ECC2 0x4E00_0058 R 8bit ECC status register 0xXXXX_XXXX
NFM8ECC3 0x4E00_005C R 8bit ECC status register 0xXXXX_XXXX
NFM8ECC0 Bit Description Initial State
4th Parity [31:24] 4th Check Parity generated from main area (512-byte) 0xXX
3rd Parity [23:16] 3rd Check Parity generated from main area (512-byte) 0xXX
2nd Parity [15:8] 2nd Check Parity generated from main area (512-byte) 0xXX
1st Parity [7:0] 1st Check Parity generated from main area (512-byte) 0xXX
NFM8ECC1 Bit Description Initial State
8th Parity [31:24] 8th Check Parity generated from main area (512-byte) 0xXX
7th Parity [23:16] 7th Check Parity generated from main area (512-byte) 0xXX
6th Parity [15:8] 6th Check Parity generated from main area (512-byte) 0xXX
5th Parity [7:0] 5th Check Parity generated from main area (512-byte) 0xXX
NFM8ECC2 Bit Description Initial State
12th Parity [31:24] 12th Check Parity generated from main area (512-byte) 0xXX
11th Parity [23:16] 11th Check Parity generated from main area (512-byte) 0xXX
10th Parity [15:8] 10th Check Parity generated from main area (512-byte) 0xXX
9th Parity [7:0] 9th Check Parity generated from main area (512-byte) 0xXX
NFM8ECC3 Bit Description Initial State
Reserved [31:8] Reserved 0x000000
13th Parity [7:0] 13th Check Parity generated from main area (512-byte) 0x00
NOTE: The NAND flash controller generate these ECC parity codes when write main area data while the MainECCLock
(NFCON[7]) bit is ‘0’(unlock).
NAND FLASH CONTROLLER S3C2450X RISC MICROPROCESSOR
7-28
13.17 8BIT ECC ERROR PATTERN REGISTER
Register Address R/W Description Reset Value
NFMLC8BITPT0 0x4E00_0060 R NAND Flash 8-bit ECC Error Pattern register0 for
data[7:0] 0x0000_0000
NFMLC8BITPT1 0x4E00_0064 R NAND Flash 8-bit ECC Error Pattern register1 for
data[7:0] 0x0000_0000
NFMLC8BITPT0 Bit Description Initial State
4th Error bit pattern [31:24] 4th Error bit pattern 0x00
3rd Error bit pattern [23:16] 3rd Error bit pattern 0x00
2nd Error bit pattern [15:8] 2nd Error bit pattern 0x00
1st Error bit pattern [7:0] 1st Error bit pattern 0x00
NFMLC8BITPT1 Bit Description Initial State
8th Error bit pattern [31:24] 8th Error bit pattern 0x00
7th Error bit pattern [23:16] 7th Error bit pattern 0x00
6th Error bit pattern [15:8] 6th Error bit pattern 0x00
5th Error bit pattern [7:0] 5th Error bit pattern 0x00
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-1
8 CF CONTROLLER
1 OVERVIEW
CF controller supports PC card memory/IO mode & True-IDE mode.
CF controller is compatible with CF standard spec. R3.0.
1.1 FEATURES
1.1.1 The CF Controller Features:
The CF controller supports only 1 slot.
The CF controller consists of 2 parts − PC card controller & ATA controller. They are multiplexing from or to PAD
signals. Users have to use the only 1 mode, PC card or True-IDE mode. Default mode is PC card mode. The CF
controller has a top level SFR that has card power enable bit, output port enable bit & mode select (True-IDE or
PC card) bit.
1.1.2 The PC Card Controller Features:
The PC card controller has 2 half-word (16bits) write buffers & 4 half-word (16bits) read buffers.
The PC card controller has 5 word-sized (32bits) Special Function Registers.
• 3 timing configuration registers. (Attribute memory, Common memory, I/O interface)
• 1 status & control configuration register
• 1 interrupt source & mask register
Timing configuration register consists of 3 parts − Setup, Command & Hold.
• PC card interface has 4 state (IDLE, SETUP, COMMAND & HOLD)
• Each part of register indicates the operation timing of each state.
1.1.3 The ATA Controller Features:
The ATA controller is compatible with the ATA/ATAPI-6 standard.
The ATA controller support only PIO mode.
The ATA controller has 30 word-sized (32bits) Special Function Registers.
The ATA controller has 1 FIFO that is 16 x 32bit.
The ATA controller has internal DMA controller (from ATA device to memory or from memory to ATA device).
AHB master (DMA controller) support 8 burst & word size transfer.
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-2
1.2 SIGNAL DESCRIPTION
CF Interface Signals Pins I/O Description
nCD_CF 1 I
Card detect signals (software control by GPIO MISCCR[30])
nIREQ_CF(EINT[19])
1 I
Interrupt request from CF card.
PC card mode: active low (memory mode: level triggering,
I/O mode: edge triggering). True-IDE mode: active high
nWAIT_CF(nWAIT) 1 I
Wait signal from CF card
nINPACK(EINT[20])
1 I
Input acknowledge in I/O mode
PC card mode: not used
True-IDE mode: DMA request
nCE1_CF(nRCS[2]) 1 O
Card enable strobe
PC card mode : lower byte enable strobe
True-IDE mode : chip selection (nCS0)
nCE2_CF(nRCS[3]) 1 O
Card enable strobe
PC card mode: higher byte enable strobe
True-IDE mode: chip selection (nCS1)
nREG_CF(EINT[21])
1 O
Register in CF card strobe
PC card mode: It is used for accessing register in CF card
True-IDE mode: DMA Acknowledge
nOE_CF(nOE_CF) 1 O
Output enable strobe
PC card mode: output enable strobe for memory
True-IDE mode: GND.
nWE_CF(nWE_CF) 1 O
Write enable strobe
PC card mode: output enable strobe for memory
True-IDE mode: VCC.
nIORD_CF(nROE) 1 O
Read strobe for I/O mode
nIOWR_CF(nRWE) 1 O
Write strobe for I/O mode
RESET_CF(EINT[22])
1 O
CF card reset
PC card mode: active high
True-IDE mode: active low
ADDR_CF(RADDR[10:0]) 11 O
CF card address
PC card mode: full address use
True-IDE mode: only ADDR[2:0] use, The other address line is
connected to GND.
DATA_CF(RDATA[15:0]) 16 I/O
CF data bus
CARD_PWREN(EINT[23]) 1 O
Card power enable strobe (active low)
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-3
1.3 BLOCK DIAGRAM
1.3.1 Top-Level Block Diagram
A top-level block diagram of the overall CF controller is shown below in Figure 8-1.
CF card
Output pad enble
IDE mode
Card power enable
AHB master IF
AHB slave IF
HADDR
CF controller
AHB Back born
Top level
SFR
PC card controller
ATA controller
Address
decoder
Figure 8-1. CF Controller Top Block Diagram
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-4
1.3.2 PC Card Controller Block Diagram
A top-level block diagram of the PC card controller is shown below in Figure 8-2.
PC card controller Block
HRDATA
HWDATA
ADDR
nWE,nOE
nIOWR, nIORD
nREG
WDATA
11
16
nCE1, nCE2
nWAIT
nCD
Write_dir
32
32
RDATA
AHB ADDR
&
AHB Control signal
Main
Controller
Data
Buffer
&
Controller
16
Top
Controller
Special
Function
Register
Address
decoder
Address
&
Command
buffer
32
32
Figure 8-2. PC Card Controller Top Block Diagram
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-5
1.3.3 ATA Controller Block Diagram
A top-level block diagram of the ATA controller is shown below in Figure 8-3.
ATA
interface
control/interrupt
Data
control Data
control
PIO data
16
16
ATA write data
ATA read data
AHB slave IF
AHB master IF
ATA
interface
ATA controller Block
CRC
Transfer
control
Interrupt
source
Control/Status
Register
Configuration
Register
AHB
Slave
interface
16
FIFO
(32-bit x 16)
AHB
Master
interface
Figure 8-3. ATA Controller Top Block Diagram
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-6
1.4 TIMING DIAGRAM
1.4.1 PC Card Mode
SET UPIDLE COMMAND HOLD IDLE
nCE1
nCE2
IORD
IOWR
nOE
nWE
Figure 8-4. PC Card State Definition
Area Attribute memory I/O interface Common memory
(min, Max) nS
Set up (30, --) (70, --) (30, --)
Command (150, --) (165, --) (150, --)
Hold (30, --) (20, --) (20, --)
S + C + H (300, --) (290, --) (--, --)
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-7
1.4.2 True-IDE Mode
1.4.3 PIO Mode
PIO Mode Waveform
t2
t1
teoc
t1
CS0, CS1
DA[2:0]
DIOR-/
DIOW-
WR
DD[15:0] or
DD[7:0]
RD
DD[15:0] or
DD[7:0]
Figure 8-5. PIO Mode Waveform
1.4.4 Timing Parameter In PIO Mode
Table 8-1. Timing Parameter Each PIO Mode
PIO mode PIO 0 PIO 1 PIO 2 PIO 3 PIO 4
T1 (70, --) (50, --) (30, --) (30, --) (25, --)
T2 (16bit) (165, --) (125, --) (100, --) (80, --) (70, --)
T2 Register (8-bit) (290, --) (290, --) (290, --) (80, --) (70, --)
TEOC (20, --) (15, --) (10, --) (10, --) (10, --)
T1 + T2 + TEOC (600, --) (383, --) (240, --) (180, --) (120, --)
ATA_PIO_TIME (Tpara) = PIO mode (min, max) / system clock − 1
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-8
1.5 SPECIAL FUNCTION REGISTERS
1.5.1 Memory Map
Memory Map Diagram (HSEL_SLV_Base = 0x4B80_0000)
HSEL_SLV_Base + 0 x 1000
SFR_Base =
HSEL_SLV_Base + 0 x 1800
SFR_Base + 0 x 0188
SFR Area
Common Memory Area
I/O Area
Attribute Memory Area
Reserved Area
ATA controlller SFRs
Reserved Area
PC card controller SFRs
Reserved Area
MUX_REG
HSEL_SLV_Base + 0 x 0800
HSEL_SLV_Base + 0 x 0000
SFR_Base + 0 x 0100
SFR_Base + 0 x 0034
SFR_Base + 0 x 0020
SFR_Base + 0 x 0004
SFR_Base + 0 x 0000
Figure 8-6. Memory Map Diagram
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-9
1.5.2 Memory Map Table
Table 8-2. Memory Map Table
Register Address Description Reset Value
SFR_BASE 0x4B801800 CF card host controller base address
MUX_REG 0x4B801800 Top level control & configuration register 0x00000006
Reserved ~ 0x001C Reserved area
PCCARD_BASE 0x4B801820 PC card controller base address
PCCARD_CFG 0x4B801820 PC card configuration & status register 0x00000F07
PCCARD_INT 0x4B801824 PC card interrupt mask & source regiseter 0x00000700
PCCARD_ATTR 0x4B801828 PC card attribute memory area operation timing config
regiseter 0x00031909
PCCARD_I/O 0x4B80182C PC card I/O area operation timing config regiseter 0x00031909
PCCARD_COMM 0x4B801830 PC card common memory area operation timing
config regiseter 0x00031909
Reserved ~ 0x00FC Reserved area
ATA_BASE 0x4B801900 ATA controller base address
ATA_CONTROL 0x4B801900 ATA enable and clock down status 0x00000002
ATA_STATUS 0x4B801904 ATA status 0x00000000
ATA_COMMAND 0x4B801908 ATA command 0x00000000
ATA_SWRST 0x4B80190C ATA software reset 0x00000000
ATA_IRQ 0x4B801910 ATA interrupt sources 0x00000000
ATA_IRQ_MASK 0x4B801914 ATA interrut mask 0x0000001F
ATA_CFG 0x4B801918 ATA configuration for ATA interface 0x00000000
Reserved 0x4B80191C
~
0x4B801928
Reserved
ATA_PIO_TIME 0x4B80192C ATA PIO timing 0x0001C238
Reserved 0x4B801930 Reserved
ATA_XFR_NUM 0x4B801934 ATA transfer number 0x00000000
ATA_XFR_CNT 0x4B801938 ATA current transfer count 0x00000000
ATA_TBUF_START 0x4B80193C ATA start address of track buffer 0x00000000
ATA_TBUF_SIZE 0x4B801940 ATA size of track buffer 0x00000000
ATA_SBUF_START 0x4B801944 ATA start address of source buffer 0x00000000
ATA_SBUF_SIZE 0x4B801948 ATA size of source buffer 0x00000000
ATA_CADR_TBUF 0x4B80194C ATA current write address of track buffer 0x00000000
ATA_CADR_SBUF 0x4B801950 ATA current read address of source buffer 0x00000000
ATA_PIO_DTR 0x4B801954 ATA PIO device data register 0x00000000
ATA_PIO_FED 0x4B801958 ATA PIO device Feature/Error register 0x00000000
ATA_PIO_SCR 0x4B80195C ATA PIO sector count register 0x00000000
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-10
Register Address Description Reset Value
ATA_PIO_LLR 0x4B801960 ATA PIO device LBA low register 0x00000000
ATA_PIO_LMR 0x4B801964 ATA PIO device LBA middle register 0x00000000
ATA_PIO_LHR 0x4B801968 ATA PIO device LBA high register 0x00000000
ATA_PIO_DVR 0x4B80196C ATA PIO device register 0x00000000
ATA_PIO_CSD 0x4B801970 ATA PIO device command/status register 0x00000000
ATA_PIO_DAD 0x4B801974 ATA PIO device control/alternate status register 0x00000000
ATA_PIO_RDATA 0x4B80197C ATA PIO read data from device data register 0x00000000
BUS_FIFO_STATUS 0x4B801990 ATA internal AHB FIFO status 0x00000000
ATA_FIFO_STATUS 0x4B801994 ATA internal ATA FIFO status 0x00000000
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-11
2 INDIVIDUAL REGISTER DESCRIPTIONS
2.1 MUX_REG REGISTER
Register Address R/W Description Reset Value
MUX_REG 0x4B801800 R/W MUX_REG is used to set the internal mode, output
port enable & card power enable. 0x0000_0006
MUX_REG Bit Description R/W Reset Value
Reserved [31:3] Reserved bits R 0x0
OUTPUT_EN [2] Output port enable
0 = Output port enable
1 = Output port disable
R/W 0x1
CARDPWR_EN [1] Card power supply enable
0 = Card power on
1 = Card power off
R/W 0x1
IDE_MODE [0] Internal operation mode select
0 = PC card mode
1 = True-IDE mode
R/W 0x0
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-12
2.2 PCCARD CONFIGURATION & STATUS REGISTER
Register Address R/W Description Reset Value
PCCARD_CFG 0x4B801820 R/W PCCARD_CFG is used to set the configuration &
read the status of card. 0x0000_0F0
7
PCCARD_CFG Bits Description R/W Reset Value
Reserved [31:14] Reserved bits R 0x0
CARD_
RESET [13] CF card reset in PC card mode
0 = No reset
1 = Reset
R/W 0x0
INT_SEL [12] Card interrupt request type select
0 = Edge triggering
1 = Level triggering
R/W 0x0
nWAIT_EN [11] nWAIT(from CF card) enable
0 = Disable(always ready)
1 = Enable
R/W 0x1
DEVICE_ATT [10] Device type is 16bits or 8bits (Attribute memory area)
0 = 8-bit device
1 = 16-bit device
R/W 0x1
DEVICE_
COMM [9] Device type is 16bits or 8bits (Common memory area)
0 = 8-bit device
1 = 16-bit device
R/W 0x1
DEVICE_IO [8] Device type is 16bits or 8bits (I/O area)
0 = 8-bit device
1 = 16-bit device
R/W 0x1
Reserved [7:4] Reserved bits R 0x0
NOCARD_ERR [3] No card operation
0 = No error
1 = Error
R 0x0
nWAIT [2] nWAIT from CF card
0 = Wait
1 = Ready
R 0x1
nIREQ [1] Interrupt request from CF card
0 = Interrupt request
1 = No interrupt request
R 0x1
nCD [0] Card detect
0 = Card detect
1 = Card not detect
R 0x1
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-13
2.3 PCCARD INTERRUPT MASK & SOURCE REGISTER
Register Address R/W Description Reset Value
PCCARD_INT 0x4B801824 R/W PCCARD_INT is interrupt source & interrupt mask
register. 0x0000_0600
PCCARD_INT Bits Description R/W Reset Value
Reserved [31:11] Reserved bits R 0x0
INTMSK_ERR_
N [10] Interrupt mask bit of no card error
0 = Unmask
1 = Mask
R/W 0x1
INTMSK_IREQ [9] Interrupt mask bit of CF card interrupt request
0 = Unmask
1 = Mask
R/W 0x1
INTMSK_CD [8] Interrupt mask bit of CF card detect
0 = Unmask
1 = Mask
R/W 0x0
Reserved [7:3] Reserved bits R 0x0
INTSRC_ERR_N [2] When host access no card in slot.
CPU can clear this interrupt by writing “1”.
R/W 0x0
INTSRC_IREQ [1] When CF card interrupt request
CPU can clear this interrupt by writing “1”.
R/W 0x0
INTSRC_CD [0] When CF card is detected in slot
CPU can clear this interrupt by writing “1”.
R/W 0x0
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-14
2.4 PCCARD_ATTR REGISTER
Register Address R/W Description Reset Value
PCCARD_ATT
R 0x4B801828 R/W PCCARD_ATTR is used to set the card access
timing. 0x0003_1909
PCCARD_ATTR Bits Description R/W Reset Value
Reserved [31:23] Reserved bits R 0x0
HOLD_ATTR [22:16] Hold state timing of attribute memory area
Hold time = HCLK time * (HOLD_ATTR + 1) R/W 0x03
Reserved [15] Reserved bits R 0x0
CMND_ATTR [14:8] Command state timing of attribute memory area
Command time = HCLK time * (CMND_ATTR + 1) R/W 0x19
Reserved [7] Reserved bits R 0x0
SETUP_ATTR [6:0] Setup state timing of attribute memory area
Setup time = HCLK time * (SETUP_ATTR + 1) R/W 0x09
2.5 PCCARD_I/O REGISTER
Register Address R/W Description Reset Value
PCCARD_I/O 0x4B80182C R/W PCCARD_I/O is used to set the card access timing. 0x0003_1909
PCCARD_I/O Bits Description R/W Reset Value
Reserved [31:23] Reserved bits R 0x0
HOLD_IO [22:16] Hold state timing of I/O area
Hold time = HCLK time * (HOLD_IO + 1) R/W 0x03
Reserved [15] Reserved bits R 0x0
CMND_IO [14:8] Command state timing of I/O area
Command time = HCLK time * (CMND_IO + 1) R/W 0x19
Reserved [7] Reserved bits R 0x0
SETUP_IO [6:0] Setup state timing of I/O area
Setup time = HCLK time * (SETUP_IO + 1) R/W 0x09
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-15
2.6 PCCARD_COMM REGISTER
Register Address R/W Description Reset Value
PCCARD_COM
M 0x4B801830 R/W PCCARD_COMM is used to set the card access
timing. 0x0003_1909
PCCARD_COMM Bits Description R/W Reset Value
Reserved [31:23] Reserved bits R 0x0
HOLD_COMM [22:16] Hold state timing of common memory area
Hold time = HCLK time * (HOLD_COMM + 1) R/W 0x03
Reserved [15] Reserved bits R 0x0
CMND_COMM [14:8] Command state timing of common memory area
Command time = HCLK time * (CMND_COMM + 1) R/W 0x19
Reserved [7] Reserved bits R 0x0
SETUP_COMM [6:0] Setup state timing of common memory area
Setup time = HCLK time * (SETUP_COMM + 1) R/W 0x09
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-16
2.7 ATA_CONTROL REGISTER
Register Address R/W Description Reset Value
ATA_CONTROL 0x4B801900 R/W ATA Control register 0x0000_0002
ATA_CONTROL Bits Description R/W Reset Value
Reserved [31:2] Reserved bits R 0x0
clk_down_ready [1] Status for clock down
This bit is asserted in idle state when ATA_CONTROL bit
[0] is zero.
0 = not ready for clock down
1 = ready for clock down
R 0x1
ata_enable [0] ATA enable
0 = ATA is disabled and preparation for clock down
maybe in progress
1 = ATA is enabled.
R/W 0x0
2.8 ATA_STATUS REGISTER
Register Address R/W Description Reset Value
ATA_STATUS 0x4B801904 R ATA Status register 0x0000_0000
ATA_STATUS Bits Description R/W Reset Value
Reserved [31:6] Reserved bits R 0x0
atadev_cblid [5] ATA cable identification R 0x0
atadev_irq [4] ATA interrupt signal line R 0x0
atadev_iordy [3] ATA iordy signal line R 0x0
atadev_dmareq [2] ATA dmareq signal line R 0x0
xfr_state [1:0] Transfer state
2’b00 = Idle state
2’b01 = Transfer state
2’b11 = Wait for completion state
R 0x0
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-17
2.9 ATA_COMMAND REGISTER
Register Address R/W Description Reset Value
ATA_COMMAND 0x4B801908 R/W ATA Command register 0x0000_0000
ATA_COMMAND Bits Description R/W Reset Value
Reserved [31:2] Reserved bits R 0x0
xfr_command [1:0] ATA transfer command
Four command types (START, STOP, ABORT and
CONTINUE) are supported for data transfer control. The
“START” command is used to start data transfer. The
“STOP” command can pause transfer temporarily. The
“CONTINUE” command shall be used after “STOP”
command or internal state of “pause” when track buffer
is full. The “ABORT” command terminated current data
transfer sequences and make ATA host controller move
to idle state.
00 = command stop
01 = command start (Only available in idle state)
10 = command abort
11 = command continue (Only available in transfer
pause)
** After CPU commands ABORT, make a software reset
by ATA_SWRST to clear the leftover values of internal
registers.
R/W 0x0
The STOP command is a thing, which use when CPU wants to pause upon data transfer. When the CPU wants to
judge the transmission data is valid or not while transfer transmits, for a moment.
To send data continually, give a CONTINUE command to do data transmission continuously.
The STOP command does control ATA Device side signal but does not control DMA side. Namely, if the FIFO
has data after STOP command, DMA operation progresses until the FIFO has empty at read operation. In case of
write operation, the DMA acts the same way until the FIFO has full.
The ABORT command uses when the transmitting data has proved useless data or discontinues absurd state by
error interrupt from device.
At that time, all data in ATA Host controller (register, FIFO) cleared and the transmission state machine goes to
IDLE.
The Software Reset's meaning become clear all registers even though the ABORT command had been executed
before do configuration register set for next transmission. But it is not mandatory.
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-18
2.10 ATA_SWRST REGISTER
Register Address R/W Description Reset Value
ATA_SWRST 0x4B80190C R/W ATA S/W RESET register 0x0000_0000
ATA_SWRST Bits Description R/W Reset Value
Reserved [31:1] Reserved bits R 0x0
ata_swrstn [0] Software reset for the ATA host
0 = No reset
1 = Software reset for all ATA host module.
After software reset, to continue transfer, user must
configure all registers of host controller and device
registers.
R/W 0x0
2.11 ATA_IRQ REGISTER
Register Address R/W Description Reset Value
ATA_IRQ 0x4B801910 R/W ATA IRQ register 0x0000_0000
ATA_IRQ Bits Description R/W Reset Value
Reserved [31:5] Reserved bits R 0x0
sbuf_empty_int [4] When source buffer is empty.
CPU can clear this interrupt by writing “1”. R/W 0x0
tbuf_full_int [3] When track buffer is half full.
CPU can clear this interrupt by writing “1”. R/W 0x0
atadev_irq_int [2] When ATA device generates interrupt.
CPU can clear this interrupt by writing “1”. R/W 0x0
reserved [1] reserved R/W 0x0
xfr_done_int [0] When all data transfers are finished.
CPU can clear this interrupt by writing “1”. R/W 0x0
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-19
2.12 ATA_IRQ_MASK REGISTER
Register Address R/W Description Reset Value
ATA_IRQ_MASK 0x4B801914 R/W ATA IRQ MASK register 0x0000_001F
ATA_IRQ_MASK Bits Description R/W Reset Value
Reserved [31:5] Reserved bits R 0x0
mask_sbut_
empty_int [4] Interrupt mask bit of source buffer empty
0 = Unmask
1 = Mask
R/W 0x1
mask_tbuf_
full_int [3] Interrupt mask bit of target buffer full
0 = Unmask
1 = Mask
R/W 0x1
mask_atadev_
irq_int [2] Interrupt mask bit of ATA device interrupt request
0 = Unmask
1 = Mask
R/W 0x1
reserved [1] Reserved R/W 0x1
mask_xfr_
done_int [0] Interrupt mask bit of XFR done
0 = Unmask
1 = Mask
R/W 0x1
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-20
2.13 ATA_CFG REGISTER
Register Address R/W Description Reset Value
ATA_CFG 0x4B801918 R/W ATA Configuration register 0x0000_0000
ATA_CFG Bits Description R/W Reset Value
Reserved [31:9] Reserved bits R 0x0
sbuf_empty_
mode [8] Determines whether to continue automatically when
source buffer is empty. This bit should not be changed
during runtime operation.
0 = Continue automatically with new source buffer
address.
1 = Stay in pause state and wait for CPU’s action.
** With the sbuf_empty mode is "0" and the transmission
data size is bigger than the source buffer size, the source
buffer empty interrupt(sbuf_empty_int) happens before
setting of the second source buffer base address and size.
Then ATA host controller brings data from the first source
buffer repeatedly. To avoid this, after 1st source buffer is
empty, the “sbuf_empty_mode” bit automatically goes to
HIGH even though the default is “0”. So user must make a
command “CONTINUE”. And then user don’t want that the
CPU dose not interfere the change of the next source
buffer address, set “0” at the bit 8 before/after the next
base address and size.
R/W 0x0
tbuf_full_mode [7] Determines whether to continue automatically when track
buffer is full. This bit should not be changed during runtime
operation.
0 = Continue automatically with new track buffer address.
1 = Stay in pause state and wait for CPU’s action.
** With the tbuf_full mode is "0" and the transmission data
size is bigger than the target buffer size, the target buffer
full interrupt(tbuf_full_int) happens before setting of the
second target buffer base address and size. Then ATA
host controller sends data to the first target buffer
repeatedly. To avoid this, after 1st target buffer is full, the
“tbuf_buf_mode” bit automatically goes to HIGH even
though the default is “0”. So user must make a command
“CONTINUE”. And then user don’t want that the CPU dose
not interfere the change of the next target buffer address,
set “0” at the bit 8 before/after the next base address and
size.
R/W 0x0
byte_swap [6] Determines whether data endian is little or big in 16bit
data.
0 = Little endian ( data[15:8], data[7:0] )
1 = Big endian ( data[7:0], data[15:8] )
R/W 0x0
atadev_irq_al [5] Device interrupt signal level
0 = Active high
R/W 0x0
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-21
ATA_CFG Bits Description R/W Reset Value
1 = Active low
dma_dir [4] DMA transfer direction
0 = Host read data from device
1 = Host write data to device
R/W 0x0
ata_class [3:2] ATA transfer class select
0 = Transfer class is PIO
1 = Transfer class is PIO DMA
2,3 = Reserved
R/W 0x0
ata_iordy_en [1] Determines whether IORDY input can extend data
transfer.
0 = IORDY disable( ignored )
1 = IORDY enable ( can extend )
R/W 0x0
ata_rst [0] ATA device reset by this host.
0 = No reset
1 = Reset
R/W 0x0
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-22
2.14 ATA_PIO_TIME REGISTER
Register Address R/W Description Reset Value
ATA_PIO_TIME 0x4B80192C R/W ATA PIO Timing Control register 0x0001_C23
8
ATA_PIO_TIME Bits Description R/W Reset Value
Reserved [31:20] Reserved bits R 0x0
pio_teoc [19:12] PIO timing parameter, teoc, end of cycle time
It shall not have zero value.
teoc = HCLK time * (pio_teoc + 1)
R/W 0x1C
pio_t2 [11:4] PIO timing parameter, t2, DIOR/Wn pulse width
It shall not have zero value.
t2 = HCLK time * (pio_t2 + 1)
R/W 0x23
pio_t1 [3:0] PIO timing parameter, t1, address valid to DIOR/Wn
t1 = HCLK time * (pio_t1 + 1)
R/W 0x8
2.15 ATA_XFR_NUM REGISTER
Register Address R/W Description Reset Value
ATA_XFR_NUM 0x4B801934 R/W ATA Data Transfer Number register 0x0000_0000
ATA_XFR_NUM Bits Description R/W Reset Value
xfr_num [31:1] Data transfer number. R/W 0x00000000
Reserved [0] Reserved bits R 0x0
2.16 ATA_XFR_CNT REGISTER
Register Address R/W Description Reset Value
ATA_XFR_CNT 0x4B801938 R/W ATA Data Transfer Counter register 0x0000_0000
ATA_XFR_CNT Bits Description R/W Reset Value
xfr_cnt [31:1] Current remaining transfer counter. This value counts
down from ATA_XFR_NUM. It goes to zero when pre-
defined all data has been transferred.
R/W 0x00000000
Reserved [0] Reserved bits R 0x0
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-23
2.17 ATA_TBUF_START REGISTER
Register Address R/W Description Reset Value
ATA_TBUF_
START 0x4B80193C R/W Start address of track buffer 0x0000_0000
ATA_TBUF_
START Bits Description R/W Reset Value
track_buffer_
start [31:2] Start address of track buffer (4byte unit) R/W 0x00000000
Reserved [1:0] Reserved bits R 0x0
2.18 ATA_TBUF_SIZE REGISTER
Register Address R/W Description Reset Value
ATA_TBUF_
SIZE 0x4B801940 R/W Size of track buffer 0x0000_0000
ATA_TBUF_
SIZE Bits Description R/W Reset Value
track_buffer_
size [31:5] Size of track buffer (32byte unit)
This should be set to “size_of_data_in_bytes − 1”. For
example, to transfer 1-sector (512-byte, 32’h200), user
should set 32’h1FF ( = 32’h200 – 1).
R/W 0x0000000
Reserved [4:0] Reserved bits R 0x00
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-24
2.19 ATA_SBUF_START REGISTER
Register Address R/W Description Reset Value
ATA_SBUF_
START 0x4B801944 R/W Start address of source buffer 0x0000_0000
ATA_SBUF_
START Bits Description R/W Reset Value
src_buffer_start [31:2] Start address of source buffer (4byte unit) R/W 0x00000000
Reserved [1:0] Reserved bits R 0x0
2.20 ATA_SBUF_SIZE REGISTER
Register Address R/W Description Reset Value
ATA_SBUF_
SIZE 0x4B801948 R/W Size of source buffer 0x0000_0000
ATA_SBUF_
SIZE Bits Description R/W Reset Value
src_buffer_
size [31:5] Size of source buffer (32byte unit)
This should be set to “size_of_data_in_bytes – 1”. For
example, to transfer 1-sector (512-byte, 32’h200), user
should set 32’h1FF ( = 32’h200 – 1).
R/W 0x0000000
Reserved [4:0] Reserved bits R 0x00
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-25
2.21 ATA_CADDR_TBUF REGISTER
Register Address R/W Description Reset Value
ATA_CADDR_
TBUF 0x4B80194C R/W Current address of track buffer 0x0000_0000
ATA_CADDR_
TBUF Bits Description R/W Reset Value
track_buf_
cur_adr [31:2] Current address of track buffer R/W 0x00000000
Reserved [1:0] Reserved bits R 0x0
2.22 ATA_CADDR_SBUF REGISTER
Register Address R/W Description Reset Value
ATA_CADDR_
SBUF 0x4B801950 R/W Current address of source buffer 0x0000_0000
ATA_CADDR_
SBUF Bits Description R/W Reset Value
src_buf_cur_
adr [31:2] Current address of source buffer R/W 0x00000000
Reserved [1:0] Reserved bits R 0x0
2.23 ATA_PIO_DTR REGISTER
Register Address R/W Description Reset Value
ATA_PIO_DTR 0x4B801954 W 16bit PIO data register 0x0000_0000
ATA_PIO_DTR Bits Description R/W Reset Value
Reserved [31:16] Reserved bits R 0x0
pio_dev_dtr* [15:0] 16-bit PIO data register W 0x0000
NOTE: pio_dev_dtr can be read by accessing register ATA_PIO_RDATA
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-26
2.24 ATA_PIO_FED REGISTER
Register Address R/W Description Reset Value
ATA_PIO_FED 0x4B801958 W 8bit PIO device feature/error register 0x0000_0000
ATA_PIO_FED Bits Description R/W Reset Value
Reserved [31:8] Reserved bits R 0x0
pio_dev_fed [7:0] 8-bit PIO device feature/error (command block) register W 0x00
NOTE: pio_dev_fed can be read by accessing register ATA_PIO_RDATA
2.25 ATA_PIO_SCR REGISTER
Register Address R/W Description Reset Value
ATA_PIO_SCR 0x4B80195C W 8-bit PIO device sector count register 0x0000_0000
ATA_PIO_SCR Bits Description R/W Reset Value
Reserved [31:8] Reserved bits R 0x0
pio_dev_scr [7:0] 8-bit PIO device sector count (command block) register W 0x00
NOTE: pio_dev_scr can be read by accessing register ATA_PIO_RDATA
2.26 ATA_PIO_LLR REGISTER
Register Address R/W Description Reset Value
ATA_PIO_LLR 0x4B801960 W 8-bit PIO device LBA low register 0x0000_0000
ATA_PIO_LLR Bits Description R/W Reset Value
Reserved [31:8] Reserved bits R 0x0
pio_dev_llr [7:0] 8-bit PIO device LBA low (command block) register W 0x00
NOTE: pio_dev_llr can be read by accessing register ATA_PIO_RDATA
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-27
2.27 ATA_PIO_LMR REGISTER
Register Address R/W Description Reset Value
ATA_PIO_LMR 0x4B801964 W 8-bit PIO device LBA middle register 0x0000_0000
ATA_PIO_LMR Bits Description R/W Reset Value
Reserved [31:8] Reserved bits R 0x0
pio_dev_lmr [7:0] 8-bit PIO device LBA middle (command block) register W 0x00
NOTE: pio_dev_lmr can be read by accessing register ATA_PIO_RDATA
2.28 ATA_PIO_LMR REGISTER
Register Address R/W Description Reset Value
ATA_PIO_LHR 0x4B801968 W 8-bit PIO device LBA high register 0x0000_0000
ATA_PIO_LHR Bits Description R/W Reset Value
Reserved [31:8] Reserved bits R 0x0
pio_dev_lhr [7:0] 8-bit PIO LBA high (command block) register W 0x00
NOTE: pio_dev_lhr can be read by accessing register ATA_PIO_RDATA
2.29 ATA_PIO_DVR REGISTER
Register Address R/W Description Reset Value
ATA_PIO_DVR 0x4B80196C W 8-bit PIO device register 0x0000_0000
ATA_PIO_DVR Bits Description R/W Reset Value
Reserved [31:8] Reserved bits R 0x0
pio_dev_dvr [7:0] 8-bit PIO device (command block) register W 0x00
NOTE: pio_dev_dvr can be read by accessing register ATA_PIO_RDATA
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-28
2.30 ATA_PIO_CSD REGISTER
Register Address R/W Description Reset Value
ATA_PIO_CSD 0x4B801970 W 8-bit PIO device command/status register 0x0000_0000
ATA_PIO_CSD Bits Description R/W Reset Value
Reserved [31:8] Reserved bits R 0x0
pio_dev_csd [7:0] 8-bit PIO device command/status (command block)
register W 0x00
NOTE: pio_dev_csd can be read by accessing register ATA_PIO_RDATA
2.31 ATA_PIO_DAD REGISTER
Register Address R/W Description Reset Value
ATA_PIO_DAD 0x4B801974 W 8-bit PIO device control/alternate status register 0x0000_0000
ATA_PIO_DAD Bits Description R/W Reset Value
Reserved [31:8] Reserved bits R 0x0
pio_dev_dad [7:0] 8-bit PIO device control/alternate status (control block)
register W 0x00
NOTE: pio_dev_dad can be read by accessing register ATA_PIO_RDATA
2.32 ATA_PIO_RDATA REGISTER
Register Address R/W Description Reset Value
ATA_PIO_
RDATA 0x4B80197C R PIO read data register 0x0000_0000
ATA_PIO_
RDATA Bits Description R/W Reset Value
Reserved [31:16] Reserved bits R 0x0
pio_rdata [15:0] PIO read data register while HOST read from ATA device
register R 0x0000
S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-29
2.33 BUS_FIFO_STATUS REGISTER
Register Address R/W Description Reset Value
BUS_FIFO_
STATUS 0x4B801990 R BUS FIFO status register 0x0000_0000
BUS_FIFO_
STATUS Bits Description R/W Reset Value
Reserved [31:19] Reserved bits R 0x0
bus_state[2:0] [18:16] 3’b000 : IDLE
Another value is in operation.
R 0x00
Reserved [15:14] Reserved bits R 0x0
bus_fifo_rdpnt [13:8] bus fifo read pointer R 0x00
Reserved [7:6] Reserved bits R 0x0
bus_fifo_wrpnt [5:0] bus fifo write pointer R 0x00
2.34 ATA_FIFO_STATUS REGISTER
Register Address R/W Description Reset Value
ATA_FIFO_
STATUS 0x4B801994 R ATA FIFO status register 0x0000_0000
ATA_FIFO_
STATUS Bits Description R/W Reset Value
Reserved [31] Reserved bit R 0x0
ata_state [30:28] PIO read data register while HOST read from ATA device
register R 0x0000
pio_state [27:26] 2’b00 = IDLE 2’’b01 = T1
2’b10 = T2 2’b11 = TEOC
R 0x0
pdma_state [25:24] 2’b00 = IDLE 2’b01 = T1
2’b10 = T2 2’b11 = TEOC
R 0x0
Reserved [23:0] Reserved bits R 0x0
CF CONTROLLER S3C2450X RISC MICROPROCESSOR
8-30
NOTES
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-1
9 DMA CONTROLLER
1 OVERVIEW
S3C2450 supports eight-channel DMA (Bridge DMA or peripheral DMA) controller that is located between the
system bus and the peripheral bus. Each channel of DMA controller can perform data movements between
devices in the system bus and/or peripheral bus with no restrictions. In other words, each channel can handle the
following four cases: 1) both source and destination are in the system bus, 2) source is in the system bus while
destination is in the peripheral bus, 3) source is in the peripheral bus while destination is in the system bus, 4)
both source and destination are in the peripheral bus.
The main advantage of DMA is that it can transfer the data without CPU intervention. The operation of DMA can
be initiated by S/W, or the request from internal peripherals, or the external request pins.
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-2
2 DMA REQUEST SOURCES
Each channel of DMA controller can select one source among 27 DMA sources if H/W DMA request mode is
selected by REQSEL register. (Note that if S/W request mode is selected, this DMA request sources have no
meaning at all.) The 27 DMA sources for each channel are as follows.
Table 9-1. DMA request sources for each channel
Bit Source Bit Source Bit Source Bit Source
0 SPI_0_TX 8 Reserved 16 Reserved 24 UART_2[1]
1 SPI_0_RX 9 PWM Timer 17 nXDREQ0 25 UART_3[0]
2 SPI_1_TX 10 Reserved 18 nXDREQ1 26 UART_3[1]
3 SPI_1_RX 11 Reserved 19 UART_0[0] 27 PCMOUT
4 I2S TX 12 PCM0 TX 20 UART_0[1] 28 PCMIN
5 I2S RX 13 PCM0 RX 21 UART_1[0] 29 MICIN
6 I2S1 TX 14 PCM1 TX 22 UART_1[1] 30 Reserved
7 I2S1 RX 15 PCM1 RX 23 UART_2[0] 31 Reserved
Here, nXDREQ0 and nXDREQ1 represent two external sources (External Devices).
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-3
3 DMA OPERATION
The details of DMA operation can be explained using three-state FSM (finite state machine) as follows:
State-1. As an initial state, it waits for the DMA request. If it comes, go to state-2. At this state, DMA ACK
and INT REQ are 0.
State-2. In this state, DMA ACK becomes 1 and the counter (CURR_TC) is loaded from DCON[19:0]
register. Note that DMA ACK becomes 1 and remains 1 until it is cleared later.
State-3. In this state, sub-FSM handling the atomic operation of DMA is initiated. The sub-FSM reads the
data from the source address and then writes it to destination address. In this operation, data size
and transfer size (single or burst) are considered. This operation is repeated until the counter
(CURR_TC) becomes 0 in the whole service mode, while performed only once in a single service
mode. The main FSM (this FSM) counts down the CURR_TC when the sub-FSM finishes each of
atomic operation. In addition, this main FSM asserts the INT REQ signal when CURR_TC
becomes 0 and the interrupt setting of DCON [29] register is set to 1. In addition, it clears DMA
ACK if one of the following conditions is met.
1) CURR_TC becomes 0 in the whole service mode
2) atomic operation finishes in the single service mode.
Note that in the single service mode, these three states of main FSM are performed and then stops, and wait for
another DMA REQ. And if DMA REQ comes in all three states are repeated. Therefore, DMA ACK is asserted
and then de-asserted for each atomic transfer. In contrast, in the whole service mode, main FSM waits at state-3
until CURR_TC becomes 0. Therefore, DMA ACK is asserted during all the transfers and then de-asserted when
TC reaches 0.
However, INT REQ is asserted only if CURR_TC becomes 0 regardless of the service mode (single service mode
or whole service mode).
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-4
3.1 EXTERNAL DMA DREQ/DACK PROTOCOL
There are four types of external DMA request/acknowledge protocols. Each type defines how the signals like
DMA request and acknowledge are related to these protocols.
3.1.1 Basic DMA Timing
The DMA service means paired Reads and Writes cycles during DMA operation, which is one DMA operation.
The Figure 9-1 shows the basic Timing in the DMA operation of the S3C2450.
• The setup time and the delay time of XnXDREQ and XnXDACK are same in all the modes.
• If the completion of XnXDREQ meets its setup time, it is synchronized twice and then XnXDACK is asserted.
• After assertion of XnXDACK, DMA requests the bus and if it gets the bus it performs its operations. XnXDACK
is deasserted when DMA operation finishes.
XSCLK
9.3ns Setup
9.3ns Setup
6.8ns Delay
6.6ns Delay
Read Write
Min. 2MCLK
XnXDREQ
XnXDACK
Min. 3MCLK
Figure 9-1. Basic DMA Timing Diagram
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-5
Demand/Handshake Mode Comparison − Related to the Protocol between XnXDREQ and XnXDACK
These are two different modes related to the protocol between XnXDREQ and XnXDACK. Figure 9-2 shows the
differences between these two modes i.e., Demand and Handshake modes.
At the end of one transfer (Single/Burst transfer), DMA checks the state of double-synched XnXDREQ.
3.1.2 Demand mode
• If XnXDREQ remains asserted, the next transfer starts immediately. Otherwise it waits for XnXDREQ to be
asserted.
3.1.3 Handshake mode
• If XnXDREQ is deasserted, DMA deasserts XnXDACK in 2cycles. Otherwise it waits until XnXDREQ is
deasserted.
Caution: XnXDREQ has to be asserted (low) only after the deassertion (high) of XnXDACK.
Demand Mode
XSCLK
XnXDACK
XnXDACK
XnXDREQ
XnXDREQ
2cycles
Double
synch
Handshake Mode
BUS Acquisiton
1st Transfer 2nd Transfer
2cycles Double
synch 2cycles
Actual Transfer
Read Write
Read Write
Read Write
Figure 9-2. Demand/Handshake Mode Comparison
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-6
3.1.4 Transfer Size
• There are two different transfer sizes; single and Burst 4.
• DMA holds the bus firmly during the transfer of these chunk of data, thus other bus masters can not get the
bus.
3.1.5 Burst 4 Transfer Size
4 sequential Reads and 4 sequential Writes are performed in the Burst 4 Transfer.
NOTE
Single Transfer size: One read and one write are performed.
XSCLK
XnXDREQ
XnXDACK
Read Read Read Write Write WriteRead Write
3 cycles
Double
synch
Figure 9-3. Burst 4 Transfer size
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-7
3.2 EXAMPLES OF POSSIBLE CASES
3.2.1 Single service, Demand Mode, Single Transfer Size
The assertion of XnXDREQ is need for every unit transfer (Single service mode), the operation continues while
the XnXDREQ is asserted(Demand mode), and one pair of Read and Write(Single transfer size) is performed.
XnXDREQ
XnXDACK
XSCLK
XnXDREQ
XnXDACK
Double
synch Read Write Read Write
Figure 9-4. Single service, Demand Mode, Single Transfer Size
Single service/Handshake Mode, Single Transfer Size
XnXDREQ
XnXDACK
XSCLK
Read Write Read Write
2cycles
Double
synch
Figure 9-5. Single service, Handshake Mode, Single Transfer Size
Whole service/Handshake Mode, Single Transfer Size
XSCLK
XnXDREQ
XnXDACK
Read Write Read Write Read Write
2cycles 2cycles3 cycles
Double
synch
Figure 9-6. Whole service, Handshake Mode, Single Transfer Size
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-8
4 DMA SPECIAL REGISTERS
There are 10 control registers for each DMA channel. (Since there are six channels, the total number of control
registers is 60.) Seven of them are to control the DMA transfer, and other three are to see the status of DMA
controller. The details of those registers are as follows.
4.1 DMA INITIAL SOURCE REGISTER (DISRC)
Register Address R/W Description Reset Value
DISRC0 0x4B000000 R/W DMA0 Initial Source Register 0x00000000
DISRC1 0x4B000100 R/W DMA1 Initial Source Register 0x00000000
DISRC2 0x4B000200 R/W DMA2 Initial Source Register 0x00000000
DISRC3 0x4B000300 R/W DMA3 Initial Source Register 0x00000000
DISRC4 0x4B000400 R/W DMA4 Initial Source Register 0x00000000
DISRC5 0x4B000500 R/W DMA5 Initial Source Register 0x00000000
DISRC6 0x4B000600 R/W DMA6 Initial Source Register 0x00000000
DISRC7 0x4B000700 R/W DMA7 Initial Source Register 0x00000000
DISRCn Bit Description Initial State
S_ADDR [30:0] These bits are the base address (start address) of source data to
transfer. This value will be loaded into CURR_SRC only if the
CURR_SRC is 0 and the DMA ACK is 1.
0x00000000
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-9
4.2 DMA INITIAL SOURCE CONTROL REGISTER (DISRCC)
Register Address R/W Description Reset Value
DISRCC0 0x4B000004 R/W DMA0 Initial Source Control Register 0x00000000
DISRCC1 0x4B000104 R/W DMA1 Initial Source Control Register 0x00000000
DISRCC2 0x4B000204 R/W DMA2 Initial Source Control Register 0x00000000
DISRCC3 0x4B000304 R/W DMA3 Initial Source Control Register 0x00000000
DISRCC4 0x4B000404 R/W DMA4 Initial Source Control Register 0x00000000
DISRCC5 0x4B000504 R/W DMA5 Initial Source Control Register 0x00000000
DISRCC6 0x4B000604 R/W DMA6 Initial Source Control Register 0x00000000
DISRCC7 0x4B000704 R/W DMA7 Initial Source Control Register 0x00000000
DISRCn Bit Description Initial State
LOC [1] Bit 1 is used to select the location of source.
0 = The source is in the system bus (AHB),
1 = The source is in the peripheral bus (APB)
0
INC [0] Bit 0 is used to select the address increment.
0 = Increment
1 = Fixed
If it is 0, the address is increased by its data size after each transfer
in burst and single transfer mode.
If it is 1, the address is not changed after the transfer (In the burst
mode, address is increased during the burst transfer, but the
address is recovered to its first value after the transfer).
0
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-10
4.3 DMA INITIAL DESTINATION REGISTER (DIDST)
Register Address R/W Description Reset Value
DIDST0 0x4B000008 R/W DMA0 Initial Destination Register 0x00000000
DIDST1 0x4B000108 R/W DMA1 Initial Destination Register 0x00000000
DIDST2 0x4B000208 R/W DMA2 Initial Destination Register 0x00000000
DIDST3 0x4B000308 R/W DMA3 Initial Destination Register 0x00000000
DIDST4 0x4B000408 R/W DMA4 Initial Destination Register 0x00000000
DIDST5 0x4B000508 R/W DMA5 Initial Destination Register 0x00000000
DIDST6 0x4B000608 R/W DMA6 Initial Destination Register 0x00000000
DIDST7 0x4B000708 R/W DMA7 Initial Destination Register 0x00000000
DIDSTn Bit Description Initial State
D_ADDR [30:0] These bits are the base address (start address) of destination for
the transfer. This value will be loaded into CURR_SRC only if the
CURR_SRC is 0 and the DMA ACK is 1.
0x00000000
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-11
4.4 DMA INITIAL DESTINATION CONTROL REGISTER (DIDSTC)
Register Address R/W Description Reset Value
DIDSTC0 0x4B00000C R/W DMA0 Initial Destination Control Register 0x00000000
DIDSTC1 0x4B00010C R/W DMA1 Initial Destination Control Register 0x00000000
DIDSTC2 0x4B00020C R/W DMA2 Initial Destination Control Register 0x00000000
DIDSTC3 0x4B00030C R/W DMA3 Initial Destination Control Register 0x00000000
DIDSTC4 0x4B00040C R/W DMA4 Initial Destination Control Register 0x00000000
DIDSTC5 0x4B00050C R/W DMA5 Initial Destination Control Register 0x00000000
DIDSTC6 0x4B00060C R/W DMA6 Initial Destination Control Register 0x00000000
DIDSTC7 0x4B00070C R/W DMA7 Initial Destination Control Register 0x00000000
DIDSTn Bit Description Initial State
CHK_INT [2] Select interrupt occurrence time when auto reload is setting
0 = Interrupt will occur when TC reaches 0.
1 = Interrupt will occur after auto-reload is performed
0
LOC [1] Bit 1 is used to select the location of destination.
0 = The destination is in the system bus (AHB).
1 = The destination is in the peripheral bus (APB).
0
INC [0] Bit 0 is used to select the address increment.
0 = Increment
1 = Fixed
If it is 0, the address is increased by its data size after each transfer
in burst and single transfer mode.
If it is 1, the address is not changed after the transfer (In the burst
mode, address is increased during the burst transfer, but the
address is recovered to its first value after the transfer).
0
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-12
4.5 DMA CONTROL REGISTER (DCON)
Register Address R/W Description Reset Value
DCON0 0x4B000010 R/W DMA0 Control Register 0x00000000
DCON1 0x4B000110 R/W DMA1 Control Register 0x00000000
DCON2 0x4B000210 R/W DMA2 Control Register 0x00000000
DCON3 0x4B000310 R/W DMA3 Control Register 0x00000000
DCON4 0x4B000410 R/W DMA4 Control Register 0x00000000
DCON5 0x4B000510 R/W DMA5 Control Register 0x00000000
DCON6 0x4B000610 R/W DMA6 Control Register 0x00000000
DCON7 0x4B000710 R/W DMA7 Control Register 0x00000000
DCONn Bit Description Initial State
DMD_HS [31] Select one between demand mode and handshake mode.
0 = demand mode is selected
1 = handshake mode is selected.
In both modes, DMA controller starts its transfer and asserts DACK
for a given asserted DREQ. The difference between two modes is
whether it waits for the de-asserted DACK or not. In handshake
mode, DMA controller waits for the de-asserted DREQ before
starting a new transfer. If it sees the de-asserted DREQ, it de-
asserts DACK and waits for another asserted DREQ. In contrast, in
the demand mode, DMA controller does not wait until the DREQ is
de-asserted. It just de-asserts DACK and then starts another
transfer if DREQ is asserted. We recommend using handshake
mode for external DMA request sources to prevent unintended
starts of new transfers.
0
SYNC [30] Select DREQ/DACK synchronization.
0 = DREQ and DACK are synchronized to PCLK (APB clock).
1 = DREQ and DACK are synchronized to HCLK (AHB clock).
Therefore, devices attached to AHB system bus, this bit has to be
set to 1, while those attached to APB system, it should be set to 0.
For the devices attached to external system, user should select this
bit depending on whether the external system is synchronized with
AHB system or APB system.
0
INT [29] Enable/Disable the interrupt setting for CURR_TC(terminal count)
0 = CURR_TC interrupt is disabled. User has to look the transfer
count in the status register. (i.e., polling)
1 = Interrupt request is generated when all the transfer is done (i.e.,
CURR_TC becomes 0).
0
TSZ [28] Select the transfer size of an atomic transfer (i.e., transfer
performed at each time DMA owns the bus before releasing the
bus).
0 = A unit transfer is performed.
1 = A burst transfer of length four is performed.
0
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-13
DCONn Bit Description Initial State
SERVMODE [27] Select the service mode between single service mode and whole
service mode.
0 = Single service mode is selected in which after each atomic
transfer (single or burst of length four) DMA stops and waits for
another DMA request.
1 = Whole service mode is selected in which one request gets
atomic transfers to be repeated until the transfer count reaches to
0. In this mode, additional request is not required. Here, note that
even in the whole service mode, DMA releases the bus after each
atomic transfer and then tries to re-get the bus to prevent starving
of other bus masters.
0
Reserved [26:2
5] Reserved for future use 00
PADDRFIX [24] APB Address fix control
0 = Increment
1 = Fix
If you want to fix the APB address during burst operation, set this bit
to 1.
0
Reserved [23] Reserved for future use 0
RELOAD [22] Set the reload on/off option.
0 = Auto reload is performed when a current value of transfer count
becomes 0 (i.e., all the required transfers are performed).
1 = DMA channel (DMA REQ) is turned off when a current value of
transfer count becomes 0. The channel on/off bit(DMASKTRIGn[1])
is set to 0(DREQ off) to prevent unintended further start of new
DMA operation
0
DSZ [21:2
0] Data size to be transferred.
00 = Byte
01 = Half word
10 = Word
11 = Reserved
00
TC [19:0] Initial transfer count (or transfer beat).
Note that the actual number of bytes that are transferred is
computed by the following equation: DSZ x TSZ x TC, where DSZ,
TSZ, and TC represent data size (DCONn[21:20]), transfer size
(DCONn[28]), and initial transfer count, respectively.
This value will be loaded into CURR_TC only if the CURR_TC is 0
and the DMA ACK is 1.
00000
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-14
4.6 DMA STATUS REGISTER (DSTAT)
Register Address R/W Description Reset Value
DSTAT0 0x4B000014 R DMA0 Count Register 000000h
DSTAT1 0x4B000114 R DMA1 Count Register 000000h
DSTAT2 0x4B000214 R DMA2 Count Register 000000h
DSTAT3 0x4B000314 R DMA3 Count Register 000000h
DSTAT4 0x4B000414 R DMA4 Count Register 000000h
DSTAT5 0x4B000514 R DMA5 Count Register 000000h
DSTAT6 0x4B000614 R DMA6 Count Register 000000h
DSTAT7 0x4B000714 R DMA7 Count Register 000000h
DSTATn Bit Description Initial State
STAT [21:20] Status of this DMA controller.
00 = It indicates that DMA controller is ready for another DMA
request.
01 = It indicates that DMA controller is busy for transfers.
00b
CURR_TC [19:0] Current value of transfer count.
Note that transfer count is initially set to the value of DCONn[19:0]
register and decreased by one at the end of every atomic transfer.
00000h
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-15
4.7 DMA CURRENT SOURCE REGISTER (DCSRC)
Register Address R/W Description Reset Value
DCSRC0 0x4B000018 R DMA0 Current Source Register 0x00000000
DCSRC1 0x4B000118 R DMA1 Current Source Register 0x00000000
DCSRC2 0x4B000218 R DMA2 Current Source Register 0x00000000
DCSRC3 0x4B000318 R DMA3 Current Source Register 0x00000000
DCSRC4 0x4B000418 R DMA4 Current Source Register 0x00000000
DCSRC5 0x4B000518 R DMA5 Current Source Register 0x00000000
DCSRC6 0x4B000618 R DMA6 Current Source Register 0x00000000
DCSRC7 0x4B000718 R DMA7 Current Source Register 0x00000000
DCSRCn Bit Description Initial State
CURR_SRC [30:0] Current source address for DMAn. 0x00000000
4.8 CURRENT DESTINATION REGISTER (DCDST)
Register Address R/W Description Reset Value
DCDST0 0x4B00001C R DMA0 Current Destination Register 0x00000000
DCDST1 0x4B00011C R DMA1 Current Destination Register 0x00000000
DCDST2 0x4B00021C R DMA2 Current Destination Register 0x00000000
DCDST3 0x4B00031C R DMA3 Current Destination Register 0x00000000
DCDST4 0x4B00041C R DMA4 Current Destination Register 0x00000000
DCDST5 0x4B00051C R DMA5 Current Destination Register 0x00000000
DCDST6 0x4B00061C R DMA6 Current Destination Register 0x00000000
DCDST7 0x4B00071C R DMA7 Current Destination Register 0x00000000
DCDSTn Bit Description Initial State
CURR_DST [30:0] Current destination address for DMAn. 0x00000000
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-16
4.9 DMA MASK TRIGGER REGISTER (DMASKTRIG)
Register Address R/W Description Reset Value
DMASKTRIG0 0x4B000020 R/W DMA0 Mask Trigger Register 000
DMASKTRIG1 0x4B000120 R/W DMA1 Mask Trigger Register 000
DMASKTRIG2 0x4B000220 R/W DMA2 Mask Trigger Register 000
DMASKTRIG3 0x4B000320 R/W DMA3 Mask Trigger Register 000
DMASKTRIG4 0x4B000420 R/W DMA4 Mask Trigger Register 000
DMASKTRIG5 0x4B000520 R/W DMA5 Mask Trigger Register 000
DMASKTRIG6 0x4B000620 R/W DMA6 Mask Trigger Register 000
DMASKTRIG7 0x4B000720 R/W DMA7 Mask Trigger Register 000
DMASKTRIGn Bit Description Initial State
STOP [2] Stop the DMA operation.
1 = DMA stops as soon as the current atomic transfer ends. If there
is no current running atomic transfer, DMA stops immediately. The
CURR_TC, CURR_SRC, CURR_DST will be 0.
Note: Due to possible current atomic transfer, “stop” may take several
cycles. The finish of “stopping” operation (i.e., actual stop time) can be
detected by waiting until the channel on/off bit (DMASKTRIGn[1]) is set to
off. This stop is “actual stop”.
0
ON_OFF [1] DMA channel on/off bit.
0 = DMA channel is turned off. (DMA request to this channel is
ignored.)
1 = DMA channel is turned on and the DMA request is handled.
This bit is automatically set to off if we set the DCONn[22] bit to “no
auto reload” and/or STOP bit of DMASKTRIGn to “stop”.
Note that when DCON [22] bit is "no auto reload", this bit becomes
0 when CURR_TC reaches 0. If the STOP bit is 1, this bit becomes
0 as soon as the current atomic transfer finishes.
Note: This bit should not be changed manually during DMA operations
(i.e., this has to be changed only by using DCON [22] or STOP bit.)
0
SW_TRIG [0] Trigger the DMA channel in S/W request mode.
1 = it requests a DMA operation to this controller.
However, note that for this trigger to have effects S/W request
mode has to be selected (DCONn[23]) and channel ON_OFF bit
has to be set to 1 (channel on). When DMA operation starts, this bit
is cleared automatically.
0
NOTE: You can freely change the values of DISRC register, DIDST registers, and TC field of DCON register. Those changes
take effect only after the finish of current transfer (i.e., when CURR_TC becomes 0). On the other hand, any change
made to other registers and/or fields takes immediate effect. Therefore, be careful in changing those registers and
fields.
S3C2450X RISC MICROPROCESSOR DMA CONTROLLER
9-17
4.10 DMA REQUESET SELECTION REGISTER (DMAREQSEL)
Register Address R/W Description Reset Value
DMAREQSEL0 0x4B000024 R/W DMA0 Request Selection Register 000
DMAREQSEL1 0x4B000124 R/W DMA1 Request Selection Register 000
DMAREQSEL2 0x4B000224 R/W DMA2 Request Selection Register 000
DMAREQSEL3 0x4B000324 R/W DMA3 Request Selection Register 000
DMAREQSEL4 0x4B000424 R/W DMA4 Request Selection Register 000
DMAREQSEL5 0x4B000524 R/W DMA5 Request Selection Register 000
DMAREQSEL6 0x4B000624 R/W DMA6 Request Selection Register 000
DMAREQSEL7 0x4B000724 R/W DMA7 Request Selection Register 000
DMAREQSELn Bit Description Initial State
HWSRCSEL [5:1] Select DMA request source for each DMA.
→ Refer to the Table 11-1 on page 11-2.
This bits control the 8-1 MUX to select the DMA request source of
each DMA. These bits have meanings if and only if H/W request
mode is selected by DMAREQSELn[0].
00000
SWHW_SEL [0] Select the DMA source between software (S/W request mode) and
hardware (H/W request mode).
0 = S/W request mode is selected and DMA is triggered by setting
SW_TRIG bit of DMASKTRIG control register.
1 = DMA source selected by bit [5:1] is used to trigger the DMA
operation.
0
DMA CONTROLLER S3C2450X RISC MICROPROCESSOR
9-18
NOTES
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-1
10 INTERRUPT CONTROLLER
1 OVERVIEW
The interrupt controller in the S3C2450 receives the request from 59 interrupt sources. These interrupt sources
are provided by internal peripherals such as the DMA controller, the UART, IIC, and others. In these interrupt
sources, the UARTn and EINTn interrupts are 'OR'ed to the interrupt controller.
When receiving multiple interrupt requests from internal peripherals and external interrupt request pins, the
interrupt controller requests FIQ or IRQ interrupt of the ARM926EJ core after the arbitration procedure.
The arbitration procedure depends on the hardware priority logic and the result is written to the interrupt pending
register, which helps users notify which interrupt is generated out of various interrupt sources.
Request sources
(with sub -register)
Request sources
(without sub -register)
SRCPND
INTPND
IRQ
FIQ
SUBSRCPND SUBMASK MASK
MODE
Priority
Figure 10-1. Interrupt Process Diagram
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-2
The interrupt controller has two groups of interrupt sources, and first group has always higher priority than the
other group. Actually, we made this interrupt controller using by two interrupt controllers. The nRIQ of ARM926EJ
is connected with ‘AND’ of nIRQs of each interrupt controller. The nFIQ is just same.
Figure 10-2. Interrupt Group Multiplexing Diagram
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-3
1.1 INTERRUPT CONTROLLER OPERATION
1.1.1 F-bit and I-bit of Program Status Register (PSR)
If the F-bit of PSR in ARM926EJ CPU is set to 1, the CPU does not accept the Fast Interrupt Request (FIQ) from
the interrupt controller. Likewise, If I-bit of the PSR is set to 1, the CPU does not accept the Interrupt Request
(IRQ) from the interrupt controller. So, the interrupt controller can receive interrupts by clearing F-bit or I-bit of the
PSR to 0 and setting the corresponding bit of INTMSK to 0.
1.1.2 Interrupt Mode
The ARM926EJ has two types of Interrupt mode: FIQ or IRQ. All the interrupt sources determine which mode is
used at interrupt request.
1.1.3 Interrupt Pending Register
The S3C2450 has two interrupt pending resisters: source pending register (SRCPND) and interrupt pending
register (INTPND). These pending registers indicate whether or not an interrupt request is pending. When the
interrupt sources request interrupt service, the corresponding bits of SRCPND register are set to 1, and at the
same time, only one bit of the INTPND register is set to 1 automatically after arbitration procedure. If interrupts are
masked, the corresponding bits of the SRCPND register are set to 1. This does not cause the bit of INTPND
register changed. When a pending bit of the INTPND register is set, the interrupt service routine starts whenever
the I-flag or F-flag is cleared to 0. The SRCPND and INTPND registers can be read and written, so the service
routine must clear the pending condition by writing a 1 to the corresponding bit in the SRCPND register first and
then clear the pending condition in the INTPND registers by using the same method.
1.1.4 Interrupt Mask Register
This register indicates that an interrupt has been disabled if the corresponding mask bit is set to 1. If an interrupt
mask bit of INTMSK is 0, the interrupt will be serviced normally. If the corresponding mask bit is 1 and the
interrupt is generated, the source pending bit will be set.
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-4
1.2 INTERRUPT SOURCES
The interrupt controller supports 51 interrupt sources as shown in the table below.
Sources Descriptions Arbiter Group
NONE Reserved ARB11
NONE Reserved ARB11
NONE Reserved ARB11
NONE Reserved ARB11
NONE Reserved ARB10
NONE Reserved ARB10
NONE Reserved ARB10
NONE Reserved ARB10
NONE Reserved ARB10
NONE Reserved ARB10
NONE Reserved ARB9
NONE Reserved ARB9
NONE Reserved ARB9
NONE Reserved ARB9
NONE Reserved ARB9
NONE Reserved ARB9
NONE Reserved ARB8
NONE Reserved ARB8
NONE Reserved ARB8
NONE Reserved ARB8
NONE Reserved ARB8
NONE Reserved ARB8
NONE Reserved ARB7
NONE Reserved ARB7
INT_I2S1 I2S1 interrupt ARB7
INT_I2S0 I2S0 interrupt ARB7
INT_PCM1 PCM1 interrupt ARB7
INT_PCM0 PCM0 interrupt ARB7
NONE Reserved ARB6
NONE Reserved ARB6
INT_IIC1 IIC1 interrupt ARB6
INT_2D 2D interrupt ARB6
INT_ADC ADC EOC and Touch interrupt (INT_ADC/INT_TC) ARB5
INT_RTC RTC alarm interrupt ARB5
INT_SPI1 High speed SPI 1 interrupt ARB5
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-5
Sources Descriptions Arbiter Group
INT_UART0 UART0 Interrupt (ERR, RXD, and TXD) ARB5
INT_IIC0 IIC 0 interrupt ARB4
INT_USBH USB Host interrupt ARB4
INT_USBD USB Device interrupt ARB4
INT_NAND NAND Flash Controller interrupt ARB4
INT_UART1 UART1 Interrupt (ERR, RXD, and TXD) ARB4
INT_SPI0 High speed SPI 0 interrupt ARB4
INT_SDI0 High Speed SDMMC 0 interrupt ARB3
INT_SDI1 High Speed SDMMC 1 interrupt ARB3
INT_CFCON CFCON interrupt ARB3
INT_UART3 UART3 Interrupt (ERR, RXD, and TXD) ARB3
INT_DMA DMA channel 8 interrupt(DMA0 ~ DMA7) ARB3
INT_LCD LCD interrupt(LCD Frame/FIFO/i80 interrupts) ARB3
INT_UART2 UART2 Interrupt (ERR, RXD, and TXD) ARB2
INT_TIMER4 Timer4 interrupt ARB2
INT_TIMER3 Timer3 interrupt ARB2
INT_TIMER2 Timer2 interrupt ARB2
INT_TIMER1 Timer1 interrupt ARB2
INT_TIMER0 Timer0 interrupt ARB2
INT_WDT_AC97 Watch-Dog / AC97 interrupt ARB1
INT_TICK RTC Time tick interrupt ARB1
nBATT_FLT Battery Fault interrupt ARB1
INT_CAM Camera Interface(INT_CAM_C, INT_CAM_P) ARB1
EINT8_23 External interrupt 8 – 23 ARB1
EINT4_7 External interrupt 4 – 7 ARB1
EINT3 External interrupt 3 ARB0
EINT2 External interrupt 2 ARB0
EINT1 External interrupt 1 ARB0
EINT0 External interrupt 0 ARB0
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-6
1.3 INTERRUPT PRIORITY GENERATING BLOCK
The priority logic for 32 interrupt requests is composed of seven rotation based arbiters: six first-level arbiters and
one second-level arbiter as shown in Figure 10-2 below.
Figure 10-3. Priority Generating Block
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-7
1.4 INTERRUPT PRIORITY
We have two groups of arbiters. One group is ARBITER0~ARBITER5, and the other is
ARMBITER6~ARBITER11. The former group has higher priority than the latter group. And priority of arbiters in
each group can be set as below separately.
Each arbiter can handle six interrupt requests based on the one bit arbiter mode control (ARB_MODE) and two
bits of selection control signals (ARB_SEL) as follows:
• If ARB_SEL bits are 00b, the priority order is REQ0, REQ1, REQ2, REQ3, REQ4, and REQ5.
• If ARB_SEL bits are 01b, the priority order is REQ0, REQ2, REQ3, REQ4, REQ1, and REQ5.
• If ARB_SEL bits are 10b, the priority order is REQ0, REQ3, REQ4, REQ1, REQ2, and REQ5.
• If ARB_SEL bits are 11b, the priority order is REQ0, REQ4, REQ1, REQ2, REQ3, and REQ5.
Note that REQ0 of an arbiter always has the highest priority, and REQ5 has the lowest one. In addition, by
changing the ARB_SEL bits, we can rotate the priority of REQ1 to REQ4.
Here, if ARB_MODE bit is set to 0, ARB_SEL bits are not automatically changed, making the arbiter to operate in
the fixed priority mode (note that even in this mode, we can reconfigure the priority by manually changing the
ARB_SEL bits). On the other hand, if ARB_MODE bit is 1, ARB_SEL bits are changed in rotation fashion, e.g., if
REQ1 is serviced, ARB_SEL bits are changed to 01b automatically so as to put REQ1 into the lowest priority. The
detailed rules of ARB_SEL change are as follows:
• If REQ0 or REQ5 is serviced, ARB_SEL bits are not changed at all.
• If REQ1 is serviced, ARB_SEL bits are changed to 01b.
• If REQ2 is serviced, ARB_SEL bits are changed to 10b.
• If REQ3 is serviced, ARB_SEL bits are changed to 11b.
• If REQ4 is serviced, ARB_SEL bits are changed to 00b.
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-8
2 INTERRUPT CONTROLLER SPECIAL REGISTERS
There are following control registers in the interrupt controller: source pending register, interrupt mode register,
mask register, priority register, interrupt pending register, interrupt offset register, sub-source pending register and
sub-mask register.
All the interrupt requests from the interrupt sources are first registered in the source pending register. They are
divided into two groups including Fast Interrupt Request (FIQ) and Interrupt Request (IRQ), based on the interrupt
mode register. The arbitration procedure for multiple IRQs is based on the priority register.
Overall Register Map
Register Address R/W Description Reset Value
SRCPND 1 0X4A000000 R/W Indicate the interrupt request status for group 1.
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
INTMOD 1 0X4A000004 R/W Interrupt mode regiseter for group 1.
0 = IRQ mode
1 = FIQ mode
0x00000000
INTMSK1 0X4A000008 R/W Determine which interrupt source of group 1is
masked. The masked interrupt source will not be
serviced.
0 = Interrupt service is available.
1 = Interrupt service is masked.
0xFFFFFFFF
0X4A00000C
INTPND1 0X4A000010 R/W Indicate the interrupt request status for group 1.
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
INTOFFSET1 0X4A000014 R Indicate the IRQ interrupt request source for group
1 0x00000000
SUBSRCPND 0X4A000018 R/W Indicate the interrupt request status.
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
INTSUBMSK 0X4A00001C R/W Determine which interrupt source is masked.
The masked interrupt source will not be serviced.
0 = Interrupt service is available.
1 = Interrupt service is masked.
0xFFFFFFFF
PRIORITY_MODE1 0x4A000030 R/W IRQ priority mode register 0x00000000
PRIORITY_
UPDATE1 0x4A000034 R/W IRQ priority update register 0x7F
SRCPND 2 0X4A000040 R/W Indicate the interrupt request status for group 2..
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
0x00000000
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-9
Register Address R/W Description Reset Value
request.
INTMOD 2 0X4A000044 R/W Interrupt mode regiseter for group 2.
0 = IRQ mode
1 = FIQ mode
0x00000000
INTMSK2 0X4A000048 R/W Determine which interrupt source of group 2 is
masked. The masked interrupt source will not be
serviced.
0 = Interrupt service is available.
1 = Interrupt service is masked.
0xFFFFFFFF
INTPND2 0X4A000050 R/W Indicate the interrupt request status for group 2.
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
INTOFFSET2 0X4A000054 R Indicate the IRQ interrupt request source for group
2 0x00000000
PRIORITY_MODE2 0x4A000070 R/W IRQ priority mode register 2 0x00000000
PRIORITY_
UPDATE2 0x4A000074 R/W IRQ priority update register 2 0x7F
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-10
2.1 SOURCE PENDING (SRCPND) REGISTER
The SRCPND register is composed of 32 bits each of which is related to an interrupt source. Each bit is set to 1 if
the corresponding interrupt source generates the interrupt request and waits for the interrupt to be serviced.
Accordingly, this register indicates which interrupt source is waiting for the request to be serviced. Note that each
bit of the SRCPND register is automatically set by the interrupt sources regardless of the masking bits in the
INTMASK register. In addition, the SRCPND register is not affected by the priority logic of interrupt controller.
In the interrupt service routine for a specific interrupt source, the corresponding bit of the SRCPND register has to
be cleared to get the interrupt request from the same source correctly. If you return from the ISR without clearing
the bit, the interrupt controller operates as if another interrupt request came in from the same source. In other
words, if a specific bit of the SRCPND register is set to 1, it is always considered as a valid interrupt request
waiting to be serviced.
The time to clear the corresponding bit depends on the user's requirement. If you want to receive another valid
request from the same source, you should clear the corresponding bit first, and then enable the interrupt.
You can clear a specific bit of the SRCPND register by writing a data to this register. It clears only the bit positions
of the SRCPND corresponding to those set to one in the data. The bit positions corresponding to those that are
set to 0 in the data remains as they are.
SOURCE PENDING (SRCPND 1) REGISTER FOR GROUP 1
Register Address R/W Description Reset Value
SRCPND 1 0X4A000000 R/W Indicate the interrupt request status for group 1.
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
SRCPND 2 0X4A000040 R/W Indicate the interrupt request status for group 2..
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
SRCPND 1 Bit Description Initial State
INT_ADC [31] 0 = Not requested, 1 = Requested 0
INT_RTC [30] 0 = Not requested, 1 = Requested 0
INT_SPI1 [29] 0 = Not requested, 1 = Requested 0
INT_UART0 [28] 0 = Not requested, 1 = Requested 0
INT_IIC0 [27] 0 = Not requested, 1 = Requested 0
INT_USBH [26] 0 = Not requested, 1 = Requested 0
INT_USBD [25] 0 = Not requested, 1 = Requested 0
INT_NAND [24] 0 = Not requested, 1 = Requested 0
INT_UART1 [23] 0 = Not requested, 1 = Requested 0
INT_SPI0 [22] 0 = Not requested, 1 = Requested 0
INT_SDI0 [21] 0 = Not requested, 1 = Requested 0
INT_SDI1 [20] 0 = Not requested, 1 = Requested 0
INT_CFCON [19] 0 = Not requested, 1 = Requested 0
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-11
SRCPND 1 Bit Description Initial State
INT_UART3 [18] 0 = Not requested, 1 = Requested 0
INT_DMA [17] 0 = Not requested, 1 = Requested 0
INT_LCD [16] 0 = Not requested, 1 = Requested 0
INT_UART2 [15] 0 = Not requested, 1 = Requested 0
INT_TIMER4 [14] 0 = Not requested, 1 = Requested 0
INT_TIMER3 [13] 0 = Not requested, 1 = Requested 0
INT_TIMER2 [12] 0 = Not requested, 1 = Requested 0
INT_TIMER1 [11] 0 = Not requested, 1 = Requested 0
INT_TIMER0 [10] 0 = Not requested, 1 = Requested 0
INT_WDT/AC97 [9] 0 = Not requested, 1 = Requested 0
INT_TICK [8] 0 = Not requested, 1 = Requested 0
nBATT_FLT [7] 0 = Not requested, 1 = Requested 0
INT_CAM [6] 0 = Not requested, 1 = Requested 0
EINT8_23 [5] 0 = Not requested, 1 = Requested 0
EINT4_7 [4] 0 = Not requested, 1 = Requested 0
EINT3 [3] 0 = Not requested, 1 = Requested 0
EINT2 [2] 0 = Not requested, 1 = Requested 0
EINT1 [1] 0 = Not requested, 1 = Requested 0
EINT0 [0] 0 = Not requested, 1 = Requested 0
SRCPND 2 Bit Description Initial State
INT_I2S1 [7] 0 = Not requested, 1 = Requested 0
INT_I2S0 [6] 0 = Not requested, 1 = Requested 0
INT_PCM1 [5] 0 = Not requested, 1 = Requested 0
INT_PCM0 [4] 0 = Not requested, 1 = Requested 0
Reserved [3] 0 = Not requested, 1 = Requested 0
Reserved [2] 0 = Not requested, 1 = Requested 0
INT_IIC1 [1] 0 = Not requested, 1 = Requested 0
INT_2D [0] 0 = Not requested, 1 = Requested 0
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-12
2.2 INTERRUPT MODE (INTMOD) REGISTER
This register is composed of 32 bits each of which is related to an interrupt source. If a specific bit is set to 1, the
corresponding interrupt is processed in the FIQ (fast interrupt) mode. Otherwise, it is processed in the IRQ mode
(normal interrupt).
Note that only one interrupt source can be serviced in the FIQ mode in the interrupt controller (you should use the
FIQ mode only for the urgent interrupt). Thus, only one bit of INTMOD can be set to 1.
Register Address R/W Description Reset Value
INTMOD 1 0X4A000004 R/W Interrupt mode regiseter for group 1.
0 = IRQ mode
1 = FIQ mode
0x00000000
INTMOD 2 0X4A000044 R/W Interrupt mode regiseter for group 2.
0 = IRQ mode
1 = FIQ mode
0x00000000
NOTE: If an interrupt mode is set to FIQ mode in the INTMOD register, FIQ interrupt will not affect both INTPND and
INTOFFSET registers. In this case, the two registers are valid only for IRQ mode interrupt source.
INTMOD1 Bit Description Initial State
INT_ADC [31] 0 = IRQ, 1 = FIQ 0
INT_RTC [30] 0 = IRQ, 1 = FIQ 0
INT_SPI1 [29] 0 = IRQ, 1 = FIQ 0
INT_UART0 [28] 0 = IRQ, 1 = FIQ 0
INT_IIC0 [27] 0 = IRQ, 1 = FIQ 0
INT_USBH [26] 0 = IRQ, 1 = FIQ 0
INT_USBD [25] 0 = IRQ, 1 = FIQ 0
INT_NAND [24] 0 = IRQ, 1 = FIQ 0
INT_UART1 [23] 0 = IRQ, 1 = FIQ 0
INT_SPI0 [22] 0 = IRQ, 1 = FIQ 0
INT_SDI0 [21] 0 = IRQ, 1 = FIQ 0
INT_SDI1 [20] 0 = IRQ, 1 = FIQ 0
INT_CFCON [19] 0 = IRQ, 1 = FIQ 0
INT_UART3 [18] 0 = IRQ, 1 = FIQ 0
INT_DMA [17] 0 = IRQ, 1 = FIQ 0
INT_LCD [16] 0 = IRQ, 1 = FIQ 0
INT_UART2 [15] 0 = IRQ, 1 = FIQ 0
INT_TIMER4 [14] 0 = IRQ, 1 = FIQ 0
INT_TIMER3 [13] 0 = IRQ, 1 = FIQ 0
INT_TIMER2 [12] 0 = IRQ, 1 = FIQ 0
INT_TIMER1 [11] 0 = IRQ, 1 = FIQ 0
INT_TIMER0 [10] 0 = IRQ, 1 = FIQ 0
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-13
INTMOD1 Bit Description Initial State
INT_WDT/AC97 [9] 0 = IRQ, 1 = FIQ 0
INT_TICK [8] 0 = IRQ, 1 = FIQ 0
nBATT_FLT [7] 0 = IRQ, 1 = FIQ 0
INT_CAM [6] 0 = IRQ, 1 = FIQ 0
EINT8_23 [5] 0 = IRQ, 1 = FIQ 0
EINT4_7 [4] 0 = IRQ, 1 = FIQ 0
EINT3 [3] 0 = IRQ, 1 = FIQ 0
EINT2 [2] 0 = IRQ, 1 = FIQ 0
EINT1 [1] 0 = IRQ, 1 = FIQ 0
EINT0 [0] 0 = IRQ, 1 = FIQ 0
INTMOD2 Bit Description Initial State
INT_I2S1 [7] 0 = IRQ, 1 = FIQ 0
INT_I2S0 [6] 0 = IRQ, 1 = FIQ 0
INT_PCM1 [5] 0 = IRQ, 1 = FIQ 0
INT_PCM0 [4] 0 = IRQ, 1 = FIQ 0
Reserved [3] 0 = IRQ, 1 = FIQ 0
Reserved [2] 0 = IRQ, 1 = FIQ 0
INT_IIC1 [1] 0 = IRQ, 1 = FIQ 0
INT_2D [0] 0 = IRQ, 1 = FIQ 0
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-14
2.3 INTERRUPT MASK (INTMSK) REGISTER
This register also has 32 bits each of which is related to an interrupt source. If a specific bit is set to 1, the CPU
does not service the interrupt request from the corresponding interrupt source (note that even in such a case, the
corresponding bit of SRCPND register is set to 1). If the mask bit is 0, the interrupt request can be serviced.
Register Address R/W Description Reset Value
INTMSK1 0X4A000008 R/W Determine which interrupt source of group 1is
masked. The masked interrupt source will not be
serviced.
0 = Interrupt service is available.
1 = Interrupt service is masked.
0xFFFFFFFF
INTMSK2 0X4A000048 R/W Determine which interrupt source of group 2 is
masked. The masked interrupt source will not be
serviced.
0 = Interrupt service is available.
1 = Interrupt service is masked.
0xFFFFFFFF
INTMSK1 Bit Description Initial State
INT_ADC [31] 0 = Service available, 1 = Masked 1
INT_RTC [30] 0 = Service available, 1 = Masked 1
INT_SPI1 [29] 0 = Service available, 1 = Masked 1
INT_UART0 [28] 0 = Service available, 1 = Masked 1
INT_IIC0 [27] 0 = Service available, 1 = Masked 1
INT_USBH [26] 0 = Service available, 1 = Masked 1
INT_USBD [25] 0 = Service available, 1 = Masked 1
INT_NAND [24] 0 = Service available, 1 = Masked 1
INT_UART1 [23] 0 = Service available, 1 = Masked 1
INT_SPI0 [22] 0 = Service available, 1 = Masked 1
INT_SDI0 [21] 0 = Service available, 1 = Masked 1
INT_SDI1 [20] 0 = Service available, 1 = Masked 1
INT_CFCON [19] 0 = Service available, 1 = Masked 1
INT_UART3 [18] 0 = Service available, 1 = Masked 1
INT_DMA [17] 0 = Service available, 1 = Masked 1
INT_LCD [16] 0 = Service available, 1 = Masked 1
INT_UART2 [15] 0 = Service available, 1 = Masked 1
INT_TIMER4 [14] 0 = Service available, 1 = Masked 1
INT_TIMER3 [13] 0 = Service available, 1 = Masked 1
INT_TIMER2 [12] 0 = Service available, 1 = Masked 1
INT_TIMER1 [11] 0 = Service available, 1 = Masked 1
INT_TIMER0 [10] 0 = Service available, 1 = Masked 1
INT_WDT/AC97 [9] 0 = Service available, 1 = Masked 1
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-15
INTMSK1 Bit Description Initial State
INT_TICK [8] 0 = Service available, 1 = Masked 1
nBATT_FLT [7] 0 = Service available, 1 = Masked 1
INT_CAM [6] 0 = Service available, 1 = Masked 1
EINT8_23 [5] 0 = Service available, 1 = Masked 1
EINT4_7 [4] 0 = Service available, 1 = Masked 1
EINT3 [3] 0 = Service available, 1 = Masked 1
EINT2 [2] 0 = Service available, 1 = Masked 1
EINT1 [1] 0 = Service available, 1 = Masked 1
EINT0 [0] 0 = Service available, 1 = Masked 1
INTMSK2 Bit Description Initial State
INT_I2S1 [7] 0 = Service available, 1 = Masked 1
INT_I2S0 [6] 0 = Service available, 1 = Masked 1
INT_PCM1 [5] 0 = Service available, 1 = Masked 1
INT_PCM0 [4] 0 = Service available, 1 = Masked 1
Reserved [3] 0 = Service available, 1 = Masked 1
Reserved [2] 0 = Service available, 1 = Masked 1
INT_IIC1 [1] 0 = Service available, 1 = Masked 1
INT_2D [0] 0 = Service available, 1 = Masked 1
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-16
2.4 INTERRUPT PENDING (INTPND) REGISTER
Each of the 32 bits in the interrupt pending register shows whether the corresponding interrupt request, which is
unmasked and waits for the interrupt to be serviced, has the highest priority. Since the INTPND register is located
after the priority logic, only one bit can be set to 1, and that interrupt request generates IRQ to CPU. In interrupt
service routine for IRQ, you can read this register to determine which interrupt source is serviced among the 32
sources.
Like the SRCPND register, this register has to be cleared in the interrupt service routine after clearing the
SRCPND register. We can clear a specific bit of the INTPND register by writing a data to this register. It clears
only the bit positions of the INTPND register corresponding to those set to one in the data. The bit positions
corresponding to those that are set to 0 in the data remains as they are.
Register Address R/W Description Reset Value
INTPND1 0X4A000010 R/W Indicate the interrupt request status for group 1.
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
INTPND2 0X4A000050 R/W Indicate the interrupt request status for group 2.
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
NOTES:
1. If the FIQ mode interrupt occurs, the corresponding bit of INTPND will not be turned on as the INTPND register is
available only for IRQ mode interrupt.
2. Cautions in clearing the INTPND register. The INTPND register is cleared to "0" by writing "1". If the INTPND bit, which
has "1", is cleared by "0", the INTPND register & INTOFFSET register may have unexpected value in some case.
So, you never write "0" on the INTPND bit having "1". The convenient method to clear the INTPND register is writing the
INTPND register value on the INTPND register. (In even our example code, this guide hasn't been applied yet.)
INTPND1 Bit Description Initial State
INT_ADC [31] 0 = Not requested, 1 = Requested 0
INT_RTC [30] 0 = Not requested, 1 = Requested 0
INT_SPI1 [29] 0 = Not requested, 1 = Requested 0
INT_UART0 [28] 0 = Not requested, 1 = Requested 0
INT_IIC0 [27] 0 = Not requested, 1 = Requested 0
INT_USBH [26] 0 = Not requested, 1 = Requested 0
INT_USBD [25] 0 = Not requested, 1 = Requested 0
INT_NAND [24] 0 = Not requested, 1 = Requested 0
INT_UART1 [23] 0 = Not requested, 1 = Requested 0
INT_SPI0 [22] 0 = Not requested, 1 = Requested 0
INT_SDI0 [21] 0 = Not requested, 1 = Requested 0
INT_SDI1 [20] 0 = Not requested, 1 = Requested 0
INT_CFCON [19] 0 = Not requested, 1 = Requested 0
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-17
INTPND1 Bit Description Initial State
INT_UART3 [18] 0 = Not requested, 1 = Requested 0
INT_DMA [17] 0 = Not requested, 1 = Requested 0
INT_LCD [16] 0 = Not requested, 1 = Requested 0
INT_UART2 [15] 0 = Not requested, 1 = Requested 0
INT_TIMER4 [14] 0 = Not requested, 1 = Requested 0
INT_TIMER3 [13] 0 = Not requested, 1 = Requested 0
INT_TIMER2 [12] 0 = Not requested, 1 = Requested 0
INT_TIMER1 [11] 0 = Not requested, 1 = Requested 0
INT_TIMER0 [10] 0 = Not requested, 1 = Requested 0
INT_WDT/AC97 [9] 0 = Not requested, 1 = Requested 0
INT_TICK [8] 0 = Not requested, 1 = Requested 0
nBATT_FLT [7] 0 = Not requested, 1 = Requested 0
INT_CAM [6] 0 = Not requested, 1 = Requested 0
EINT8_23 [5] 0 = Not requested, 1 = Requested 0
EINT4_7 [4] 0 = Not requested, 1 = Requested 0
EINT3 [3] 0 = Not requested, 1 = Requested 0
EINT2 [2] 0 = Not requested, 1 = Requested 0
EINT1 [1] 0 = Not requested, 1 = Requested 0
EINT0 [0] 0 = Not requested, 1 = Requested 0
INT_I2S1 [7] 0 = Not requested, 1 = Requested 0
INT_I2S0 [6] 0 = Not requested, 1 = Requested 0
INT_PCM1 [5] 0 = Not requested, 1 = Requested 0
INT_PCM0 [4] 0 = Not requested, 1 = Requested 0
Reserved [3] 0 = Not requested, 1 = Requested 0
Reserved [2] 0 = Not requested, 1 = Requested 0
INT_IIC1 [1] 0 = Not requested, 1 = Requested 0
INT_2D [0] 0 = Not requested, 1 = Requested 0
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-18
2.5 INTERRUPT OFFSET (INTOFFSET) REGISTER
The value in the interrupt offset register shows, which interrupt request of IRQ mode is in the INTPND register.
This bit can be cleared automatically by clearing SRCPND and INTPND.
Register Address R/W Description Reset Value
INTOFFSET1 0X4A000014 R Indicate the IRQ interrupt request source for group 1 0x00000000
INTOFFSET2 0X4A000054 R Indicate the IRQ interrupt request source for group 2 0x00000000
INT Source for group 1 The OFFSET Value INT Source for group 1 The OFFSET Value
INT_ADC 31 INT_UART2 15
INT_RTC 30 INT_TIMER4 14
INT_SPI1 29 INT_TIMER3 13
INT_UART0 28 INT_TIMER2 12
INT_IIC0 27 INT_TIMER1 11
INT_USBH 26 INT_TIMER0 10
INT_USBD 25 INT_WDT/AC97 9
INT_NAND 24 INT_TICK 8
INT_UART1 23 nBATT_FLT 7
INT_SPI0 22 INT_CAM 6
INT_SDI0 21 EINT8_23 5
INT_SDI1 20 EINT4_7 4
INT_CFCON 19 EINT3 3
INT_UART3 18 EINT2 2
INT_DMA 17 EINT1 1
INT_LCD 16 EINT0 0
INT Source for group 2 The OFFSET Value INT Source for group 2 The OFFSET Value
Reserved 31 Reserved 15
Reserved 30 Reserved 14
Reserved 29 Reserved 13
Reserved T0 28 Reserved 12
Reserved 27 Reserved 11
Reserved 26 Reserved 10
Reserved 25 Reserved 9
Reserved 24 Reserved 8
Reserved 23 INT_I2S1 7
Reserved 22 INT_I2S0 6
Reserved 21 INT_PCM1 5
Reserved 20 INT_PCM0 4
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-19
INT Source for group 2 The OFFSET Value INT Source for group 2 The OFFSET Value
Reserved 19 Reserved 3
Reserved 18 Reserved 2
Reserved 17 INT_IIC1 1
Reserved 16 INT_2D 0
NOTE: FIQ mode interrupt does not affect the INTOFFSET register as the register is available only for IRQ mode interrupt.
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-20
2.6 SUB SOURCE PENDING (SUBSRCPND) REGISTER
You can clear a specific bit of the SUBSRCPND register by writing a data to this register. It clears only the bit
positions of the SUBSRCPND register corresponding to those set to one in the data. The bit positions
corresponding to those that are set to 0 in the data remains as they are.
Register Address R/W Description Reset Value
SUBSRCPND 0X4A000018 R/W Indicate the interrupt request status.
0 = The interrupt has not been requested.
1 = The interrupt source has asserted the interrupt
request.
0x00000000
SUBSRCPND Bit Description SRCPND Initial State
Reserved [31] Not used 0
SUBINT_DMA7 [30] 0 = Not requested, 1 = Requested 0
SUBINT_DMA6 [29] 0 = Not requested, 1 = Requested
INT_DMA
0
SUBINT_AC97 [28] 0 = Not requested, 1 = Requested 0
SUBINT_WDT [27] 0 = Not requested, 1 = Requested
INT_WDT_AC97
0
SUBINT_ERR3 [26] 0 = Not requested, 1 = Requested 0
SUBINT_TXD3 [25] 0 = Not requested, 1 = Requested 0
SUBINT_RXD3 [24] 0 = Not requested, 1 = Requested
INT_UART3
0
SUBINT_DMA5 [23] 0 = Not requested, 1 = Requested 0
SUBINT_DMA4 [22] 0 = Not requested, 1 = Requested 0
SUBINT_DMA3 [21] 0 = Not requested, 1 = Requested 0
SUBINT_DMA2 [20] 0 = Not requested, 1 = Requested 0
SUBINT_DMA1 [19] 0 = Not requested, 1 = Requested 0
SUBINT_DMA0 [18] 0 = Not requested, 1 = Requested
INT_DMA
0
SUBINT_LCD4
(i80 I/F) [17] 0 = Not requested, 1 = Requested 0
SUBINT_LCD3
(LCD Frame) [16] 0 = Not requested, 1 = Requested 0
SUBINT_LCD2
(LCD FIFO) [15] 0 = Not requested, 1 = Requested 0
Reserved [14] Not used
INT_LCD
0
Reserved [13] Reserved for future usage Reserved 0
SUBINT_CAM_P [12] 0 = Not requested, 1 = Requested 0
SUBINT_CAM_C [11] 0 = Not requested, 1 = Requested
INT_CAM
0
SUBINT_ADC [10] 0 = Not requested, 1 = Requested 0
SUBINT_TC [9] 0 = Not requested, 1 = Requested
INT_ADC
0
SUBINT_ERR2 [8] 0 = Not requested, 1 = Requested 0
SUBINT_TXD2 [7] 0 = Not requested, 1 = Requested 0
SUBINT_RXD2 [6] 0 = Not requested, 1 = Requested
INT_UART2
0
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-21
SUBSRCPND Bit Description SRCPND Initial State
SUBINT_ERR1 [5] 0 = Not requested, 1 = Requested 0
SUBINT_TXD1 [4] 0 = Not requested, 1 = Requested 0
SUBINT_RXD1 [3] 0 = Not requested, 1 = Requested
INT_UART1
0
SUBINT_ERR0 [2] 0 = Not requested, 1 = Requested 0
SUBINT_TXD0 [1] 0 = Not requested, 1 = Requested 0
SUBINT_RXD0 [0] 0 = Not requested, 1 = Requested
INT_UART0
0
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-22
2.7 INTERRUPT SUB MASK (INTSUBMSK) REGISTER
This register has 27 bits each of which is related to an interrupt source. If a specific bit is set to 1, the interrupt
request from the corresponding interrupt source is not serviced by the CPU (note that even in such a case, the
corresponding bit of the SUBSRCPND register is set to 1). If the mask bit is 0, the interrupt request can be
serviced.
Register Address R/W Description Reset Value
INTSUBMSK 0X4A00001C R/W Determine which interrupt source is masked.
The masked interrupt source will not be serviced.
0 = Interrupt service is available.
1 = Interrupt service is masked.
0xFFFFFFFF
INTSUBMASK Bit Description INTMASK Initial State
Reserved [31] Not used 1
SUBINT_DMA7 [30] 0 = Service available, 1 = Masked
SUBINT_DMA6 [29] 0 = Service available, 1 = Masked
INT_DMA
SUBINT_AC97 [28] 0 = Service available, 1 = Masked 1
SUBINT_WDT [27] 0 = Service available, 1 = Masked
INT_WDT_AC97
1
SUBINT_ERR3 [26] 0 = Service available, 1 = Masked 1
SUBINT_TXD3 [25] 0 = Service available, 1 = Masked 1
SUBINT_RXD3 [24] 0 = Service available, 1 = Masked
INT_UART3
1
SUBINT_DMA5 [23] 0 = Service available, 1 = Masked 1
SUBINT_DMA4 [22] 0 = Service available, 1 = Masked 1
SUBINT_DMA3 [21] 0 = Service available, 1 = Masked 1
SUBINT_DMA2 [20] 0 = Service available, 1 = Masked 1
SUBINT_DMA1 [19] 0 = Service available, 1 = Masked 1
SUBINT_DMA0 [18] 0 = Service available, 1 = Masked
INT_DMA
1
SUBINT_LCD4
(i80 I/F) [17] 0 = Service available, 1 = Masked 1
SUBINT_LCD3
(LCD Frame) [16] 0 = Service available, 1 = Masked 1
SUBINT_LCD2
(LCD FIFO) [15] 0 = Service available, 1 = Masked 1
Reserved [14] Not used
INT_LCD
1
Reserved [13] Reserved for future usage Reserved 1
SUBINT_CAM_P [12] 0 = Service available, 1 = Masked 1
SUBINT_CAM_C [11] 0 = Service available, 1 = Masked
INT_CAM
1
SUBINT_ADC [10] 0 = Service available, 1 = Masked 1
SUBINT_TC [9] 0 = Service available, 1 = Masked
INT_ADC
1
SUBINT_ERR2 [8] 0 = Service available, 1 = Masked 1
SUBINT_TXD2 [7] 0 = Service available, 1 = Masked
INT_UART2
1
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-23
INTSUBMASK Bit Description INTMASK Initial State
SUBINT_RXD2 [6] 0 = Service available, 1 = Masked 1
SUBINT_ERR1 [5] 0 = Service available, 1 = Masked 1
SUBINT_TXD1 [4] 0 = Service available, 1 = Masked 1
SUBINT_RXD1 [3] 0 = Service available, 1 = Masked
INT_UART1
1
SUBINT_ERR0 [2] 0 = Service available, 1 = Masked 1
SUBINT_TXD0 [1] 0 = Service available, 1 = Masked 1
SUBINT_RXD0 [0] 0 = Service available, 1 = Masked
INT_UART0
1
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-24
2.8 PRIORITY MODE REGISTER (PRIORITY_MODE)
Register Address R/W Description Reset Value
PRIORITY_MODE1 0x4A000030 R/W IRQ priority mode register 0x00000000
PRIORITY_MODE2 0x4A000070 R/W IRQ priority mode register 0x00000000
PRIORITY_MODE1 Bit Description Initial State
ARB_MODE6 [27] Arbiter 6 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL6 [26:24] Arbiter 6 group priority order set
1) ARB_MODE6 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE6 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE5 [23] Arbiter 5 group priority mode selection
0 = Fixed ends & Rotate middle
0
ARB_SEL5 [22:20] Arbiter 5 group priority order set
1) ARB_MODE5 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
0
ARB_MODE4 [19] Arbiter 4 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL4 [18:16] Arbiter 4 group priority order set
1) ARB_MODE4 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE4 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-25
PRIORITY_MODE1 Bit Description Initial State
ARB_MODE3 [15] Arbiter 3 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL3 [14:12] Arbiter 3 group priority order set
1) ARB_MODE3 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE3 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE2 [11] Arbiter 2 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL2 [10:8] Arbiter 2 group priority order set
1) ARB_MODE2 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE2 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE1 [7] Arbiter 1 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL1 [6:4] Arbiter 1 group priority order set
1) ARB_MODE1 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE1 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
0
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-26
PRIORITY_MODE1 Bit Description Initial State
101 = REQ 5-0-1-2-3-4
ARB_MODE0 [3] Arbiter 0 group priority mode selection
0 = Fixed ends & Rotate middle
0
ARB_SEL0 [2:0] Arbiter 0 group priority order set
1) ARB_MODE0 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
0
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-27
PRIORITY_MODE2 Bit Description Initial State
ARB_MODE13 [27] Arbiter 13 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL13 [26:24] Arbiter 13 group priority order set
1) ARB_MODE13 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE13 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE12 [23] Arbiter 12 group priority mode selection
0 = Fixed ends & Rotate middle
0
ARB_SEL12 [22:20] Arbiter 12 group priority order set
1) ARB_MODE12 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
0
ARB_MODE11 [19] Arbiter 11 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL11 [18:16] Arbiter 11 group priority order set
1) ARB_MODE11 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE11 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE10 [15] Arbiter 10 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL10 [14:12] Arbiter 10 group priority order set 0
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-28
PRIORITY_MODE2 Bit Description Initial State
1) ARB_MODE10 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE10 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
ARB_MODE9 [11] Arbiter 9 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL9 [10:8] Arbiter 9 group priority order set
1) ARB_MODE9 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE9 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE8 [7] Arbiter 8 group priority mode selection
0 = Fixed ends & Rotate middle
1 = Rotate all
0
ARB_SEL8 [6:4] Arbiter 8 group priority order set
1) ARB_MODE8 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE8 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE7 [3] Arbiter 7 group priority mode selection
0 = Fixed ends & Rotate middle
0
S3C2450X RISC MICROPROCESSOR INTERRUPT CONTROLLER
10-29
PRIORITY_MODE2 Bit Description Initial State
ARB_SEL7 [2:0] Arbiter 7 group priority order set
1) ARB_MODE7 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
0
2.9 PRIORITY UPDATE REGISTER (PRIORITY_UPDATE)
Register Address R/W Description Reset Value
PRIORITY_
UPDATE1 0x4A000034 R/W IRQ priority update register 0x7F
PRIORITY_
UPDATE2 0x4A000074 R/W IRQ priority update register 0x7F
PRIORITY_UPDATE1 Bit Description Initial State
ARB_UPDATE6 [6] Arbiter 6 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE5 [5] Arbiter 5 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE4 [4] Arbiter 4 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE3 [3] Arbiter 3 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE2 [2] Arbiter 2 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE1 [1] Arbiter 1 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE0 [0] Arbiter 0 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
INTERRUPT CONTROLLER S3C2450X RISC MICROPROCESSOR
10-30
PRIORITY_UPDATE2 Bit Description Initial State
ARB_UPDATE13 [6] Arbiter 13 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE12 [5] Arbiter 12 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE11 [4] Arbiter 11 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE10 [3] Arbiter 10 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE9 [2] Arbiter 9 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE8 [1] Arbiter 8 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
ARB_UPDATE7 [0] Arbiter 7 group priority rotate enable
0 = Priority does not rotate
1 = Priority rotate enable
1
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-1
11 I/O PORTS
1 OVERVIEW
S3C2450 has 174 multi-functional input/output port pins and there are 12 ports as shown below:
• Port A(GPA) : 27-output port
• Port B(GPB) : 11-input/output port
• Port C(GPC) : 16-input/output port
• Port D(GPD) : 16-input/output port
• Port E(GPE) : 16-input/output port
• Port F(GPF) : 8-input/output port
• Port G(GPG) : 16-input/output port
• Port H(GPH) : 15-input/output port
• Port J(GPJ) : 16-input/output port
• Port K(GPK) : 16-input/output port
• Port L(GPL) : 15-input/output port
• Port M(GPM) : 2-input port
Each port can be easily configured by software to meet various system configurations and design requirements.
You have to define which function of each pin is used before starting the main program. If a pin is not used for
multiplexed functions, the pin can be configured as I/O ports.
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-2
Table 11-1. S3C2450 Port Configuration (Sheet 1)
Port A Selectable Pin Functions
GPA27 Output only nWE_CF − −
GPA26 Output only DQM3 − −
GPA25 Output only DQM2 − −
GPA24 Output only RSMAVD − −
GPA23 Output only RSMCLK − −
GPA22 Output only nFCE − −
GPA21 Output only nRSTOUT − −
GPA20 Output only nFRE − −
GPA19 Output only nFWE − −
GPA18 Output only ALE − −
GPA17 Output only CLE − −
GPA16 Output only nRCS5 − −
GPA15 Output only nRCS4 − −
GPA14 Output only nRCS3 − −
GPA13 Output only nRCS2 − −
GPA12 Output only nRCS1 − −
GPA11 Output only nOE_CF − −
GPA10 Reserved RADDR25 − −
GPA9 Output only RADDR24 − −
GPA8 Output only RADDR23 − −
GPA7 Output only RADDR22 − −
GPA6 Output only RADDR21 − −
GPA5 Output only RADDR20 − −
GPA4 Output only RADDR19 − −
GPA3 Output only RADDR18 − −
GPA2 Output only RADDR17 − −
GPA1 Output only RADDR16 − −
GPA0 Output only RADDR0 − −
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-3
Table 11-1. S3C2450 Port Configuration (Sheet 2) (Continued)
Port B Selectable Pin Functions
GPB10 Input/output nXDREQ0 XDREQ0 I2SSDO_2
GPB9 Input/output nXDACK0 XDACK0 I2SSDO_1
GPB8 Input/output nXDREQ1 XDREQ1 I2CSCL
GPB7 Input/output nXDACK1 XDACK1 I2CSDA
GPB6 Input/output nXBREQ XBREQ RTCK
GPB5 Input/output nXBACK XBACK −
GPB4 Input/output TCLK − −
GPB3 Input/output TOUT3 − −
GPB2 Input/output TOUT2 − −
GPB1 Input/output TOUT1 − −
GPB0 Input/output TOUT0 − −
Port C Selectable Pin Functions
GPC15 Input/output RGB_VD7/SYS_VD7 − −
GPC14 Input/output RGB_VD6/SYS_VD6 − −
GPC13 Input/output RGB_VD5/SYS_VD5 − −
GPC12 Input/output RGB_VD4/SYS_VD4 − −
GPC11 Input/output RGB_VD3/SYS_VD3 − −
GPC10 Input/output RGB_VD2/SYS_VD2 − −
GPC9 Input/output RGB_VD1/SYS_VD1 − −
GPC8 Input/output RGB_VD0/SYS_VD0 − −
GPC7 Input/output − − −
GPC6 Input/output − − −
GPC5 Input/output − − −
GPC4 Input/output RGB_VDEN/SYS_RS − −
GPC3 Input/output RGB_VSYNC/SYS_CS
1
− −
GPC2 Input/output RGB_HSYNC/SYS_CS
0
− −
GPC1 Input/output RGB_VCLK/SYS_WR − −
GPC0 Input/output RGB_LEND/SYS_OE − −
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-4
Table 11-1. S3C2450 Port Configuration (Sheet 3) (Continued)
Port D Selectable Pin Functions
GPD15 Input/output RGB_VD23 − −
GPD14 Input/output RGB_VD22 − −
GPD13 Input/output RGB_VD21 − −
GPD12 Input/output RGB_VD20 − −
GPD11 Input/output RGB_VD19 − −
GPD10 Input/output RGB_VD18 − −
GPD9 Input/output RGB_VD17/SYS_VD17 − −
GPD8 Input/output RGB_VD16/SYS_VD16 − −
GPD7 Input/output RGB_VD15/SYS_VD15 − −
GPD6 Input/output RGB_VD14/SYS_VD14 − −
GPD5 Input/output RGB_VD13/SYS_VD13 − −
GPD4 Input/output RGB_VD12/SYS_VD12 − −
GPD3 Input/output RGB_VD11/SYS_VD11 − −
GPD2 Input/output RGB_VD10/SYS_VD10 − −
GPD1 Input/output RGB_VD9/SYS_VD9 − −
GPD0 Input/output RGB_VD8/SYS_VD8 − −
Port E Selectable Pin Functions
GPE15 Input/output IICSDA − −
GPE14 Input/output IICSCL − −
GPE13 Input/output SPICLK0 − −
GPE12 Input/output SPIMOSI0 − −
GPE11 Input/output SPIMISO0 − −
GPE10 Input/output SD0_DAT3 − −
GPE9 Input/output SD0_DAT2 − −
GPE8 Input/output SD0_DAT1 − −
GPE7 Input/output SD0_DAT0 − −
GPE6 Input/output SD0_CMD − −
GPE5 Input/output SD0_CLK − −
GPE4 Input/output I2SSDO AC_SDO PCM0_SDO
GPE3 Input/output I2SSDI AC_SDI PCM0_SDI
GPE2 Input/output I2SCDCLK AC_BIT_CLK PCM0_CDCLK
GPE1 Input/output I2SSCLK AC_SYNC PCM0_SCLK
GPE0 Input/output I2SLRCK AC_nRESET PCM0_FSYNC
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-5
Table 11-1. S3C2450 Port Configuration (Sheet 4) (Continued)
Port F Selectable Pin Functions
GPF7 Input/output EINT7 − −
GPF6 Input/output EINT6 − −
GPF5 Input/output EINT5 − −
GPF4 Input/output EINT4 − −
GPF3 Input/output EINT3 − −
GPF2 Input/output EINT2 − −
GPF1 Input/output EINT1 − −
GPF0 Input/output EINT0 − −
Port G Selectable Pin Functions
GPG15 Input/output EINT23 CARD_PWREN −
GPG14 Input/output EINT22 RESET_CF −
GPG13 Input/output EINT21 nREG_CF −
GPG12 Input/output EINT20 nINPACK −
GPG11 Input/output EINT19 nIREQ_CF −
GPG10 Input/output EINT18 CAM_FIELD_A −
GPG9 Input/output EINT17 − −
GPG8 Input/output EINT16 − −
GPG7 Input/output EINT15 − −
GPG6 Input/output EINT14 − −
GPG5 Input/output EINT13 − −
GPG4 Input/output EINT12 − −
GPG3 Input/output EINT11 − −
GPG2 Input/output EINT10 − −
GPG1 Input/output EINT9 − −
GPG0 Input/output EINT8 − −
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-6
Table 11-1. S3C2450 Port Configuration (Sheet 5) (Continued)
Port H Selectable Pin Functions
GPH14 Input/output CLKOUT1 − −
GPH13 Input/output CLKOUT0 − −
GPH12 Input/output EXTUARTCLK − −
GPH11 Input/output nRTS1 − −
GPH10 Input/output nCTS1 − −
GPH9 Input/output nRTS0 − −
GPH8 Input/output nCTS0 − −
GPH7 Input/output RXD3 nCTS2 −
GPH6 Input/output TXD3 nRTS2 −
GPH5 Input/output RXD2 − −
GPH4 Input/output TXD2 − −
GPH3 Input/output RXD1 − −
GPH2 Input/output TXD1 − −
GPH1 Input/output RXD0 − −
GPH0 Input/output TXD0 − −
Port J Selectable Pin Functions
GPJ15 Input/output nSD1_WP − −
GPJ14 Input/output nSD1_CD − −
GPJ13 Input/output SD1_LED I2S1_LRCK PCM1_FSYNC
GPJ12 Input/output CAMRESET − −
GPJ11 Input/output CAMCLKOUT − −
GPJ10 Input/output CAMHREF − −
GPJ9 Input/output CAMVSYNC − −
GPJ8 Input/output CAMPCLK − −
GPJ7 Input/output CAMDATA7 − −
GPJ6 Input/output CAMDATA6 − −
GPJ5 Input/output CAMDATA5 − −
GPJ4 Input/output CAMDATA4 − −
GPJ3 Input/output CAMDATA3 − −
GPJ2 Input/output CAMDATA2 − −
GPJ1 Input/output CAMDATA1 − −
GPJ0 Input/output CAMDATA0 − −
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-7
Table 11-1. S3C2450 Port Configuration (Sheet 6) (Continued)
Port K Selectable Pin Functions
GPK15 Input/output SDATA31 − −
GPK14 Input/output SDATA30 − −
GPK13 Input/output SDATA29 − −
GPK12 Input/output SDATA28 − −
GPK11 Input/output SDATA27 − −
GPK10 Input/output SDATA26 − −
GPK9 Input/output SDATA25 − −
GPK8 Input/output SDATA24 − −
GPK7 Input/output SDATA23 − −
GPK6 Input/output SDATA22 − −
GPK5 Input/output SDATA21 − −
GPK4 Input/output SDATA20 − −
GPK3 Input/output SDATA19 − −
GPK2 Input/output SDATA18 − −
GPK1 Input/output SDATA17 − −
GPK0 Input/output SDATA16 − −
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-8
Table 11-1. S3C2450 Port Configuration (Sheet7) (Continued)
Port L Selectable Pin Functions
GPL14 Input/output SS1 − −
GPL13 Input/output SS0 − −
GPL12 Input/output SPIMISO1 − −
GPL11 Input/output SPIMOSI1 − −
GPL10 Input/output SPICLK1 − −
GPL9 Input/output SD1_CLK − −
GPL8 Input/output SD1_CMD − −
GPL7 Input/output SD1_DAT7 I2S1_SDO PCM1_SDO
GPL6 Input/output SD1_DAT6 I2S1_SDI PCM1_SDI
GPL5 Input/output SD1_DAT5 I2S1_CDCLK PCM1_CDCLK
GPL4 Input/output SD1_DAT4 I2S1_SCLK PCM1_SCLK
GPL3 Input/output SD1_DAT3 − −
GPL2 Input/output SD1_DAT2 − −
GPL1 Input/output SD1_DAT1 − −
GPL0 Input/output SD1_DAT0 − −
Port M Selectable Pin Functions
GPM1 Input FRnB − −
GPM0 Input RSMBWAIT − −
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-9
2 PORT CONTROL DESCRIPTIONS
2.1 PORT CONFIGURATION REGISTER (GPACON-GPMCON)
In S3C2450, most of the pins are multiplexed pins. So, It is determined which function is selected for each pins.
The GPxCON(port control register) determines which function is used for each pin.
If GPF0 – GPF7, GPG0 – GPG7 is used for the wakeup signal in Sleep/Stop/DeepStop mode, these ports must
be configured in EINT.
2.2 PORT DATA REGISTER (GPADAT-GPMDAT)
If ports are configured as output ports, data can be written to the corresponding bit of GPxDAT. If Ports are
configured as input ports, the data can be read from the corresponding bit of GPxDAT.
2.3 PORT PULL-UP/DOWN REGISTER (GPBUDP-GPMUDP)
The port pull-up/down register controls the pull-up/down resister enable/disable of each port group. When the
corresponding bit is 0, the pull-down resister of the pin is enabled. When 1, the pull-down resister is disabled.
If the port pull-down register is enabled then the pull-down resisters work without pin’s functional setting(input,
output, DATAn, EINTn and etc)
2.4 MISCELLANEOUS CONTROL REGISTER
This register controls mode selection, and CLKOUT selection.
2.5 EXTERNAL INTERRUPT CONTROL REGISTER
The 24 external interrupts are requested by various signaling methods. The EXTINT register configures the
signaling method among the low level trigger, high level trigger, falling edge trigger, rising edge trigger, and both
edge trigger for the external interrupt request
Because each external interrupt pin has a digital filter, the interrupt controller can recognize the request signal that
is longer than 3 clocks.
EINT[15:0] are used for wakeup sources from Sleep/Stop/DeepStop mode.
Caution
I/O ports In VDD_SD power domain release retention automatically when I/O ports are waken up from sleep
mode. In Stop/DeepStop/Sleep mode GPA/GPK status are controlled by PDSMCON/PDDMCON. They control
GPA/GPK as a few groups. For example like GPA1 and GPA2 individual control is impossible in sleep mode.
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-10
3 I/O PORT CONTROL REGISTER
3.1 PORT A CONTROL REGISTERS (GPACON, GPADAT)
Register Address R/W Description Reset Value
GPACON 0x56000000 R/W Configures the pins of port A 0x0fffffff
GPADAT 0x56000004 R/W The data register for port A 0x0
Reserved 0x56000008 − − −
Reserved 0x5600000c − − −
GPACON Bit Description
Reserved [31:28] Reserved
GPA27 [27] 0 = Output 1 = nWE_CF
GPA26 [26] 0 = Output 1 = DQM3
GPA25 [25] 0 = Output 1 = DQM2
GPA24 [24] 0 = Output 1 = RSMAVD
GPA23 [23] 0 = Output 1 = RSMCLK
GPA22 [22] 0 = Output 1 = nFCE
GPA21 [21] 0 = Output 1 = nRSTOUT
GPA20 [20] 0 = Output 1 = nFRE
GPA19 [19] 0 = Output 1 = nFWE
GPA18 [18] 0 = Output 1 = ALE
GPA17 [17] 0 = Output 1 = CLE
GPA16 [16] 0 = Output 1 = nRCS[5]
GPA15 [15] 0 = Output 1 = nRCS[4]
GPA14 [14] 0 = Output 1 = nRCS[3]
GPA13 [13] 0 = Output 1 = nRCS[2]
GPA12 [12] 0 = Output 1 = nRCS[1]
GPA11 [11] 0 = Output 1 = nOE_CF
GPA10 [10] 0 = Reserved 1 = RADDR25
GPA9 [9] 0 = Output 1 = RADDR24
GPA8 [8] 0 = Output 1 = RADDR23
GPA7 [7] 0 = Output 1 = RADDR22
GPA6 [6] 0 = Output 1 = RADDR21
GPA5 [5] 0 = Output 1 = RADDR20
GPA4 [4] 0 = Output 1 = RADDR19
GPA3 [3] 0 = Output 1 = RADDR18
GPA2 [2] 0 = Output 1 = RADDR17
GPA1 [1] 0 = Output 1 = RADDR16
GPA0 [0] 0 = Output 1 = RADDR0
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-11
GPADAT Bit Description
Reserved [31:28] Reserved
GPA[27:0] [27:0] When the port is configured as output port, the pin state is the same as the
corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
NOTE: GPA10 is excluded in data output mode.
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-12
3.2 PORT B CONTROL REGISTERS (GPBCON, GPBDAT, GPBUDP, GPBSEL)
Register Address R/W Description Reset Value
GPBCON 0x56000010 R/W Configures the pins of port B 0x0
GPBDAT 0x56000014 R/W The data register for port B 0x0
GPBUDP 0x56000018 R/W Pull-up/down control register for port B 0x00154555
GPBSEL 0x5600001c R/W Selects the function of port B 0x1
GPBCON Bit Description
Reserved [31:22] Reserved
GPB10 [21:20] 00 = Input 01 = Output
10 = nXDREQ[0] 11 = XDREQ[0]
GPB9 [19:18] 00 = Input 01 = Output
10 = nXDACK[0] 11 = XDACK[0]
GPB8 [17:16] 00 = Input 01 = Output
10 = nXDREQ[1] 11 = XDREQ[1]
GPB7 [15:14] 00 = Input 01 = Output
10 = nXDACK[1] 11 = XDACK[1]
GPB6 [13:12] 00 = Input 01 = Output
10 = nXBREQ 11 = XBREQ
GPB5 [11:10] 00 = Input 01 = Output
10 = nXBACK 11 = XBACK
GPB4 [9:8] 00 = Input 01 = Output
10 = TCLK 11 = reserved
GPB3 [7:6] 00 = Input 01 = Output
10 = TOUT3 11 = reserved
GPB2 [5:4] 00 = Input 01 = Output
10 = TOUT2 11 = reserved
GPB1 [3:2] 00 = Input 01 = Output
10 = TOUT1 11 = reserved
GPB0 [1:0] 00 = Input 01 = Output
10 = TOUT0 11 = reserved
GPBDAT Bit Description
Reserved [31:11] Reserved
GPBDAT[10:0] [10:0] When the port is configured as input port, the corresponding bit is the pin
state. When the port is configured as output port, the pin state is the same
as the corresponding bit. When the port is configured as functional pin, the
undefined value will be read.
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-13
GPBUDP Bit Description
Reserved [31:22] Reserved
GPBUDP10
~
GPBUDP0
[21:20]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
GPBSEL Bit Description
Reserved [31:5] Reserved
GPB10SEL [4] 0 = GPB10 1 = I2SSDO_2
GPB9SEL [3] 0 = GPB9 1 = I2SSDO_1
GPB8SEL [2] 0 = GPB8 1 = I2CSCL
GPB7SEL [1] 0 = GPB7 1 = I2CSDA
GPB6SEL [0] 0 = GPB6 1 = RTCK
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-14
3.3 PORT C CONTROL REGISTERS (GPCCON, GPCDAT, GPCUDP)
Register Address R/W Description Reset Value
GPCCON 0x56000020 R/W Configures the pins of port C 0x0
GPCDAT 0x56000024 R/W The data register for port C 0x0
GPCUDP 0x56000028 R/W Pull-up/down control for port C 0x55555555
Reserved 0x5600002c − − −
GPCCON Bit Description
GPC15 [31:30] 00 = Input 01 = Output
10 = RGB/SYS_VD[7] 11 = Reserved
GPC14 [29:28] 00 = Input 01 = Output
10 = RGB/SYS_VD[6] 11 = Reserved
GPC13 [27:26] 00 = Input 01 = Output
10 = RGB/SYS_VD[5] 11 = Reserved
GPC12 [25:24] 00 = Input 01 = Output
10 = RGB/SYS_VD[4] 11 = Reserved
GPC11 [23:22] 00 = Input 01 = Output
10 = RGB/SYS_VD[3] 11 = Reserved
GPC10 [21:20] 00 = Input 01 = Output
10 = RGB/SYS_VD[2] 11 = Reserved
GPC9 [19:18] 00 = Input 01 = Output
10 = RGB/SYS_VD[1] 11 = Reserved
GPC8 [17:16] 00 = Input 01 = Output
10 = RGB/SYS_VD[0] 11 = Reserved
GPC7 [15:14] 00 = Input 01 = Output
10 = Reserved 11 = Reserved
GPC6 [13:12] 00 = Input 01 = Output
10 = Reserved 11 = Reserved
GPC5 [11:10] 00 = Input 01 = Output
10 = Reserved 11 = Reserved
GPC4 [9:8] 00 = Input 01 = Output
10 = RGB_VDEN/SYS_RS 11 = Reserved
GPC3 [7:6] 00 = Input 01 = Output
10 = RGB_VSYNC/SYS_CS1 11 = Reserved
GPC2 [5:4] 00 = Input 01 = Output
10 = RGB_HSYNC/SYS_CS0 11 = Reserved
GPC1 [3:2] 00 = Input 01 = Output
10 = RGB_VCLK/SYS_WR 11 = Reserved
GPC0 [1:0] 00 = Input 01 = Output
10 = RGB_LEND/SYS_OE 11 = Reserved
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-15
GPCDAT Bit Description
Reserved [31:16] Reserved
GPC[15:0] [15:0] When the port is configured as input port, the corresponding bit is the pin
state. When the port is configured as output port, the pin state is the same
as the corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
GPCUDP Bit Description
GPCUDP15
~
PCUDP0
[31:30]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-16
3.4 PORT D CONTROL REGISTERS (GPDCON, GPDDAT, GPDUDP)
Register Address R/W Description Reset Value
GPDCON 0x56000030 R/W Configures the pins of port D 0x0
GPDDAT 0x56000034 R/W The data register for port D 0x0
GPDUDP 0x56000038 R/W Pull-up/down control register for port D 0x55555555
Reserved 0x5600003c − − −
GPDCON Bit Description
GPD15 [31:30] 00 = Input 01 = Output
10 = RGB_VD[23] 11 = Reserved
GPD14 [29:28] 00 = Input 01 = Output
10 = RGB_VD[22] 11 = Reserved
GPD13 [27:26] 00 = Input 01 = Output
10 = RGB_VD[21] 11 = Reserved
GPD12 [25:24] 00 = Input 01 = Output
10 = RGB_VD[20] 11 = Reserved
GPD11 [23:22] 00 = Input 01 = Output
10 = RGB_VD[19] 11 = Reserved
GPD10 [21:20] 00 = Input 01 = Output
10 = RGB_VD[18] 11 = Reserved
GPD9 [19:18] 00 = Input 01 = Output
10 = RGB/SYS_VD[17] 11 = Reserved
GPD8 [17:16] 00 = Input 01 = Output
10 = RGB/SYS _VD[16] 11 = Reserved
GPD7 [15:14] 00 = Input 01 = Output
10 = RGB/SYS _VD[15] 11 = Reserved
GPD6 [13:12] 00 = Input 01 = Output
10 = RGB/SYS _VD[14] 11 = Reserved
GPD5 [11:10] 00 = Input 01 = Output
10 = RGB/SYS _VD[13] 11 = Reserved
GPD4 [9:8] 00 = Input 01 = Output
10 = RGB/SYS _VD[12] 11 = Reserved
GPD3 [7:6] 00 = Input 01 = Output
10 = RGB/SYS _VD[11] 11 = Reserved
GPD2 [5:4] 00 = Input 01 = Output
10 = RGB/SYS _VD[10] 11 = Reserved
GPD1 [3:2] 00 = Input 01 = Output
10 = RGB/SYS _VD[9] 11 = Reserved
GPD0 [1:0] 00 = Input 01 = Output
10 = RGB/SYS _VD[8] 11 = Reserved
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-17
GPDDAT Bit Description
Reserved [31:16] Reserved
GPD[15:0] [15:0] When the port is configured as input port, the corresponding bit is the pin state.
When the port is configured as output port, the pin state is the same as the
corresponding bit.
When the port is configured as functional pin, the undefined value will be read.
GPDUDP Bit Description
GPDUDP15
~
GPDUDP0
[31:30]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-18
3.5 PORT E CONTROL REGISTERS (GPECON, GPEDAT, GPEUDP, GPESEL)
Register Address R/W Description Reset Value
GPECON 0x56000040 R/W Configures the pins of port E 0x0
GPEDAT 0x56000044 R/W The data register for port E 0x0
GPEUDP 0x56000048 R/W Pull-up/down control register for port E 0x55555555
GPESEL 0x5600004c R/W Selects the function of port E 0x0
GPECON Bit Description
GPE15 [31:30] 00 = Input 01 = Output
10 = IICSDA 11 = Reserved
GPE14 [29:28] 00 = Input 01 = Output
10 = IICSCL 11 = Reserved
GPE13 [27:26] 00 = Input 01 = Output
10 = SPICLK0 11 = Reserved
GPE12 [25:24] 00 = Input 01 = Output
10 = SPIMOSI0 11 = Reserved
GPE11 [23:22] 00 = Input 01 = Output
10 = SPIMISO0 11 = Reserved
GPE10 [21:20] 00 = Input 01 = Output
10 = SD0_DAT3 11 = Reserved
GPE9 [19:18] 00 = Input 01 = Output
10 = SD0_DAT2 11 = Reserved
GPE8 [17:16] 00 = Input 01 = Output
10 = SD0_DAT1 11 = Reserved
GPE7 [15:14] 00 = Input 01 = Output
10 = SD0_DAT0 11 = Reserved
GPE6 [13:12] 00 = Input 01 = Output
10 = SD0_CMD 11 = Reserved
GPE5 [11:10] 00 = Input 01 = Output
10 = SD0_CLK 11 = Reserved
GPE4 [9:8] 00 = Input 01 = Output
10 = I2SDO 11 = AC_SDO
GPE3 [7:6] 00 = Input 01 = Output
10 = I2SDI 11 = AC_SDI
GPE2 [5:4] 00 = Input 01 = Output
10 = CDCLK 11 = AC_BIT_CLK
GPE1 [3:2] 00 = Input 01 = Output
10 = I2SSCLK 11 = AC_SYNC
GPE0 [1:0] 00 = Input 01 = Output
10 = I2SLRCK 11 = AC_nRESET
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-19
GPEDAT Bit Description
Reserved [31:16] Reserved
GPE[15:0] [15:0] When the port is configured as an input port, the corresponding bit is the pin
state. When the port is configured as an output port, the pin state is the
same as the corresponding bit.
When the port is configured as a functional pin, the undefined value will be
read.
GPEUDP Bit Description
GPEUDP15
~
GPEUDP0
[31:30]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
GPESEL Bit Description
Reserved [31:5] Reserved
GPE4SEL [4] 0 = GPE4 1 = PCM0_SDO
GPE3SEL [3] 0 = GPE3 1 = PCM0_SDI
GPE2SEL [2] 0 = GPE2 1 = PCM0_CDCLK
GPE1SEL [1] 0 = GPE1 1 = PCM0_SCLK
GPE0SEL [0] 0 = GPE0 1 = PCM0_FSYNC
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-20
3.6 PORT F CONTROL REGISTERS (GPFCON, GPFDAT, GPFUDP)
If GPF0 − GPF7 will be used for wake-up signals from Sleep/Stop/Deep Stop mode, the ports will be set in EINT.
Register Address R/W Description Reset Value
GPFCON 0x56000050 R/W Configures the pins of port F 0x0
GPFDAT 0x56000054 R/W The data register for port F 0x0
GPFUDP 0x56000058 R/W Pull-up/down control register for port F 0x5555
Reserved 0x5600005c − − −
GPFCON Bit Description
Reserved [31:16] Reserved
GPF7 [15:14] 00 = Input 01 = Output
10 = EINT[7] 11 = Reserved
GPF6 [13:12] 00 = Input 01 = Output
10 = EINT[6] 11 = Reserved
GPF5 [11:10] 00 = Input 01 = Output
10 = EINT[5] 11 = Reserved
GPF4 [9:8] 00 = Input 01 = Output
10 = EINT[4] 11 = Reserved
GPF3 [7:6] 00 = Input 01 = Output
10 = EINT[3] 11 = Reserved
GPF2 [5:4] 00 = Input 01 = Output
10 = EINT[2] 11 = Reserved
GPF1 [3:2] 00 = Input 01 = Output
10 = EINT[1] 11 = Reserved
GPF0 [1:0] 00 = Input 01 = Output
10 = EINT[0] 11 = Reserved
GPFDAT Bit Description
Reserved [31:8] Reserved
GPF[7:0] [7:0] When the port is configured as an input port, the corresponding bit is the
pin state. When the port is configured as an output port, the pin state is the
same as the corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
GPFUDP Bit Description
Reserved [31:16] Reserved
GPFUDP7
~
GPFUDP0
[15:14]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-21
3.7 PORT G CONTROL REGISTERS (GPGCON, GPGDAT, GPGUDP)
If GPG0–GPG7 will be used for wake-up signals from Sleep/Stop/Deep Stop mode, the ports will be set in EINT.
Register Address R/W Description Reset Value
GPGCON 0x56000060 R/W Configures the pins of port G 0x0
GPGDAT 0x56000064 R/W The data register for port G 0x0
GPGUDP 0x56000068 R/W Pull-up/down control register for port G 0x55555555
GPGCON Bit Description
GPG15 [31:30] 00 = Input 01 = Output
10 = EINT[23] 11 = CARD_PWREN
GPG14 [29:28] 00 = Input 01 = Output
10 = EINT[22] 11 = RESET_CF
GPG13* [27:26] 00 = Input 01 = Output
10 = EINT[21] 11 = nREG_CF
GPG12 [25:24] 00 = Input 01 = Output
10 = EINT[20] 11 = nINPACK
GPG11 [23:22] 00 = Input 01 = Output
10 = EINT[19] 11 = nIREQ_CF
GPG10 [21:20] 00 = Input 01 = Output
10 = EINT[18] 11 = CAM_FIELD_A
GPG9 [19:18] 00 = Input 01 = Output
10 = EINT[17] 11 = Reserved
GPG8 [17:16] 00 = Input 01 = Output
10 = EINT[16] 11 = Reserved
GPG7 [15:14] 00 = Input 01 = Output
10 = EINT[15] 11 = Reserved
GPG6 [13:12] 00 = Input 01 = Output
10 = EINT[14] 11 = Reserved
GPG5 [11:10] 00 = Input 01 = Output
10 = EINT[13] 11 = Reserved
GPG4 [9:8] 00 = Input 01 = Output
10 = EINT[12] 11 = Reserved
GPG3 [7:6] 00 = Input 01 = Output
10 = EINT[11] 11 = Reserved
GPG2 [5:4] 00 = Input 01 = Output
10 = EINT[10] 11 = Reserved
GPG1 [3:2] 00 = Input 01 = Output
10 = EINT[9] 11 = Reserved
GPG0 [1:0] 00 = Input 01 = Output
10 = EINT[8] 11 = Reserved
I/O PORTS S3C2450X RISC MICROPROCESSOR
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GPGDAT Bit Description
Reserved [31:16] Reserved
GPG[15:0] [15:0] When the port is configured as an input port, the corresponding bit is the
pin state. When the port is configured as an output port, the pin state is
the same as the corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
GPGUDP Bit Description
GPGUDP15
~
GPGUDP0
[31:30]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
S3C2450X RISC MICROPROCESSOR I/O PORTS
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3.8 PORT H CONTROL REGISTERS (GPHCON, GPHDAT, GPHUDP)
Register Address R/W Description Reset Value
GPHCON 0x56000070 R/W Configures the pins of port H 0x0
GPHDAT 0x56000074 R/W The data register for port H 0x0
GPHUDP 0x56000078 R/W pull-up/down control register for port H 0x15555555
Reserved 0x5600007c − − −
GPHCON Bit Description
Reserved [31:30] Reserved
GPH14 [29:28] 00 = Input 01 = Output
10 = CLKOUT1 11 = Reserved
GPH13 [27:26] 00 = Input 01 = Output
10 = CLKOUT0 11 = Reserved
GPH12 [25:24] 00 = Input 01 = Output
10 = EXTUARTCLK 11 = Reserved
GPH11 [23:22] 00 = Input 01 = Output
10 = nRTS1 11 = Reserved
GPH10 [21:20] 00 = Input 01 = Output
10 = nCTS1 11 = Reserved
GPH9 [19:18] 00 = Input 01 = Output
10 = nRTS0 11 = Reserved
GPH8 [17:16] 00 = Input 01 = Output
10 = nCTS0 11 = Reserved
GPH7 [15:14] 00 = Input 01 = Output
10 = RXD[3] 11 = nCTS2
GPH6 [13:12] 00 = Input 01 = Output
10 = TXD[3] 11 = nRTS2
GPH5 [11:10] 00 = Input 01 = Output
10 = RXD[2] 11 = Reserved
GPH4 [9:8] 00 = Input 01 = Output
10 = TXD[2] 11 = Reserved
GPH3 [7:6] 00 = Input 01 = Output
10 = RXD[1] 11 = reserved
GPH2 [5:4] 00 = Input 01 = Output
10 = TXD[1] 11 = Reserved
GPH1 [3:2] 00 = Input 01 = Output
10 = RXD[0] 11 = Reserved
GPH0 [1:0] 00 = Input 01 = Output
10 = TXD[0] 11 = Reserved
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GPHDAT Bit Description
Reserved [31:15] Reserved
GPH[14:0] [14:0] When the port is configured as an input port, the corresponding bit is the
pin state. When the port is configured as an output port, the pin state is
the same as the corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
GPHUDP Bit Description
Reserved [31:30] Reserved
GPHUDP14
~
GPHUDP0
[29:28]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
S3C2450X RISC MICROPROCESSOR I/O PORTS
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3.9 PORT J CONTROL REGISTERS (GPJCON, GPJDAT, GPJUDP, GPJSEL)
Register Address R/W Description Reset Value
GPJCON 0x560000d0 R/W Configures the pins of port J 0x0
GPJDAT 0x560000d4 R/W The data register for port J 0x0
GPJUDP 0x560000d8 R/W pull-up/down control register for port J 0x55555555
GPJSEL 0x560000dc R/W Selects the function of port J 0x0
GPJCON Bit Description
GPJ15 [31:30] 00 = Input 01 = Output
10 = nSD1_WP 11 = Reserved
GPJ14 [29:28] 00 = Input 01 = Output
10 = nSD1_CD 11 = Reserved
GPJ13 [27:26] 00 = Input 01 = Output
10 = SD1_LED 11 = I2S1_LRCK
GPJ12 [25:24] 00 = Input 01 = Output
10 = CAMRESET 11 = Reserved
GPJ11 [23:22] 00 = Input 01 = Output
10 = CAMCLKOUT 11 = Reserved
GPJ10 [21:20] 00 = Input 01 = Output
10 = CAMHREF 11 = Reserved
GPJ9 [19:18] 00 = Input 01 = Output
10 = CAMVSYNC 11 = Reserved
GPJ8 [17:16] 00 = Input 01 = Output
10 = CAMPCLK 11 = Reserved
GPJ7 [15:14] 00 = Input 01 = Output
10 = CAMDATA[7] 11 = Reserved
GPJ6 [13:12] 00 = Input 01 = Output
10 = CAMDATA[6] 11 = Reserved
GPJ5 [11:10] 00 = Input 01 = Output
10 = CAMDATA[5] 11 = Reserved
GPJ4 [9:8] 00 = Input 01 = Output
10 = CAMDATA[4] 11 = Reserved
GPJ3 [7:6] 00 = Input 01 = Output
10 = CAMDATA[3] 11 = Reserved
GPJ2 [5:4] 00 = Input 01 = Output
10 = CAMDATA[2] 11 = Reserved
GPJ1 [3:2] 00 = Input 01 = Output
10 = CAMDATA[1] 11 = Reserved
GPJ0 [1:0] 00 = Input 01 = Output
10 = CAMDATA[0] 11 = Reserved
I/O PORTS S3C2450X RISC MICROPROCESSOR
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GPJDAT Bit Description
Reserved [31:16] Reserved
GPJ[15:0] [15:0] When the port is configured as an input port, the corresponding bit is the
pin state. When the port is configured as an output port, the pin state is
the same as the corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
GPJUDP Bit Description
GPJUDP15
~
GPJUDP0
[31:30]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
GPJSEL Bit Description
Reserved [31:1] Reserved
GPJ13SEL [0] 0 = GPJ13 1 = PCM1_FSYNC
S3C2450X RISC MICROPROCESSOR I/O PORTS
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3.10 PORT K CONTROL REGISTERS (GPKCON, GPKDAT, GPKUDP)
Register Address R/W Description Reset Value
GPKCON 0x560000e0 R/W Configures the pins of port K 0xaaaaaaaa
GPKDAT 0x560000e4 R/W The data register for port K 0x0
GPKUDP 0x560000e8 R/W pull-up/down control register for port K 0x55555555
GPKCON Bit Description
GPK15 [31:30] 00 = Input 01 = Output
10 = Sdata[31] 11 = Reserved
GPK14 [29:28] 00 = Input 01 = Output
10 = Sdata[30] 11 = Reserved
GPK13 [27:26] 00 = Input 01 = Output
10 = Sdata[29] 11 = Reserved
GPK12 [25:24] 00 = Input 01 = Output
10 = Sdata[28] 11 = Reserved
GPK11 [23:22] 00 = Input 01 = Output
10 = Sdata[27] 11 = Reserved
GPK10 [21:20] 00 = Input 01 = Output
10 = Sdata[26] 11 = Reserved
GPK9 [19:18] 00 = Input 01 = Output
10 = Sdata[25] 11 = Reserved
GPK8 [17:16] 00 = Input 01 = Output
10 = Sdata[24] 11 = Reserved
GPK7 [15:14] 00 = Input 01 = Output
10 = Sdata[23] 11 = Reserved
GPK6 [13:12] 00 = Input 01 = Output
10 = Sdata[22] 11 = Reserved
GPK5 [11:10] 00 = Input 01 = Output
10 = Sdata[21] 11 = Reserved
GPK4 [9:8] 00 = Input 01 = Output
10 = Sdata[20] 11 = Reserved
GPK3 [7:6] 00 = Input 01 = Output
10 = Sdata[19] 11 = Reserved
GPK2 [5:4] 00 = Input 01 = Output
10 = Sdata[18] 11 = Reserved
GPK1 [3:2] 00 = Input 01 = Output
10 = Sdata[17] 11 = Reserved
GPK0 [1:0] 00 = Input 01 = Output
10 = Sdata[16] 11 = Reserved
I/O PORTS S3C2450X RISC MICROPROCESSOR
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GPKDAT Bit Description
GPK[15:0] [31:0] When the port is configured as an input port, the corresponding bit is the
pin state. When the port is configured as an output port, the pin state is
the same as the corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
GPKUDP Bit Description
GPKUDP15
~
GPKUDP0
[31:30]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
S3C2450X RISC MICROPROCESSOR I/O PORTS
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3.11 PORT L CONTROL REGISTERS (GPLCON, GPLDAT, GPLUDP, GPLSEL)
Register Address R/W Description Reset Value
GPLCON 0x560000f0 R/W Configures the pins of port L 0x0
GPLDAT 0x560000f4 R/W The data register for port L 0x0
GPLUDP 0x560000f8 R/W pull-up/down control register for port L 0x15555555
GPLSEL 0x560000fc R/W Selects the function of port L 0x0
GPLCON Bit Description
Reserved [31:30] Reserved
GPL14 [29:28] 00 = Input 01 = Output
10 = SS1 11 = Reserved
GPL13 [27:26] 00 = Input 01 = Output
10 = SS0 11 = Reserved
GPL12 [25:24] 00 = Input 01 = Output
10 = SPIMISO1 11 = Reserved
GPL11 [23:22] 00 = Input 01 = Output
10 = SPIMOSI1 11 = Reserved
GPL10 [21:20] 00 = Input 01 = Output
10 = SPICLK1 11 = Reserved
GPL9 [19:18] 00 = Input 01 = Output
10 = SD1_CLK 11 = Reserved
GPL8 [17:16] 00 = Input 01 = Output
10 = SD1_CMD 11 = Reserved
GPL7 [15:14] 00 = Input 01 = Output
10 = SD1_DAT7 11 = I2S1_SDO
GPL6 [13:12] 00 = Input 01 = Output
10 = SD1_DAT6 11 = I2S1_SDI
GPL5 [11:10] 00 = Input 01 = Output
10 = SD1_DAT5 11 = I2S1_CDCLK
GPL4 [9:8] 00 = Input 01 = Output
10 = SD1_DAT4 11 = I2S1_SCLK
GPL3 [7:6] 00 = Input 01 = Output
10 = SD1_DAT3 11 = Reserved
GPL2 [5:4] 00 = Input 01 = Output
10 = SD1_DAT2 11 = Reserved
GPL1 [3:2] 00 = Input 01 = Output
10 = SD1_DAT1 11 = Reserved
GPL0 [1:0] 00 = Input 01 = Output
10 = SD1_DAT0 11 = Reserved
I/O PORTS S3C2450X RISC MICROPROCESSOR
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GPLDAT Bit Description
Reserved [31:15] Reserved
GPL[14:0] [14:0] When the port is configured as an input port, the corresponding bit is the
pin state. When the port is configured as an output port, the pin state is
the same as the corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
GPLUDP Bit Description
Reserved [31:30] Reserved
GPLUDP14
~
GPLUDP0
[29:28]
~
[1:0]
[CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
GPLSEL Bit Description
Reserved [31:4] Reserved
GPL7SEL [3] 0 = GPL7 1 = PCM1_SDO
GPL6SEL [2] 0 = GPL6 1 = PCM1_SDI
GPL5SEL [1] 0 = GPL5 1 = PCM1_CDCLK
GPL4SEL [0] 0 = GPL4 1 = PCM1_SCLK
S3C2450X RISC MICROPROCESSOR I/O PORTS
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3.12 PORT M CONTROL REGISTERS (GPMCON, GPMDAT, GPMUDP)
Register Address R/W Description Reset Value
GPMCON 0x56000100 R/W Configures the pins of port M 0xA
GPMDAT 0x56000104 R The data register for port M 0x0
GPMUDP 0x560000108 R/W pull-up/down control register for port M 0x0
Reserved 0x56000010c − − −
GPMCON Bit Description
Reserved [31:4] Reserved
GPM1 [3:2] Others = GPM Input
10 = FRnB
GPM0 [1:0] Others = GPM Input
10 = RSMBWAIT
GPMDAT Bit Description
Reserved [31:2] Reserved
GPM[1:0] [1:0] When the port is configured as an input port, the corresponding bit is the pin
state
When the port is configured as functional pin, the undefined value will be read.
GPMUDP Bit Description
Reserved [31:6] Reserved
nWAIT [5:4] [CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
GPMUDP1 [3:2] [CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
GPMUDP0 [1:0] [CPU:CPD]
00 = pull-up/down disable
01 = pull-down enable
10 = pull-up enable
11 = not-available
I/O PORTS S3C2450X RISC MICROPROCESSOR
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3.13 MISCELLANEOUS CONTROL REGISTER (MISCCR)
In Sleep mode, the data bus(SD[15:0] or RD[15:0] can be set as Hi-Z and Output ‘0’ state. But, because of the
characteristics of IO pad, the data bus pull-up/down resisters have to be turned on or off to reduce the power
consumption. SD[15:0] or RD[15:0] pin pull-up/down resisters can be controlled by MISCCR register.
Pads related USB are controlled by this register for USB host, or for USB device.
Register Address R/W Description Reset Value
MISCCR 0x56000080 R/W Miscellaneous control register 0xd0000020
MISCCR Bit Description Reset Value
HSSPI_EN2 [31] Must be set ‘1’ 1
nCD_CF [30] nCD_CF Signal Register
0 = Card detected
1 = Card not detected
1
Reserved [29] Reserved 0
Reserved [28] Should be ‘1’ 1
Reserved [27:25] Reserved 000
FLT_I2C [24] Clocked Noise Filter Enable for IIC 0
Reserved [23:15] Reserved 0
USB_DPPD [14] USB DP Pull-down control
0 = Disable
1 = Enable
0
USB_DNPD [13] USB DN Pull-down control
0 = Disable
1 = Enable
0
SEL_SUSPND [12] USB Port Suspend mode
0 = Normal mode
1 = Suspend mode
0
Reserved [11] Reserved 0
CLKSEL1 * [10:8] Select source clock with CLKOUT1 pad
000 = RESERVED
001 = Gated EPLL output
010 = RTC clock output
011 = HCLK
100 = PCLK
101 = DCLK1(Divided PCLK)
11x = Reserved
000
Reserved [7] Reserved 0
S3C2450X RISC MICROPROCESSOR I/O PORTS
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MISCCR Bit Description Reset Value
CLKSEL0 * [6:4] Select source clock with CLKOUT0 pad
000 = MPLL INPUT Clock(XTAL)
001 = EPLL output
010 = FCLK(ARMCLK)
011 = HCLK
100 = PCLK
101 = DCLK0 (Divided PCLK)
110 = OSC To PLL INPUT Clock
111 = Reserved
010
Reserved [3:0] Reserved 0
NOTES:
1. User must set first MISCCR[31] = 1’b1 when use the high speed SPI.
2. We recommend not using this output pad to other device’s pll clock source.
I/O PORTS S3C2450X RISC MICROPROCESSOR
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3.14 DCLK CONTROL REGISTERS (DCLKCON)
Register Address R/W Description Reset Value
DCLKCON 0x56000084 R/W DCLK0/1 control register 0x0
DCLKCON Bit Description
Reserved [31:28] Reserved
DCLK1CMP [27:24] DCLK1 compare value clock toggle value. ( < DCLK1DIV)
If the DCLK1CMP is n, Low level duration is( n + 1),
High level duration is((DCLK1DIV + 1) –( n +1))
DCLK1DIV [23:20] DCLK1 divide value
DCLK1 frequency = source clock /( DCLK1DIV + 1)
DCLK1SelCK [17] Select DCLK1 source clock
0 = PCLK
1 = EPLL
DCLK1EN [16] DCLK1 enable
0 = DCLK1 disable
1 = DCLK1 enable
DCLK0CMP [11:8] DCLK0 compare value clock toggle value.( < DCLK0DIV)
If the DCLK0CMP is n, Low level duration is( n + 1),
High level duration is((DCLK0DIV + 1) –( n +1))
DCLK0DIV [7:4] DCLK0 divide value.
DCLK0 frequency = source clock /( DCLK0DIV + 1)
DCLK0SelCK [1] Select DCLK0 source clock
0 = PCLK
1 = EPLL
DCLK0EN [0] DCLK0 enable
0 = DCLK0 disable
1 = DCLK0 enable
DCLKnDIV + 1
DCLKnCMP + 1
S3C2450X RISC MICROPROCESSOR I/O PORTS
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3.15 EXTINTn (External Interrupt Control Register n)
The 8 external interrupts can be requested by various Signalling methods. The EXTINT register configures the
Signalling method between the level trigger and edge trigger for the external interrupt request, and also configures
the signal polarity.
To recognize the level interrupt, the valid logic level on EXTINTn pin must be retained for 40ns at least because of
the noise filter.
Register Address R/W Description Reset Value
EXTINT0 0x56000088 R/W External interrupt control register 0 0x0
EXTINT1 0x5600008c R/W External interrupt control register 1 0x0
EXTINT2 0x56000090 R/W External interrupt control register 2 0x0
EXTINT0 Bit Description
Reserved [31] Reserved
EINT7 [30:28] Setting the signalling method of the EINT7.
000 = Low level
001 = High level
01x = Falling edge triggered
10x = Rising edge triggered
11x = Both edge triggered
Reserved [27] Reserved
EINT6 [26:24] Setting the
ٛsignalling method of the EINT6.
000 = Low level
001 = High level
01x = Falling edge triggered
10x = Rising edge triggered
11x = Both edge triggered
Reserved [23] Reserved
EINT5 [22:20] Setting the signalling method of the EINT5.
000 = Low level
001 = High level
01x = Falling edge triggered
10x = Rising edge triggered
11x = Both edge triggered
Reserved [19] Reserved
EINT4 [18:16] Setting the signalling method of the EINT4.
000 = Low level
001 = High level
01x = Falling edge triggered
10x = Rising edge triggered
11x = Both edge triggered
Reserved [15] Reserved
I/O PORTS S3C2450X RISC MICROPROCESSOR
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EXTINT0 Bit Description
EINT3 [14:12] Setting the signalling method of the EINT3.
000 = Low level
001 = High level
01x = Falling edge triggered
10x = Rising edge triggered
11x = Both edge triggered
Reserved [11] Reserved
EINT2 [10:8] Setting the signalling method of the EINT2.
000 = Low level
001 = High level
01x = Falling edge triggered
10x = Rising edge triggered
11x = Both edge triggered
Reserved [7] Reserved
EINT1 [6:4] Setting the signalling method of the EINT1.
000 = Low level
001 = High level
01x = Falling edge triggered
10x = Rising edge triggered
11x = Both edge triggered
Reserved [3] Reserved
EINT0 [2:0] Setting the signalling method of the EINT0.
000 = Low level
001 = High level
01x = Falling edge triggered
10x = Rising edge triggered
11x = Both edge triggered
S3C2450X RISC MICROPROCESSOR I/O PORTS
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EXTINT1 Bit Description
Reserved [31] Reserved
EINT15 [30:28] Setting the signaling method of the EINT15.
000 = Low level 001 = High level 01x = Falling edge triggered
10x = Rising edge triggered 11x = Both edge triggered
Reserved [27] Filter enable for EINT14
0 = Filter Enable 1 = Filter Disable
EINT14 [26:24] Setting the signaling method of the EINT14.
000 = Low level 001 = High level 01x = Falling edge triggered
10x = Rising edge triggered 11x = Both edge triggered
Reserved [23] Reserved
EINT13 [22:20] Setting the signaling method of the EINT13.
000 = Low level 001 = High level 01x = Falling edge triggered
10x = Rising edge triggered 11x = Both edge triggered
Reserved [19] Reserved
EINT12 [18:16] Setting the signaling method of the EINT12.
000 = Low level 001 = High level 01x = Falling edge triggered
10x = Rising edge triggered 11x = Both edge triggered
Reserved [15] Reserved
EINT11 [14:12] Setting the signaling method of the EINT11.
000 = Low level 001 = High level 01x = Falling edge triggered
10x = Rising edge triggered 11x = Both edge triggered
Reserved [11] Reserved
EINT10 [10:8] Setting the signaling method of the EINT10.
000 = Low level 001 = High level 01x = Falling edge triggered
10x = Rising edge triggered 11x = Both edge triggered
Reserved [7] Reserved
EINT9 [6:4] Setting the signaling method of the EINT9.
000 = Low level 001 = High level 01x = Falling edge triggered
10x = Rising edge triggered 11x = Both edge triggered
Reserved [3] Reserved
EINT8 [2:0] Setting the signaling method of the EINT8.
000 = Low level 001 = High level 01x = Falling edge triggered
10x = Rising edge triggered 11x = Both edge triggered
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EXTINT2 Bit Description Reset Value
FLTEN23 [31] Filter enable for EINT23
0 = Filter Enable
1 = Filter Disable
0
EINT23 [30:28] Setting the signaling method of the EINT23.
000 = Low level 001 = High level
01x = Falling edge triggered 10x = Rising edge triggered
11x = Both edge triggered
000
FLTEN22 [27] Filter Enable for EINT22
0 = Filter Enable
1 = Filter Disable
0
EINT22 [26:24] Setting the signaling method of the EINT22.
000 = Low level 001 = High level
01x = Falling edge triggered 10x = Rising edge triggered
11x = Both edge triggered
000
FLTEN21 [23] Filter Enable for EINT21
0 = Filter Enable
1 = Filter Disable
0
EINT21 [22:20] Setting the signaling method of the EINT21.
000 = Low level 001 = High level
01x = Falling edge triggered 10x = Rising edge triggered
11x = Both edge triggered
000
FLTEN20 [19] Filter Enable for EINT20
0 = Filter Enable
1 = Filter Disable
0
EINT20 [18:16] Setting the signaling method of the EINT20.
000 = Low level 001 = High level
01x = Falling edge triggered 10x = Rising edge triggered
11x = Both edge triggered
000
FLTEN19 [15] Filter enable for EINT19
0 = Filter Enable
1 = Filter Disable
0
EINT19 [14:12] Setting the signaling method of the EINT19.
000 = Low level 001 = High level
01x = Falling edge triggered 10x = Rising edge triggered
11x = Both edge triggered
000
FLTEN18 [11] Filter enable for EINT18
0 = Filter Enable
1 = Filter Disable
0
EINT18 [10:8] Setting the signaling method of the EINT18.
000 = Low level 001 = High level
01x = Falling edge triggered 10x = Rising edge triggered
11x = Both edge triggered
000
S3C2450X RISC MICROPROCESSOR I/O PORTS
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EXTINT2 Bit Description Reset Value
FLTEN17 [7] Filter enable for EINT17
0 = Filter Enable 1 = Filter Disable 0
EINT17 [6:4] Setting the signalling method of the EINT17.
000 = Low level 001 = High level
01x = Falling edge triggered 10x = Rising edge triggered
11x = Both edge triggered
000
FLTEN16 [3] Filter enable for EINT16
0 = Filter Enable 1 = Filter Disable 0
EINT16 [2:0] Setting the
ٛsignalling method of the EINT16.
000 = Low level 001 = High level
01x = Falling edge triggered 10x = Rising edge triggered
11x = Both edge triggered
000
I/O PORTS S3C2450X RISC MICROPROCESSOR
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3.16 EINTFLTn (External Interrupt Filter Register n)
To recognize the level interrupt, the valid logic level on EXTINTn pin must be retained for 40ns at least because of
the noise filter.
Register Address R/W Description Reset Value
EINTFLT0 0x56000094 R/W Reserved 0x0
EINTFLT1 0x56000098 R/W Reserved 0x0
EINTFLT2 0x5600009c R/W External interrupt control register 2 0x0
EINTFLT3 0x4c6000a0 R/W External interrupt control register 3 0x0
EINTFLT2 Bit Description
FLTCLK19 [31] Filter clock of EINT19 (configured by OM)
0 = PCLK 1 = EXTCLK/OSC_CLK
EINTFLT19 [30:24] Filtering width of EINT19
FLTCLK18 [23] Filter clock of EINT18 (configured by OM)
0 = PCLK 1 = EXTCLK/OSC_CLK
EINTFLT18 [22:16] Filtering width of EINT18
FLTCLK17 [15] Filter clock of EINT17 (configured by OM)
0 = PCLK 1 = EXTCLK/OSC_CLK
EINTFLT17 [14:8] Filtering width of EINT17
FLTCLK16 [7] Filter clock of EINT16 (configured by OM)
0 = PCLK 1 = EXTCLK/OSC_CLK
EINTFLT16 [6:0] Filtering width of EINT16
EINTFLT3 Bit Description
FLTCLK23 [31] Filter clock of EINT23 (configured by OM)
0 = PCLK 1 = EXTCLK/OSC_CLK
EINTFLT23 [30:24] Filtering width of EINT23
FLTCLK22 [23] Filter clock of EINT22 (configured by OM)
0 = PCLK 1 = EXTCLK/OSC_CLK
EINTFLT22 [22:16] Filtering width of EINT22
FLTCLK21 [15] Filter clock of EINT21(configured by OM)
0 = PCLK 1 = EXTCLK/OSC_CLK
EINTFLT21 [14:8] Filtering width of EINT21
FLTCLK20 [7] Filter clock of EINT20 (configured by OM)
0 = PCLK 1 = EXTCLK/OSC_CLK
EINTFLT20 [6:0] Filtering width of EINT20
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-41
3.17 EINTMASK (External Interrupt Mask Register)
Register Address R/W Description Reset Value
EINTMASK 0x560000a4 R/W External interrupt mask register 0x00fffff0
EINTMASK Bit Description
Reserved [31:24] Reserved
EINT23 [23] 0 = enable interrupt 1 = masked
EINT22 [22] 0 = enable interrupt 1 = masked
EINT21 [21] 0 = enable interrupt 1 = masked
EINT20 [20] 0 = enable interrupt 1 = masked
EINT19 [19] 0 = enable interrupt 1 = masked
EINT18 [18] 0 = enable interrupt 1 = masked
EINT17 [17] 0 = enable interrupt 1 = masked
EINT16 [16] 0 = enable interrupt 1 = masked
EINT15 [15] 0 = enable interrupt 1 = masked
EINT14 [14] 0 = enable interrupt 1 = masked
EINT13 [13] 0 = enable interrupt 1 = masked
EINT12 [12] 0 = enable interrupt 1 = masked
EINT11 [11] 0 = enable interrupt 1 = masked
EINT10 [10] 0 = enable interrupt 1 = masked
EINT9 [9] 0 = enable interrupt 1 = masked
EINT8 [8] 0 = enable interrupt 1 = masked
EINT7 [7] 0 = enable interrupt 1 = masked
EINT6 [6] 0 = enable interrupt 1 = masked
EINT5 [5] 0 = enable interrupt 1 = masked
EINT4 [4] 0 = enable interrupt 1 = masked
Reserved [3:0] Reserved
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-42
3.18 EINTPEND (External Interrupt Pending Register)
Register Address R/W Description Reset Value
EINTPEND 0x560000a8 R/W External interrupt pending register 0x0
EINTPEND Bit Description Reset Value
Reserved [31:24] Reserved 0x0
EINT23 [23] It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT22 [22]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT21 [21]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT20 [20]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT19 [19]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT18 [18]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT17 [17]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT16 [16]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT15 [15] It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT14 [14]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT13 [13]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT12 [12]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT11 [11]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT10 [10]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT9 [9] It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT8 [8] It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT7 [7] It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT6 [6]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT5 [5]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
EINT4 [4]
It is cleared by writing “1”
0 = Not occur 1 = Occur interrupt 0
Reserved [3:0] Reserved 0x0
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-43
3.19 GSTATUSn (General Status Registers)
Register Address R/W Description Reset Value
GSTATUS0 0x560000ac R External pin status Not define
GSTATUS1 0x560000b0 R Device ID 0x32450001
GSTATUS0 Bit Description
Reserved [31:4] Reserved
nWAIT [3] Status of nWAIT pin
NCON [2] Status of NCON pin
RnB [1] Status of RnB pin
BATT_FLT [0] Status of BATT_FLT pin
GSTATUS1 Bit Description
Software
Platform ID [31:0] Software Platform ID register = 0x32450003
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-44
3.20 DSCn (Drive Strength Control)
Control the Memory I/O drive strength
Register Address R/W Description Reset Value
DSC0 0x560000c0 R/W Strength control register 0 0x2aaa_aaaa
DSC1 0x560000c4 R/W Strength control register 1 0xaaa_aaaa
DSC2 0x560000c8 R/W Strength control register 2 0xaa8_aaaa
DSC3 0x56000110 R/W Strength control register 3 0x2aa
DSC0 Bit Description Reset Value
Reserved [31:30] Reserved 0x0
DSC_CF [29:28] nWE_CF, nOE_CF Drive strength
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_nRBE [27:26] 10
DSC_nROE [25:24] 10
DSC_nRWE [23:22]
nRBE, nROE, nRWE Drive strength
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA 10
DSC_nRCS5 [21:20] 10
DSC_nRCS4 [19:18] 10
DSC_nRCS3 [17:16] 10
DSC_nRCS2 [15:14] 10
DSC_nRCS1 [13:12] 10
DSC_nRCS0 [11:10]
nRCS5 ~ nRCS0 Address Bus Drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_RADDRH [9:8] ROM Address Bus[25:16] Drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_RADDRL [7:6] ROM Address Bus[15:1] Drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_RADDR0 [5:4] ROM Address Bus[0] Drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_RDATA1 [3:2] ROM DATA[15:8] I/O Drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_RDATA0 [1:0] ROM DATA[7:0] I/O Drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-45
DSC1 Bit Description Reset Value
Reserved [31:28] Reserved 0x0
DSC_nSCLK [27:26] nSCLK drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_SCLK [25:24] SCLK drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_SCKE [23:22] SCKE Drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
Reserved [21:20] Reserved 10
DSC_nSWE [19:18] nSWE drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_nSCAS [17:16] nSCAS drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_nSRAS [15:14] nSRAS drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_nSCS1 [13:12] nSCS1 drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_nSCS0 [11:10] nSCS0 drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_SADDR [9:8] SADDR drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_SDATA3 [7:6] SDATA[31:24] drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_SDATA2 [5:4] SDATA[23:16] drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_SDATA1 [3:2] SDATA[15:8] drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_SDATA0 [1:0] SDATA[7:0] drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-46
DSC2 Bit Description Reset Value
Reserved [31:28] Reserved 0x0
DSC_nFCE [27:26] nFCE drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_nFRE [25:24] nFRE drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_nFWE [23:22] nFWE Drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_ALE [21:20] ALE drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_CLE [19:18] CLE drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
Reserved [17:16] Reserved 00
DSC_RSMAVD [15:14] RSMAVD drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_RSMCLK [13:12] RSMCLK drive strength.
00 = 5.2mA 01 = 10.5mA
10 = 15.7mA 11 = 21.0mA
10
DSC_DQM3 [11:10] DQM3 drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_DQM2 [9:8] DQM2 drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_DQM1 [7:6] DQM1 drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_DQM0 [5:4] DQM0 drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_DQS1 [3:2] DQS1 drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
DSC_DQS0 [1:0] DQS0 drive strength.
00 = 4.9mA 01 = 9.8mA
10 = 14.8mA 11 = 19.7mA
10
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-47
DSC3 Bit Description Reset Value
Reserved [31:10] Reserved 0x0
DSC_LCD2 [9:8] LCD_VD[23:16] drive strength.
00 = 2.6mA 01 = 5.2mA
10 = 7.8mA 11 = 10.5mA
10
DSC_LCD1 [7:6] LCD_VD[15:8] drive strength.
00 = 2.6mA 01 = 5.2mA
10 = 7.8mA 11 = 10.5mA
10
DSC_LCD0 [5:4] LCD_VD[7:0] drive strength.
00 = 2.6mA 01 = 5.2mA
10 = 7.8mA 11 = 10.5mA
10
DSC_HS_MMC [3:2] HS_MMC drive strength.
00 = 2.6mA 01 = 5.2mA
10 = 7.8mA 11 = 10.5mA
10
DSC_HS_SPI [1:0] HS_SPI drive strength.
00 = 2.6mA 01 = 5.2mA
10 = 7.8mA 11 = 10.5mA
10
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-48
3.21 PDDMCON (Power Down SDRAM Control Register)
Register Address R/W Description Reset Value
PDDMCON 0x56000114 R/W Memory I/F control register 0x00411540
PDDMCON Bit Description Reset Value
Reserved [31:24] Reserved 0x0
PSC_nSCLK [23:22]
nSCLK pin status (inactive :”1” )
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_SCK [21:20]
SCLK,SCKE pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_DQMH [19:18]
DQM[3:2]/GPA[26:25] pin status,
(inactive : DQM[3:2] = “00”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_DQML [17:16]
DQM[1:0] pin status, (inactive : DQM[1:0] = “11”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_DQS [15:14]
DQS[1:0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_nSWE [13:12]
nSWE pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_SDR [11:10]
nSCAS, nSRAS pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_nSCS1 [9:8]
nSCS1 pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_nSCS0 [7:6]
nSCS0 pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_SDATAH [5:4]
SDATA[31:16]/GPK[15:0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_SDATAL [3:2]
SDATA[15:0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_SADDR [1:0]
SADDR[15:0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-49
3.22 PDSMCON (Power Down SRAM Control Register)
Register Address R/W Description Reset Value
PDSMCON 0x56000118 R/W Memory I/F control register 0x05451500
PDSMCON Bit Description Reset Value
Reserved [31:28] Reserved 0x0
PSC_CF1 [27:26] nOE_CF/GPA[11], nWE_CF/GPA[27] (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
Reserved [25:24] Reserved 01
PSC_NF1 [23:22] nFCE/GPA[22], nFRE/GPA[20], nFWE/GPA[19] pin
status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_NF0 [21:20] ALC/GPA18, CLE/GPA17 pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_nRWE [19:18] nRWE pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_nROE [17:16] nROE pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_RSM [15:14] RSMCLK/GPA23,RSMAVD/GPA24 pin status
(inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_nRBE [13:12] nRBE[1:0] pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_nRCS51 [11:10] nRCS[5:1]/GPA[16:12] pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_nRCS0 [9:8] nRCS0 pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_RDATA [7:6] RDATA[15:0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-50
PDSMCON Bit Description Reset Value
PSC_RADDRH [5:4] RADDR[25:16]/GPA[GPA10:1] pin status
(inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_RADDRL [3:2]
RADDR[15:1] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_RADDR0 [1:0]
RADDR[0]/GPA[0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
S3C2450X RISC MICROPROCESSOR I/O PORTS
11-51
4 GPIO ALIVE & SLEEP PART
Alive Sleep
PAD GPF[7:0], GPG[7:0] GPA, GPB, GPC, GPD, GPE, GPG[15:8],
GPH, GPJ, GPK, GPL ,GPM
SFR GPACON[27;0], GPADAT[27:0]
GPFCON[15;0], GPFDAT[7:0], GPFUDP[15:0]
GPGCONL[15:0], GPGDATL[7:0], GPGUDPL[15:0]
GPKCON[31:0], GPKDAT[15:0], GPKUDP[31:0]
EXTINT0[31:0], EXINT1[31:0]
PDDMCON, PDSMCON
All registers except alive SFR
GP*CON, GP*DAT, GP*UDP
I/O PORTS S3C2450X RISC MICROPROCESSOR
11-52
NOTES
S3C2450X RISC MICROPROCESSOR WATCHDOG TIMER
12-1
12 WATCHDOG TIMER
1 OVERVIEW
The S3C2450 watchdog timer is used to resume the controller operation whenever it is disturbed by malfunctions
such as noise and system errors. The watchdog timer generates the reset signal. It can be used as a normal 16-
bit interval timer to request interrupt service.
Advantage in using WDT instead of PWM timer is that WDT generates the reset signal.
1.1 FEATURES
The Watchdog Timer includes the following features:
• Normal interval timer mode with interrupt request
• Internal reset signal is activated for 128 PCLK cycles when the timer count value reaches 0 (time-out).
WATCHDOG TIMER S3C2450X RISC MICROPROCESSOR
12-2
2 WATCHDOG TIMER OPERATION
2.1 BLOCK DIAGRAM
Figure 12-1 shows the functional block diagram of the watchdog timer. The watchdog timer uses only PCLK as its
source clock. The PCLK frequency is prescaled to generate the corresponding watchdog timer clock, and the
resulting frequency is divided again.
Reset Signal Generator
WTCNT
(Down Counter)
PCLK
WTCON[4:3]
WTDAT
RESE
T
1/16
1/32
1/64
1/128
8-bit Prescaler
WTCON[15:8] WTCON[2] WTCON[0]
Interrupt
MUX
Figure 12-1. Watchdog Timer Block Diagram
The prescaler value and the frequency division factor are specified in the watchdog timer control (WTCON)
register. Valid prescaler values range from 0 to 28-1. The frequency division factor can be selected as 16, 32, 64,
or 128.
Use the following equation to calculate the watchdog timer clock frequency and the duration of each timer clock
cycle:
t_watchdog = 1 / [ PCLK / (Prescaler value + 1) / Division_factor ]
2.2 WTDAT & WTCNT
Watchdog Timer operation based on the value of watchdog timer count (WTCNT) register. Once timer is
operated, count value will be down counting from the initial value of WTCNT register. During the watchdog timer
operation, it contains the current count values.
The value of WDTAT register will be automatically reloaded into WTCNT at every time-out, if watchdog timer is
used for the normal timer.
NOTE
At initial watchdog timer operation(of enable), the value of watchdog timer data (WTDAT) register is not
automatically loaded into the timer counter (WTCNT). An initial value MUST be written to the watchdog
timer count (WTCNT) register, before the watchdog timer starts.
S3C2450X RISC MICROPROCESSOR WATCHDOG TIMER
12-3
2.3 CONSIDERATION OF DEBUGGING ENVIRONMENT
When the S3C2450 is in debug mode using Embedded ICE, the watchdog timer must not operate.
The watchdog timer can determine whether or not it is currently in the debug mode from the CPU core signal
(DBGACK signal). Once the DBGACK signal in CPU core is asserted, the reset output of the watchdog timer is
not activated as the watchdog timer is expired.
WATCHDOG TIMER S3C2450X RISC MICROPROCESSOR
12-4
3 WATCHDOG TIMER SPECIAL REGISTERS
3.1 WATCHDOG TIMER CONTROL (WTCON) REGISTER
The WTCON register allows the user to enable/disable the watchdog timer, select the clock signal from 4 different
sources, enable/disable interrupts, and enable/disable the watchdog timer output.
The Watchdog timer is used to resume the S3C2450 restart on malfunction after its power on. At this time,
disable the interrupt generation and enable the Watchdog timer output for reset signal.
If controller restart is not desired and if the user wants to use the normal timer only, which is provided by the
Watchdog timer, enable the interrupt generation and disable the Watchdog timer output for reset signal.
Register Address R/W Description Reset Value
WTCON 0x53000000 R/W Watchdog timer control register 0x8021
WTCON Bit Description Initial State
Prescaler value [15:8] Prescaler value.
The valid range is from 0 to 255(28-1). 0x80
Reserved [7:6] Reserved.
These two bits must be 00 in normal operation. 00
Watchdog timer [5] Enable or disable bit of Watchdog timer.
0 = Disable
1 = Enable
1
Clock select [4:3] Determine the clock division factor.
00 = 16
01 = 32
10 = 64
11 = 128
00
Interrupt
generation [2] Enable or disable bit of the interrupt.
0 = Disable
1 = Enable
0
Reserved [1] Reserved.
This bit must be 0 in normal operation. 0
Reset
enable/disable [0] Enable or disable bit of Watchdog timer output for reset signal.
1 = Assert reset signal of the S3C2450 at watchdog time-out
0 = Disable the reset function of the watchdog timer.
1
NOTE: Initial state of ‘Reset enable/disable’ is 1(reset enable). If user do not disable this bit, S3C2450 will be rebooted in
about 5.63sec (In the case of PCLK is 12MHz). So at boot loader, this bit should be disabled before under control of
Operating System, or Firmware.
S3C2450X RISC MICROPROCESSOR WATCHDOG TIMER
12-5
3.2 WATCHDOG TIMER DATA (WTDAT) REGISTER
The WTDAT register is used to specify the time-out duration. The content of WTDAT cannot be automatically
loaded into the timer counter at initial watchdog timer operation. However, using 0x8000 (initial value) will drive
the first time-out. In this case, the value of WTDAT will be automatically reloaded into WTCNT.
Register Address R/W Description Reset Value
WTDAT 0x53000004 R/W Watchdog timer data register 0x8000
WTDAT Bit Description Initial State
Count reload
value [15:0] Watchdog timer count value for reload. 0x8000
3.3 WATCHDOG TIMER COUNT (WTCNT) REGISTER
The WTCNT register contains the current count values for the watchdog timer during normal operation.
Note that the content of the WTDAT register cannot be automatically loaded into the timer count register when
the watchdog timer is enabled initially, so the WTCNT register must be set to an initial value before enabling it.
Register Address R/W Description Reset Value
WTCNT 0x53000008 R/W Watchdog timer count register 0x8000
WTCNT Bit Description Initial State
Count value [15:0] The current count value of the watchdog timer 0x8000
WATCHDOG TIMER S3C2450X RISC MICROPROCESSOR
12-6
NOTES
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-1
13 PWM TIMER
1 OVERVIEW
The S3C2450 has five 16-bit timers. Timer 0, 1, 2, and 3 have Pulse Width Modulation (PWM) function. Timer 4
has an internal timer only with no output pins. The timer 0 has a dead-zone generator, which is used with a large
current device.
The timer 0 and 1 share an 8-bit prescaler, while the timer 2, 3 and 4 share other 8-bit prescaler. Each timer has a
clock divider, which generates 5 different divided signals (1/2, 1/4, 1/8, 1/16, and TCLK). Each timer block
receives its own clock signals from the clock divider, which receives the clock from the corresponding 8-bit
prescaler. The 8-bit prescaler is programmable and divides the PCLK according to the loading value, which is
stored in TCFG0 and TCFG1 registers.
The timer count buffer register (TCNTBn) has an initial value, which is loaded into the internal down-counter when
the timer is enabled. The timer compare buffer register (TCMPBn) has an initial value, which is loaded into the
internal compare register to be compared with the internal down-counter value. This double buffering feature of
TCNTBn and TCMPBn makes the timer generate a stable output when the frequency and duty ratio are changed.
Each timer has its own 16-bit internal down counter, which is driven by the timer clock. When the internal down-
counter reaches zero, the timer interrupt request is generated to inform the CPU that the timer operation has been
completed. When the timer internal down-counter reaches zero, the value of corresponding TCNTBn is
automatically loaded into the internal down-counter to continue the next operation. However, if the timer stops, for
example, by clearing the timer enable bit of TCONn during the timer running mode, the value of TCNTBn will not
be reloaded into the internal down-counter.
The value of TCMPBn is used for pulse width modulation (PWM). The timer control logic changes the output level
when the internal down-counter value matches the value of the internal compare register in the timer control logic.
Therefore, the internal compare register determines the turn-on time (or turn-off time) of a PWM output.
1.1 FEATURE
• Five 16-bit timers
• Two 8-bit prescalers & Two 4-bit divider
• Programmable duty control of output waveform (PWM)
• Auto reload mode or one-shot pulse mode
• Dead-zone generator
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-2
Clock
Divider
TOUT0
TOUT1
TOUT2
Clock
Divider
No Pin
PCLK
8-Bit
Prescaler
1/4
1/8
1/16
TCLK
1/2
8-Bit
Prescaler
1/4
1/8
1/16
TCLK
1/2
5:1 MUX
TCMPB0 TCNTB0
Control
Logic0
Dead Zone
Generator
Dead Zone
TCMPB1 TCNTB1
Control
Logic1
Dead Zone
5:1 MUX5:1 MUX
Control
Logic2
TCMPB2 TCNTB2
5:1 MUX5:1 MUX
TCMPB3 TCNTB3
Control
Logic3
TOUT3
TCNTB4
Control
Logic4
Figure 13-1. 16-bit PWM Timer Block Diagram
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-3
2 PWM TIMER OPERATION
2.1 PRESCALER & DIVIDER
An 8-bit prescaler and a 4-bit divider make the following output frequencies:
4-bit Divider
Settings Minimum Resolution
(prescaler = 0) Maximum Resolution
(prescaler = 255) Min. Interval
(TCNTBn = 1) Max. Interval
(TCNTBn = 65535)
1/2 (PCLK = 50 MHz) 0.0400 us (25.000 MHz) 10.2400 us (97.6562 kHz) 0.0800 us 0.6710 sec
1/4 (PCLK = 50 MHz) 0.0800 us (12.500 MHz) 20.4800 us (48.8281 kHz) 0.1600 us 1.3421 sec
1/8 (PCLK = 50 MHz) 0.1600 us ( 6.250 MHz) 40.9601 us (24.4140 kHz) 0.3200 us 2.6843 sec
1/16 (PCLK = 50 MHz) 0.3200 us ( 3.125 MHz) 81.9188 us (12.2070 kHz) 0.6400 us 5.3686 sec
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-4
2.2 BASIC TIMER OPERATION
Figure 13-2. Timer Operations
A timer (except the timer ch-4) has TCNTBn, TCNTn, TCMPBn and TCMPn. The TCNTBn and the TCMPBn are
loaded into the TCNTn and the TCMPn when the timer reaches 0.
When the TCNTn reaches 0, an interrupt request will occur if the interrupt is enabled.
NOTE
TCNTn and TCMPn are the names of the internal registers. (16bit Internal down-counter (register) and
16bit internal compare register, respectively.) The TCNTn register can be read from the TCNTOn register
If you want to generate interrupt at intervals 3cycle of TOUTn, set TCNTBn, TCMPBn and TCON register like
Figure 13-2. That is :
i) Set TCNTBn=3 and TCMPBn=1.
ii) Set auto-reload=1 and manual update=1.
When manual update bit is 1, TCNTBn and TCMPBn value are loaded to TCNTn and TCMPn.
iii) Set TCNTBn=2 and TCMPBn=0 for next operation.
iv) Set auto-reload=1 and manual update=0.
If you set manual update=1 at this time, TCNTn is changed to 2 and TCMP is changed to 0.
So, interrupt is generated at interval 2cycle instead of 3cycle.
You must set auto-reload=1 automatically for next operation.
v) Set start = 1 for operation start and then TCNTn is down counting.
When TCNTn is 0, interrupt is generated and If auto-reload is enable, TCNTn is loaded 2
(TCNTBn value) and TCMPn is loade 0(TCMPn value).
vi) Before stop, TCNTn is down counting.
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-5
2.3 AUTO RELOAD & DOUBLE BUFFERING
S3C2450 PWM Timers have a double buffering function, enabling the reload value changed for the next timer
operation without stopping the current timer operation. So, although the new timer value is set, a current timer
operation is completed successfully.
The timer value can be written into Timer Count Buffer register (TCNTBn) and the current counter value of the
timer can be read from Timer Count Observation register (TCNTOn). If the TCNTBn is read, the read value does
not indicate the current state of the counter but the reload value for the next timer duration.
The auto-reload operation copies the TCNTBn into TCNTn when the TCNTn reaches 0. The value, written into the
TCNTBn, is loaded to the TCNTn only when the TCNTn reaches 0 and auto reload is enabled. If the TCNTn
becomes 0 and the auto reload bit is 0, the TCNTn does not operate any further.
Write
TCNTBn = 100
Write
TCNTBn = 200
Start
TCNTBn = 150
Auto-reload
150 100 100 200
Interrupt
Write
TCNTBn = 100
Write
TCNTBn = 200
Start
TCNTBn = 150
Auto-reload
150 100 100 200
Interrupt
Figure 13-3. Example of Double Buffering Function
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-6
2.4 TIMER INITIALIZATION USING MANUAL UPDATE BIT AND INVERTER BIT
An auto reload operation of the timer occurs when the internal down-counter(TCNTn) reaches 0. So, a starting
value of the TCNTn has to be defined by the user in advance. In this case, the starting value has to be loaded by
the manual update bit. The following steps describe how to start a timer:
1. Write the initial value into TCNTBn and TCMPBn.
2. Set the manual update bit of the corresponding timer. It is recommended that you configure the inverter on/off
bit. (Whether use inverter or not).
3. Set start bit of the corresponding timer to start the timer (and clear the manual update bit, configure the
inverter on/off bit as you want).
If the timer is stopped by force, the TCNTn retains the counter value and is not reloaded from TCNTBn. If a new
value has to be set, perform manual update.
NOTE
Whenever TOUT inverter on/off bit is changed, the TOUTn logic value will also be changed whether the
timer runs. Therefore, it is desirable that the inverter on/off bit is configured with the manual update bit.
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-7
2.5 TIMER OPERATION
TOUTn
12 46
50 110 4040 6020
379 10
5 8 11
Figure 13-4. Example of a Timer Operation
The above Figure 13-4 shows the result of the following procedure:
1. Enable the auto re-load function. Set the TCNTBn to 160 (50+110) and the TCMPBn to 110. Set the manual
update bit and configure the inverter bit (on/off). The manual update bit sets TCNTn and TCMPn to the values
of TCNTBn and TCMPBn, respectively.
And then, set the TCNTBn and the TCMPBn to 80 (40+40) and 40, respectively, to determine the next reload
value.
2. Set the start bit, provided that manual_update is 0 and the inverter is off and auto reload is on. The timer
starts counting down after latency time within the timer resolution.
3. When the TCNTn has the same value as that of the TCMPn, the logic level of the TOUTn is changed from low
to high.
4. When the TCNTn reaches 0, the interrupt request is generated and TCNTBn value is loaded into a temporary
register. At the next timer tick, the TCNTn is reloaded with the temporary register value (TCNTBn).
5. In Interrupt Service Routine (ISR), the TCNTBn and the TCMPBn are set to 80 (20+60) and 60, respectively,
for the next duration.
6. When the TCNTn has the same value as the TCMPn, the logic level of TOUTn is changed from low to high.
7. When the TCNTn reaches 0, the TCNTn is reloaded automatically with the TCNTBn, triggering an interrupt
request.
8. In Interrupt Service Routine (ISR), auto reload and interrupt request are disabled to stop the timer.
9. When the value of the TCNTn is same as the TCMPn, the logic level of the TOUTn is changed from low to
high.
10. Even when the TCNTn reaches 0, the TCNTn is not any more reloaded and the timer is stopped because
auto reload has been disabled.
11. No more interrupt requests are generated.
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-8
2.6 PULSE WIDTH MODULATION (PWM)
Write
TCMPBn = 60
Write
TCMPBn = 50
Write
TCMPBn = 40
Write
TCMPBn = 30
Write
TCMPBn = 30
Write
TCMPBn = Next PWM Value
60 50 40 30 30
Figure 13-5. Example of PWM
PWM function can be implemented by using the TCMPBn. PWM frequency is determined by TCNTBn. Figure 13-
5 shows a PWM value determined by TCMPBn.
For a higher PWM value, decrease the TCMPBn value. For a lower PWM value, increase the TCMPBn value. If
an output inverter is enabled, the increment/decrement may be reversed.
The double buffering function allows the TCMPBn, for the next PWM cycle, written at any point in the current
PWM cycle by ISR or other routine.
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-9
2.7 OUTPUT LEVEL CONTROL
Inverter off
Initial State Period 1 Period 2 Timer Stop
Inverter on
Figure 13-6. Inverter On/Off
The following procedure describes how to maintain TOUT as high or low (assume the inverter is off):
1. Turn off the auto reload bit. And then, the timer is stopped after the TCNTn reaches 0, TOUTn goes to high
level (recommended).
2. Stop the timer by clearing the timer start/stop bit to 0. If TCNTn ≤ TCMPn at that moment, the output level is
high. If TCNTn >TCMPn, the output level is low.
3. The TOUTn can be inverted by the inverter on/off bit in TCON. The inverter removes the additional circuit to
adjust the output level.
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-10
2.8 DEAD ZONE GENERATOR
The Dead Zone is for the PWM control in a power device. This function enables the insertion of the time gap
between a turn-off of a switching device and a turn on of another switching device. This time gap prohibits the two
switching devices from being turned on simultaneously, even for a very short time.
TOUT0 is the PWM output. nTOUT0 is the inversion of the TOUT0. If the dead zone is enabled, the output wave
form of TOUT0 and nTOUT0 will be TOUT0_DZ and nTOUT0_DZ, respectively. nTOUT0_DZ is routed to the
TOUT1 pin.
In the dead zone interval, TOUT0_DZ and nTOUT0_DZ can never be turned on simultaneously.
TOUT0
nTOUT0
TOUT0_DZ
nTOUT0_DZ
Deadzone
Interval
Figure 13-7. The Wave Form When a Dead Zone Feature is Enabled
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-11
2.9 DMA REQUEST MODE
The PWM timer can generate a DMA request at every specific time. The timer keeps DMA request signals
(nDMA_REQ) low until the timer receives an ACK signal. When the timer receives the ACK signal, it makes the
request signal inactive. The timer, which generates the DMA request, is determined by setting DMA mode bits (in
TCFG1 register). If one of timers is configured as DMA request mode, that timer does not generate an interrupt
request. The others can generate interrupt normally.
DMA mode configuration and DMA / interrupt operation
DMA Mode DMA Request Timer0 INT Timer1 INT Timer2 INT Timer3 INT Timer4 INT
0000 No select ON ON ON ON ON
0001 Timer0 OFF ON ON ON ON
0010 Timer1 ON OFF ON ON ON
0011 Timer2 ON ON OFF ON ON
0100 Timer3 ON ON ON OFF ON
0101 Timer4 ON ON ON ON OFF
0110 No select ON ON ON ON ON
PCLK
INT4tmp
DMAreq_en
nDMA_ACK
nDMA_REQ
INT4
1 0 1
Figure 13-8. Timer4 DMA Mode Operation
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-12
3 PWM TIMER CONTROL REGISTERS
3.1 TIMER CONFIGURATION REGISTER0 (TCFG0)
Timer input clock Frequency = PCLK / {prescaler value+1} / {divider value}
{prescaler value} = 0~255
{divider value} = 2, 4, 8, 16
Register Address R/W Description Reset Value
TCFG0 0x51000000 R/W Configures the two 8-bit prescalers 0x00000000
TCFG0 Bit Description Initial State
Reserved [31:24] 0x00
Dead zone
length
[23:16] These 8 bits determine the dead zone length. The 1 unit
time of the dead zone length is equal to that of timer 0.
0x00
Prescaler 1 [15:8] These 8 bits determine prescaler value for Timer 2, 3 and 4. 0x00
Prescaler 0 [7:0] These 8 bits determine prescaler value for Timer 0 and 1. 0x00
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-13
3.2 TIMER CONFIGURATION REGISTER1 (TCFG1)
Register Address R/W Description Reset Value
TCFG1 0x51000004 R/W 5-MUX & DMA mode selection register 0x00000000
TCFG1 Bit Description Initial State
Reserved [31:24] 00000000
DMA mode [23:20] Select DMA request channel
0000 = No select (all interrupt) 0001 = Timer0
0010 = Timer1 0011 = Timer2
0100 = Timer3 0101 = Timer4
0110 = Reserved
0000
MUX 4 [19:16] Select MUX input for PWM Timer4.
0000 = 1/2 0001 = 1/4 0010 = 1/8
0011 = 1/16 01xx = External TCLK
0000
MUX 3 [15:12] Select MUX input for PWM Timer3.
0000 = 1/2 0001 = 1/4 0010 = 1/8
0011 = 1/16 01xx = External TCLK
0000
MUX 2 [11:8] Select MUX input for PWM Timer2.
0000 = 1/2 0001 = 1/4 0010 = 1/8
0011 = 1/16 01xx = External TCLK
0000
MUX 1 [7:4] Select MUX input for PWM Timer1.
0000 = 1/2 0001 = 1/4 0010 = 1/8
0011 = 1/16 01xx = External TCLK
0000
MUX 0 [3:0] Select MUX input for PWM Timer0.
0000 = 1/2 0001 = 1/4 0010 = 1/8
0011 = 1/16 01xx = External TCLK
0000
Notice) When you use External TCLK, duty of TOUT may show slight error. External TCLK is sampled by PCLK in
PWM module. But External TCLK and PCLK is asynchronous clock. So External TCLK may not be sampled at
exact time. This slight error can be reduced when External clock is slower than PCLK. So we recommend using
External PCLK under 1MHz.
(Ex. When PCLK is 66MHz and External PCLK is 1MHz, duty or jitter error can be 1.5%. When PCLK is 66MHz
and External PCLK is 0.5MHz, duty or jitter error can be 0.75%)
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-14
3.3 TIMER CONTROL (TCON) REGISTER
Register Address R/W Description Reset Value
TCON 0x51000008 R/W Timer control register 0x00000000
TCON Bit Description Initial state
Timer 4 auto reload
on/off
[22] Determine auto reload on/off for Timer 4.
0 = One-shot 1 = Interval mode (auto reload)
0
Timer 4 manual
update (note)
[21] Determine the manual update for Timer 4.
0 = No operation 1 = Update TCNTB4
0
Timer 4 start/stop [20] Determine start/stop for Timer 4.
0 = Stop 1 = Start for Timer 4
0
Timer 3 auto reload
on/off
[19] Determine auto reload on/off for Timer 3.
0 = One-shot 1 = Interval mode (auto reload)
0
Timer 3 output
inverter on/off
[18] Determine output inverter on/off for Timer 3.
0 = Inverter off 1 = Inverter on for TOUT3
0
Timer 3 manual
update (note)
[17] Determine manual update for Timer 3.
0 = No operation 1 = Update TCNTB3 & TCMPB3
0
Timer 3 start/stop [16] Determine start/stop for Timer 3.
0 = Stop 1 = Start for Timer 3
0
Timer 2 auto reload
on/off
[15] Determine auto reload on/off for Timer 2.
0 = One-shot 1 = Interval mode (auto reload)
0
Timer 2 output
inverter on/off
[14] Determine output inverter on/off for Timer 2.
0 = Inverter off 1 = Inverter on for TOUT2
0
Timer 2 manual
update (note)
[13] Determine the manual update for Timer 2.
0 = No operation 1 = Update TCNTB2 & TCMPB2
0
Timer 2 start/stop [12] Determine start/stop for Timer 2.
0 = Stop 1 = Start for Timer 2
0
Timer 1 auto reload
on/off
[11] Determine the auto reload on/off for Timer1.
0 = One-shot 1 = Interval mode (auto reload)
0
Timer 1 output
inverter on/off
[10] Determine the output inverter on/off for Timer1.
0 = Inverter off 1 = Inverter on for TOUT1
0
Timer 1 manual
update (note)
[9] Determine the manual update for Timer 1.
0 = No operation 1 = Update TCNTB1 & TCMPB1
0
Timer 1 start/stop [8] Determine start/stop for Timer 1.
0 = Stop 1 = Start for Timer 1
0
NOTE: The bits have to be cleared at next writing.
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-15
TCON Bit Description Initial state
Reserved [7:5] Reserved
Dead zone enable [4] Determine the dead zone operation.
0 = Disable 1 = Enable
0
Timer 0 auto reload
on/off
[3] Determine auto reload on/off for Timer 0.
0 = One-shot 1 = Interval mode(auto reload)
0
Timer 0 output
inverter on/off
[2] Determine the output inverter on/off for Timer 0.
0 = Inverter off 1 = Inverter on for TOUT0
0
Timer 0 manual
update (note)
[1] Determine the manual update for Timer 0.
0 = No operation 1 = Update TCNTB0 & TCMPB0
0
Timer 0 start/stop [0] Determine start/stop for Timer 0.
0 = Stop 1 = Start for Timer 0
0
NOTE: The bit has to be cleared at next writing.
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-16
3.4 TIMER 0 COUNT BUFFER REGISTER & COMPARE BUFFER REGISTER (TCNTB0/TCMPB0)
Register Address R/W Description Reset Value
TCNTB0 0x5100000C R/W Timer 0 count buffer register 0x00000000
TCMPB0 0x51000010 R/W Timer 0 compare buffer register 0x00000000
TCMPB0 Bit Description Initial State
Timer 0 compare buffer register [15:0] Set compare buffer value for Timer 0 0x00000000
TCNTB0 Bit Description Initial State
Timer 0 count buffer register [15:0] Set count buffer value for Timer 0 0x00000000
3.5 TIMER 0 COUNT OBSERVATION REGISTER (TCNTO0)
Register Address R/W Description Reset Value
TCNTO0 0x51000014 R Timer 0 count observation register 0x00000000
TCNTO0 Bit Description Initial State
Timer 0 observation register [15:0] Set count observation value for Timer 0 0x00000000
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-17
3.6 TIMER 1 COUNT BUFFER REGISTER & COMPARE BUFFER REGISTER (TCNTB1/TCMPB1)
Register Address R/W Description Reset Value
TCNTB1 0x51000018 R/W Timer 1 count buffer register 0x00000000
TCMPB1 0x5100001C R/W Timer 1 compare buffer register 0x00000000
TCMPB1 Bit Description Initial State
Timer 1 compare buffer register [15:0] Set compare buffer value for Timer 1 0x00000000
TCNTB1 Bit Description Initial State
Timer 1 count buffer register [15:0] Set count buffer value for Timer 1 0x00000000
3.7 TIMER 1 COUNT OBSERVATION REGISTER (TCNTO1)
Register Address R/W Description Reset Value
TCNTO1 0x51000020 R Timer 1 count observation register 0x00000000
TCNTO1 Bit Description Initial State
Timer 1 observation register [15:0] Set count observation value for Timer 1 0x00000000
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-18
3.8 TIMER 2 COUNT BUFFER REGISTER & COMPARE BUFFER REGISTER (TCNTB2/TCMPB2)
Register Address R/W Description Reset Value
TCNTB2 0x51000024 R/W Timer 2 count buffer register 0x00000000
TCMPB2 0x51000028 R/W Timer 2 compare buffer register 0x00000000
TCMPB2 Bit Description Initial State
Timer 2 compare buffer register [15:0] Set compare buffer value for Timer 2 0x00000000
TCNTB2 Bit Description Initial State
Timer 2 count buffer register [15:0] Set count buffer value for Timer 2 0x00000000
3.9 TIMER 2 COUNT OBSERVATION REGISTER (TCNTO2)
Register Address R/W Description Reset Value
TCNTO2 0x5100002C R Timer 2 count observation register 0x00000000
TCNTO2 Bit Description Initial State
Timer 2 observation register [15:0] Set count observation value for Timer 2 0x00000000
S3C2450X RISC MICROPROCESSOR PWM TIMER
13-19
3.10 TIMER 3 COUNT BUFFER REGISTER & COMPARE BUFFER REGISTER (TCNTB3/TCMPB3)
Register Address R/W Description Reset Value
TCNTB3 0x51000030 R/W Timer 3 count buffer register 0x00000000
TCMPB3 0x51000034 R/W Timer 3 compare buffer register 0x00000000
TCMPB3 Bit Description Initial State
Timer 3 compare buffer register [15:0] Set compare buffer value for Timer 3 0x00000000
TCNTB3 Bit Description Initial State
Timer 3 count buffer register [15:0] Set count buffer value for Timer 3 0x00000000
3.11 TIMER 3 COUNT OBSERVATION REGISTER (TCNTO3)
Register Address R/W Description Reset Value
TCNTO3 0x51000038 R Timer 3 count observation register 0x00000000
TCNTO3 Bit Description Initial State
Timer 3 observation register [15:0] Set count observation value for Timer 3 0x00000000
PWM TIMER S3C2450X RISC MICROPROCESSOR
13-20
3.12 TIMER 4 COUNT BUFFER REGISTER (TCNTB4)
Register Address R/W Description Reset Value
TCNTB4 0x5100003C R/W Timer 4 count buffer register 0x00000000
TCNTB4 Bit Description Initial State
Timer 4 count buffer register [15:0] Set count buffer value for Timer 4 0x00000000
3.13 TIMER 4 COUNT OBSERVATION REGISTER (TCNTO4)
Register Address R/W Description Reset Value
TCNTO4 0x51000040 R Timer 4 count observation register 0x00000000
TCNTO4 Bit Description Initial State
Timer 4 observation register [15:0] Set count observation value for Timer 4 0x00000000
S3C2450X RISC MICROPROCESSOR REAL TIME CLOCK
14-1
14 REAL TIME CLOCK (RTC)
This chapter describes the functions and usage of Real Time Clock (RTC) in S3C2450 RISC microprocessor.
1 OVERVIEW
The Real Time Clock (RTC) unit can be operated by the backup battery when the system power is off. The data
include the time by second, minute, hour, date, day, month, and year. The RTC unit works with an external 32.768
KHz crystal and can perform the alarm function.
1.1 FEATURES
The Real Time Clock includes the following features:
• BCD number: second, minute, hour, date, day, month, and year.
• Leap year generator
• Alarm function: alarm-interrupt or wake-up from power-off mode.
• Tick counter function: tick-interrupt or wake-up from power-off mode.
• Year 2000 problem is removed.
• Independent power pin (RTCVDD).
• Supports millisecond tick time interrupt for RTOS kernel time tick.
REAL TIME CLOCK S3C2450X RISC MICROPROCESSOR
14-2
1.2 REAL TIME CLOCK OPERATION DESCRIPTION
215 Clock
Divider
XTOrtc
XTIrtc
Control
Register
SEC MIN HOUR DATE DAY MON YEAR
Leap Year Generator
Alarm Generator
Reset
Register
1 Hz
ALMINT
RTCCON RTCALM
RTCRST
Time Tick Generator TICWKUP
TICNT
32KHz~1Hz
ALMWKUP
TICINT
Figure 14-1. Real Time Clock Block Diagram
1.2.1 Leap Year Generator
The leap year generator can determine the last date of each month out of 28, 29, 30, or 31, based on data from
BCDDAY, BCDMON, and BCDYEAR. This block considers leap year in deciding on the last date. An 8-bit counter
can only represent 2 BCD digits, therefore it cannot decide whether “00” year (the year with its last two digits
zeros) is a leap year or not. For example, it cannot discriminate between 1900 and 2000. To solve this problem,
the RTC block in S3C2450 has hard-wired logic to support the leap year in 2000. Note 1900 is not leap year while
2000 is leap year in general Gregorian calendar. Therefore, two digits of 00 in S3C2450 denote 2000, not 1900.
So, RTC in S3C2450 supports from 1901 to 2099.
S3C2450X RISC MICROPROCESSOR REAL TIME CLOCK
14-3
1.2.2 Read/Write Register
Bit 0 of the RTCCON register must be set high in order to write the BCD register in RTC block. To display the
second, minute, hour, day, date, month, and year, the CPU must read the data in BCDSEC, BCDMIN,
BCDHOUR, BCDDATE, BCDDAY, BCDMON, and BCDYEAR registers respectively in the RTC block. However, a
one second deviation may exist because multiple registers are read. For example, when the user reads the
registers from BCDYEAR to BCDMIN, the result is assumed to be 2059 (Year), 12 (Month), 31 (Date), 23 (Hour)
and 59 (Minute). When the user read the BCDSEC register and the value ranges from 1 to 59 (Second), there is
no problem, but, if the value is 0 sec., the year, month, date, hour, and minute may be changed to 2060 (Year), 1
(Month), 1 (Date), 0 (Hour) and 0 (Minute) because of the one second deviation that was mentioned. In this case,
the user must re-read from BCDYEAR to BCDSEC if BCDSEC is zero.
1.2.3 Backup Battery Operation
The RTC logic can be driven by the backup battery, which supplies the power through the RTCVDD pin into the
RTC block, even if the system power is off. When the system is off, the interfaces of the CPU and RTC logic must
be blocked, and the backup battery only drives the oscillation circuit and the BCD counters to minimize power
dissipation.
1.2.4 Alarm Function
The RTC generates ALMINT(alarm interrupt) and ALMWKUP(alarm wake-up) at a specified time in the power-
down mode, power off mode or normal operation mode. In normal operation mode, If ALARM register value is a
same to BCD register, ALMINT is activated as well as the ALMWKUP. In the power-off and power-down, If
ALARM register value is a same to BCD register, ALMWKUP is activated. The RTC alarm register (RTCALM)
determines the alarm enable/disable status and the condition of the alarm time setting.
REAL TIME CLOCK S3C2450X RISC MICROPROCESSOR
14-4
1.2.5 Tick time interrupt
The RTC tick time is used for interrupt request. The TICNT register has an interrupt enable bit and the count value
for the interrupt. The count value reaches ‘0’ when the tick time interrupt occurs. Then the period of interrupt is as
follows:
• Tick clock frequency (Hz) = RTC clock / 2n
- n: RTC clock divide value(decided by RTCCON[8:4] )
• Resolution = 1 / Tick clock frequency
• Clock range = Resolution * 232
Tick counter clock source
selection
Tick clock
source frequency(Hz) Clock range (s) Resolution (ms)
TICSel = 1 32768 (2^15) 0 ~ 217 0.03
TICsel2 = 0, TICSel =0 16384 (2^14) 0 ~ 218 0.06
TICsel2 = 1, TICSel =0 8192 (2^13) 0 ~ 219 0.12
TICsel2 = 2, TICSel =0 4096 (2^12) 0 ~220 0.24
TICsel2 = 3, TICSel =0 2048 (2^11) 0 ~ 221 0.49
TICsel2 = 6, TICSel =0 1024 (2^10) 0 ~ 222 0.97
TICsel2 = 7, TICSel =0 512 (2^9) 0 ~ 223 1.95
TICsel2 = 8, TICSel =0 256 (2^8) 0 ~ 224 3.90
TICsel2 = 4, TICSel =0 128 (2^7) 0 ~ 225 7.81
TICsel2 = 9, TICSel =0 64 (2^6) 0 ~ 226 15.62
TICsel2 = 10, TICSel =0 32 (2^5) 0 ~ 227 31.25
TICsel2 = 11, TICSel =0 16 (2^4) 0 ~ 228 62.50
TICsel2 = 12, TICSel =0 8 (2^3) 0 ~ 229 125
TICsel2 = 13, TICSel =0 4 (2^2) 0 ~ 230 250
TICsel2 = 14, TICSel =0 2 0 ~231 500
TICsel2 = 5, TICSel =0 1 0 ~232 1000
NOTE: This RTC time tick may be used for real time operating system (RTOS) kernel time tick.
If time tick is generated by the RTC time tick, the time related function of RTOS will always synchronized in real time.
S3C2450X RISC MICROPROCESSOR REAL TIME CLOCK
14-5
Figure 14-2. RTC Tick Interrupt Clock Scheme
Example) For 1 ms Tick interrupt generation.
1st ) RTCCON[0]= 1’b1 ( RTC enable )
2nd) RTCCON[3]=1’b1 ( RTC clock counter reset).
3rd) RTCCON[3] = 1’b0 ( RTC clock counter enable)
4th) RTCCON[8:5] = 4’b0011 ( RTC divide clock selection.)
5th) TICNT1[6:0] = 7’h1 (Tick counter value setting).
6th) TICNT0[7] = 1’b1 (Tick counter enable).
REAL TIME CLOCK S3C2450X RISC MICROPROCESSOR
14-6
1.2.6 32.768 kHz X-TAL Connection EXAMPLE
The Figure 14-3 shows a circuit of the RTC unit oscillation at 32.768 kHz.
A) RTC Block is used
15~22pF
5Mohm
XTIRTC
XTORTC
XTIRTC
XTORTC
B) RTC Block is not used
15~22pF VDD_RTC
32768Hz
Figure 14-3. Main Oscillator Circuit Example
1.3 EXTERNAL INTERFACE
Name Direction Description
XTI Input 32 kHz RTC Oscillator Clock Input
XTO Input 32 kHz RTC Oscillator Clock output
S3C2450X RISC MICROPROCESSOR REAL TIME CLOCK
14-7
1.4 REGISTER DESCRIPTION
1.4.1 Memory Map
Table 14-1. RTC Register summary
Register Address R/W Description Reset Value
RTCCON 0x57000040 R/W RTC control Register 0x00
TICNT0 0x57000044 R/W Tick time count Register0 0x0
TICNT1 0x5700004C R/W Tick time count Register1 0x0
TICNT2 0x57000048 R/W Tick time count Register2 0x0
RTCALM 0x57000050 R/W RTC alarm control Register 0x0
ALMSEC 0x57000054 R/W Alarm second data Register 0x0
ALMMIN 0x57000058 R/W Alarm minute data Register 0x00
ALMHOUR 0x5700005C R/W Alarm hour data Register 0x0
ALMDATE 0x57000060 R/W Alarm date data Register 0x01
ALMMON 0x57000064 R/W Alarm month data Register 0x01
ALMYEAR 0x57000068 R/W Alarm year data Register 0x0
BCDSEC 0x57000070 R/W BCD second Register Undefined
BCDMIN 0x57000074 R/W BCD minute Register Undefined
BCDHOUR 0x57000078 R/W BCD hour Register Undefined
BCDDATE 0x5700007C R/W BCD date Register Undefined
BCDDAY 0x57000080 R/W BCD day Register Undefined
BCDMON 0x57000084 R/W BCD month Register Undefined
BCDYEAR 0x57000088 R/W BCD year Register Undefined
TICKCNT 0x57000090 R Internal tick time counter register 0x0
REAL TIME CLOCK S3C2450X RISC MICROPROCESSOR
14-8
1.5 INDIVIDUAL REGISTER DESCRIPTIONS
1.5.1 REAL TIME CLOCK CONTROL (RTCCON) REGISTER
The RTCCON register consists of 9 bits. It controls the read/write enable of the CLKSEL, CNTSEL and CLKRST
for testing.
RTCEN bit can control all interfaces between the CPU and the RTC, Therefore it must be set to 1 in an RTC
control routine to enable data read/write after a system reset. Before power off, the RTCEN bit is cleared to 0 to
prevent inadvertent writing into BCD counter register.
CLKRST is counter reset for 215 Clock divider.(reference to Figure 15-1)
Before RTC clock setting, 215 Clock divider must be reset for exact RTC operation.
Register Address R/W Description Reset Value
RTCCON 0x57000040 R/W RTC control register 0x00
RTCCON Bit Description Initial State
TICsel2 [8:5] Tick Time clock select2.
0 = clock period of 1/16384 second select
1 = clock period of 1/8192 second select
2 = clock period of 1/4096 second select
3 = clock period of 1/2048 second select
4 = clock period of 1/128 second select
5 = clock period of 1 second select
6 = clock period of 1/1024 second select
7 = clock period of 1/512 second select
8 = clock period of 1/256 second select
9 = clock period of 1/64 second select
10 = clock period of 1/32 second select
11 = clock period of 1/16 second select
12 = clock period of 1/8 second select
13 = clock period of 1/4 second select
14 = clock period of 1/2 second select
0x0
TICsel [4] Tick Time clock select1.
0 = Clock period select at TICsel2
1 = Clock period of 1/32768 second
0
CLKRST [3] RTC clock count reset.
0 = No reset
1 = Reset
0
CNTSEL [2] BCD count select.
0 = Merge BCD counters
1 = Reserved (Separate BCD counters)
0
CLKSEL [1] BCD clock select.
0 = XTAL 1/215 divided clock
1 = Reserved (XTAL clock only for test)
0
RTCEN [0] RTC control enable.
0 = Disable 1 = Enable
Note: Only BCD time count and read operation can be performed.
0
S3C2450X RISC MICROPROCESSOR REAL TIME CLOCK
14-9
1.5.2 Tick Time Count Register 0 (TICNT0)
The TICNT0 register determines tick interrupt enable and tick counter value
S3C2450 supports 32bits tic time counter.
So, from 14 to 8bits of 32bit tick time count value is selected at TICNT0 register (TICNT0[6:0]).
Lower 8bits of 15bit tick time count value is selected at TICNT1 register (TICNT1[7:0]).
Upper 17 bits of 32bit tick time count value is selected at TICNT2 register (TICNT0[16:0]).
NOTE
Tick time count value = (TICK TIME COUNT 0) x 28 + (T ICK TIME COUNT 1) + (TICK TIME COUNT2)
x 215
Register Address R/W Description Reset Value
TICNT0 0x57000044 R/W Tick time count register 0x00
TICNT Bit Description Initial State
TICK INT ENABLE [7] Tick time interrupt enable.
0 = Disable
1 = Enable
b’0
TICK TIME COUNT 0 [6:0] [14:8] bits of 32 bit tick time count value b’0
1.5.3 Tick Time Count Register 1 (TICNT1)
Register Address R/W Description Reset Value
TICNT1 0x5700004C
R/W
Tick time count register 1 0x00
TICNT1 Bit Description Initial State
TICK TIME COUNT 1 [7:0] Lower 8 bits of 32bit tick time count value b’000000
REAL TIME CLOCK S3C2450X RISC MICROPROCESSOR
14-10
1.5.4 Tick Time Count Register 2 (TICNT2)
Register Address R/W Description Reset Value
TICNT2 0x57000048 R/W Tick time count register 2 0x00
TICNT2 Bit Description Initial State
TICK TIME COUNT 2 [16:0] High 17 bits of 32bit tick time count value b’000000
1.5.5 RTC ALARM Control (RTCALM) Register
The RTCALM register determines the alarm enable and the alarm time. Note that the RTCALM register generates
the alarm signal through both ALMINT and ALMWKUP as power mode.
For using ALMINT and ALMWKUP, ALMEN must be enable.
If compare value is year, ALMEN and YEAREN must be enable.
If compare values are year,mon,date,hour,min and sec, ALMEN,YEAREN,MONEN,DATEEN,HOUREN,MINEN
and SECEN must be enable.
Register Address R/W Description Reset Value
RTCALM 0x57000050 R/W RTC alarm control register 0x0
RTCALM Bit Description Initial State
Reserved [7] 0
ALMEN [6] Alarm global enable
0 = Disable, 1 = Enable
Note: For using ALMINT and ALMWKUP, set ALMEN=1’b1
0
YEAREN [5] Year alarm enable
0 = Disable, 1 = Enable 0
MONEN [4] Month alarm enable
0 = Disable, 1 = Enable 0
DATEEN [3] Date alarm enable
0 = Disable, 1 = Enable 0
HOUREN [2] Hour alarm enable
0 = Disable, 1 = Enable 0
MINEN [1] Minute alarm enable
0 = Disable, 1 = Enable 0
SECEN [0] Second alarm enable
0 = Disable, 1 = Enable 0
S3C2450X RISC MICROPROCESSOR REAL TIME CLOCK
14-11
1.5.6 ALARM Second Data (ALMSEC) Register
Register Address R/W Description Reset Value
ALMSEC 0x57000054 R/W Alarm second data Register 0x0
ALMSEC Bit Description Initial State
Reserved [7] 0
[6:4] BCD value for alarm second.
0 ~ 5 000 SECDATA
[3:0] 0 ~ 9 0000
1.5.7 ALARM MIN Data (ALMMIN) Register
Register Address R/W Description Reset Value
ALMMIN 0x57000058 R/W Alarm minute data Register 0x00
ALMMIN Bit Description Initial State
Reserved [7] 0
[6:4] BCD value for alarm minute.
0 ~ 5 000 MINDATA
[3:0] 0 ~ 9 0000
1.5.8 ALARM HOUR Data (ALMHOUR) Register
Register Address R/W Description Reset Value
ALMHOUR 0x5700005C R/W Alarm hour data Register 0x0
ALMHOUR Bit Description Initial State
Reserved [7:6] 00
[5:4] BCD value for alarm hour.
0 ~ 2 00 HOURDATA
[3:0] 0 ~ 9 0000
REAL TIME CLOCK S3C2450X RISC MICROPROCESSOR
14-12
1.5.9 ALARM DATE Data (ALMDATE) Register
Register Address R/W Description Reset Value
ALMDATE 0x57000060 R/W Alarm day data Register 0x01
ALMDATE Bit Description Initial State
Reserved [7:6] 00
[5:4] BCD value for alarm date, from 0 to 28, 29, 30, 31.
0 ~ 3 00 DATEDATA
[3:0] 0 ~ 9 0001
1.5.10 ALARM MONTH Data (ALMMON) Register
Register Address R/W Description Reset Value
ALMMON 0x57000064 R/W Alarm month data Register 0x01
ALMMON Bit Description Initial State
Reserved [7:5] 00
[4] BCD value for alarm month.
0 ~ 1 0 MONDATA
[3:0] 0 ~ 9 0001
1.5.11 ALARM YEAR Data (ALMYEAR) Register
Register Address R/W Description Reset Value
ALMYEAR 0x57000068 R/W Alarm year data Register 0x0
ALMYEAR Bit Description Initial State
[7:4] BCD value for year.
0~9
0x0 YEARDATA
[3:0] 0~9 0x0
S3C2450X RISC MICROPROCESSOR REAL TIME CLOCK
14-13
1.5.12 BCD SECOND (BCDSEC) Register
Register Address R/W Description Reset Value
BCDSEC 0x57000070 R/W BCD second Register Undefined
BCDSEC Bit Description Initial State
[6:4] BCD value for second.
0 ~ 5
−
SECDATA
[3:0] 0 ~ 9 −
1.5.13 BCD MINUTE (BCDMIN) Register
Register Address R/W Description Reset Value
BCDMIN 0x57000074 R/W BCD minute Register Undefined
BCDMIN Bit Description Initial State
[6:4] BCD value for minute.
0 ~ 5
−
MINDATA
[3:0] 0 ~ 9 −
1.5.14 BCD HOUR(BCDHOUR) Register
Register Address R/W Description Reset Value
BCDHOUR 0x57000078 R/W BCD hour Register Undefined
BCDHOUR Bit Description Initial State
Reserved [7:6] −
[5:4] BCD value for hour.
0 ~ 2
−
HOURDATA
[3:0] 0 ~ 9 −
REAL TIME CLOCK S3C2450X RISC MICROPROCESSOR
14-14
1.5.15 BCD DATE (BCDDATE) Register
Register Address R/W Description Reset Value
BCDDATE 0x5700007C R/W BCD DATE Register Undefined
BCDDAY Bit Description Initial State
Reserved [7:6] −
[5:4] BCD value for date.
0 ~ 3
−
DATEDATA
[3:0] 0 ~ 9 −
1.5.16 BCD DAY (BCDDAY) Register
Register Address R/W Description Reset Value
BCDDAY 0x57000080 R/W BCD DAY Register Undefined
BCDDAY Bit Description Initial State
Reserved [7:3] −
DAYDATA [2:0] BCD value for a day of the week.
1 ~ 7
−
1.5.17 BCD MONTH (BCDMON) Register
Register Address R/W Description Reset Value
BCDMON 0x57000084 R/W BCD month Register Undefined
BCDMON Bit Description Initial State
Reserved [7:5] −
[4] BCD value for month.
0 ~ 1
−
MONDATA
[3:0] 0 ~ 9 −
S3C2450X RISC MICROPROCESSOR REAL TIME CLOCK
14-15
1.5.18 BCD YEAR (BCDYEAR) Register
Register Address R/W Description Reset Value
BCDYEAR 0x57000088 R/W BCD year Register Undefined
BCDYEAR Bit Description Initial State
[7:4] BCD value for year.
0~9
0x0 YEARDATA
[3:0] 0~9 0x0
NOTE: For setting BCD registers, RTCEN(RTCCON[0] bit) must be ebable.
But at no setting BCD registers, RTCEN must be disable for reducing power comsumption.
1.5.19 TICK Counter Register
Register Address R/W Description Reset Value
TICKCNT 0x57000090 R Internal tick time counter register 0x00
TICKCNT Bit Description Initial State
TICKCNT [31:0] Internal tick counter. Only readable
0 ~ 4294967295 0
REAL TIME CLOCK S3C2450X RISC MICROPROCESSOR
14-16
NOTES
S3C2450X RISC MICROPROCESSOR UART
15-1
15 UART
1 OVERVIEW
The S3C2450 Universal Asynchronous Receiver and Transmitter (UART) provide four independent asynchronous
serial I/O (SIO) ports, each of which can operate in Interrupt-based or DMA-based mode. The UART can support
bit rates up to 3Mbps bps. Each UART channel contains two 64-byte FIFOs for receiver and transmitter.
The S3C2450 UART includes programmable baud rates, infrared (IR) transmit/receive, one or two stop bit
insertion, 5-bit, 6-bit, 7-bit or 8-bit data width and parity checking.
Each UART contains a baud-rate generator, transmitter, receiver and a control unit, as shown in Figure 15-1. The
baud-rate generator can be clocked by PCLK, EXTUARTCLK or divided EPLL clock. The transmitter and the
receiver contain 64-byte FIFOs and data shifters. Data is written to FIFO and then copied to the transmit shifter
before being transmitted. The data is then shifted out by the transmit data pin (TxDn). Meanwhile, received data is
shifted from the receive data pin (RxDn), and then copied to FIFO from the shifter.
1.1 FEATURES
• RxD0, TxD0, RxD1, TxD1, RxD2, TxD2, RxD3 and TxD3 with DMA-based or interrupt-based operation
• UART Ch 0, 1, 2 and 3 with IrDA 1.0 & 64-byte FIFO
• UART Ch 0, 1 and 2 support Auto Flow Control with nRTS0, nCTS0, nRTS1, nCTS1, nRTS2 and nCTS2
signals
• Supports high-speed operation up to 3Mbps (in case of using EXTUARTCLK, divided EPLL clock)
UART S3C2450X RISC MICROPROCESSOR
15-2
2 BLOCK DIAGRAM
Buad-rate
Generator
Control
Unit
Transmitter
Receiver
Peripheral BUS
TXDn
Clock Source
(PCLK, EXTUARTCLK, EPLL clock/n)
RXDn
Transmit FIFO Register
(FIFO mode)
Transmit Holding Register
(Non-FIFO mode)
Receive FIFO Register
(FIFO mode)
Receive Holding Register
(Non-FIFO mode only)
In FIFO mode, all 64 Byte of Buffer register are used as FIFO register.
In non-FIFO mode, only 1 Byte of Buffer register is used as Holding register.
Transmit Shifter
Transmit Buffer
Register(64 Byte)
Receive Shifter
Receive Buffer
Register(64 Byte)
Figure 15-1. UART Block Diagram (with FIFO)
S3C2450X RISC MICROPROCESSOR UART
15-3
2.1 UART OPERATION
The following sections describe the UART operations that include data transmission, data reception, auto flow
control, interrupt generation, Loopback mode, Infrared mode, and baud-rate generation.
2.1.1 Data
Transmission
The data frame for transmission is programmable. It consists of a start bit, 5 to 8 data bits, an optional parity bit
and 1 to 2 stop bits, which can be specified by the line control register (ULCONn). The transmitter can also
produce the break condition, which forces the serial output to logic 0 state for one frame transmission time. This
block transmits break signals after the present transmission word is transmitted completely. After the break signal
transmission, it continuously transmits data into the Tx FIFO (Tx holding register in the case of Non-FIFO mode).
2.1.2 Data Reception
Like the transmission, the data frame for reception is also programmable. It consists of a start bit, 5 to 8 data bits,
an optional parity bit and 1 to 2 stop bits in the line control register (ULCONn). The receiver can detect overrun
error, parity error, frame error and break condition, each of which can set an error flag.
• The overrun error indicates that new data has overwritten the old data before the old data has been read.
• The parity error indicates that the receiver has detected an unexpected parity condition.
• The frame error indicates that the received data does not have a valid stop bit.
• The break condition indicates that the RxDn input is held in the logic 0 state for a duration longer than one
frame transmission time.
Receive time-out condition occurs when it does not receive any data during the 3 word time (this interval follows
the setting of Word Length bit) and the Rx FIFO is not empty in the FIFO mode.
UART S3C2450X RISC MICROPROCESSOR
15-4
2.1.3 Auto Flow Control (AFC)
UART 0, UART 1 and UART 2 support auto flow control with nRTS and nCTS signals. In AFC, nCTS signals
control the operation of the transmitter, and nRTS depends on the condition of the receiver.
The UART's transmitter transfers the data in FIFO only when nCTS signals are activated(Low) (In AFC, nCTS
means that other UART's FIFO is ready to receive data or not).
Before the UART receives data, nRTS signal has to be activated(Low) when its receive FIFO has a spare space
more than 32-byte(FIFO contains less than 32-byte). And nRTS signal has to be inactivated(High) when its
receive FIFO has a spare under 32-byte(FIFO contains equal or more than 32-byte) in case of RTS trigger level is
32byte. (In AFC, nRTS means that its own receive FIFO is ready to receive data or not).
UART A
TxD
nCTS
UART B
RxD
nRTS
Transmission Case in UART A
UART A
RxD
nRTS
UART B
TxD
nCTS
Reception Case in UART A
Figure 15-2. UART AFC Interface
NOTE
UART 3 does not support AFC function, because the S3C2450 has no nRTS 3 and nCTS 3.
S3C2450’s AFC does not support the RS-232C interface.
Table 15-1. Example of nRTS signal change by FIFO Spare size
(In case of Reception Case in UART A)
RX side TX side
FIFO
Contains FIFO Spare
Space nRTS
Signal nRTS
Meaning nCTS
Signal nCTS
Meaning
33 byte 31 byte High Not ready to receive High Don’t send data to RX side
32 byte 32 byte High Not ready to receive High Don’t send data to RX side
31 byte 33 byte Low Ready to Receive Low Send data to RX side
30 byte 34 byte Low Ready to Receive Low Send data to RX side
S3C2450X RISC MICROPROCESSOR UART
15-5
2.1.4 Non Auto-Flow Control (Controlling nRTS and nCTS by Software)
If users want to connect a UART to a Modem, disable auto flow control bit in UMCONn register and control the
signal of nRTS by software.
Example:
Rx Operation with FIFO
1. Select receive mode (Interrupt or DMA mode).
2. Check the value of Rx FIFO count in UFSTATn register. If the value is less than 32, users have to set the
value of UMCONn[0] to '1' (activating nRTS), and if it is equal or larger than 32 users have to set the
value to '0' (inactivating nRTS).
3. Repeat the Step 2.
Tx Operation with FIFO
1. Select transmit mode (Interrupt or DMA mode).
2. Check the value of UMSTATn[0]. If the value is '1' (activating nCTS), users write the data to Tx FIFO
register.
3. Repeat the Step 2.
2.1.5 RS-232C Interface
If the user wants to connect the UART to modem interface (instead of null modem), nRTS, nCTS, nDSR, nDTR,
DCD and nRI signals are needed. In this case, the users can control these signals with general I/O ports by
software because the AFC does not support the RS-232C interface.
UART S3C2450X RISC MICROPROCESSOR
15-6
2.1.6 Interrupt/DMA Request Generation
Each UART of the S3C2450 has seven status (Tx/Rx/Error) signals: Overrun error, Parity error, Frame error,
Break, Receive buffer data ready, Transmit buffer empty, and Transmit shifter empty, all of which are indicated by
the corresponding UART status register (UTRSTATn/UERSTATn).
The overrun error, parity error, frame error and break condition are referred to as the receive error status. Each of
which can cause the receive error status interrupt request, if the receive-error-status-interrupt-enable bit is set to
one in the control register, UCONn. When a receive-error-status-interrupt-request is detected, the signal causing
the request can be identified by reading the value of UERSTSTn.
When the receiver transfers the data of the receive shifter to the receive FIFO register in FIFO mode and the
number of received data reaches Rx FIFO Trigger Level, Rx interrupt is generated. If the Receive mode is in
control register (UCONn) and is selected as 1 (Interrupt request or polling mode). In the Non-FIFO mode,
transferring the data of the receive shifter to receive holding register will cause Rx interrupt under the Interrupt
request and polling mode.
When the transmitter transfers data from its transmit FIFO register to its transmit shifter and the number of data
left in transmit FIFO reaches Tx FIFO Trigger Level, Tx interrupt is generated, if Transmit mode in control register
is selected as Interrupt request or polling mode. In the Non-FIFO mode, transferring data from the transmit
holding register to the transmit shifter will cause Tx interrupt under the Interrupt request and polling mode.
Note that the Tx interrupt is always requested whenever the number of data in the transmit FIFO is smaller than
the trigger level. This means that an interrupt is requested as soon as you enable the Tx interrupt unless you fill
the Tx buffer prior to that. It is recommended to fill the Tx buffer first and then enable the Tx interrupt.
If the Receive mode and Transmit mode in control register are selected as the DMAn request mode then DMAn
request occurs instead of Rx or Tx interrupt in the situation mentioned above.
Table 15-2. Interrupts in Connection with FIFO
Type FIFO Mode Non-FIFO Mode
Rx Interrupt Generated whenever receive data reaches the
trigger level of receive FIFO.
Generated when the number of data in FIFO does
not reaches Rx FIFO trigger Level and does not
receive any data during 3 words time (receive time
out). This interval follows the setting of Word Length
bit.
Generated by the receiving holding
register whenever receive buffer
becomes full.
Tx Interrupt Generated whenever transmit data reaches the
trigger level of transmit FIFO (Tx FIFO trigger
Level).
Generated by the transmitting holding
register whenever transmit buffer
becomes empty.
Error Interrupt Generated when frame error, parity error, or break
signal are detected.
Generated when it gets to the top of the receive
FIFO without reading out data in it (overrun error).
Generated by all errors. However if
another error occurs at the same time,
only one interrupt is generated.
S3C2450X RISC MICROPROCESSOR UART
15-7
2.1.7 UART Error Status FIFO
UART has the error status FIFO besides the Rx FIFO register. The error status FIFO indicates which data, among
FIFO registers, is received with an error. The error interrupt will be issued only when the data, which has an error,
is ready to read out. To clear the error status FIFO, the URXHn with an error and UERSTATn must be read out.
For example,
It is assumed that the UART Rx FIFO receives A, B, C, D and E characters sequentially and the frame error
occurs while receiving 'B', and the parity error occurs while receiving 'D'.
The actual UART receive error will not generate any error interrupt because the character which is received with
an error would have not been read. The error interrupt will occur once the character is read.
Figure 15-3 shows the UART receiving the five characters including the two errors.
Time Sequence Flow Error Interrupt Note
#0 When no character is read out −
#1 A, B, C, D, and E is received −
#2 After A is read out The frame error (in B) interrupt occurs. The 'B' has to be read out.
#3 After B is read out −
#4 After C is read out The parity error (in D) interrupt occurs. The 'D' has to be read out.
#5 After D is read out −
#6 After E is read out −
-
-
-
-
-
-
-
-
-
-
-
'E'
'D'
'C'
'B'
'A'
Rx FIFO
URXHn UERSTATn
break error parity error frame error
Error Status Generator Unit
Error Status FIFO
Figure 15-3. Example showing UART Receiving 5 Characters with 2 Errors
UART S3C2450X RISC MICROPROCESSOR
15-8
2.1.8 Loopback Mode
The S3C2450 UART provides a test mode referred to as the Loopback mode, to aid in isolating faults in the
communication link. This mode structurally enables the connection of RXD and TXD in the UART. In this mode,
therefore, transmitted data is received to the receiver, via RXD. This feature allows the processor to verify the
internal transmit and to receive the data path of each SIO channel. This mode can be selected by setting the
loopback bit in the UART control register (UCONn).
2.1.9 Infrared (IR) Mode
The S3C2450 UART block supports infrared (IR) transmission and reception, which can be selected by setting the
Infrared-mode bit in the UART line control register (ULCONn). Figure 15-4 illustrates how to implement the IR
mode.
In IR transmit mode, the transmit pulse comes out at a rate of 3/16, the normal serial transmit rate (when the
transmit data bit is zero); In IR receive mode, the receiver must detect the 3/16 pulsed period to recognize a zero
value (see the frame timing diagrams shown Figure 15-6 and Figure 15-7).
IrDA Tx
Encoder
0
1
0
1
IrDA Rx
Decoder
TxD
RxD
TxD
IRS
RxD
RE
UART
Block
Figure 15-4. IrDA Function Block Diagram
S3C2450X RISC MICROPROCESSOR UART
15-9
Figure 15-5. Serial I/O Frame Timing Diagram (Normal UART)
Figure 15-6. Infrared Transmit Mode Frame Timing Diagram
Figure 15-7. Infrared Receive Mode Frame Timing Diagram
UART S3C2450X RISC MICROPROCESSOR
15-10
2.1.10 Baud-rate Generation
Each UART's baud-rate generator provides the serial clock for the transmitter and the receiver. The source clock
for the baud-rate generator can be selected with the S3C2450's internal system clock(PCLK or divided EPLL
clock) or EXTUARTCLK. UARTCLK (Clock frequencies of 16 times the baud rate) are used for sampling serial
data to minimize error. UARTCLK is generated by dividing the source clock. The baud-rate clock is generated by
dividing the UARTCLK by 16.
The value stored in the baud rate divisor register (UBRDIVn) and dividing slot register(UDIVSLOTn), are used to
determine the serial Tx/Rx clock rate (baud rate) as follows:
DIV_VAL = (SRCCLK / UARTCLK ) –1
= {SRCCLK / (baud rate x 16 ) } –1
=UBRDIVn + (num of 1’s in UDIVSLOTn)/16
(SRCCLK : PCLK, EXTUARTCLK or divided EPLL clock)
Where, Integer part of DIV_VAL should be from 1 to (216-1), but can be set zero when SRCCLK is EXTUARTCLK
or divided EPLL clock. (Please refer the Figure 15-3 by this effect)
Using UDIVSLOT which is the factor of floating point divisor, you can make more accurate baud rate. (when
UBRDIVn is 0, floating part will not be affected.)
For example, if the baud rate is 115200 bps and SRCCLK is 40 MHz, UBRDIVn and UDIVSLOTn are :
DIV_VAL = {40000000 / (115200 x 16)} -1
= 21.7 -1 (actual dividing value is 21.7)
= 20.7 (for register setting, 20.7 is needed here)
* UBRDIVn = 20 ( integer part of DIV_VAL )
(num of 1’s in UDIVSLOTn)/16 = 0.7
(num of 1’s in UDIVSLOTn) = 11
* UDIVSLOTn = 0xEEEA(1110_1110_1110_1010b), 0xDDD5(1101_1101_1101_1010b) or etc.
( floating point part of DIV_VAL )
As a result, DIV_VAL = 20.6875
We recommend to select UDIVSLOTn in the Table 15-4 (at 23 page). For convenience, summary of Table is
presented below.
Floating
point part Num of
1’s UDIVSLOTn Floating
point part Num of
1’s UDIVSLOTn
0 0 0x0000 0.5 8 0x5555
0.0625 1 0x0080 0.5625 9 0xD555
0.125 2 0x0808 0.625 10 0xD5D5
0.1875 3 0x0888 0.6875 11 0xDDD5
0.25 4 0x2222 0.75 12 0xDDDD
0.3125 5 0x4924 0.8125 13 0xDFDD
0.375 6 0x4A52 0.875 14 0xDFDF
0.4375 7 0x54AA 0.9375 15 0xFFDF
S3C2450X RISC MICROPROCESSOR UART
15-11
2.1.11 Baud-Rate Error Tolerance
UART Frame error should be less than 1.87%(3/160).
UART Frame error = { |Real Frame Length − Ideal Frame Length| / Ideal Frame Length } x 100%
= { |Ideal baudrate − Real baudrate| / Real baudrate } x 100%
Real Frame Length = 1 Frame / Real UART baudrate = 1 Frame x (DIV_VAL+1) x 16 / SRCCLK
Where Real UART baudrate = { SRCCLK / (DIV_VAL+1) } / 16
Ideal Frame Length = 1 Frame / Ideal UART baudrate
NOTE
1Frame = start bit + data bit + parity bit + stop bit.
2.1.12 UART Clock and PCLK Relation
The frequency of UARTCLK(Clock of 16 times baud-rate) must be no more than 5.5/3 times faster than the
frequency of PCLK :
FUARTCLK <= 5.5/3 X FPCLK FUARTCLK = baudrate x 16
This allows sufficient time to write the received data to the receive FIFO
Parameter Symbol Min Typ Max Unit
PCLK speed for UART operating (Baudrate is 1Mbps) FPCLK 8.72 − − MHz
PCLK speed for UART operating (Baudrate is 2Mbps) FPCLK 17.45 − − MHz
PCLK speed for UART operating (Baudrate is 3Mbps) FPCLK 26.18 − − MHz
2.1.13 UART Clock speed/UART Clock selection guide for 3Mbps
For using 3Mbps, EPLL should be either 48MHz or 96MHz. Or EXTUARTCLK should be 48MHz.
Table 15-3. Clock, EPLL Speed Guide
Parameter Min Typ Max Unit
UART source clock(divided EPLL clock) − − 50 MHz
EPLL clock for divided EPLL clock(by UARTDIV of CLKDIV1, refer
Figure 2-9)
− − 100 MHz
EPLL clock(UART source clock is divided EPLL) (3Mbps) − 48, 96 − MHz
EXTUARTCLK (UART source clock is EXTUARTCLK) − 48 MHz
Baudrate (UART source clock is EXTUARTCLK, divided EPLL clock) − 3,000,000 bps
When SRCCLK is PCLK, Integer part of DIV_VAL should be equal or larger than 1(divide SRCCLK by 2). Hence
maximum baudrate is limited. (2.0625Mbps at typical PCLK 66MHz)
UART S3C2450X RISC MICROPROCESSOR
15-12
3 UART SPECIAL REGISTERS
3.1 UART LINE CONTROL REGISTER
There are four UART line control registers including ULCON0, ULCON1, ULCON2 and ULCON3 in the UART
block.
Register Address R/W Description Reset Value
ULCON0 0x50000000 R/W UART channel 0 line control register 0x00
ULCON1 0x50004000 R/W UART channel 1 line control register 0x00
ULCON2 0x50008000 R/W UART channel 2 line control register 0x00
ULCON3 0x5000C000 R/W UART channel 3 line control register 0x00
ULCONn Bit Description Initial State
Reserved [7]
− 0
Infrared Mode [6] Determine whether or not to use the Infrared mode.
0 = Normal mode operation
1 = Infrared Tx/Rx mode
0
Parity Mode [5:3] Specify the type of parity generation and checking during UART
transmit and receive operation.
0xx = No parity
100 = Odd parity
101 = Even parity
110 = Parity forced/checked as 1
111 = Parity forced/checked as 0
000
Number of Stop
Bit [2] Specify how many stop bits are to be used for end-of-frame
signal.
0 = One stop bit per frame
1 = Two stop bit per frame
0
Word Length [1:0] Indicate the number of data bits to be transmitted or received per
frame.
00 = 5-bits 01 = 6-bits
10 = 7-bits 11 = 8-bits
00
S3C2450X RISC MICROPROCESSOR UART
15-13
3.2 UART CONTROL REGISTER
There are four UART control registers including UCON0, UCON1, UCON2 and UCON3 in the UART block.
Register Address R/W Description Reset Value
UCON0 0x50000004 R/W UART channel 0 control register 0x00
UCON1 0x50004004 R/W UART channel 1 control register 0x00
UCON2 0x50008004 R/W UART channel 2 control register 0x00
UCON3 0x5000C004 R/W UART channel 3 control register 0x00
UCONn Bit Description Initial State
Clock Selection [11:10] Select PCLK, EXTUARTCLK(External UART clock) or divided
EPLL clock for source clock of the UART. (note 5)
00, 10 (note 1) = PCLK
01 = EXTUARTCLK
11 = Divided EPLL clock (Refer to the Clock divider control
register1 (CLKDIV1) in the system controller).
0
Tx Interrupt
Type [9] Interrupt request type.
0 = Pulse (Interrupt is requested as soon as the Tx buffer
becomes empty in Non-FIFO mode or reaches Tx FIFO Trigger
Level in FIFO mode.)
0
Rx Interrupt
Type [8] Interrupt request type.
0 = Pulse (Interrupt is requested the instant Rx buffer receives
the data in Non-FIFO mode or reaches Rx FIFO Trigger Level in
FIFO mode.)
0
Rx Time Out
Enable [7] Enable/Disable Rx time out interrupt when UART FIFO is
enabled. The interrupt is a receive interrupt. (note 2)
0 = Disable 1 = Enable
0
Rx Error Status
Interrupt Enable [6] Enable the UART to generate an interrupt upon an exception,
such as a break, frame error, parity error, or overrun error during
a receive operation.
0 = Do not generate receive error status interrupt.
1 = Generate receive error status interrupt.
0
Loopback Mode [5] Setting loopback bit to 1 causes the UART to enter the loopback
mode. This mode is provided for test purposes only.
0 = Normal operation 1 = Loopback mode
0
Send break
signal [4] Setting this bit causes the UART to send a break during 1 frame
time. This bit is auto-cleared after sending the break signal
0 = Normal transmit 1 = Send break signal
0
UART S3C2450X RISC MICROPROCESSOR
15-14
UCONn Bit Description Initial State
Transmit Mode
(note 3)
[3:2] Determine which function is currently able to write Tx data to the
UART transmit buffer register.
00 = Disable
01 = Interrupt request (note 6) or polling mode
10 = DMA request( request signal 0)
11 = DMA request( request signal 1)
00
Receive Mode [1:0] Determine which function is currently able to read data from
UART receive buffer register.
00 = Disable (note 4)
01 = Interrupt request or polling mode
10 = DMA request( request signal 0)
11 = DMA request( request signal 1)
00
NOTES:
1. When you want to change EXTUARTCLK to PCLK for UART baudrate, clock selection field must be set to 2’b10.
2. When the UART does not reach the FIFO trigger level and does not receive data during 3 words time in Interrupt receive
mode with FIFO, the Rx interrupt will be generated (receive time out), and the users should check the FIFO status
and read out the rest.
3. If Tx DMA request signal were 0, Rx DMA request signal should be 1. They can’t share request signal 0 or 1 in common.
(UCONn[3:2], UCONn[1:0]) = (“10b”, “11b”) or (“11b”, “10b”)
4. When Receive mode is enabled, changing of GPIO status affect to RXD line(example : GPIO RXD ->GPIO input -> GPIO
RXD), dummy data can be read at RX FIFO.
Recommended steps are follows.
- Disable Receive Mode
- Set GPIO as UART mode.
- RX FIFO reset.
- Interrupt unmask(enable) if needed
- Enable Receive Mode(Set Receive Mode to Interrupt/DMA request or polling mode)
5. In the middle of operation, changing source clock selection or speed of source clock is prohibited. These must be done
after finishing transmission/receiving
6. Mask bit of INTMSK(Interrupt Mask Register ) should be 0 (unmask) before enabling Transmit mode as Interrupt request
mode.
S3C2450X RISC MICROPROCESSOR UART
15-15
3.3 UART FIFO CONTROL REGISTER
There are four UART FIFO control registers including UFCON0, UFCON1, UFCON2 and UFCON3 in the UART
block.
Register Address R/W Description Reset Value
UFCON0 0x50000008 R/W UART channel 0 FIFO control register 0x0
UFCON1 0x50004008 R/W UART channel 1 FIFO control register 0x0
UFCON2 0x50008008 R/W UART channel 2 FIFO control register 0x0
UFCON3 0x5000C008 R/W UART channel 3 FIFO control register 0x0
UFCONn Bit Description Initial State
Tx FIFO Trigger
Level (note 2)
[7:6] Determine the trigger level of transmit FIFO.
00 = Empty
01 = 16-byte
10 = 32-byte
11 = 48-byte
00
Rx FIFO Trigger
Level (note 2)
[5:4] Determine the trigger level of receive FIFO.
00 = 1-byte
01 = 8-byte
10 = 16-byte
11 = 32-byte
00
Reserved [3]
− 0
Tx FIFO Reset [2] Auto-cleared after resetting FIFO
0 = Normal
1 = Tx FIFO reset
0
Rx FIFO Reset [1] Auto-cleared after resetting FIFO
0 = Normal
1 = Rx FIFO reset
0
FIFO Enable
(note 2)
[0] 0 = Disable (note 1)
1 = Enable
0
NOTES:
1. At DMA mode, FIFO Enable should be Disabled.
2. Please refer the following recommendation for Interrupt / DMA mode.
Mode FIFO enable TX FIFO
Trigger level RX FIFO
Trigger level RX time out
enable
Interrupt mode Enable (FIFO mode) 16~48byte 8~32byte enable
DMA mode Disable (Non-FIFO
mode) n/a n/a n/a
UART S3C2450X RISC MICROPROCESSOR
15-16
3.4 UART MODEM CONTROL REGISTER
There are three UART MODEM control registers including UMCON0 and UMCON1 in the UART block.
Register Address R/W Description Reset Value
UMCON0 0x5000000C R/W UART channel 0 Modem control register 0x0
UMCON1 0x5000400C R/W UART channel 1 Modem control register 0x0
UMCON2 0x5000800C R/W UART channel 2 Modem control register 0x0
UMCONn Bit Description Initial State
RTS trigger
Level [7:5] When AFC bit is enabled, these bits determine when to inactivate
(High) nRTS signal.
000 = When RX FIFO contains 63 bytes.
001 = When RX FIFO contains 56 bytes.
010 = When RX FIFO contains 48 bytes.
011 = When RX FIFO contains 40 bytes.
100 = When RX FIFO contains 32 bytes.
101 = When RX FIFO contains 24 bytes.
110 = When RX FIFO contains 16 bytes.
111 = When RX FIFO contains 8 bytes.
000
Auto Flow
Control (AFC) [4] 0 = Disable
1 = Enable 0
Reserved [3:1] These bits must be 0's 00
Request to Send [0] If AFC bit is enabled, this value will be ignored. In this case the
S3C2450 will control nRTS automatically.
If AFC bit is disabled, nRTS must be controlled by software.
0 = 'H' level (Inactivate nRTS)
1 = 'L' level (Activate nRTS)
0
NOTES:
1. UART 3 does not support AFC function, because the S3C2450 has no nRTS3 and nCTS3.
2. If AFC bit is enabled and Time-out bit is disabled, RTS trigger level must be lager than Rx FIFO trigger level.
3. Example ) RX interrupt mode, RTS trigger level b101(24byte), RX FIFO trigger level b10(16byte).
This example shows RX FIFO always contains equal or less than 24 bytes.
(have space equal or larger than 40bytes.)
FIFO
contains
FIFO Spare
space nRTS
signal
Interrupt Note
24 byte 40 byte High - RTS trigger Level
23 byte 41 byte Low -
… … Low -
17 byte 47 byte Low -
16 byte 48 byte Low Occur RX FIFO trigger Level
15 byte 49 byte Low -
S3C2450X RISC MICROPROCESSOR UART
15-17
3.5 UART TX/RX STATUS REGISTER
There are four UART Tx/Rx status registers including UTRSTAT0, UTRSTAT1, UTRSTAT2 and UTRSTAT3 in
the UART block.
Register Address R/W Description Reset Value
UTRSTAT0 0x50000010 R UART channel 0 Tx/Rx status register 0x6
UTRSTAT1 0x50004010 R UART channel 1 Tx/Rx status register 0x6
UTRSTAT2 0x50008010 R UART channel 2 Tx/Rx status register 0x6
UTRSTAT3 0x5000C010 R UART channel 3 Tx/Rx status register 0x6
UTRSTATn Bit Description Initial State
Transmitter
empty [2] Set to 1 automatically when the transmit buffer register has no
valid data to transmit and the transmit shift register is empty.
0 = Not empty
1 = Transmitter (transmit buffer & shifter register) empty
1
Transmit buffer
empty [1] Set to 1 automatically when transmit buffer register is empty.
0 =The buffer register is not empty
1 = Empty
(In Non-FIFO mode, Interrupt or DMA is requested.
In FIFO mode, Interrupt or DMA is requested, when Tx
FIFO Trigger Level is set to 00 (Empty))
If the UART uses the FIFO, users should check Tx FIFO Count
bits and Tx FIFO Full bit in the UFSTAT register instead of this
bit.
1
Receive buffer
data ready [0] Set to 1 automatically whenever receive buffer register contains
valid data, received over the RXDn port.
0 = Empty
1 = The buffer register has a received data
(In Non-FIFO mode, Interrupt or DMA is requested)
If the UART uses the FIFO, users should check Rx FIFO Count
bits and Rx FIFO Full bit in the UFSTAT register instead of this
bit.
0
UART S3C2450X RISC MICROPROCESSOR
15-18
3.6 UART ERROR STATUS REGISTER
There are four UART Rx error status registers including UERSTAT0, UERSTAT1, UERSTAT2 and UERSTAT3 in
the UART block.
Register Address R/W Description Reset Value
UERSTAT0 0x50000014 R UART channel 0 Rx error status register 0x0
UERSTAT1 0x50004014 R UART channel 1 Rx error status register 0x0
UERSTAT2 0x50008014 R UART channel 2 Rx error status register 0x0
UERSTAT3 0x5000C014 R UART channel 3 Rx error status register 0x0
UERSTATn Bit Description Initial State
Break Detect [3] Set to 1 automatically to indicate that a break signal has been
received.
0 = No break receive
1 = Break receive (Interrupt is requested.)
0
Frame Error [2] Set to 1 automatically whenever a frame error occurs during
receive operation.
0 = No frame error during receive
1 = Frame error (Interrupt is requested.)
0
Parity Error [1] Set to 1 automatically whenever a parity error occurs during
receive operation.
0 = No parity error during receive
1 = Parity error (Interrupt is requested.)
0
Overrun Error [0] Set to 1 automatically whenever an overrun error occurs during
receive operation.
0 = No overrun error during receive
1 = Overrun error (Interrupt is requested.)
0
NOTE: These bits (UERSATn[3:0]) are automatically cleared to 0 when the UART error status register is read.
S3C2450X RISC MICROPROCESSOR UART
15-19
3.7 UART FIFO STATUS REGISTER
There are four UART FIFO status registers including UFSTAT0, UFSTAT1 UFSTAT2 and UFSTAT3 in the UART
block.
Register Address R/W Description Reset Value
UFSTAT0 0x50000018 R UART channel 0 FIFO status register 0x00
UFSTAT1 0x50004018 R UART channel 1 FIFO status register 0x00
UFSTAT2 0x50008018 R UART channel 2 FIFO status register 0x00
UFSTAT3 0x5000C018 R UART channel 3 FIFO status register 0x00
UFSTATn Bit Description Initial State
Reserved [15]
− 0
Tx FIFO Full [14] Set to 1 automatically whenever transmit FIFO is full during
transmit operation
0 = 0-byte ≤ Tx FIFO data ≤ 63-byte
1 = Full
0
Tx FIFO Count [13:8] Number of data in Tx FIFO 0
Reserved [7]
− 0
Rx FIFO Full [6] Set to 1 automatically whenever receive FIFO is full during
receive operation
0 = 0-byte ≤ Rx FIFO data ≤ 63-byte
1 = Full
0
Rx FIFO Count [5:0] Number of data in Rx FIFO 0
UART S3C2450X RISC MICROPROCESSOR
15-20
3.8 UART MODEM STATUS REGISTER
There are three UART modem status registers including UMSTAT0, UMSTAT1 in the UART block.
Register Address R/W Description Reset Value
UMSTAT0 0x5000001C R UART channel 0 modem status register 0x0
UMSTAT1 0x5000401C R UART channel 1 modem status register 0x0
UMSTAT2 0x5000801C R UART channel 2 modem status register 0x0
UMSTAT0 Bit Description Initial State
Delta CTS [4] Indicate that the nCTS input to the S3C2450 has changed state
since the last time it was read by CPU.
(Refer to Figure 15-8.)
0 = Has not changed
1 = Has changed
0
Reserved [3:1]
− 0
Clear to Send [0] 0 = CTS signal is not activated (nCTS pin is high)
1 = CTS signal is activated (nCTS pin is low) 0
nCTS
Delta CTS
Read_UMSTAT
Figure 15-8. nCTS and Delta CTS Timing Diagram
S3C2450X RISC MICROPROCESSOR UART
15-21
3.9 UART TRANSMIT BUFFER REGISTER (HOLDING REGISTER & FIFO REGISTER)
There are four UART transmit buffer registers including UTXH0, UTXH1, UTXH2 and UTXH3 in the UART block.
UTXHn has an 8-bit data for transmission data.
Register Address R/W Description Reset Value
UTXH0 0x50000020 W (by byte) UART channel 0 transmit buffer register −
UTXH1 0x50004020 W (by byte) UART channel 1 transmit buffer register −
UTXH2 0x50008020 W (by byte) UART channel 2 transmit buffer register −
UTXH3 0x5000C020 W (by byte) UART channel 3 transmit buffer register −
UTXHn Bit Description Initial State
TXDATAn [7:0] Transmit data for UARTn −
3.10 UART RECEIVE BUFFER REGISTER (HOLDING REGISTER & FIFO REGISTER)
There are four UART receive buffer registers including URXH0, URXH1, URXH2 and URXH3 in the UART block.
URXHn has an 8-bit data for received data.
Register Address R/W Description Reset Value
URXH0 0x50000024 R (by byte) UART channel 0 receive buffer register −
URXH1 0x50004024 R (by byte) UART channel 1 receive buffer register −
URXH2 0x50008024 R (by byte) UART channel 2 receive buffer register −
URXH3 0x5000C024 R (by byte) UART channel 3 receive buffer register −
URXHn Bit Description Initial State
RXDATAn [7:0] Receive data for UARTn –
NOTE: When an overrun error occurs, the URXHn must be read. If not, the next received data will also make an overrun
error, even though the overrun bit of UERSTATn had been cleared.
UART S3C2450X RISC MICROPROCESSOR
15-22
3.11 UART BAUD RATE DIVISOR REGISTER
There are four UART baud rate divisor registers including UBRDIV0, UBRDIV1, UBRDIV2 and UBRDIV3 in the
UART block.
Register Address R/W Description Reset Value
UBRDIV0 0x50000028 R/W Baud rate divisior(integer place) register 0 −
UBRDIV1 0x50004028 R/W Baud rate divisior(integer place) register 1 −
UBRDIV2 0x50008028 R/W Baud rate divisior(integer place) register 2 −
UBRDIV3 0x5000C028 R/W Baud rate divisior(integer place) register 3 −
UBRDIVn Bit Description Initial State
UBRDIV [15:0] Baud rate division value of integer part
(When UART clock source is PCLK, UBRDIVn must be more
than 0 (UBRDIVn >0))
−
NOTE: If UBRDIV value is 0, UART baudrate is not affected by UDIVSLOT value.
S3C2450X RISC MICROPROCESSOR UART
15-23
3.12 UART DIVIDING SLOT REGISTER
There are four UART dividing slot registers including UDIVSLOT0, UDIVSLOT 1, UDIVSLOT 2 and UDIVSLOT in
the UART block.
Register Address R/W Description Reset Value
UDIVSLOT0 0x5000002C R/W Baud rate divisior(decimal place) register 0 0x0000
UDIVSLOT1 0x5000402C R/W Baud rate divisior(decimal place) register 1 0x0000
UDIVSLOT2 0x5000802C R/W Baud rate divisior(decimal place) register 2 0x0000
UDIVSLOT3 0x5000C02C R/W Baud rate divisior(decimal place) register 3 0x0000
UDIVSLOTn Bit Description Initial State
UDIVSLOT [15:0] Select the slot number in Table 15-4 −
Table 15-4. Recommended Value Table of DIVSLOTn Register
Floating point part Num of 1’s UDIVSLOTn
0 0 0x0000(0000_0000_0000_0000b)
0.0625 1 0x0080(0000_0000_0000_1000b)
0.125 2 0x0808(0000_1000_0000_1000b)
0.1875 3 0x0888(0000_1000_1000_1000b)
0.25 4 0x2222(0010_0010_0010_0010b)
0.3125 5 0x4924(0100_1001_0010_0100b)
0.375 6 0x4A52(0100_1010_0101_0010b)
0.4375 7 0x54AA(0101_0100_1010_1010b)
0.5 8 0x5555(0101_0101_0101_0101b)
0.5625 9 0xD555(1101_0101_0101_0101b)
0.625 10 0xD5D5(1101_0101_1101_0101b)
0.6875 11 0xDDD5(1101_1101_1101_0101b)
0.75 12 0xDDDD(1101_1101_1101_1101b)
0.8125 13 0xDFDD(1101_1111_1101_1101b)
0.875 14 0xDFDF(1101_1111_1101_1111b)
0.9375 15 0xFFDF(1111_1111_1101_1111b)
UART S3C2450X RISC MICROPROCESSOR
15-24
NOTES
S3C2450X RISC MICROPROCESSOR USB HOST CONTROLLER
16-1
16 USB HOST CONTROLLER
1 OVERVIEW
S3C2450 supports 2-port USB host interface as follows:
• OHCI Rev 1.0 compatible
• USB Rev1.1 compatible
• Two down stream ports
• Support for both LowSpeed and FullSpeed USB devices
HCI
SLAVE
BLOCK
APP_SADR(8)
APP_SDATA(32)
HCI_DATA(32)
CONTROL
CONTROL
OHCI
REGS
USB
STATE
CONTROL
LIST
PROCESSOR
BLOCK
ED&TD
REGS
Cntl
HCI
MASTER
BLOCK
CONTROL
ED/TD_DATA(32)
ED/TD
STATUS(32)
64x8
FIFO
Cntl
HC_DATA(8)
DF_DATA(8)
APP_MDATA(32)
HCM_ADR/
DATA(32)
CONTROL STATUS
CONTROL
CTRL
CTRL
RH_DATA(8)
DF_DATA(8)
HCF_DATA(8)
Addr(6)
FIFO_DATA(8)
64x8
FIFO
ROOT
HUB
&
HOST
SIE
HSIE
S/M
DPLL
ROOT
HUB
&
HOST
SIE
OHCI
ROOT HUB
REGS
PORT
S/M
PORT
S/M
PORT
S/M
X
V
R
USB
1
X
V
R
USB
2
HCI
BUS
EXT.FIFO STATUS
RCF0_RegData(32)
TxEnl
TxDpls
TxDmns
RcvData
RcvDpls
RcvDmns
Figure 16-1. USB Host Controller Block Diagram
USB HOST CONTROLLER S3C2450X RISC MICROPROCESSOR
16-2
1.1 USB HOST CONTROLLER SPECIAL REGISTERS
The S3C2450 USB host controller complies with OHCI Rev 1.0. Refer to Open Host Controller Interface Rev 1.0
specification for detail information.
Table 16-1. OHCI Registers for USB Host Controller
Register Base Address R/W Description Reset Value
HcRevision 0x49000000
− Control and status group −
HcControl 0x49000004
− −
HcCommonStatus 0x49000008
− −
HcInterruptStatus 0x4900000C
− −
HcInterruptEnable 0x49000010
− −
HcInterruptDisable 0x49000014
− −
HcHCCA 0x49000018
− Memory pointer group −
HcPeriodCuttentED 0x4900001C
− −
HcControlHeadED 0x49000020
− −
HcControlCurrentED 0x49000024
− −
HcBulkHeadED 0x49000028
− −
HcBulkCurrentED 0x4900002C
− −
HcDoneHead 0x49000030
− −
HcRmInterval 0x49000034
− Frame counter group −
HcFmRemaining 0x49000038
− −
HcFmNumber 0x4900003C
− −
HcPeriodicStart 0x49000040
− −
HcLSThreshold 0x49000044
− −
HcRhDescriptorA 0x49000048
− Root hub group −
HcRhDescriptorB 0x4900004C
− −
HcRhStatus 0x49000050
− −
HcRhPortStatus1 0x49000054
− −
HcRhPortStatus2 0x49000058
− −
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-1
17 USB 2.0 FUNCTION
1 OVERVIEW
The Samsung USB 2.0 Controller is designed to aid the rapid implementation of the USB 2.0 peripheral device.
The controller supports both High and Full speed mode. Using the standard UTMI interface and AHB interface the
USB 2.0 Controller can support up to 9 Endpoints (including Endpoint0) with programmable Interrupt, Bulk mode.
1.1 FEATURE
• Compliant to USB 2.0 specification
• Supports FS/HS dual mode operation
• EP 0 FIFO: 64 bytes.
• EP 1/2/3/4 FIFO: 512 bytes double buffering
• EP 5/6/7/8 FIFO: 1024 bytes double buffering
• Convenient Debugging
• Support Interrupt, Bulk, Transfer
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-2
2 BLOCK DIAGRAM
DP
DM
UTMI Interface
Serial Interface
AHB
Master/Slave
Interface
AHB
Master/Slave
Interface
PHY Control Signal
PHY Clock
(48Mhz or
30Mhz)
PHY Clock
(30Mhz)
PHY or Internal
Clock
(48Mhz)
Internal Clock
(48Mhz)
System
Controller
SFR setting
USB 2.0 Function
USB 2.0 PHY
Control Block
USB 1.1
Host
USB 2.0
PHY
External
USB HOST
or Device
Serial Interface 2
USB 1.1
Transceiver
DP
DN
Figure 17-1. USB2.0 Block Diagram
USB2.0 Function has a AHB Slave which provides the microcontroller with read and write access to the Control
and Status Registers. And also Function has an AHB Master to enable the link to transfer data on the AHB. The
S3C2450 USB system shown as Figure 17-1, can be configured as following :
1. USB 1.1 Host 1 Port & USB 2.0 Device 1 Port
2. USB 1.1 Host 2 Ports
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-3
3 TO ACTIVATE USB PORT1 FOR USB 2.0 FUNCTION
USB Function block of S3C2450 shares USB PORT1 with USB Host block. To activate USB PORT1 for USB
Function, see USB control registers in System Controller Guide
UTMI Interface
AHB Slave Interface
AHB Master Interface
UPH SIE UTMI
FIFO BLOCK
Figure 17-2. USB2.0 Function Block Diagram
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-4
4 SIE (SERIAL INTERFACE ENGINE)
This block handles NRZI decoding/encoding, CRC generation and checking, and bit-stuffing. It also provides the
interface signals for USB Transceiver.
5 UPH (UNIVERSAL PROTOCOL HANDLER)
This block includes state machines and FIFO control, control/status register and DMA control block of each
direction endpoint.
6 UTMI (USB 2.0 TRANSCEIVER MACROCELL INTERFACE)
UTMI interface block connects 16 bit data bus and control signals to USB 2.0 PHY.
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-5
7 USB 2.0 FUNCTION CONTROLLER SPECIAL REGISTERS
The USB 2.0 controller includes several 16-bit registers for the endpoint programming and debugging. The
registers can be grouped into two categories. Few of the indexed registers are related to endpoint 0, but most of
them are utilized for the control and status monitoring of each data endpoint, including FIFO control and packet
size configuration. The buffer register for TX/RX data buffering also belong to the indexed register/
The non-indexed registers are mainly used for the control and status checking of the system. The control and
status registers of endpoint0 belong to these non-indexed registers.
Table 17-1. Non-Indexed Registers
Register Address R/W Description
IR 0x4980_0000 R/W Index Register
EIR 0x4980_0004 R/W Endpoint Interrupt Register
EIER 0x4980_0008 R/W Endpoint Interrupt Enable Register
FAR 0x4980_000C R Function Address Register
EDR 0x4980_0014 R/W Endpoint Direction Register
TR 0x4980_0018 R/W Test Register
SSR 0x4980_001C R/W System Status Register
SCR 0x4980_0020 R/W System Control Register
EP0SR 0x4980_0024 R/W EP0 Status Register
EP0CR 0x4980_0028 R/W EP0 Control Register
EP0BR 0x4980_0060 R/W EP0 Buffer Register
EP1BR 0x4980_0064 R/W EP1 Buffer Register
EP2BR 0x4980_0068 R/W EP2 Buffer Register
EP3BR 0x4980_006C R/W EP3 Buffer Register
EP4BR 0x4980_0070 R/W EP4 Buffer Register
EP5BR 0x4980_0074 R/W EP5 Buffer Register
EP6BR 0x4980_0078 R/W EP6 Buffer Register
EP7BR 0x4980_007C R/W EP7 Buffer Register
EP8BR 0x4980_0080 R/W EP8 Buffer Register
FCON 0x4980_0100 R/W Burst FIFO-DMA Control
FSTAT 0x4980_0104 R/W Burst FIFO status
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-6
Table 17-2. Indexed Registers
Register Address R/W Description
ESR 0x4980_002C R/W Endpoints Status Register
ECR 0x4980_0030 R/W Endpoints Control Register
BRCR 0x4980_0034 R Byte Read Count Register
BWCR 0x4980_0038 R/W Byte Write Count Register
MPR 0x4980_003C R/W Max Packet Register
DCR 0x4980_0040 R/W DMA Control Register
DTCR 0x4980_0044 R/W DMA Transfer Counter Register
DFCR 0x4980_0048 R/W DMA FIFO Counter Register
DTTCR1 0x4980_004C R/W DMA Total Transfer Counter1 Register
DTTCR2 0x4980_0050 R/W DMA Total Transfer Counter2 Register
MICR 0x4980_0084 R/W Master Interface Control Register
MBAR 0x4980_0088 R/W Memory Base Address Register
MCAR 0x4980_008C R/W Memory Current Address Register
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-7
8 REGISTERS
8.1 INDEX REGISTER (IR)
The index register is used for indexing a specific endpoint. In most cases, setting the index register value should
precede any other operation.
Register Address R/W Description Reset Value
IR 0x4980_0000 R/W Index Register 0x00
IR Bit R/W Description Initial State
[31:16]
− Reserved 0000
[15:4]
− Reserved (Don’t write to this field) 0
INDEX [3:0] R/W Endpoint Number Select (0~6)
0000 = Endpoint0
0001 = Endpoint1
0010 = Endpoint2
0011 = Endpoint3
0100 = Endpoint4
0101 = Endpoint5
0110 = Endpoint6
0111 = Endpoint7
1000 = Endpoint8
0000
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-8
8.2 ENDPOINT INTERRUPT REGISTER (EIR)
The endpoint interrupt register lets the MCU knows what endpoint generates the interrupt. The source of an
interrupt could be various, but, when an interrupt is detected, the endpoint status register should be checked to
identify if it’s related to specific endpoint. Clearing the bits can be accomplished by writing “1” to the bit position
where the interrupt is detected.
Register Address R/W Description Reset Value
EIR 0x4980_0004 R/C Endpoint Interrupt Register 0x00
EIR Bit R/W Description Initial State
[31:9]
− Reserved 0
EP8I [8] R/C Endpoint 8 Interrupt Flag 0
EP7I [7] R/C Endpoint 7 Interrupt Flag 0
EP6I [6] R/C Endpoint 6 Interrupt Flag 0
EP5I [5] R/C Endpoint 5 Interrupt Flag 0
EP4I [4] R/C Endpoint 4 Interrupt Flag 0
EP3I [3] R/C Endpoint 3 Interrupt Flag 0
EP2I [2] R/C Endpoint 2 Interrupt Flag 0
EP1I [1] R/C Endpoint 1 Interrupt Flag 0
EP0I [0] R/C Endpoint 0 Interrupt Flag 0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-9
8.3 ENDPOINT INTERRUPT ENABLE REGISTER (EIER)
Pairing with interrupt register, this register enables interrupt for each endpoints.
Register Address R/W Description Reset Value
EIER 0x4980_0008 R/W Endpoint interrupt enable register 0x00
EIER Bit R/W Description Initial State
[31:9]
− Reserved
EP8IE [8] R/W Endpoint 8 Interrupt Enable Flag 0
EP7IE [7] R/W Endpoint 7 Interrupt Enable Flag 0
EP6IE [6] R/W Endpoint 6 Interrupt Enable Flag 0
EP5IE [5] R/W Endpoint 5 Interrupt Enable Flag 0
EP4IE [4] R/W Endpoint 4 Interrupt Enable Flag 0
EP3IE [3] R/W Endpoint 3 Interrupt Enable Flag 0
EP2IE [2] R/W Endpoint 2 Interrupt Enable Flag 0
EP1IE [1] R/W Endpoint 1 Interrupt Enable Flag 0
EP0IE [0] R/W Endpoint 0 Interrupt Enable Flag
1 = EP0 Interrupt flag enable
0 = EP0 Interrupt flag disable
0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-10
8.4 FUNCTION ADDRESS REGISTER (FAR)
This register holds the address of USB device.
Register Address R/W Description Reset Value
FAR 0x4980_000C R Function address register 0x0
FAR Bit R/W Description Initial State
[31:7]
− Reserved
FA [6:0] R MCU can read a unique USB function address from this
register. The address is transferred from USB Host through
“set_address” command.
7’h0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-11
8.5 ENDPOINT DIRECTION REGISTER (EDR)
USB 2.0 Core supports IN/OUT direction control for each endpoint. This direction can’t be changed dynamically.
Only by new enumeration, the direction can be altered. Since the endpoint 0 is bi-directional, there is no direction
bit assigned to it.
Register Address R/W Description Reset Value
EDR 0x4980_0014 R/W Endpoint direction register 0x0
EDR Bit R/W Description Initial State
[31:9]
− Reserved
EP8DS [8] R/W Endpoint 8 Direction Select 0
EP7DS [7] R/W Endpoint 7 Direction Select 0
EP6DS [6] R/W Endpoint 6 Direction Select 0
EP5DS [5] R/W Endpoint 5 Direction Select 0
EP4DS [4] R/W Endpoint 4 Direction Select 0
EP3DS [3] R/W Endpoint 3 Direction Select 0
EP2DS [2] R/W Endpoint 2 Direction Select 0
EP1DS [1] R/W Endpoint 1 Direction Select
0 = Rx Endpoint
1 = Tx Endpoint
0
[0]
− Reserved
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-12
8.6 TEST REGISTER (TR)
The test register is used for the diagnostics. All bit are activated when 1 is written to and is cleared by 0 on them.
Bit[3:0] are for the high speed device only.
Register Address R/W Description Reset Value
TR 0x4980_0018 R/W Test register 0x0
TR Bit R/W Description Initial State
[31:5]
− Reserved
TMD [4] R/W Test Mode.
When TMD is set to 1. The core is forced into the test mode.
Following TPS, TKS, TJS, TSNS bits are meaningful in test
mode.
0
TPS [3] R/W Test Packets.
If this bit is set, the USB repetitively transmit the test
packets to Host.
The test packets are explained in 7.1.20 of USB 2.0
specification.
This bit can be set when TMD bit is set.
0
TKS [2] R/W Test K Select.
If this bit is set, the transceiver port enters into the high-
speed K state.
This bit can be set when TMD bit is set.
0
TJS [1] R/W Test J Select.
If this bit is set, the transceiver port enters into the high-
speed J state.
This bit can be set when TMD bit is set.
0
TSNS [0] R/W Test SE0 NAK Select
If this bit is set, the transceiver enters into the high speed
receive mode and must respond to any IN token with NAK
handshake.
This bit can be set when TMD bit is set.
0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-13
8.7 SYSTEM STATUS REGISTER (SSR)
This register reports operational status of the USB 2.0 Function Core, especially about error status and power
saving mode status. Except the line status, every status bits in the System Status Register could be an interrupt
sources. When the register is read after an interrupt due to certain system status changes, MCU should write
back 1 to the corresponding bits to clear it.
Register Address R/W Description Reset Value
SSR 0x4980_001C R/C Test register 0x0
SSR Bit R/W Description Initial State
[31:16]
− Reserved
BAERR [15] R/C Byte Align Error
If error interrupt enable bit of SCR register is set to 1,
BAERR is set to 1 when byte alignment error is detected.
0
TMERR [14] R/C Timeout Error
If error interrupt enable bit of SCR register is set to 1,
TMERR is set to 1 when timeout error is detected.
0
BSERR [13] R/C Bit Stuff Error
If error interrupt enable bit of SCR register is set to 1,
BSERR is set to 1 when bit stuff error is detected.
0
TCERR [12] R/C Token CRC Error
If error interrupt enable bit of SCR register is set to 1,
BSERR is set to 1 when CRC error in token packet is
detected.
0
DCERR [11] R/C Data CRC Error
If error interrupt enable bit of SCR register is set to 1,
DCERR is set to 1 when CRC error in data packet is
detected.
0
EOERR [10] R/C EB OVERRUN Error
If error interrupt enable bit of SCR register is set to 1,
EOERR is set to 1 when EB overrun error in transceiver is
detected.
0
[9:8]
− Reserved
TBM [7] R/C Toggle Bit Mismatch.
If error interrupt enable bit of SCR register is set to 1, TBM
is set to 1 when Toggle mismatch is detected.
0
DP [6] R DP Data Line State
DP informs the status of D+ Line 0
DM [5] R DM Data Line State
DM informs the status of D- Line 0
HSP [4] R Host Speed
0 = Full Speed
1 = High Speed
0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-14
SSR Bit R/W Description Initial State
SDE [3] R/C Speed Detection End.
SDE is set by the core when the HS Detect Handshake
process is ended.
0
HFRM [2] R/C Host Forced Resume.
HFRM is set by the core in suspend state when host sends
resume signaling.
0
HFSUSP [1] R/C Host Forced Suspend
HFSUSP is set by the core when the SUSPEND signaling
from host is detected.
0
HFRES [0] R/C Host Forced Reset.
HFRES is set by the core when the RESET signaling from
host is detected.
0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-15
8.8 SYSTEM CONTROL REGISTER (SCR)
This register enables top-level control of the core. MCU should access this register for controls such as Power
saving mode enable/disable.
Register Address R/W Description Reset Value
SCR 0x4980_0020 R/W System control register 0x0
SCR Bit R/W Description Initial State
[31:15]
− Reserved
DTZIEN [14] R/W DMA Total Counter Zero Interrupt Enable
0 = Disable
1 = Enable
When set to 1, DMA total counter zero interrupt is
generated.
0
[13]
− Reserved
DIEN [12] R/W DUAL Interrupt Enable
0 = Disable
1 = Enable
When set to 1, Interrupt is activated until Interrupt source is
cleared.
0
[11:9]
− Reserved
EIE [8] R/W Error Interrupt Enable
This bit must be set to 1 to enable error interrupt.
0
SPDCEN [7] R/W Speed detection Control Enable
0 = Disable
1 = Enable
0
SPDEN [6] R/W Speed Detect End Interrupt Enable
When set to 1, Speed detection interrupt is generated.
0
[5]
− Reserved
[4]
− Should be zero 0
SPDC [3] R/W Speed detection Control
Software can reset Speed detection Logic through this bit.
This bit is used to control speed detection process in case of
System with a long initial time.
0 = Enable
1 = Disable
0
MFRM [2] R/W Resume by MCU
If this bit is set, the suspended core generates a resume
signal. This bit is set when MCU writes 1. This bit is cleared
when MCU writes 0.
0
HSUSPE [1] R/W Suspend Enable
When set to 1, core can respond to the suspend signaling
by USB host.
0
HRESE [0] R/W Reset Enable
When set to 1, core can respond to the reset signaling by
USB host.
0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-16
8.9 EP0 STATUS REGISTER (EP0SR)
This register stores status information of the Endpoint 0. These status information are set automatically by the
core when corresponding conditions are met. After reading the bits, MCU should write 1 to clear them.
Register Address R/W Description Reset Value
EP0SR 0x4980_0024 R/W EP0 status register 0x0
EP0SR Bit R/W Description Initial State
[31:7]
− Reserved
LWO [6] R Last Word Odd
Low informs that the last word of a packet in FIFO has an
invalid upper byte.
This bit is cleared automatically after the MCU reads it from
the FIFO.
0
[5]
− Reserved
SHT [4] R/C Stall Handshake Transmitted.
SHT informs that STALL handshake due to stall condition is
sent to Host.
This bit is an interrupt source. This bit is cleared when the
MCU writes 1.
0
[3:2]
− Reserved
TST [1] R/C Tx successfully received.
TST is set by core after core sends TX data to Host and
receives ACK successfully. TST is one of the interrupt
sources.
0
RSR [0] R/C Rx successfully received.
RSR is set by core after core receives error free packet from
Host and sent ACK back to Host successfully.
RSR is one of the interrupt sources.
0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-17
8.10 EP0 CONTROL REGISTER (EP0CR)
EP0 control register is used for the control of endpoint 0. Controls such as enabling ep0 related interrupts and
toggle controls can be handled by EP0 control register.
Register Address R/W Description Reset Value
EP0CR 0x4980_0028 R/W EP0 control register 0x0
EP0CR Bit R/W Description Initial State
[31:2]
− Reserved
ESS [1] R/W Endpoint Stall Set
ESS is set by MCU when it intends to send STALL
handshake to Host.
This bit is cleared when the MCU writes 0 on it.
ESS is needed to be set 0 after MCU writes 1 on it.
0
TZLS [0] R/W Tx Zero Length Set.
TZLS is set by MCU when it intends to send Tx zero length
data to Host.
TZLS is useful for core Test.
TZLS can be managed when Tx Test Enable (TTE) bit is
set.
This bit is cleared when the MCU writes 0 on it
0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-18
8.11 ENDPOINT# BUFFER REGISTER (EP#BR)
The buffer register is used to hold data for TX/RX transfer.
Register Address R/W Description Reset Value
EP0BR 0x4980_0060 R/W EP0 Buffer Register 0x0
EP1BR 0x4980_0064 R/W EP1 Buffer Register 0x0
EP2BR 0x4980_0068 R/W EP2 Buffer Register 0x0
EP3BR 0x4980_006C R/W EP3 Buffer Register 0x0
EP4BR 0x4980_0070 R/W EP4 Buffer Register 0x0
EP5BR 0x4980_0074 R/W EP5 Buffer Register 0x0
EP6BR 0x4980_0078 R/W EP6 Buffer Register 0x0
EP7BR 0x4980_007C R/W EP7 Buffer Register 0x0
EP8BR 0x4980_0080 R/W EP8 Buffer Register 0x0
EP#BR Bit R/W Description Initial State
[31:16]
− Reserved
[15:0] R/W Buffer register holds TX/RX data between MCU and the
core 16hX
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-19
8.12 ENDPOINT STATUS REGISTER (ESR)
The endpoint status register reports current status of an endpoint (except EP0) to the MCU
Register Address R/W Description Reset Value
ESR 0x4980_002C R/W Endpoint status register 0x0
ESR Bit R/W Description Initial State
[31:12] Reserved
FPID [11] R/W First OUT Packet interrupt Disable in OUT DMA operation.
First Received OUT packet generates interrupt if this bit is
disabled and DEN in DMA control register is enabled
0 = Disable
1 = Enable
0
OSD [10] R/C OUT Start DMA Operation.
OSD is set when First OUT packet is received after
Registers related DMA Operation are set.
0
DTCZ [9] R/C DMA Total Count Zero
DTCZ is set when DMA Operation Total Counter reach to 0.
This bit is cleared when the MCU writes 1 on it.
0
SPT [8] R/C Short Packet Received.
SPT informs that OUT endpoint receives short packet during
OUT DMA Operation.
This bit is cleared when the MCU writes 1 on it.
0
DOM [7] R Dual Operation Mode
DOM is set when the max packet size of corresponding
endpoint is equal to a half FIFO size.
This bit is read only.
Endpoint0 does not support dual mode.
0
FFS [6] R/C FIFO Flushed.
FFS informs that FIFO is flushed.
This bit is an interrupt source.
This bit is cleared when the MCU clears FLUSH bit in
Endpoint Control Register.
0
FSC [5] R/C Function Stall Condition.
FSC informs that STALL handshake due to functional stall
condition is sent to Host.
This bit is set when endpoint stall set bit is set by the MCU.
This bit is cleared when the MCU writes 1 on it.
0
LWO [4] R Last Word Odd.
Low informs that the lower byte of last word is only valid.
This bit is automatically cleared after the MCU reads packet
data received Host.
0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-20
ESR Bit R/W Description Initial State
PSIF [3:2] R Packet Status In FIFO.
00 = No packet in FIFO
01 = One packet in FIFO
10 = Two packet in FIFO
11 = Invalid value
0
TPS [1] R/C Tx Packet Success
TPS is used for Single or Dual transfer mode.
TPS is activated when one packet data in FIFO was
successfully transferred to Host and received ACK from
Host.
This bit should be cleared by writing 1 on it after being read
by the MCU.
0
RPS [0] R Rx Packet Success.
RPS is used for Single or Dual transfer mode.
RPS is activated when the FIFO has a packet data to
receive. RPS is automatically cleared when MCU reads all
packets (one or two) from FIFO. MCU can identify the
packet size through byte read count register (BRCR).
0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-21
8.13 ENDPOINT CONTROL REGISTER (ECR)
The endpoint control register is useful for controlling an endpoint both in normal operation and test case. Putting
an endpoint in specific operation mode can be accomplished through the endpoint control register.
Register Address R/W Description Reset Value
ECR 0x4980_0030 R/W Endpoint Control Register 0x0
ECR Bit R/W Description Initial State
[31:13]
− Reserved
INPKTHLD [12] R/W The MCU can control Tx FIFO status through this bit. If this
bit is set to one, USB does not send IN data to Host.
0 = The USB can send IN data to Host according to
IN FIFO status(normal operation)
1 = The USB sends NAK handshake to Host
regardless of IN FIFO status.
0
OUTPKTHLD [11] R/W The MCU can control Rx FIFO Status through this bit. If this
bit is set to one, USB does not accept OUT data from Host.
0 = The USB can accept OUT data from Host
according to OUT FIFO status(normal operation)
1 = The USB does not accept OUT data from Host.
0
[10:8]
− Reserved
DUEN [7] R/W Dual FIFO mode Enable
0 = Dual Disable(Single mode)
1 = Dual Enable
0
FLUSH [6] R/W FIFO Flush
FIFO is flushed when this bit is set to 1.
This bit is automatically cleared after MCU writes 1.
0
[5:2]
− Reserved
ESS [1] R/W Endpoint Stall Set
ESS is set by the MCU when the MCU intends to send
STALL handshake to Host.
This bit is cleared when the MCU writes 0 in it.
0
IEMS [0] R/W Interrupt Endpoint Mode Set
IEMS determines the transfer type of an endpoint.
0 = Interrupt Transfer mode Disable
1 = Interrupt Transfer mode Enable
0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-22
8.14 BYTE READ COUNT REGISTER (BRCR)
The byte read count register keeps byte (half word) counts of a RX packet from USB host.
Register Address R/W Description Reset Value
BRCR 0x4980_0034 R Byte Read Count Register 0x0
BRCR Bit R/W Description Initial State
[31:10]
− Reserved
RDCNT [9:0] R FIFO Read Byte Count[9:0] RDCNT is read only. The BRCR
inform the amount of received data from host.
In 16-bit Interface, RDCNT informs the amount of data in
half word (16-bit) unit. Through the LWO bit of EP0SR, the
MCU can determine valid byte in last data word.
10’h
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-23
8.15 BYTE WRITE COUNT REGISTER (BWCR)
The byte write count register keeps the byte (half word) count value of a TX packet from MCU. The counter value
will be used to determine the end of TX packet.
Register Address R/W Description Reset Value
BWCR 0x4980_0038 R/W Byte Write Count Register 0x0
BWCR Bit R/W Description Initial State
[31:10]
− Reserved
WRCNT [9:0] R/W Through BWCR, the MCU must load the byte counts of a TX
data packet to the core. The core uses this count value to
determine the end of packet. The count value to this register
must be less than MAXP.
10’h
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-24
8.16 MAX PACKET REGISTER (MPR)
The byte write count register keeps the byte (half word) count value of a TX packet from MCU. The counter value
will be used to determine the end of TX packet.
Register Address R/W Description Reset Value
MPR 0x4980_003C R/W MAX Packet Register 0x0
MPR Bit R/W Description Initial State
[31:11]
− Reserved
MAXP [10:0] R/W MAX Packet [10:0]
The max packet size of each endpoint is determined by
MAX packet register. The range of max packet is from 0 to
1024 bytes.
000_0000_0000 = Max Packet 0 byte.
000_0000_1000 = Max Packet 8 bytes.
000_0001_0000 = Max Packet 16 bytes.
000_0010_0000 = Max Packet 32 bytes.
000_0100_0000 = Max Packet 64 bytes.
000_1000_0000 = Max Packet 128 bytes.
001_0000_0000 = Max Packet 256 bytes.
010_0000_0000 = Max Packet 512 bytes.
100_0000_0000 = Max Packet 1024 bytes.
11’h0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-25
8.17 DMA CONTROL REGISTER (DCR)
The AHB Master Operation is controlled by the programming DMA Control Register and DMA IF Control Register.
Register Address R/W Description Reset Value
DCR 0x4980_0040 R/W DMA Control Register 0x0
DCR Bit R/W Description Initial State
[31:6]
− Reserved
ARDRD [5] R/W Auto Rx DMA Run set disable.
0 = Set
1 = Disable
This bit is cleared when DMA operation is ended.
0
FMDE [4] R/W Burst Mode Enable.
This bit is used to run Burst Mode DMA Operation.
0 = Burst mode disable
1 = Burst mode enable
0
DMDE [3] R/W Demand Mode DMA Enable.
This bit is used to run Demand mode DMA operation.
0 = Demand mode disable.
1 = Demand mode enable.
0
TDR [2] R/W Tx DMA Operation Run
This bit is used to set start DMA operation for Tx Endpoint
(IN endpoint)
0 = DMA operation stop
1 = DMA operation run
0
RDR [1] R/W Rx DMA Operation Run
This bit is used to start DMA operation for Rx Endpoint
(OUT endpoint).
This bit is automatically set when USB receives OUT packet
data and DEN bit is set to 1 and ARDRD bit is set to 0.
To operate DMA operation after OUT packet data received,
MCU must set RDR to 1.
0 = DMA operation stop.
1 = DMA operation run.
0
DEN [0] R/W DMA Operation Mode Enable
This bit is used to set the DMA Operation mode
0 = Interrupt Operation mode
1 = DMA Operation mode
0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-26
8.18 DMA TRANSFER COUNTER REGISTER (DTCR)
The byte write count register keeps the byte (half word) count value of a TX packet from MCU. The counter value
will be used to determine the end of TX packet.
Register Address R/W Description Reset Value
DTCR 0x4980_0044 R/W DMA Transfer Counter Register 0x0
MTCR Bit R/W Description Initial State
[31:11] Reserved
DTCR [10:0] R/W To operate single mode transfer, DTCR is needed to be set
11’h0002. In case of Burst mode, the MCU should set max
packet value.
11’h0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-27
8.19 DMA FIFO COUNTER REGISTER (DFCR)
This register has the byte number of data per DMA operation.
The max packet size is loaded in this register.
Register Address R/W Description Reset Value
DFCR 0x4980_0048 R/W DMA FIFO Counter Register 0x0
MFCR Bit R/W Description Initial State
[31:12]
− Reserved
DFCR [11:0] R/W In case of OUT Endpoint, the size value of received packet
will be loaded in this register automatically when Rx DMA
Run is enabled.
In case of IN Endpoint, the MCU should set max packet
value.
12’h0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-28
8.20 DMA TOTAL TRANSFER COUNTER REGISTER 1/2 (DTTCR 1/2)
This register has the total byte number of data to transfer using DMA Interface.
When this counter register value is zero, DMA operation is ended.
Register Address R/W Description Reset Value
DTTCR1
DTTCR2 0x4980_004C
0x4980_0050 R/W DMA Total Transfer Counter Register 1/2 0x0
MTTCR# Bit R/W Description Initial State
[31:16] Reserved
DTTCR [15:0] R/W This register should have total byte size to be transferred
using DMA Interface.
DMA Total Transfer Counter1
: Low half word value
DMA Total Transfer Counter2
: High half word value.
The max value is up to 2^32
16’h0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-29
8.21 DMA INTERFACE CONTROL REGISTER (DICR)
The AHB Master Operation is controlled by the programming DMA Control Register and DMA IF Control Register.
Register Address R/W Description Reset Value
DICR 0x4980_0084 R/W DMA Interface Counter Register 0x0
DICR Bit R/W Description Initial State
Reserved [31:4]
− Reserved 0
RELOAD_
MBAR [4] R/W Select Reload Condiion
0 = Every end of Full DMA operation
1 = Every Packet transfer.
0
Reserved [3:2] Reserved 0
MAX_BURST [1:0] R/W Max Burst Length
00 = Single transfer
01 = 4-beat incrementing burst transfer(INCR4)
10 = 8-beat incrementing burst transfer(INCR8)
11 = 16-beat incrementing burst transfer(INCR16)
00
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-30
8.22 MEMORY BASE ADDRESS REGISTER (MBAR)
Register Address R/W Description Reset Value
MBAR 0x4980_0088 R/W Memory Base Address Register 0x0
MBAR# Bit R/W Description Initial State
MBAR [31:0] R/W This register should have memory base address to be
transferred using DMA Interface. 32’h0
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-31
8.23 MEMORY CURRENT ADDRESS REGISTER (MCAR)
Register Address R/W Description Reset Value
MCAR 0x4980_008C R Memory Current Address Register 0x0
MCAR# Bit R/W Description Initial State
MCAR [31:0] R This register should have memory current address to be
transferred using DMA Interface.
8.24 BURST FIFO CONTROL REGISTER(FCON)
Register Address R/W Description Reset Value
FCON 0x4980_0100 R/W Burst DMA transfer Control 0x0
MBAR# Bit R/W Description Initial State
Reserved [31:9] R/W Reserved 000000
DMAEN [8] R/W DMA enable 0
Rreserved [7:5] R/W Reserved 000
TF_CLR [4] R/W TX fifo clear 0
Reserved [3:1] R/W Reserved 000
RF_CLR [0] R/W RX fifo clear 0
8.25 BURST FIFO STATUS REGISTER(FSTAT)
Register Address R/W Description Reset Value
FSTAT 0x4980_0104 R/W Burst DMA transfer Status 0x0
FSTAT Bit R/W Description Initial State
Reserved [31:14] R Reserved
TF_FULL [13] R TX FIFO Full 0
TF_CNT [12:8] R # of data in TX fifo 0
Reserved [7:6] R Reserved 0
RF_FULL [5] R RX FIFO Full 0
RF_CNT [4:0] R # of data in RX fifo 0
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-32
8.26 AHB MASTER(DMA) OPERATION FLOW CHART
8.26.1 A. OUT Transfer Operation Flow
Total Transfer Counter in USB core is Zero?
USB Core receives OUT data from HOST PC and transfers to Memory.
AHB Master IF Registers (Unit Counter, Total Transfer Counter,
Control) are set in initial state or Interrupt service routine.
AHB Master IF Registers are to be set after MCU reads all data packets
from USB OUT FIFO to operate a AHB Master operation after interrupt
service mode.
Master Interface transfers data from OUT FIFO in USB core to Memory
AHB Master Operation is ended and Interrupt mode is On.
Figure 17-3. OUT Transfer Operation Flow
S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-33
8.26.2 B. IN Transfer Operation Flow
Total Transfer Counter in USB core is Zero?
USB Core receives IN TOKEN from Host PC and sends IN data to
HOST PC. If Host receives IN data successfully (Host send ACK
handshake), Master writes data to IN FIFO.
AHB Master Registers( Unit Counter, Total Transfer Counter, Control)
are set in intial state or Interrupt service routine.
AHB Master Registers are to be set after MCU writes one packet data
to USB IN FIFO to operate a AHB Master operation after interrupt
service mode
Master Controller writes to IN FIFO in USB Core from Memory.
AHB Master Operation is ended and Interrupt mode is On.
NO
YES
Figure 17-4. IN Transfer Operation Flow
USB2.0 DEVICE S3C2450X RISC MICROPROCESSOR
17-34
NOTES
S3C2450X RISC MICROPROCESSOR IIC-BUS INTERFACE
18-1
18 IIC-BUS INTERFACE
1 OVERVIEW
The S3C2450 RISC microprocessor can support two channels of multi-master IIC-bus serial interface. A
dedicated serial data line (SDA) and a serial clock line (SCL) carry information between bus masters and
peripheral devices which are connected to the IIC-bus. The SDA and SCL lines are bi-directional.
In multi-master IIC-bus mode, multiple S3C2450 RISC microprocessors can receive or transmit serial data to or
from slave devices. The master S3C2450 can initiate and terminate a data transfer over the IIC-bus. The IIC-bus
in the S3C2450 uses Standard bus arbitration procedure.
To control multi-master IIC-bus operations, values must be written to the following registers:
• Multi-master IIC-bus control register, IICCON
• Multi-master IIC-bus control/status register, IICSTAT
• Multi-master IIC-bus Tx/Rx data shift register, IICDS
• Multi-master IIC-bus address register, IICADD
When the IIC-bus is free, the SDA and SCL lines should be both at High level. A High-to-Low transition of SDA
can initiate a Start condition. A Low-to-High transition of SDA can initiate a Stop condition while SCL remains
steady at High Level.
The Start and Stop conditions can always be generated by the master devices. A 7-bit address value in the first
data byte, which is put onto the bus after the Start condition has been initiated, can determine the slave device
which the bus master device has selected. The 8th bit determines the direction of the transfer (read or write).
Every data byte put onto the SDA line should be eight bits in total. The bytes can be unlimitedly sent or received
during the bus transfer operation. Data is always sent from most-significant bit (MSB) first, and every byte should
be immediately followed by acknowledge (ACK) bit.
IIC-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
18-2
PCLK
Address Register
SDA
4-bit Prescaler
IIC-Bus Control Logic
IICSTATIICCON
Comparator
Shift Register
Shift Register
(IICDS)
Data Bus
SCL
Figure 18-1. IIC-Bus Block Diagram
S3C2450X RISC MICROPROCESSOR IIC-BUS INTERFACE
18-3
1.1 IIC-BUS INTERFACE
The S3C2450 IIC-bus interface has four operation modes:
• Master transmitter mode
• Master receive mode
• Slave transmitter mode
• Slave receive mode
Functional relationships among these operating modes are described below.
1.2 START AND STOP CONDITIONS
When the IIC-bus interface is inactive, it is usually in Slave mode. In other words, the interface should be in Slave
mode before detecting a Start condition on the SDA line (a Start condition can be initiated with a High-to-Low
transition of the SDA line while the clock signal of SCL is High). When the interface state is changed to Master
mode, a data transfer on the SDA line can be initiated and SCL signal generated.
A Start condition can transfer a one-byte serial data over the SDA line, and a Stop condition can terminate the
data transfer. A Stop condition is a Low-to-High transition of the SDA line while SCL is High. Start and Stop
conditions are always generated by the master. The IIC-bus gets busy when a Start condition is generated. A
Stop condition will make the IIC-bus free.
When a master initiates a Start condition, it should send a slave address to notify the slave device. One byte of
address field consists of a 7-bit address and a 1-bit transfer direction indicator (showing write or read).
If bit 8 is 0, it indicates a write operation (transmit operation); if bit 8 is 1, it indicates a request for data read
(receive operation).
The master will complete the transfer operation by transmitting a Stop condition. If the master wants to continue
the data transmission to the bus, it should generate another Start condition as well as a slave address. In this
way, the read-write operation can be performed in various formats.
SCL
SDA SDA
SCL
Start
Condition Stop
Condition
Figure 18-2. Start and Stop Condition
IIC-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
18-4
1.3 DATA TRANSFER FORMAT
Every byte placed on the SDA line should be eight bits in length. The bytes can be unlimitedly transmitted per
transfer. The first byte following a Start condition should have the address field. The address field can be
transmitted by the master when the IIC-bus is operating in Master mode. Each byte should be followed by an
acknowledgement (ACK) bit. The MSB bit of the serial data and addresses are always sent first.
NOTES:
1. S: Start, rS: Repeat Start, P: Stop, A: Acknowledge
2. : From Master to Slave, : From Slave to Master
Write Mode Format with 7-bit Addresses
"0"
(Write) Data Transferred
(Data + Acknowledge)
SSlave Address 7bits R/W A PDATA(1Byte) A
Read Mode Format with 7-bit Addresses
"1"
(Read) Data Transferred
(Data + Acknowledge)
SSlave Address 7 bits R/W A PDATA A
Figure 18-3. IIC-Bus Interface Data Format
S3C2450X RISC MICROPROCESSOR IIC-BUS INTERFACE
18-5
SDA
Acknowledgement
Signal from Receiver
SCL
S
12 789 12 9
Acknowledgement
Signal from Receiver
MSB
ACK
Byte Complete, Interrupt
within Receiver Clock Line Held Low by
receiver and/or transmitter
Figure 18-4. Data Transfer on the IIC-Bus
1.4 ACK SIGNAL TRANSMISSION
To complete a one-byte transfer operation, the receiver should send an ACK bit to the transmitter. The ACK pulse
should occur at the ninth clock of the SCL line. Eight clocks are required for the one-byte data transfer. The
master should generate the clock pulse required to transmit the ACK bit.
The transmitter should release the SDA line by making the SDA line High when the ACK clock pulse is received.
The receiver should also drive the SDA line Low during the ACK clock pulse so that the SDA keeps Low during
the High period of the ninth SCL pulse.
The ACK bit transmit function can be enabled or disabled by software (IICSTAT). However, the ACK pulse on the
ninth clock of SCL is required to complete the one-byte data transfer operation.
Data Output by
Transmitter
Data Output by
Receiver
SCL from
Master
Start
Condition Clock Pulse for Acknowledgment
Clock to Output
987
S1 2
Figure 18-5. Acknowledge on the IIC-Bus
IIC-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
18-6
1.5 READ-WRITE OPERATION
In Transmitter mode, when the data is transferred, the IIC-bus interface will wait until IIC-bus Data Shift (IICDS)
register receives a new data. Before the new data is written into the register, the SCL line will be held low, and
then released after it is written. The S3C2450 should hold the interrupt to identify the completion of current data
transfer. After the CPU receives the interrupt request, it should write a new data into the IICDS register, again.
In Receive mode, when data is received, the IIC-bus interface will wait until IICDS register is read. Before the new
data is read out, the SCL line will be held low and then released after it is read. The S3C2450 should hold the
interrupt to identify the completion of the new data reception. After the CPU receives the interrupt request, it
should read the data from the IICDS register.
1.6 BUS ARBITRATION PROCEDURES
Arbitration takes place on the SDA line to prevent the contention on the bus between two masters. If a master with
a SDA High level detects the other master with a SDA active Low level, it will not initiate a data transfer because
the current level on the bus does not correspond to its own. The arbitration procedure will be extended until the
SDA line turns High.
However, when the masters simultaneously lower the SDA line, each master should evaluate whether the
mastership is allocated itself or not. For the purpose of evaluation is that each master should detect the address
bits. While each master generates the slaver address, it should also detect the address bit on the SDA line
because the SDA line is likely to get Low rather than to keep High. Assume that one master generates a Low as
first address bit, while the other master is maintaining High. In this case, both masters will detect Low on the bus
because the Low status is superior to the High status in power. When this happens, Low (as the first bit of
address) generating master will get the mastership while High (as the first bit of address) generating master
should withdraw the mastership. If both masters generate Low as the first bit of address, there should be
arbitration for the second address bit, again. This arbitration will continue to the end of last address bit.
1.7 ABORT CONDITIONS
If a slave receiver cannot acknowledge the confirmation of the slave address, it should hold the level of the SDA
line High. In this case, the master should generate a Stop condition and to abort the transfer.
If a master receiver is involved in the aborted transfer, it should signal the end of the slave transmit operation by
canceling the generation of an ACK after the last data byte received from the slave. The slave transmitter should
then release the SDA to allow a master to generate a Stop condition.
1.8 CONFIGURING IIC-BUS
To control the frequency of the serial clock (SCL), the 4-bit prescaler value can be programmed in the IICCON
register. The IIC-bus interface address is stored in the IIC-bus address (IICADD) register. (By default, the IIC-bus
interface address has an unknown value.)
S3C2450X RISC MICROPROCESSOR IIC-BUS INTERFACE
18-7
1.9 FLOWCHARTS OF OPERATIONS IN EACH MODE
The following steps must be executed before any IIC Tx/Rx operations.
1. Write own slave address on IICADD register, if needed.
2. Set IICCON register.
a) Enable interrupt
b) Define SCL period
3. Set IICSTAT to enable Serial Output
Write slave address to
IICDS.
Write 0xF0 (M/T Start) to
IICSTAT.
The data of the IICDS is
transmitted.
ACK period and then
interrupt is pending.
Write 0xD0 (M/T Stop) to
IICSTAT.
Write new data transmitted
to IICDS.
Stop?
Clear pending bit to
resume.
The data of the IICDS is
shifted to SDA.
START
Master Tx mode has been
configured.
Clear pending bit .
Wait until the stop
condition takes effect.
END
Y
N
Figure 18-6. Operations for Master/Transmitter Mode
IIC-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
18-8
Write slave address to
IICDS.
Write 0xB0 (M/R Start) to
IICSTAT.
The data of the IICDS (slave
address) is transmitted.
ACK period and then
interrupt is pending.
Write 0x90 (M/R Stop) to
IICSTAT.
Read a new data from
IICDS.
Stop?
Clear pending bit to
resume.
SDA is shifted to IICDS.
START
Master Rx mode has been
configured.
Clear pending bit .
Wait until the stop
condition takes effect.
END
Y
N
Figure 18-7. Operations for Master/Receiver Mode
S3C2450X RISC MICROPROCESSOR IIC-BUS INTERFACE
18-9
IIC detects start signal. and, IICDS
receives data.
IIC compares IICADD and IICDS (the
received slave address).
Write data to IICDS.
The IIC address match
interrupt is generated.
Clear pending bit to
resume.
The data of the IICDS is
shifted to SDA.
START
Slave Tx mode has been
configured.
END
Matched?
N
Y
Stop?
Interrupt is pending.
N
Y
Figure 18-8. Operations for Slave/Transmitter Mode
IIC-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
18-10
IIC detects start signal. and, IICDS
receives data.
IIC compares IICADD and IICDS (the
received slave address).
Read data from IICDS.
The IIC address match
interrupt is generated.
Clear pending bit to
resume.
SDA is shifted to IICDS.
START
Slave Rx mode has been
configured.
END
Matched?
N
Y
Stop?
Interrupt is pending.
N
Y
Figure 18-9. Operations for Slave/Receiver Mode
S3C2450X RISC MICROPROCESSOR IIC-BUS INTERFACE
18-11
2 IIC-BUS INTERFACE SPECIAL REGISTERS
2.1 MULTI-MASTER IIC-BUS CONTROL (IICCON) REGISTER
Register Address R/W Description Reset Value
IICCON0 0x54000000 R/W IIC0-Bus control register 0x0X
IICCON1 0x54000100 R/W IIC1-Bus control register 0x0X
IICCON0
IICCON1 Bit Description Initial State
Acknowledge
generation
(note 1)
[7] IIC-bus acknowledge enable bit.
0 = Disable
1 = Enable
In Tx mode, the IICSDA is free in the ack time.
In Rx mode, the IICSDA is L in the ack time.
0
Tx clock source
selection [6] Source clock of IIC-bus transmit clock prescaler selection bit.
0 = IICCLK = PCLK /16
1 = IICCLK = PCLK /512
0
Tx/Rx Interrupt
(note 5)
[5] IIC-Bus Tx/Rx interrupt enable/disable bit.
0 = Disable, 1 = Enable
0
Interrupt pending
flag (note 2)
(note 3)
[4] IIC-bus Tx/Rx interrupt pending flag. This bit cannot be written to 1.
When this bit is read as 1, the IICSCL is tied to L and the IIC is
stopped. To resume the operation, clear this bit as 0.
0 = 1) No interrupt pending (when read).
2) Clear pending condition &
Resume the operation (when write).
1 = 1) Interrupt is pending (when read)
2) N/A (when write)
0
Transmit clock
value (note 4)
[3:0] IIC-Bus transmit clock prescaler.
IIC-Bus transmit clock frequency is determined by this 4-bit
prescaler value, according to the following formula:
Tx clock = IICCLK/(IICCON[3:0]+1).
Undefined
NOTES:
1. Interfacing with EEPROM, the ack generation may be disabled before reading the last data in order to generate the
STOP condition in Rx mode.
2. An IIC-bus interrupt occurs 1) when a 1-byte transmits or receives operation is completed, 2) when a general call or a
slave
address match occurs, or 3) if bus arbitration fails.
3. To adjust the setup time of SDA before SCL rising edge, IICDS has to be written before clearing the IIC interrupt
pending bit.
4. IICCLK is determined by IICCON[6].
Tx clock can vary by SCL transition time.
When IICCON[6]=0, IICCON[3:0]=0x0 or 0x1 is not available.
5. If the IICCON[5]=0, IICCON[4] does not operate correctly.
So, It is recommended that you should set IICCON[5]=1, although you does not use the IIC interrupt.
IIC-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
18-12
2.2 MULTI-MASTER IIC-BUS CONTROL/STATUS (IICSTAT) REGISTER
Register Address R/W Description Reset Value
IICSTAT0 0x54000004 R/W IIC0-Bus control/status register 0x0
IICSTAT1 0x54000104 R/W IIC1-Bus control/status register 0x0
IICSTAT0
IICSTAT1 Bit Description Initial State
Mode selection [7:6] IIC-bus master/slave Tx/Rx mode select bits.
00 = Slave receive mode
01 = Slave transmit mode
10 = Master receive mode
11 = Master transmit mode
00
Busy signal
status /
START STOP
condition
[5] IIC-Bus busy signal status bit.
0 = read) Not busy (when read)
write) STOP signal generation
1 = read) Busy (when read)
write) START signal generation.
The data in IICDS will be transferred automatically just
after
the start signal.
0
Serial output [4] IIC-bus data output enable/disable bit.
0 = Disable Rx/Tx
1 = Enable Rx/Tx
0
Arbitration status
flag [3] IIC-bus arbitration procedure status flag bit.
0 = Bus arbitration successful
1 = Bus arbitration failed during serial I/O
0
Address-as-
slave status flag [2] IIC-bus address-as-slave status flag bit.
0 = Cleared after reading of IICSTAT register
1 = Received slave address matches the address value in the
IICADD
0
Address zero
status flag [1] IIC-bus address zero status flag bit.
0 = Cleared when START/STOP condition was detected
1 = Received slave address is 00000000b.
0
Last-received bit
status flag [0] IIC-bus last-received bit status flag bit.
0 = Last-received bit is 0 (ACK was received).
1 = Last-received bit is 1 (ACK was not received).
0
S3C2450X RISC MICROPROCESSOR IIC-BUS INTERFACE
18-13
2.3 MULTI-MASTER IIC-BUS ADDRESS (IICADD) REGISTER
Register Address R/W Description Reset Value
IICADD0 0x54000008 R/W IIC0-Bus address register 0xXX
IICADD1 0x54000108 R/W IIC1-Bus address register 0xXX
IICADD0
IICADD1 Bit Description Initial State
Slave address [7:0] 7-bit slave address, latched from the IIC-bus.
When serial output enable = 0 in the IICSTAT, IICADD is write-
enabled. The IICADD value can be read any time, regardless of the
current serial output enable bit (IICSTAT) setting.
Slave address : [7:1]
Not mapped : [0]
XXXXXXXX
2.4 MULTI-MASTER IIC-BUS TRANSMIT/RECEIVE DATA SHIFT (IICDS) REGISTER
Register Address R/W Description Reset Value
IICDS0 0x5400000C R/W IIC0-Bus transmit/receive data shift register 0xXX
IICDS1 0x5400010C R/W IIC1-Bus transmit/receive data shift register 0xXX
IICDS0
IICDS1 Bit Description Initial State
Data shift [7:0] 8-bit data shift register for IIC-bus Tx/Rx operation.
When serial output enable = 1 in the IICSTAT, IICDS is write-
enabled. The IICDS value can be read any time, regardless of the
current serial output enable bit (IICSTAT) setting.
XXXXXXXX
IIC-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
18-14
2.5 MULTI-MASTER IIC-BUS LINE CONTROL(IICLC) REGISTER
Register Address R/W Description Reset Value
IICLC0 0x54000010 R/W IIC0-Bus multi-master line control register 0x00
IICLC1 0x54000110 R/W IIC1-Bus multi-master line control register 0x00
IICLC0
IICLC1 Bit Description Initial State
Filter enable [2] IIC-bus filter enable bit.
When SDA port is operating as input, this bit should be High. This
filter can prevent from occurred error by a glitch during double of
PCLK time.
0 = Filter disable
1 = Filter enable
0
SDA output
delay [1:0] IIC-Bus SDA line delay length selection bits.
SDA line is delayed as following clock time(PCLK)
00 = 0 clocks
01 = 5 clocks
10 = 10 clocks
11 = 15 clocks
00
S3C2450X RISC MICROPROCESSOR 2D
19-1
19 2D
1 INTRODUCTION
2D graphics accelerator supports three types of primitive drawings: Line/Point Drawing, Bit Block Transfer
(BitBLT) and Color Expansion (Text Drawing).
Rendering a primitive takes two steps: 1) configure the rendering parameters, such as foreground color and the
coordinate data, by setting the drawing-context registers; 2) start the rendering process by setting the relevant
command registers accordingly.
1.1 FEATURES
1.1.1 Primitives
• Line/Point Drawing
- DDA ( Digital Differential Analyzer) algorithm
- Do-Not-Draw Last Point support
• BitBLT
- Stretched BitBLT support ( Nearest sampling )
- Memory to Screen
- Host to Screen
• Color Expansion
- Memory to Screen
- Host to Screen
1.1.2 Per-pixel Operation
• Maximum 2040*2040 image size
• Window Clipping
• 90°/180°/270°/X-flip/Y-flip Rotation
• Totally 256 3-operand Raster Operation (ROP)
• Alpha Blending
- Alpha Blending with a user-specified 256-level
alpha value
- Per-pixel Alpha Blending
• 8x8x16-bpp pattern drawing
1.1.3 Data Format
• 16/24/32-bpp color format support
• YUV input support (4:2:2, 2-planar)
• 11.11 fixed point format for coordinate data
2D S3C2450X RISC MICROPROCESSOR
19-2
2 COLOR FORMAT CONVERSION
2D supports seven color formats: RGB_565, RGBA_5551, ARGB_1555, RGBA_8888, ARGB_8888, XRGB_8888,
and RGBX_8888. The structure of each color format is illustrated in Figure 19-1.
R G B
R G B A
15 10 5 0
15 10 6 1 0
R G BA
15 14 10 5 0
G B AR
31 24 16 8 0
R G BA
31 24 16 8 0
R G B0xFF
31 24 16 8 0
G B 0xFFR
31 24 16 8 0
RGB_565
RGBA_5551
ARGB_1555
RGBA_8888
ARGB_8888
XRGB_8888
RGBX_8888
Figure 19-1. Color Format
The internal computations use ARGB_8888 format. All data (source, destination, foreground, background, blue-
screen, pattern) are converted to ARGB_8888 format before computation, and the final result are converted to the
color format specified by DEST_COLOR_MODE_REG before writing to frame buffer.
When a 16-bit color data is converted to 32-bit, the data of each field is shifted (8 – x) bits to left, where x is the
bit-width of the field. The least significant x bits of the new field data are padded with the most significant x bits of
the original field data. For example, if the R value in RGB_565 format is 5’b11010, it will be converted to
8’b11010110, with three LSBs padded with three MSBs (3’b110) from the original R value. Note that, the A field in
RGBA_5551 and ARGB_1555 only has one bit, so it is converted to either 8’b00000000 or 8’b11111111 (A=1’b1).
When a 32-bit color data is converted to 16-bit, the data of each field is truncated to x bits, where x is the bit-width
of the field in the new color format. For example, if the R value in RGBA_8888 format is 8’b11001110, it will be
converted to 5’b11001 in the RGB_565 format, with the three LSBs discarded. Note that, if the A field of the 32-bit
color data is not 0, the A field in RGBA_5551 and ARGB_1555 will be 1’b1; otherwise, 1’b0.
2D also supports YUV input (format: YUV422, 2-planar). The memory allocation of a 16-pixel image of YUV422
format is illustrated in Figure 19-2. Note that when YUV format is used, the source image horizontal resolution
must be an even number.
S3C2450X RISC MICROPROCESSOR 2D
19-3
YYYYYYYY
YYYYYYYY
U V U V U V U V
U V U V U V U V
YUV422
2-Planar
Figure 19-2. YUV 2-Planar Format
3 COMMAND FIFO
2D has a 32-word command FIFO. Every data written to command registers and parameter setting registers will
be written to the FIFO first. If the graphics engine is idle (no command is being executed), the data will be written
to the designated register in one cycle; otherwise, the data will be stored in the FIFO and wait to be dispatched
after the current rendering process completes.
It is user’s responsibility to make sure that the data written to the FIFO do not exceed its maximum capacity. User
can monitor the number of data entries used in FIFO by reading FIFO_USED bits in FIFO_STAT_REG, or ask
graphics engine to give an interrupt signal when the number of entries in FIFO reaches a certain level by setting
FIFO_INTC_REG and E bit in INTEN_REG.
2D S3C2450X RISC MICROPROCESSOR
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4 RENDERING PIPELINE
The rendering pipeline of 2D is illustrated in Figure 19-3. The functionality and related registers of each stage are
introduced in detail in the rest of this chapter.
Figure 19-3. 2D Rendering Pipeline
4.1 PRIMITIVE DRAWING
Primitive Drawing determines the pixels to fill, and pass their coordinates to the next stage for further operations.
2D supports three types of primitive drawing: 1) line/point drawing; 2) bit block transfer; 3) color expansion.
4.1.1 Line/Point Drawing
Line Drawing renders a line between the starting point (sx, sy) and the ending point (ex, ey) specified by the user.
If the distance of these two points along y axis is greater than that along x axis ( |ey - sy| > |ex - sx| ), the Major
Axis should be set to y-axis; otherwise, x-axis. If y-axis is the Major Axis, the y-coordinate of a pixel on the line is
increased or decreased by 1 from its preceding pixel, while the x-coordinate increased or decreased by X-INCR
(smaller than 1). In the same vein, if x-axis is the Major Axis, the x-coordinate is increased or decreased by 1
while the y-coordinate by Y-INCR. Note that X-INCR and Y-INCR should be given in 2’s complement format as
shown below.
Figure 19-4. Data Format
S3C2450X RISC MICROPROCESSOR 2D
19-5
4.1.2 Related Registers
COORD_0 Coordinate of the starting point
COORD_2 Coordinate of the ending point (ignored if a point is rendered).
X-INCR X increment value ( ignored if x-axis is the Major Axis or a point is rendered).
X-INCR = (ex-sx)/ |ey - sy|
Y-INCR Y increment value (ignored if y-axis is the Major Axis or a point is rendered).
Y-INCR = (ey – sy)/ |ex - sx|
FG_COLOR The color of the drawn line/point
CMD0_REG Configure the line/point drawing parameters, such as whether the Major-Axis is x-
axis or y-axis, whether to draw a line or a point, and so on. Note that writing to this
register starts the rendering process.
4.1.3 Bit Block Transfer
A Bit Block Transfer is a transformation of a rectangular block of pixels. Typical applications include copying the
off-screen pixel data to frame buffer, combining to bitmap patterns by Raster Operation, changing the dimension
of a rectangular image and so on.
4.1.4 On-Screen Rendering
On-screen bit block transfer copies a rectangular block of pixels on screen to another position on the same
screen. Note that on-screen rendering has the following restriction:
1) SRC_BASE_ADDR = DEST_BASE_ADDR
2) SRC_HORI_RES_REG = DEST_HORI_RES_REG
3) SRC_COLOR_MODE = DEST_COLOR_MODE
4) If the destination block overlaps with the source block, stretch mode and rotation must not be used.
4.1.5 Off-Screen Rendering
Off-screen bit block transfer copies pixel data from off-screen memory to frame buffer. Color space conversion is
performed automatically if SRC_COLOR_MODE differs from DEST_COLOR_MODE. YUV 4:2:2 input is also
supported.
2D S3C2450X RISC MICROPROCESSOR
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4.1.6 Transparent Mode
2D can render image in Transparent Mode. In this mode, the pixels having the same color with background color
(BG_COLOR) are discarded, resulting in a transparent effect. The function of Transparent Mode is illustrated in
the images below, in which the BG_COLOR is set to white.
Figure 19-5. Transparent Mode
2D supports both host-to-screen mode and memory-to-screen mode of BLT.
4.1.7 Known Issue
In the stretch mode (when source image is scaled), the source coordinates are always rounded to the nearest.
This rounding may cause some problem in the boundary when users try to scale the image by integer times. For
example, if user wants to scale the image by four times, and set the X_INCR as 0.25, the source coordinates in
sequence are 0, 0.25, 0.50, 0.75, 1.0 and so on. However, when the current source coordinate is 0.75, it is
rounded to the nearest integer, which is 1, so the first pixel only repeats three times instead of four times. Such
problem may not be an issue when both the source and destination are big pictures or when the scale is not an
integer, but when it comes to small icons or when user wants every pixel to repeat exactly integer times, an
obvious error will occur.
S3C2450X RISC MICROPROCESSOR 2D
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4.1.8 Related Registers
COORD_0 Coordinate of the leftmost topmost coordinate of the source image
COORD_1 Coordinate of the rightmost bottommost coordinate of the source image
COORD_2 Coordinate of the leftmost topmost coordinate of the destination image
COORD_3 Coordinate of the rightmost bottommost coordinate of the destination image
X-INCR
X increment value of the source image coordinates. If it is greater than 1, the
image is shrunk horizontally; smaller than 1, stretched. This value is ignored
when S bit in CMDR_1 is disabled or host-to-screen mode is used.
X-INCR = (COORD1_X − COORD0_X) / (COORD3_X − COORD2_X)
Y-INCR
Y increment value of the source image coordinates. If it is greater than 1, the
image is shrunk vertically; smaller than 1, stretched. This value is ignored when S
bit in CMDR_1 is disabled or host-to-screen mode is used.
Y_INCR = (COORD1_Y − COORD0_Y) / ( COORD3_Y − COORD2_Y)
SRC_BASE_ADDR The base address of the source image (when memory-to-screen mode is used).
DEST_BASE_ADDR The base address of the destination image (usually the frame buffer base
address)
SRC_HORI_RES_REG The horizontal resolution of the source image
SRC_VERT_RES_REG The vertical resolution of the source image (used in YUV mode)
SC_HORI_RES_REG The screen resolution
SRC_COLOR_MODE The color mode of the source image
DEST_COLOR_MODE The color mode of the destination image
BG_COLOR Background color, used in the Transparent Mode and Blue Screen Mode.
BS_COLOR Blue screen color, used in the Blue Screen Mode.
ROP_REG Enable/disable Transparent Mode or Blue Screen Mode.
CMD1_REG Writing to this register starts the rendering process of memory-to-screen Bit Block
Transfer. If S bit is set, the image will be shrunk or stretched, depending on the
values of X-INCR and Y-INCR.
CMD2_REG / CMD3_REG
The host provides the source image data through these two command registers.
When the host writes the first 32-bit data into CMD2_REG, the rendering process
starts in the host-to-screen mode. Then the host should provide the rest of data
by writing into CMD3_REG continuously. Note that the data written to
CMD2_REG/CMD3_REG each time represents only one pixel, regardless of the
source color format. If the source color format is 16-bpp (e.g., RGB565), the
upper 16 bits of the data are ignored.
2D S3C2450X RISC MICROPROCESSOR
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4.1.9 Color Expansion (Font Drawing)
Color Expansion expands the monochrome color to either background (BG_COLOR) or foreground (FG_COLOR)
color. Each bit of the source data presents a pixel, with ‘1’ indicating the foreground color and ‘0’ the background
color. The bit sequence is from MSB to LSB. The MSB of the first data corresponds to the leftmost topmost pixel
of the destination image. Figure 19-6 serves as a good illustration of the function and data type of Color
Expansion. In this example, the foreground color is blue and background white, and the destination image is 16-
pixel wide.
Figure 19-6. Color Expansion
2D can render Color Expansion image in Transparent Mode. In this mode, the pixels with background color (the
corresponding bits are ‘0’s) are discarded, resulting in a transparent effect. The transparent effect on Color
Expansion is illustrated in Figure 19-7, in which the lower three lines are drawn with Transparent Mode enabled
while the upper three disabled. Note that the background color is set to white and the foreground black.
Figure 19-7. Font Drawing with Transparent Mode
2D supports both host-to-screen mode and memory-to-screen mode of Color Expansion.
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4.1.10 Related Registers
COORD_0 Coordinate of the leftmost topmost coordinate of the destination window
COORD_1 Coordinate of the rightmost bottommost coordinate of the destination window
FG_COLOR Foreground Color
BG_COLOR Background Color
ROP_REG Enable/disable Transparent Mode
CMD7_REG The base address of the font data. Note that writing to this register starts the
rendering process in the memory-to-screen mode.
CMD4_REG/CMD5_REG
The host provides the font data through these two command registers. When the
host writes the first 32-bit data into CMD4_REG, the rendering process starts in
the host-to-screen mode. Then the host should provide the rest of data by writing
them into CMD5_REG continuously.
4.2 ROTATION
The pixels can be rotated around the reference point (ox, oy) by 90/180/270 degree clockwise or perform a X-
axis/Y-axis flip around the horizontal or vertical line on which (ox, oy) lies. The effects of all rotation options are
summarized in the following table and illustrated in Figure 19-8.
4.2.1 Related Registers
ROT_OC_REG Coordinate of the rotation reference point
ROTATE_REG Rotation mode configuration
2D S3C2450X RISC MICROPROCESSOR
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4.2.2 Rotation Effect
0° 90° 180° 270° X-flip Y-flip
x dcx -dcy + (ox+oy) -dcx + 2ox dcy + (ox-oy) dcx -dcx + 2ox
y dcy dcx - (ox-oy) -dcy + 2oy -dcx + (ox+oy) -dcy + 2oy dcy
Original image
X- axis flip
90 °
270 °Y - axis flip
180 °
FIMG - 2D
Figure 19-8. Rotation Example
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19-11
4.3 CLIPPING
Clipping discards the pixels (after rotation) outside the clipping window. The discarded pixels will not go through
the rest of rendering pipelines.
Note that the clipping windows must reside totally inside the screen. Setting the clipping window the same size
with the screen will disable the clipping effect, and a clipping window bigger than the screen size is not allowed.
4.3.1 Related Registers
CW_LT_REG Coordinate of the leftmost topmost point of the clipping window
CW_RB_REG Coordinate of the rightmost bottommost point of the clipping window
4.4 STENCIL TEST
The Stencil Test conditionally discards a pixel based on the outcome of a comparison between the color value of
this pixel of the source image and the DR(min)/DR(max) values. If each field (R, G, B, A) of the color value falls in
the range of [ DR(min), DR(max)], this pixel is passed to the next stage; otherwise, discarded. User can disable
the stencil test on a specific field by clearing the corresponding bits in COLORKEY_CNTL. Note that each field of
DR_MIN and DR_MAX is 8-bit wide, regardless of the source color mode setting.
4.4.1 Related Registers
COLORKEY_CNTL Stencil Test configurations, such as enable/disable the test and so on.
COLORKEY_DR_MIN Set the DR(min) value for each field
COLORKEY_DR_MAX Set the DR(max) value for each field
4.5 RASTER OPERATION
Raster Operation performs Boolean operations on three operands: source, destination and third operand
according to the 8-bit ROP value specified by the user. The truth table of ROP is given in the following table.
Source Destination Third Operand ROP Value
0 0 0 Bit0
0 0 1 Bit1
0 1 0 Bit2
0 1 1 Bit3
1 0 0 Bit4
1 0 1 Bit5
1 1 0 Bit6
1 1 1 Bit7
2D S3C2450X RISC MICROPROCESSOR
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The third operand can be pattern or foreground color, configurable by the OS bit in the ROP_REG.
Pattern is a user-specified 8x8x16-bpp image; the pattern data should be given in RGB565 format. The following
equation is used to calculate the pattern index of pixel (x, y):
index = ( ((patternOffsetY + y) & 0x7 )<<3 ) + ((patternOffsetX + x)&0x7),
where patternOffsetY and patternOffsetX are the offset value specified in register PATOFF_REG.
Here are some examples on how to use the ROP value to perform the operations:
1. Final Data = Source. Only the Source data matter, so ROP Value = “11110000”.
2. Final Data = Destination. Only the Destination data matter, so ROP Value = “11001100”.
3. Final Data = Pattern. Only the Pattern data matter, so ROP Value = “10101010”.
4. Final Data = Source AND Destination. ROP Value = “11110000” & “11001100” = “11000000”
5. Final Data = Source OR Pattern. ROP Value = “11110000” | “10101010” = “11111010”.
Note that the Raster Operation only applies on R, G, B fields of the color data; the A field will not be affected.
4.5.1 Related Registers
PATTERN_REG[0:31] Pattern data
PATOFF_REG Pattern offset X, Y
ROP_REG ROP configurations and ROP Value
S3C2450X RISC MICROPROCESSOR 2D
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4.6 ALPHA BLENDING
Alpha Blending combines the source color and the destination color in the frame buffer to get the new destination
color.
The conventional alpha blending equation is: final data = src * alpha + dest * (1.0 − alpha). 2D uses 8-bit integer to
represent the alpha value, with 0 indicating 1/256 and 255 indicating 1.0. The equation of converting 8-bit ALPHA
value to the actual fractional alpha value is: alpha = (ALPHA+1) / 256.
The internal computation of alpha blending and fading is as follows:
User-specified alpha value: ALPHA (given by ALPHA_REG, from 0 to 255)
[Alpha Blending]
data = ( source * (ALPHA+1) + destination * (255-ALPHA) ) >> 8
[Fading]
data = (( source * (ALPHA+1) ) >> 8) + fading offset
Per-pixel alpha blending: ALPHA (given by the source image, from 0 to 255)
[Alpha Blending]
data = ( source * (ALPHA+1) + destination * (255-ALPHA) ) >> 8
[Fading]
data = ((source * (ALPHA+1) ) >> 8 ) + fading offset
4.6.1 Related Registers
ROP_REG Alpha blending configurations: alpha blending disable/enable, per-pixel alpha
blending disable/enable, fading disable/enable.
ALPHA_REG Alpha value and fading value.
2D S3C2450X RISC MICROPROCESSOR
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5 REGISTER DESCRIPTIONS
Register Offset R/W Description Reset Value
General Registers
CONTROL_REG 0x0000 W Control register. 0x0000_0000
INTEN_REG 0x0004 R/W Interrupt Enable register. 0x0000_0000
FIFO_INTC_REG 0x0008 R/W Interrupt Control register. 0x0000_0018
INTC_PEND_REG 0x000C R/W Interrupt Control Pending register. 0x0000_0000
FIFO_STAT_REG 0x0010 R Command FIFO Status register. 0x0000_0600
Command Registers
CMD0_REG 0x0100 W Command register for Line/Point drawing. −
CMD1_REG 0x0104 W Command register for BitBLT. −
CMD2_REG 0x0108 W Command register for Host to Screen Bitblt
transfer start.
−
CMD3_REG 0x010C W Command register for Host to Screen Bitblt
transfer continue.
−
CMD4_REG 0x0110 W Command register for Color Expansion.
(Host to Screen, Font Start)
−
CMD5_REG 0x0114 W Command register for Color Expansion.
(Host to Screen, Font Continue)
−
CMD6_REG 0x0118 W Reserved −
CMD7_REG 0x011C W Command register for Color Expansion.
(Memory to Screen)
−
Parameter Setting Registers
Resolution
SRC_ RES_REG 0x0200 R/W Source Image Resolution 0x0000_0000
SRC_HORI_RES_REG 0x0204 R/W Source Image Horizontal Resolution 0x0000_0000
SRC_VERT_RES_REG 0x0208 R/W Source Image Vertical Resolution 0x0000_0000
SC_RES_REG 0x0210 R/W Screen Resolution 0x0000_0000
SC_HORI_RES _REG 0x0214 R/W Screen Horizontal Resolution 0x0000_0000
SC_VERT_RES _REG 0x0218 R/W Screen Vertical Resolution 0x0000_0000
Clipping Window
CW_LT_REG 0x0220 R/W LeftTop coordinates of Clip Window. 0x0000_0000
CW_LT_X_REG 0x0224 R/W Left X coordinate of Clip Window. 0x0000_0000
CW_LT_Y_REG 0x0228 R/W Top Y coordinate of Clip Window. 0x0000_0000
CW_RB_REG 0x0230 R/W RightBottom coordinate of Clip Window. 0x0000_0000
CW_RB_X_REG 0x0234 R/W Right X coordinate of Clip Window. 0x0000_0000
CW_RB_Y_REG 0x0238 R/W Bottom Y coordinate of Clip Window. 0x0000_0000
Coordinates
COORD0_REG 0x0300 R/W Coordinates 0 register. 0x0000_0000
COORD0_X_REG 0x0304 R/W X coordinate of Coordinates 0. 0x0000_0000
COORD0_Y_REG 0x0308 R/W Y coordinate of Coordinates 0. 0x0000_0000
COORD1_REG 0x0310 R/W Coordinates 1 register. 0x0000_0000
COORD1_X_REG 0x0314 R/W X coordinate of Coordinates 1. 0x0000_0000
S3C2450X RISC MICROPROCESSOR 2D
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Register Offset R/W Description Reset Value
COORD1_Y_REG 0x0318 R/W Y coordinate of Coordinates 1. 0x0000_0000
COORD2_REG 0x0320 R/W Coordinates 2 register. 0x0000_0000
COORD2_X_REG 0x0324 R/W X coordinate of Coordinates 2. 0x0000_0000
COORD2_Y_REG 0x0328 R/W Y coordinate of Coordinates 2. 0x0000_0000
COORD3_REG 0x0330 R/W Coordinates 3 register. 0x0000_0000
COORD3_X_REG 0x0334 R/W X coordinate of Coordinates 3. 0x0000_0000
COORD3_Y_REG 0x0338 R/W Y coordinate of Coordinates 3. 0x0000_0000
Rotation
ROT_OC_REG 0x0340 R/W Rotation Origin Coordinates. 0x0000_0000
ROT_OC_X_REG 0x0344 R/W X coordinate of Rotation Origin Coordinates. 0x0000_0000
ROT_OC_Y_REG 0x0348 R/W Y coorindate of Rotation Origin Coordinates. 0x0000_0000
ROTATE_REG 0x034C R/W Rotation Mode register. 0x0000_0001
X,Y Increment Setting
X_INCR_REG 0x0400 R/W X Increment register. 0x0000_0000
Y_INCR_REG 0x0404 R/W Y Increment register. 0x0000_0000
ROP & Alpha Setting
ROP_REG 0x0410 R/W Raster Operation register. 0x0000_0000
ALPHA_REG 0x0420 R/W Alpha value, Fading offset. 0x0000_0000
Color
FG_COLOR_REG 0x0500 R/W Foreground Color / Alpha register. 0x0000_0000
BG_COLOR_REG 0x0504 R/W Background Color register 0x0000_0000
BS_COLOR_REG 0x0508 R/W Blue Screen Color register 0x0000_0000
SRC_COLOR_MODE_REG 0x0510 R/W Src Image Color Mode register. 0x0000_0000
DEST_COLOR_MODE_REG 0x0514 R/W Dest Image Color Mode register 0x0000_0000
Pattern
PATTERN_REG[0:31] 0x0600
~0x067C
R/W Pattern memory. 0x0000_0000
PATOFF_REG 0x0700 R/W Pattern Offset XY register. 0x0000_0000
PATOFF_X_REG 0x0704 R/W Pattern Offset X register. 0x0000_0000
PATOFF_Y_REG 0x0708 R/W Pattern Offset Y register. 0x0000_0000
Stencil Test
STENCIL_CNTL_REG 0x0720 R/W Stencil control register 0x0000_0000
STENCIL_DR_MIN_REG 0x0724 W Stencil decision reference MIN register 0x0000_0000
STENCIL_DR_MAX_REG 0x0728 W Stencil decision reference MAX register 0xFFFF_FFFF
Image Base Address
SRC_BASE_ADDR_REG 0x0730 R/W Source Image Base Address register 0x0000_0000
DEST_BASE_ADDR_REG 0x0734 R/W Dest Image Base Address register (in most
cases, frame buffer address) 0x0000_0000
2D S3C2450X RISC MICROPROCESSOR
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5.1 GENERAL REGISTERS
5.1.1 Control Register (CONTROL_REG)
Register Address R/W Description Reset Value
CONTROL_REG 0x4D408000 W Control register 0x0
Field Bit Description Initial State
Reserved [31:1]
− 0x0
R [0] Software Reset
Write to this bit results in a one-cycle reset signal to FIMG2D
graphics engine. Every command register and parameter setting
register will be assigned the “Reset Value”, and the command
FIFO will be cleared.
0x0
5.1.2 Interrupt Enable Register (INTEN_REG)
Register Address R/W Description Reset Value
INTEN_REG 0x4D408004 R/W Interrupt Enable register 0x0
Field Bit Description Initial State
Reserved [31:11] − 0x0
CCF [10] Current Command Finished interrupt enable.
If this bit is set, when the graphics engine finishes the execution of
current command, an interrupt occurs, and the INTP_CMD_FIN
flag in INTC_PEND_REG will be set.
ACF [9] All Commands Finished interrupt enable.
If this bit is set, when the graphics engine finishes the execution of
all commands in the command FIFO, an interrupt occurs, and the
INTP_ALL_FIN flag in INTC_PEND_REG will be set.
0x0
FIFO_FULL [8] Command FIFO Full interrupt enable.
If this bit is set, when command FIFO is full (32 entries), an
interrupt occurs, and the INTP_FULL flag in the interrupt pending
register (INTC_PEND_REG) will be set.
0x0
Reserved [7:1]
− 0x0
FIFO_INT_E [0] If this bit is set, when the number of entries occupied in command
FIFO is greater or equal to FIFO_INT_LEVEL (in
FIFO_INTC_REG), an interrupt occurs, and the
INTP_FIFO_LEVEL flag in the interrupt pending register
(INTC_PEND_REG) will be set.
0x0
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5.1.3 FIFO Interrupt Control Register (FIFO_INTC_REG)
Register Address R/W Description Reset Value
FIFO_INTC_REG 0x4D408008 R/W FIFO Interrupt Control 0x18
Field Bit Description Initial State
Reserved [31:6] − 0x0
FIFO_INT_LEVEL [5:0] If FIFO_INT_E (in INTEN_REG) is set, when FIFO_USED (in
FIFO_STAT_REG) is greater or equal to FIFO_INT_LEVEL, an
interrupt occurs.
0x18
5.1.4 Interrupt Pending Register (INTC_PEND_REG)
Register Address R/W Description Reset Value
INTC_PEND_REG 0x4D40800C R/W Interrupt Pending Register 0x0
Field Bit Description Initial State
Reserved [31] Should be set ‘1’ −
Reserved [30:11] Reserved −
INTP_CMD_FIN [10] Current Command Finished interrupt flag.
Writing ‘1’ to this bit clears this flag.
−
INTP_ALL_FIN [9] All Commands Finished interrupt flag.
Writing ‘1’ to this bit clears this flag.
−
INTP_FULL [8] Command FIFO Full interrupt flag.
Writing ‘1’ to this bit clears this flag.
−
Reserved [7:1]
− −
INTP_FIFO_LEVEL [0] FIFO_USED reaches FIFO_INT_LEVEL interrupt flag.
Writing ‘1’ to this bit clears this flag.
−
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5.1.5 FIFO Statue Register (FIFO_STAT_REG)
Register Address R/W Description Reset Value
FIFO_STAT_REG 0x4D408010 R FIFO Status Register 0x600
Field Bit Description Initial State
Reserved [31:11]
− −
CMD_FIN [10] 1 = The graphics engine finishes the execution of current
command.
0 = In the middle of rendering process.
0x1
ALL_FIN [9] 1 = Graphics engine is in idle state. The graphics engine finishes
the execution of all commands in the command FIFO. Note that
ALL_FIN = CMD_FIN && (FIFO_USED==0).
0 = In the middle of rendering process, or FIFO_USED is greater
than 0.
0x1
FIFO_OVERFLOW [8] 1 = Command FIFO is full, no more commands can be handled
0 = Command FIFO is not full.
0x0
Reserved [7]
− −
FIFO_USED [6:1] The number of entries occupied in command FIFO. 0x0
FIFO_LEVEL_INT [0] 1 = FIFO_USED is greater or equal to FIFO_INT_LEVEL
0 = FIFO_USED is smaller than FIFO_INT_LEVEL
0x0
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5.2 COMMAND REGISTERS
5.2.1 LINE Drawing Register (CMD0_REG)
Register Address R/W Description Reset Value
CMD0_REG 0x4D408100 W Line Drawing Register 0x0
Field Bit Description Initial State
Reserved [31:10]
− −
D [9] 0 = Draw Last Point
1 = Do-not-Draw Last Point.
−
M [8] 0 = Major axis is Y.
1 = Major axis is X.
−
Reserved [7:2]
− −
L [1] 0 = Nothing.
1 = Line Drawing.
−
P [0] 0 = Nothing.
1 = Point Drawing.
−
5.2.2 BitBLT Register (CMD1_REG)
Register Address R/W Description Reset Value
CMD1_REG 0x4D408104 W BitBLT Register 0x0
Field Bit Description Initial State
Reserved [31:2]
− −
S [1] 0 = Nothing
1 = Stretch BitBLT
−
N [0] 0 = Nothing
1 = Normal BitBLT
−
5.2.3 HOST Screen Start BitBLT Register (CMD2_REG)
Register Address R/W Description Reset Value
CMD2_REG 0x4D408108 W Host to Screen Start BitBLT Register 0x0
Field Bit Description Initial State
Data [31:0] BitBLT data (Start)
Note that the data written to this register represents only one pixel,
regardless of the source color mode. If the source color mode is
16-bpp (e.g., RGB565), the upper 16 bits of the data are ignored.
−
2D S3C2450X RISC MICROPROCESSOR
19-20
5.2.4 Host to Screen Continue BitBLT Register (CMD3_REG)
Register Address R/W Description Reset Value
CMD3_REG 0x4D40810C W Host to Screen Continue BitBLT Register 0x0
Field Bit Description Initial State
Data [31:0] BitBLT data (Continue)
Note that the data written to this register represents only one pixel,
regardless of the source color mode. If the source color mode is
16-bpp (e.g., RGB565), the upper 16 bits of the data are ignored.
−
5.2.5 Host to Screen Start Color Expansion Register (CMD4_REG)
Register Address R/W Description Reset Value
CMD4_REG 0x4D408110 W Host to Screen Start Color Expansion Register 0x0
Field Bit Description Initial State
Data [31:0] Color Expansion Data (Start) −
5.2.6 Host to Screen Continue Color Expansion Register (CMD5_REG)
Register Address R/W Description Reset Value
CMD5_REG 0x4D408114 W Host to Screen Continue Color Expansion Register 0x0
Field Bit Description Initial State
Data [31:0] Color Expansion Data (Continue) −
5.2.7 Memory to Screen Color Expansion Register (CMD7_REG)
Register Address R/W Description Reset Value
CMD7_REG 0x4D40811C W Memory to Screen Color Expansion Register 0x0
Field Bit Description Initial State
Memory
Address [31:0] Bitmap data base address (used in memory-to-screen mode,
should be word-aligned).
−
S3C2450X RISC MICROPROCESSOR 2D
19-21
5.3 PARAMETER SETTING REGISTERS
Resolution
5.3.1 Source Image Resolution Register (SRC_RES_REG)
Register Address R/W Description Reset Value
SRC_RES_REG 0x4D408200 R/W Source Image Resolution Register 0x0
Field Bit Description Initial State
Reserved [31:27] 0x0
VertRes [26:16] Vertical resolution of source image.
Range: 1 ~ 2040
0x0
Reserved [15:11] 0x0
HoriRes [10:0] Horizontal resolution of source image.
Range: 1 ~ 2040.
Note that in YUV mode, HoriRes must be an even number.
0x0
5.3.2 Source Image Horizontal Resolution Register (SRC_HORI_RES_REG)
Register Address R/W Description Reset Value
SRC_HORI_RES_REG 0x4D408204 R/W Source Image Horizontal Resolution
Register 0x0
Field Bit Description Initial State
Reserved [31:1]
− 0x0
HoriRes [10:0] Horizontal resolution of source image.
Range: 1 ~ 2040.
Note that in YUV mode, HoriRes must be an even number.
0x0
5.3.3 Source Image Horizontal Resolution Register (SRC_HORI_RES_REG)
Register Address R/W Description Reset Value
SRC_HORI_RES_
REG 0x4D408204 R/W Source Image Horizontal Resolution Register 0x0
Field Bit Description Initial State
Reserved [31:1]
− 0x0
VertRes [10:0] Vertical resolution of source image.
Range: 1 ~ 2040
0x0
2D S3C2450X RISC MICROPROCESSOR
19-22
5.3.4 Screen Resolution Register (SC_RES_REG)
Register Address R/W Description Reset Value
SC_RES_REG 0x4D408210 R/W Screen Resolution Register 0x0
Field Bit Description Initial State
Reserved [31:27]
− 0x0
VertRes [26:16] Vertical resolution of the screen.
Range: 1 ~ 2040
0x0
Reserved [15:11]
− 0x0
HoriRes [10:0] Horizontal resolution of the screen.
Range: 1 ~ 2040
0x0
5.3.5 Screen Horizontal Resolution Register (SC_HORI_RES_REG)
Register Address R/W Description Reset Value
SC_HORI_RES_
REG 0x4D408214 R/W Screen Horizontal Resolution Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
HoriRes [10:0] Horizontal resolution of the screen.
Range: 1 ~ 2040
0x0
5.3.6 Screen Vertical Resolution Register (SC_VERI_RES_REG)
Register Address R/W Description Reset Value
SC_VERI_RES_
REG 0x4D408218 R/W Screen Vertical Resolution Register 0x0
Field Bit Description Initial State
Reserved [31:1]
− 0x0
VeriRes [10:0] Vertical resolution of the screen.
Range: 1 ~ 2040
0x0
S3C2450X RISC MICROPROCESSOR 2D
19-23
Clipping Window
5.3.7 LeftTop Clipping Window Register (CW_LT_REG)
Register Address R/W Description Reset Value
CW_LT_REG 0x4D408220 R/W LeftTop Clipping Window Register 0x0
Field Bit Description Initial State
Reserved [31:27]
− 0x0
TopCW_Y [26:16] Top Y Clipping Window
Requirement: TopCW_Y < BottomCW_Y
0x0
Reserved [15:11]
− 0x0
LeftCW_X [10:0] Left X Coordinate of Clipping Window.
Requirement: LeftCW_X < RightCW_X
0x0
5.3.8 Left X Clipping Window Register (CW_LT_X_REG)
Register Address R/W Description Reset Value
CW_LT_X_REG 0x4D408224 R/W Left X Clipping Window Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
LeftCW_X [10:0] Left X Clipping Window
Requirement: LeftCW_X < RightCW_X
0x0
5.3.9 Top Y Clipping Window Register (CW_LT_Y_REG)
Register Address R/W Description Reset Value
CW_LT_Y_REG 0x4D408228 R/W Top Y Clipping Window Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
TopCW_Y [10:0] Top Y Clipping Window
Requirement: TopCW_Y < BottomCW_Y
0x0
2D S3C2450X RISC MICROPROCESSOR
19-24
5.3.10 RightBottom Clipping Window Register (CW_RB_REG)
Register Address R/W Description Reset Value
CW_RB_REG 0x4D408230 R/W RightBottom Clipping Window Register 0x0
Field Bit Description Initial State
Reserved [31:27]
− 0x0
BottomCW_Y [26:16] Bottom Y Clipping Window
Requirement: BottomCW_Y < VeriRes (SC_VERI_RES_REG)
0x0
Reserved [15:11]
− 0x0
RightCW_X [10:0] Right X Clipping Window
Requirement: RightCW_X < HoriRes (SC_HORI_RES_REG)
0x0
5.3.11 Right X Clipping Window Register (CW_RB_X_REG)
Register Address R/W Description Reset Value
CW_RB_X_REG 0x4D408234 R/W Right X Clipping Window Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
RightCW_X [10:0] Right X Clipping Window
Requirement: RightCW_X < HoriRes (SC_HORI_RES_REG)
0x0
5.3.12 Bottom Y Clipping Window Register (CW_RB_Y_REG)
Register Address R/W Description Reset Value
CW_RB_Y_REG 0x4D408238 R/W Bottom Y Clipping Window Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
BottomCW_Y [10:0] Bottom Y Clipping Window
Requirement: BottomCW_Y < VeriRes (SC_VERI_RES_REG)
0x0
S3C2450X RISC MICROPROCESSOR 2D
19-25
Coordinates
5.3.13 COORDINATE_0 Register (COORD0_REG)
Register Address R/W Description Reset Value
COORD0_REG 0x4D408300 R/W Coordinate_0 Register 0x0
Field Bit Description Initial State
Reserved [31:27]
− 0x0
Y [26:16] Coordinate_0 Y
Range: 0 ~ 2039
0x0
Reserved [15:11]
− 0x0
X [10:0] Coordinate_0 X
Range: 0 ~ 2039
0x0
5.3.14 COORDINATE_0 X Register (COORD0_X_REG)
Register Address R/W Description Reset Value
COORD0_X_REG 0x4D408304 R/W Coordinate_0 X Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
COORD0_X [10:0] Coordinate_0 X
Range: 0 ~ 2039
0x0
5.3.15 COORDINATE_0 Y Register (COORD0_Y_REG)
Register Address R/W Description Reset Value
COORD0_Y_REG 0x4D408308 R/W Coordinate_0 Y Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
COORD0_Y [10:0] Coordinate_0 Y
Range: 0 ~ 2039
0x0
2D S3C2450X RISC MICROPROCESSOR
19-26
5.3.16 COORDINATE_1 Register (COORD1_REG)
Register Address R/W Description Reset Value
COORD1_REG 0x4D408310 R/W Coordinate_1 Register 0x0
Field Bit Description Initial State
Reserved [31:27]
− 0x0
Y [26:16] Coordinate_1 Y
Range: 0 ~ 2039
0x0
Reserved [15:11]
− 0x0
X [10:0] Coordinate_1 X
Range: 0 ~ 2039
0x0
5.3.17 COORDINATE_1 X Register (COORD1_X_REG)
Register Address R/W Description Reset Value
COORD1_X_REG 0x4D408314 R/W Coordinate_1 X Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
COORD1_X [10:0] Coordinate_1 X
Range: 0 ~ 2039
0x0
5.3.18 COORDINATE_1 Y Register (COORD1_Y_REG)
Register Address R/W Description Reset Value
COORD1_Y_REG 0x4D408318 R/W Coordinate_1 Y Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
COORD1_Y [10:0] Coordinate_1 Y
Range: 0 ~ 2039
0x0
S3C2450X RISC MICROPROCESSOR 2D
19-27
5.3.19 COORDINATE_2 Register (COORD2 _REG)
Register Address R/W Description Reset Value
COORD2_REG 0x4D408320 R/W Coordinate_2 Register 0x0
Field Bit Description Initial State
Reserved [31:27]
− 0x0
Y [26:16] Coordinate_2 Y
Range: 0 ~ 2039
0x0
Reserved [15:11]
− 0x0
X [10:0] Coordinate_2 X
Range: 0 ~ 2039
0x0
5.3.20 COORDINATE_2 X Register (COORD2_X_REG)
Register Address R/W Description Reset Value
COORD2_ X_REG 0x4D408324 R/W Coordinate_2 X Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
COORD2_X [10:0] Coordinate_2 X
Range: 0 ~ 2039
0x0
5.3.21 COORDINATE_2 Y Register (COORD2_Y_REG)
Register Address R/W Description Reset Value
COORD2_ Y_REG 0x4D408328 R/W Coordinate_2 Y Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
COORD2_Y [10:0] Coordinate_2 Y
Range: 0 ~ 2039
0x0
2D S3C2450X RISC MICROPROCESSOR
19-28
5.3.22 COORDINATE_3 REGISTER (COORD3 _REG)
Register Address R/W Description Reset Value
COORD3_REG 0x4D408330 R/W Coordinate_3 Register 0x0
Field Bit Description Initial State
Reserved [31:27]
− 0x0
Y [26:16] Coordinate_3 Y
Range: 0 ~ 2039
0x0
Reserved [15:11]
− 0x0
X [10:0] Coordinate_3 X
Range: 0 ~ 2039
0x0
5.3.23 COORDINATE_3 X Register (COORD3_X_REG)
Register Address R/W Description Reset Value
COORD3_ X_REG 0x4D408334 R/W Coordinate_3 X Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
COORD3_X [10:0] Coordinate_3 X
Range: 0 ~ 2039
0x0
5.3.24 COORDINATE_3 Y Register (COORD3_Y_REG)
Register Address R/W Description Reset Value
COORD3_ Y_REG 0x4D408338 R/W Coordinate_3 Y Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
COORD3_Y [10:0] Coordinate_3 Y
Range: 0 ~ 2039
0x0
S3C2450X RISC MICROPROCESSOR 2D
19-29
Rotation
5.3.25 Rotation Origin Coordinate Register (ROT_OC_REG)
Register Address R/W Description Reset Value
ROT_OC_REG 0x4D408340 R/W Rotation Origin Coordinate Register 0x0
Field Bit Description Initial State
Reserved [31:27]
− 0x0
Y [26:16] X coordinate of the reference point of rotation
Range: 0 ~ 2039
0x0
Reserved [15:11]
− 0x0
X [10:0] Y coordinate of the reference point of rotation
Range 0 ~ 2039
0x0
5.3.26 Rotation Origin Coordinate X Register (ROT_OC_X_REG)
Register Address R/W Description Reset Value
ROT_OC_X 0x4D408344 R/W Rotation Origin Coordinate X Register 0x0
Field Bit Description Initial State
Reserved [31:11]
− 0x0
ROT_OC_X [10:0] X coordinate of the reference point of rotation
Range: 0 ~ 2039
0x0
5.3.27 Rotation Origin Coordinate Y Register (ROT_OC_Y_REG)
Register Address R/W Description Reset Value
ROT_OC_Y 0x4D408348 R/W Rotation Origin Coordinate Y Register 0x0
Field Bit Description Initial State
Reserved [31:1]
− 0x0
ROT_OC_Y [10:0] Y coordinate of the reference point of rotation
Range 0 ~ 2039
0x0
2D S3C2450X RISC MICROPROCESSOR
19-30
5.3.28 Rotation Register (ROTATE_REG)
Register Address R/W Description Reset Value
ROTATE_REG 0x4D40834C R/W Rotation Register 0x0
Field Bit Description Initial State
Reserved [31:6] 0x0
FY [5] Y-flip 0x0
FX [4] X-flip 0x0
R3 [3]
270° Rotation 0x0
R2 [2]
180° Rotation 0x0
R1 [1]
90° Rotation 0x0
R0 [0]
0° Rotation 0x1
* If the two or more of Rn are set to 1 at the same time, drawing engine operates unpredictably.
S3C2450X RISC MICROPROCESSOR 2D
19-31
X,Y Increment Setting
5.3.29 X Increment Register (X_INCR_REG)
Register Address R/W Description Reset Value
X_INCR_REG 0x4D408400 R/W X Increment Register 0x0
Field Bit Description Initial State
Reserved [31:22]
− 0x0
X_INCR [21:0] X increment value (2’s complement, 11-digit fraction) 0x0
5.3.30 Y Increment Register (Y_INCR_REG)
Register Address R/W Description Reset Value
Y_INCR_REG 0x4D408404 R/W Y Increment Register 0x0
Field Bit Description Initial State
Reserved [31:22]
− 0x0
Y_INCR [21:0] Y increment value (2’s complement, 11-digit fraction) 0x0
2D S3C2450X RISC MICROPROCESSOR
19-32
ROP & Alpha Setting
5.3.31 Raster Operation Register (ROP_REG)
Register Address R/W Description Reset Value
ROP_REG 0x4D408410 R/W Raster Operation Register 0x0
Field Bit Description Initial State
Reserved [31:14]
− 0x0
OS [13] Third Operand Select :
1’b0 = Pattern
1’b1 = Foreground Color
0x0
ABM [12:10] Alpha Mode :
3’b000 = No Alpha Blending
3’b001 = Perpixel Alpha Blending with Source Bitmap
3’b010 = Alpha Blending with Alpha Register
3’b100 = Fading
Others = Reserved
Note that Perpixel Alpha Blending can only be applied on bit block
transfer.
0x0
T [9] 0 = Opaque Mode
1 = Transparent Mode
0x0
Reserved [8] Reserved 0x0
ROP Value [7:0] Raster Operation Value 0x0
5.3.32 Alpha Register (ALPHA_REG)
Register Address R/W Description Reset Value
ALPHA_REG 0x4D408420 R/W Alpha Register 0x0
Field Bit Description Initial State
Reserved [31:16]
− 0x0
Fading [15:8] Fading Offset Value 0x0
Alpha [7:0] Alpha Value 0x0
S3C2450X RISC MICROPROCESSOR 2D
19-33
Color
5.3.33 Foreground Color Register (FG_COLOR_REG)
Register Address R/W Description Reset Value
FG_COLOR_REG 0x4D408500 R/W Foreground Color Register 0x0
Field Bit Description Initial State
ForegroundColor [31:0] Foreground Color Value.
The alpha field of the foreground color will be discarded.
0x0
5.3.34 Backround Color Register (BG_COLOR_REG)
Register Address R/W Description Reset Value
BG_COLOR_REG 0x4D408504 R/W Background Color Register 0x0
Field Bit Description Initial State
BackgroundColor [31:0] Background Color Value.
The alpha field of the background color will be discarded.
0x0
5.3.35 BlueScreen Color Register (BS_COLOR_REG)
Register Address R/W Description Reset Value
BS_COLOR_REG 0x4D408508 R/W BlueScreen Color Register 0x0
Field Bit Description Initial State
BlueScreenColor [31:0] BlueScreen Color Value.
The alpha field of the blue screen color will be discarded.
0x0
2D S3C2450X RISC MICROPROCESSOR
19-34
5.3.36 Source Image Color Mode Register (SRC_COLOR_MODE_REG)
Register Address R/W Description Reset Value
SRC_COLOR_
MODE_REG 0x4D408510 R/W Source Image Color Mode Register 0x0
Field Bit Description Initial State
Reserved [31:5]
− 0x0
Narrow [4] 1 = YUV narrow range (Y:16-235, UV: 16-240)
0 = YUV wide range (YUV: 0-255) 0x0
YUV [3] 1 = YUV mode
0 = RGB mode
This bit should be set to 0 in point/line drawing mode and color
expansion mode.
0x0
Color Setting [2:0] 3’b000 = RGB_565
3’b001 = RGBA_5551
3’b010 = ARGB_1555
3’b011 = RGBA_8888
3’b100 = ARGB_8888
3’b101 = XRGB_8888
3’b110 = RGBX_8888
The Color Setting is ignored if YUV mode is selected
0x0
5.3.37 Destination Image Color Mode Register (DEST_COLOR_MODE_REG)
Register Address R/W Description Reset Value
DEST_COLOR_
MODE_REG 0x4D408514 R/W Destination Image Color Mode Register 0x0
Field Bit Description Initial State
Reserved [31:4]
− 0x0
Color Setting [2:0] 3’b000 = RGB_565
3’b001 = RGBA_5551
3’b010 = ARGB_1555
3’b011 = RGBA_8888
3’b100 = ARGB_8888
3’b101 = XRGB_8888
3’b110 = RGBX_8888
0x0
S3C2450X RISC MICROPROCESSOR 2D
19-35
Pattern
5.3.38 Pattern Register (PAT_REG)
Register Address R/W Description Reset Value
PAT_REG 0x4D408600 ~ 67C R/W Pattern Register 0x0
Field Bit Description Initial State
PAT_REG [31:0] Pattern Register 0x0
5.3.39 Pattern Offset Register (PATOFF_REG)
Register Address R/W Description Reset Value
PATOFF_REG 0x4D408700 R/W Pattern Offset Register 0x0
Field Bit Description Initial State
Reserved [31:19]
− 0x0
POffsetY [18:16] Pattern OffsetY Value 0x0
Reserved [15:3]
− 0x0
POffsetX [2:0] Pattern OffsetX Value 0x0
5.3.40 Pattern Offset X Register (PATOFF_X_REG)
Register Address R/W Description Reset Value
PATOFF_X_REG 0x4D408704 R/W Pattern Offset X Register 0x0
Field Bit Description Initial State
Reserved [31:3]
− 0x0
POffsetX [2:0] Pattern OffsetX Value 0x0
5.3.41 Pattern Offset Y Register (PATOFF_Y_REG)
Register Address R/W Description Reset Value
PATOFF_Y_REG 0x4D408708 R/W Pattern Offset Y Register 0x0
Field Bit Description Initial State
Reserved [31:3]
− 0x0
POffsetY [2:0] Pattern OffsetY Value 0x0
2D S3C2450X RISC MICROPROCESSOR
19-36
Stencil Test
5.3.42 Colorkey Control Register (COLORKEY_CTRL_REG)
Register Address R/W Description Reset Value
COLORKEY_CTRL
_REG 0x4D408720 R/W Colorkey Control Register 0x0
Field Bit Description Initial State
Reserved [31:5]
− 0x0
StencilInverse [4] 0 = Normal stencil test
1 = Inversed stencil test
This bit should be set to 0 if the stencil test of every color field is
disabled.
0x0
StencilOnR [3] 0 = Stencil Test Off for R value
1 = Stencil Test On for R value 0x0
StencilOnG [2] 0 = Stencil Test Off for G value
1 = Stencil Test On for G value 0x0
StencilOnB [1] 0 = Stencil Test Off for B value
1 = Stencil Test On for B value 0x0
StencilOnA [0] 0 = Stencil Test Off for A value
1 = Stencil Test On for A value 0x0
5.3.43 Colorkey Decision Reference Minimum Register (COLORKEY_DR_MIN_REG)
Register Address R/W Description Reset Value
COLORKEY_DR_
MIN_REG 0x4D408724 R/W Colorkey Decision Reference Minimum Register 0x0
Field Bit Description Initial State
A_DR(min) [31:24] Alpha DR MIN value 0x0
R_DR(min) [23:16] RED DR MIN value 0x0
G_DR(min) [15:8] GREEN DR MIN value 0x0
B_DR(min) [7:0] BLUE DR MIN value 0x0
S3C2450X RISC MICROPROCESSOR 2D
19-37
5.3.44 COLORKEY DECISION REFERENCE MAXIMUM REGISTER (COLORKEY_DR_MAX_REG)
Register Address R/W Description Reset Value
COLORKEY_DR_
MAX_REG 0x4D408728 R/W Colorkey Decision Reference Maximum Register 0xFFFF_FFFF
Field Bit Description Initial State
A_DR(max) [31:24] Alpha DR MAX value 0xF
R_DR(max) [23:16] RED DR MAX value 0xF
G_DR(max) [15:8] GREEN DR MAX value 0xF
B_DR(max) [7:0] BLUE DR MAX value 0xF
Image Base Address
5.3.45 Source Image Base Address Register (SRC_BASE_ADDR_REG)
Register Address R/W Description Reset Value
SRC_BASE_
ADDR_REG 0x4D408730 R/W Source Image Base Address Register 0x0
Field Bit Description Initial State
ADDR [31:0] Base address of the source image 0x0
5.3.46 Destination Image Base Address Register (DEST_BASE_ADDR_REG)
Register Address R/W Description Reset Value
DEST_BASE_
ADDR_REG 0x4D408734 R/W Destination Image Base Address Register 0x0
Field Bit Description Initial State
ADDR [31:0] Base address of the destination image (in most cases, it is also
the frame buffer base address). 0x0
2D S3C2450X RISC MICROPROCESSOR
19-38
NOTES
S3C2450X RISC MICROPROCESSOR HS_SPI CONTROLLER
20-1
20 HS_SPI CONTROLLER
1 OVERVIEW
The High Speed Serial Peripheral Interface (HS_SPI) can interface the serial data transfer. HS_SPI has two
8/16/32-bit shift registers for transmission and receiving, respectively. During an HS_SPI transfer, data is
simultaneously transmitted (shifted out serially) and received (shifted in serially). HS_SPI supports the protocols
for National Semiconductor Microwire and Motorola Serial Peripheral Interface.
2 FEATURES
The features of the HS_SPI are:
• Supports full duplex
• 8/16/32-bit shift register for TX/RX
• 8-bit prescale logic
• 3 clock source
• Supports 8bit/16bit/32bit bus interface
• Supports the Motorola HS_SPI protocol and National Semiconductor Microwire
• Two independent transmit and receive FIFOs, each 16 samples deep by 32-bits wide
• Master-mode and Slave-mode
• Receive-without-transmit operation
HS_SPI CONTROLLER S3C2450X RISC MICROPROCESSOR
20-2
3 SIGNAL DESCRIPTIONS
The following table lists the external signals between the HS_SPI and external device. All ports of the HS_SPI can
be used as General Purpose I/O ports when disable. See “General Purpose I/O” chapter for detailed pin
configuration.
Table 20-1. External Signals Description
Channel Name Direction Description
PSPICLK0 Inout PSPICLK0 is the serial clock used to control time to transfer data.
PSPIMISO0 Inout In Master mode, this port is to be input port to get data from slave
output port. Data are transmitted to master through this port when in
slave mode.
PSPIMOSI0 Inout In Master mode, this port is to be output port to transfer data from
master output port. Data are received from master through this port
when in slave mode.
Channel 0
PSS0 Inout
As to be slave selection signal, all data TX/RX sequences are
executed when PSS0 is low.
PSPICLK1 Inout PSPICLK1 is the serial clock used to control time to transfer data.
PSPIMISO1 Inout In Master mode, this port is to be input port to get data from slave
output port. Data are transmitted to master through this port when in
slave mode.
PSPIMOSI1 Inout In Master mode, this port is to be output port to transfer data from
master output port. Data are received from master through this port
when in slave mode.
Channel 1
PSS1 Inout
As to be slave selection signal, all data TX/RX sequences are
executed when PSS1 is low.
4 OPERATION
The HS_SPI in S3C2450 transfers 1-bit serial data between S3C2450 and external device. The HS_SPI in
S3C2450 supports that CPU or DMA can access to transmit or receive FIFOs separately and to transfer data in
both direction simultaneously. HS_SPI has 2 channel, TX channel and RX channel. TX channel has a path only
from Tx FIFO to external device. RX channel has a path only from external device to RX FIFO.
CPU(or DMA) should write data on the register HS_SPI_TX_DATA to write data in FIFO. Data on the register are
automatically moved to Tx FIFOs. To read data from Rx FIFOs, CPU(or DMA) should access the register
HS_SPI_RX_DATA and then data are automatically sent to the register HS_SPI_RX_DATA.
S3C2450X RISC MICROPROCESSOR HS_SPI CONTROLLER
20-3
4.1 OPERATION MODE
HS_SPI has 2 modes, master and slave mode. In master mode, SPICLK is generated and transmitted to external
device. PSS, which is signal to select slave, indicates data valid when it is low level. PSS should be set low before
packets starts to be transmitted or received.
4.2 FIFO ACCESS
The HS_SPI in S3C2450 supports CPU access and DMA access to FIFOs. Data size of CPU access and DMA
access to FIFOs can be selected 8-bit/16-bit/32-bit data. If 8-bit data size is chosen, valid bits are from 0 bit to 7
bit. CPU accesses are normally on and off by trigger threshold user defines. The trigger level of each FIFOs is set
from 0byte to 64bytes. TxDMAOn or RxDMAOn bit of HS_SPI_MODE_CFG register should be set to use DMA
access. DMA access supports only single transfer and 4-burst transfer. In TX FIFO, DMA request signal is high
until that FIFO is full. In RX FIFO, dma request signal is high if FIFO is not empty.
4.3 TRAILING BYTES IN THE RX FIFO
When the number of samples in Rx FIFO is less than the threshold value in INT mode or DMA 4 burst mode and
no additional data is received, the remaining bytes are called trailing bytes. To remove these bytes in RX FIFO,
internal timer and interrupt signal are used. The value of internal timer can be set up to 1024 clocks based on
APB BUS clock. When timer value is to be zero, interrupt signal is occurred and CPU can remove trailing bytes in
FIFO.
4.4 PACKET NUMBER CONTROL
HS_SPI can control the number of packets to be received in master mode. If there is any number of packets to be
received, just set the SFR(Packet_Count_reg) how many packets have to be received. HS_SPI stops generating
HS_SPICLK when the number of packets is the same as what you set. But, software reset or hardware reset
should be followed before that this function is reload.
4.5 NCS CONTROL
nCS can be selected auto control or manual control. In manual control, Auto_n_Manual should be set default
value 0. nCS level is decided as the same as that nSSout bit is set. nCS can be toggled between packet and
packet in auto control. Auto_n_Manual is set to 1 and nCS_time_count should be set as long as nCS is inactive.
nSSout is not available at this time.
HS_SPI CONTROLLER S3C2450X RISC MICROPROCESSOR
20-4
4.6 HS_SPI TRANSFER FORMAT
The S3C2450 supports 4 different format to transfer the data. Figure 20-1 shows four waveforms for HS_SPICLK.
Cycle
MOSI
1 2 3 4 5 6 7 8
MSB 6 5 4 3 2 1 LSB
6 5 4 3 2 1 LSB
SPICLK
MISO MSB
CPOL = 1, CPHA = 1 (Format B)
Cycle
MOSI
1 2 3 4 5 6 7 8
MSB 6 5 4 3 2 1 LSB
6 5 4 3 2 1 LSB *MSB
SPICLK
MISO MSB
CPOL = 1, CPHA = 0 (Format A)
Cycle
MOSI
1 2 3 4 5 6 7 8
6 5 4 3 2 1 LSB
6 5 4 3 2 1LSB
SPICLK
MISO LSB*
CPOL = 0, CPHA = 1 (Format B)
Cycle
MOSI
1 2 3 4 5 6 7 8
MSB 6 5 4 3 2 1 LSB
6 5 4 3 2 1 LSB *MSB
SPICLK
MISO MSB
CPOL = 0, CPHA = 0 (Format A)
LSB*
MSB
MSB
*MSB : MSB of previous frame
LSB* : LSB of next frame
LSB* : LSB of next frame
*MSB : MSB of previous frame
Figure 20-1. HS_SPI Transfer Format
S3C2450X RISC MICROPROCESSOR HS_SPI CONTROLLER
20-5
5 SPECIAL FUNCTION REGISTER DESCRIPTIONS
5.1 SETTING SEQUENCE OF SPECIAL FUNCTION REGISTER
Special Function Register should be set as the following sequence. (nCS manual mode)
1. Set Transfer Type. (CPOL & CPHA set)
2. Set Clock configuration register.
3. Set HS_SPI MODE configuration register.
4. Set HS_SPI INT_EN register.
5. Set Packet Count configuration register if necessary.
6. Set Tx or Rx Channel on.
7. Set nSSout low to start Tx or Rx operation.
A. Set nSSout Bit to low, then start TX data writing.
B. If auto chip selection bit is set, should not control nCS.
HS_SPI CONTROLLER S3C2450X RISC MICROPROCESSOR
20-6
5.2 SPECIAL FUNCTION REGISTER
Register Address R/W Description Reset Value
CH_CFG(Ch0) 0x52000000 R/W HS_SPI configuration register 0x0000_0040
CH_CFG(Ch1) 0x59000000 R/W HS_SPI configuration register 0x0000_0040
CH_CFG Bit Description Initial State
Reserved [31:7]
− 26’b0
High_speed_en [6] 0 = Low speed operation support at slave mode.
1 = High speed operation support at slave mode.
1’b1
SW_RST [5] Software reset
0 = Inactive
1 = Active
1’b0
SLAVE [4] Whether HS_SPI Channel is Master or Slave.
0 = Master
1 = Slave
1’b0
CPOL [3] Determine an active high or active low clock
0 = Active high
1 = Active low
1’b0
CPHA [2] Select one of the two fundamentally different transfer format
0 = Format A
1 = Format B
1’b0
RxChOn [1] HS_SPI Rx Channel On
0 = Channel Off
1 = Channel On
1’b0
TxChOn [0] HS_SPI Tx Channel On
0 = Channel Off
1 = Channel On
1’b0
S3C2450X RISC MICROPROCESSOR HS_SPI CONTROLLER
20-7
Register Address R/W Description Reset Value
Clk_CFG(Ch0) 0x52000004 R/W Clock configuration register 0x0
Clk_CFG(Ch1) 0x59000004 R/W Clock configuration register 0x0
Clk_CFG Bit Description Initial State
ClkSel [10:9] Clock source selection to generate HS_SPI clock-out
00 = PCLK
01 = USBCLK
10 = Epll clock
11 = Reserved
* For using USBCLK source, The USB_SIG_MASK at system controller
should be set to on.
* Epll clock is from System Controller and has 4 sources:
MOUTEPLL, DOUTMPLL, PLL_SRCLK, CLK27M
2’b0
ENCLK [8] Clock on/off
0 = Disable
1 = Enable
1’b0
Prescaler Value [7:0] HS_SPI clock-out division rate
HS_SPI clock-out = Clock source / ( 2 x (Prescaler value +1))
8’h0
HS_SPI CONTROLLER S3C2450X RISC MICROPROCESSOR
20-8
Register Address R/W Description Reset Value
MODE_CFG(Ch0) 0x52000008 R/W HS_SPI FIFO control register 0x0
MODE_CFG(Ch1) 0x59000008 R/W HS_SPI FIFO control register 0x0
MODE_CFG Bit Description Initial State
Ch_tran_size [30:29] 00 = Byte
01 = Halfword
10 = Word
11 = Reserved
2’b0
Trailing Count [28:19] Count value from writing the last data in RX FIFO to flush
trailing bytes in FIFO 10’b0
BUS transfer size [18:17]
00 = Byte
01 = Halfword
10 = Word
11 = Reserved
2’b0
RxTrigger [16:11] Rx FIFO trigger level in INT mode.
Trigger level is from 0 to 63. The value means byte number in
RX FIFO
6’b0
TxTrigger [10:5] Tx FIFO trigger level in INT mode
Trigger level is from 0 to 63. The value means byte number in
TX FIFO
6’b0
reserved [4:3]
− −
RxDMA On [2] DMA mode on/off
0 = DMA mode off
1 = DMA mode on
1’b0
TxDMA On [1] DMA mode on/off
0 = DMA mode off
1 = DMA mode on
1’b0
DMA transfer [0] DMA transfer type, single or 4 bust.
0 = Single
1 = 4 burst
DMA transfer size should be set as the same size in DMA as it
in HS_SPI.
1’b0
** Channel Transfer size must be smaller than Bus Transfer size or the same as.
S3C2450X RISC MICROPROCESSOR HS_SPI CONTROLLER
20-9
Register Address R/W Description Reset Value
Slave_slection_reg(Ch0) 0x5200000C R/W Slave selection signal 0x1
Slave_slection_reg(Ch1) 0x5900000C R/W Slave selection signal 0x1
Slave_slection_reg Bit Description Initial State
nCS_time_count [9:4]
nSSout inactive time =
((nCS_time_count+3)/2) x HS_SPICLKout) 6’b0
reserved [3:2] Reserved −
Auto_n_Manual [1]
Chip select toggle manual or auto selection
0 = Manual
1 = Auto
1’b0
nSSout [0]
Slave selection signal( manual only)
0 = Active
1 = Inactive
1’b1
Register Address R/W Description Reset Value
HS_SPI_INT_EN(Ch0) 0x52000010 R/W HS_SPI Interrupt Enable register 0x0
HS_SPI_INT_EN(Ch1) 0x59000010 R/W HS_SPI Interrupt Enable register 0x0
HS_SPI_INT_EN Bit Description Initial State
IntEnTrailing [6]
Interrupt Enable for trailing count to be zero
0 = Disable 1 = Enable 1’b0
IntEnRxOverrun [5]
Interrupt Enable for RxOverrun
0 = Disable 1 = Enable 1’b0
IntEnRxUnderrun [4]
Interrupt Enable for RxUnderrun
0 = Disable 1 = Enable 1’b0
IntEnTxOverrun [3]
Interrupt Enable for TxOverrun
0 = Disable 1 = Enable 1’b0
IntEnTxUnderrun [2]
Interrupt Enable for TxUnderrun. In slave mode, this bit
should be clear first after turning on slave TX path.
0 = Disable 1 = Enable
1’b0
IntEnRxFifoRdy [1]
Interrupt Enable for RxFifoRdy(INT mode)
0 = Disable 1 = Enable 1’b0
IntEnTxFifoRdy [0]
Interrupt Enable for TxFifoRdy(INT mode)
0 = Disable 1 = Enable 1’b0
HS_SPI CONTROLLER S3C2450X RISC MICROPROCESSOR
20-10
Register Address R/W Description Reset Value
HS_SPI_STATUS(Ch0
) 0x52000014 R HS_SPI status register 0x0
HS_SPI_STATUS(Ch1
) 0x59000014 R HS_SPI status register 0x0
HS_SPI_STATUS Bit Description Initial State
TX_done [21]
Indication of transfer done in Shift register
0 = all case except blow case
1 = when tx fifo and shift register are empty
* Master mode only
1’b0
Trailing_count_done [20]
Indication that trailing count is zero 1’b0
RxFifoLvl [19:13]
Data level in RX FIFO
0 ~ 7’h40 byte 7’b0
TxFifoLvl [12:6]
Data level in TX FIFO
0 ~ 7’h40 byte 7’b0
RxOverrun [5]
Rx Fifo overrun error
0 = No error
1 = Overrun error
1’b0
RxUnderrun [4]
Rx Fifo underrun error
0 = No error
1 = Underrun error
1’b0
TxOverrun [3]
Tx Fifo overrun error
0 = No error
1 = Overrun error
1’b0
TxUnderrun [2]
Tx Fifo underrun error
0 = No error
1 = Underrun error
* If TX fifo empty, always occur at slave mode
1’b0
RxFifoRdy [1]
0 = Data in FIFO less than trigger level
1 = Data in FIFO more than trigger level 1’b0
TxFifoRdy [0]
0 = Data in FIFO more than trigger level
1 = Data in FIFO less than trigger level 1’b0
S3C2450X RISC MICROPROCESSOR HS_SPI CONTROLLER
20-11
Register Address R/W Description Reset Value
HS_SPI_TX_DATA(Ch0) 0x52000018 W HS_SPI TX DATA register 0x0
HS_SPI_TX_DATA(Ch1) 0x59000018 W HS_SPI TX DATA register 0x0
HS_SPI_TX_DATA Bit Description Initial State
TX_DATA [31:0]
This field contains the data to be transmitted over the
HS_SPI channel. 32’b0
Register Address R/W Description Reset Value
HS_SPI_RX_DATA(Ch0) 0x5200001C R HS_SPI RX DATA register 0x0
HS_SPI_RX_DATA(Ch1) 0x5900001C R HS_SPI RX DATA register 0x0
HS_SPI_RX_DATA Bit Description Initial State
RX_DATA [31:0]
This field contains the data to be received over the
HS_SPI channel. 32’b0
Register Address R/W Description Reset Value
Packet_Count_reg(Ch0) 0x52000020 R/W Count how many data master gets 0x0
Packet_Count_reg(Ch1) 0x59000020 R/W Count how many data master gets 0x0
Packet_Count_reg Bit Description Initial State
Packet_Count_En [16]
Enable bit for packet count
0 = Disable
1 = Enable
1’b0
Count Value [15:0] Packet count value 16’b0
HS_SPI CONTROLLER S3C2450X RISC MICROPROCESSOR
20-12
Register Address R/W Description Reset Value
Pending_clr_reg(Ch0) 0x52000024 R/W Pending clear register 0x0
Pending_clr_reg(Ch1) 0x59000024 R/W Pending clear register 0x0
Status_Pending_
clear_reg Bit Description Initial State
TX_underrun_clr [4]
TX underrun pending clear bit
0 = Non-clear
1 = Clear
1’b0
TX_overrun_clr [3]
TX overrun pending clear bit
0 = Non-clear
1 = Clear
1’b0
RX_underrun_clr [2]
RX underrun pending clear bit
0 = Non-clear
1 = Clear
1’b0
RX_overrun_clr [1]
RX overrun pending clear bit
0 = Non-clear
1 = Clear
1’b0
Trailing_clr [0]
Trailing pending clear bit
0 = Non-clear
1 = Clear
1’b0
S3C2450X RISC MICROPROCESSOR HS_SPI CONTROLLER
20-13
Register Address R/W Description Reset Value
SWAP_CFG(Ch0) 0x52000028 R/W SWAP config register 0x0
SWAP_CFG (Ch1) 0x59000028 R/W SWAP config register 0x0
SWAP_CFG Bit Description Initial State
RX_Half-word swap [7] 0 = off 1 = swap 1’b0
RX_Byte swap [6] 0 = off 1 = swap 1’b0
RX_Bit swap [5] 0 = off 1 = swap 1’b0
RX_SWAP_en [4]
Swap enable
0 = normal 1 = swap 1’b0
TX_Half-word swap [3] 0 = off 1 = swap 1’b0
TX_Byte swap [2] 0 = off 1 = swap 1’b0
TX_Bit swap [1] 0 = off 1 = swap 1’b0
TX_SWAP_en [0]
Swap enable
0 = normal 1 = swap 1’b0
** Data size must be larger than swap size.
Register Address R/W Description Reset Value
FB_Clk_sel (Ch0) 0x5200002C R/W Feedback clock selecting register. 0x3
FB_Clk_sel (Ch1) 0x5900002C R/W Feedback clock selecting register. 0x3
FB_Clk_sel Bit Description Initial State
FB_Clk_sel [1:0]
00 = 0ns additional delay
01 = 3ns additional delay
10 = 6ns additional delay
11 = 9ns additional delay
* delay base on typical condition.
2’b11
HS_SPI CONTROLLER S3C2450X RISC MICROPROCESSOR
20-14
NOTES
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-1
21 SD/MMC HOST CONTROLLER
This chapter describes the SD/SDIO/MMC/CE-ATA host controller and related registers supported by S3C2450X
RISC microprocessor.
1 OVERVIEW
The HSMMC (High-speed MMC) SDMMC is a combo host for Secure Digital card and MultiMedia Card. This host
is compatible for SD Association’s (SDA) Host Standard Specification.
You can interface your system with SD card and MMC card. This performance of this host is very powerful, you
would get 50MHz clock rate and access 8-bit data pin simultaneously.
We provide 2 Channel HSMMC support.
CH0 only 4 bit data interface support.
2 FEATURES
• SD Standard Host Spec(ver 2.0) compatible
• SD Memory Card Spec(ver 2.0) / High Speed MMC Spec(4.2) compatible
• SDIO Card Spec(Ver 1.0) compatible
• 512 bytes FIFO for data Tx/Rx
• 48-bit Command Register
• 136-bit Response Register
• CPU Interface and DMA data transfer mode
• 1bit / 4bit / 8bit(Channel 1 only) mode switch support.
• Auto CMD12 support
• Suspend / Resume support
• Read Wait operation support
• Card Interrupt support
• CE-ATA mode support
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-2
3 BLOCK DIAGRAM
SFR
R
System Bus
(AHB)
CMD
ARG
G
Control
Status
AHB slave I/F
DMA
controller
AHB master
FIFO
DATA
packet
Status
Control
CMDRSP
packet
Status
Control
RSP
Line
Control Pad
I/F
INTREQ
BaseCLK
Clock Control
DPSRAM
Control
Figure 21-1. HSMMC Block Diagram
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-3
4 SEQUENCE
This section defines basic sequence flow chart divided into several sub sequences. “Wait for interrupts” is used in
the flow chart. This means the Host Driver waits until specified interrupts are asserted. If already asserted, then
fall through that step in the flow chart. Timeout checking shall be always required to detect no interrupt generated
but this is not described in the flow chart.
4.1 SD CARD DETECTION SEQUENCE
Figure 21-2. SD Card Detect Sequence
The flow chart for detecting a SD card is shown in Figure 21-2. Each step is executed as follows:
(1) To enable interrupt for card detection, write 1 to the following bits:
Card Insertion Status Enable(ENSTACARDNS) in the Normal Interrupt Status Enable register
Card Insertion Signal Enable(ENSIGCARDNS) in the Normal Interrupt Signal Enable register
Card Removal Status Enable(ENSTACARDREM) in the Normal Interrupt Status Enable register
Card Removal Signal Enable(ENSIGCARDREM) in the Normal Interrupt Signal Enable register
(2) When the Host Driver detects the card insertion or removal, clear its interrupt statuses. If Card Insertion
interrupt(STACARDINS) is generated, write 1 to Card Insertion in the Normal Interrupt Status register. If Card
Removal interrupt(STACARDREM) is generated, write 1 to Card Removal in the Normal Interrupt Status register.
(3) Check Card Inserted in the Present State register. In the case where Card Inserted(INSCARD) is 1, the Host
Driver can supply the power and the clock to the SD card. In the case where Card Inserted is 0, the other
executing processes of the Host Driver shall be immediately closed.
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-4
4.2 SD CLOCK SUPPLY SEQUENCE
START
Calculate a divisor for SD Clock frequency
Set SDCLK frequency select and
Internal Clock Enable
Check Internal Clock
Enable
Set SD Clock ON
End
(1)
(2)
(3)
(4)
Figure 21-3. SD Clock Supply Sequence
The sequence for supplying SD Clock to a SD card is described in Figure 21-3. The clock shall be supplied to the
card before either of the following actions is taken.
a) Issuing a SD command
b) Detect an interrupt from a SD card in 4-bit mode.
(1) Calculate a divisor to determine SD Clock frequency by reading Base Clock Frequency for SD Clock in the
Capabilities register. If Base Clock Frequency for SD Clock is 00 0000b, the Host System shall provide this
information to the Host Driver by another method.
(2) Set Internal Clock Enable(ENINTCLK) and SDCLK Frequency Select in the Clock Control register in
accordance with the calculated result of step (1).
(3) Check Internal Clock Stable(STBLINTCLK) in the Clock Control register. Repeat this step until Clock Stable is
1.
(4) Set SD Clock Enable(ENSDCLK) in the Clock Control register to 1. Then, the Host Controller starts to supply
the SD Clock.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-5
4.3 SD CLOCK STOP SEQUENCE
START
Set SD Clock OFF
END
(1)
Stop SD Clock
Figure 21-4. SD Clock Stop Sequence
The flow chart for stopping the SD Clock is shown in Figure 21-4. The Host Driver shall not stop the SD Clock
when a SD transaction is occurring on the SD Bus -- namely, when either Command Inhibit (DAT) or Command
Inhibit (CMD) in the Present State register is set to 1.
(1) Set SD Clock Enable(ENSDCLK) in the Clock Control register to 0. Then, the Host Controller stops supplying
the SD Clock.
4.4 SD CLOCK FREQUENCY CHANGE SEQUENCE
START
SD Clock Stop
SD Clock Supply
END
(1)
(2)
Figure 21-5. SD Clock Change Sequence
The sequence for changing SD Clock frequency is shown in Figure 21-5. When SD Clock is still off, step (1) is
omitted.
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-6
4.5 SD BUS POWER CONTROL SEQUENCE
START
Get the support voltage of the
Host Controller
Set SD Bus voltage select with
supported maximum voltage
Set SD Bus Power
Get OCR value of the SD Card
SD Bus voltage
changed ?
Clr SD Bus Power
Set SD Bus voltage select
Set SD Bus Power
END
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
change
no change
Figure 21-6. SD Bus Power Control Sequence
The sequence for controlling the SD Bus Power is described in Figure 21-6.
(1) By reading the Capabilities register, get the support voltage of the Host Controller.
(2) Set SD Bus Voltage Select in the Power Control register with maximum voltage that the Host Controller
supports.
(3) Set SD Bus Power(PWRON) in the Power Control register to 1.
(4) Get the OCR value of all function internal of SD card.
(5) Judge whether SD Bus voltage needs to be changed or not. In case where SD Bus voltage needs to be
changed, go to step (6). In case where SD Bus voltage does not need to be changed, go to ‘End’.
(6) Set SD Bus Power in the Power Control register to 0 for clearing this bit. The card requires voltage rising from
0 volt to detect it correctly. The Host Driver shall clear SD Bus Power before changing voltage by setting SD
Bus Voltage Select.
(7) Set SD Bus Voltage Select(SELPWRLVL) in the Power Control register.
(8) Set SD Bus Power(PWRON) in the Power Control register to 1.
NOTE: Step (2) and step (3) can be executed at same time. And also, step (7) and step (8) can be executed at same time.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-7
4.6 CHANGE BUS WIDTH SEQUENCE
Disable Card Interrupt in Host
(1)
START
SD Memory Only
Card ?
(2)
Mask Card Interrupt in Card
(3)
Change Bit Mode in Card
(4)
Change Bit Mode for Host
(5)
SD Memory Only
Card ?
(6)
Enable Card Interrupt in Card
(7)
Enable Card Interrupt in Host
(8)
yes
no
yes
no
END
Figure 21-7. Change Bus Width Sequence
The sequence for changing bit mode on SD Bus is shown in Figure 21-7.
(1) Set Card Interrupt Status Enable(STACARDINT) in the Normal Interrupt Status Enable register to 0 for
masking incorrect interrupts that may occur while changing the bus width.
(2) In case of SD memory only card, go to step (4). In case of other card, go to step (3).
(3) Set “IENM” of the CCCR in a SDIO or SD combo card to 0 by CMD52.
(4) Change the bit mode for a SD card. Changing SD memory card bus width by ACMD6(Set bus width) and
changing SDIO card bus width by setting Bus Width of Bus Interface Control register in CCCR.
(5) In case of changing to 4-bit mode, set Data Transfer Width(WIDE4) in the Host Control register to 1. In
another case (1-bit mode), set this bit to 0.
(6) In case of SD memory only card, go to the ‘End’. In case of other card, go to step (7).
(7) Set “IENM” of the CCCR in a SDIO or SD combo card to 1 by CMD52.
(8) Set Card Interrupt Status Enable in the Normal Interrupt Status Enable register to 1.
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-8
4.7 TIMEOUT SETTING FOR DAT LINE
Calculate a Divisor for detecting Timeout
(1)
START
Set Timeout Detection Timer
(2)
END
Figure 21-8. Timeout Setting Sequence
In order to detect timeout errors on DAT line, the Host Driver shall execute the following two steps before any SD
transaction.
(1) Calculate a divisor to detect timeout errors by reading Timeout Clock Frequency and Timeout Clock Unit in
the Capabilities register. If Timeout Clock Frequency is 00 0000b, the Host System shall provide this
information to the Host Driver by another method.
(2) Set Data Timeout Counter Value(TIMEOUTCON) in the Timeout Control register in accordance with the value
from step (1) above.
4.8 SD TRANSACTION GENERATION
This section describes the sequences how to generate and control various kinds of SD transactions. SD
transactions are classified into three cases:
(1) Transactions that do not use the DAT line.
(2) Transactions that use the DAT line only for the busy signal.
(3) Transactions that use the DAT line for transferring data.
In this specification the first and the second case’s transactions are classified as “Transaction Control without
Data Transfer using DAT Line,” the third case’s transaction is classified as “Transaction Control with Data
Transfer using DAT Line.”
Please refer to the specifications below for the detailed specifications on the SD Command itself:
• SD Memory Card Specification Part 1
PHYSICAL LAYER SPECIFICATION Version 1.01
• SD Card Specification PART E1
Secure Digital Input/Output (SDIO) Specification Version 1.00
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-9
4.9 SD COMMAND ISSUE SEQUENCE
Figure 21-9. Timeout Setting Sequence
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-10
(1) Check Command Inhibit (CMD) in the Present State register. Repeat this step until Command Inhibit (CMD) is
0. That is, when Command Inhibit (CMD) is 1, the Host Driver shall not issue a SD Command.
(2) If the Host Driver issues a SD Command with busy signal, go to step (3). If without busy signal, go to step (5).
(3) If the Host Driver issues an abort command, go to step (5). In the case of no abort command, go to step (4).
(4) Check Command Inhibit (DAT) in the Present State register. Repeat this step until Command Inhibit (DAT) is
0.
(5) Set the value corresponding to the issued command in the Argument register.
(6) Set the value corresponding to the issued command in the Command register.
NOTE: Writing the upper byte in the Command register causes a SD command to be issued.
(7) Perform Command Complete Sequence
4.10 COMMAND COMPLETE SEQUENCE
The sequence for completing the SD Command is shown in Figure 21-10. There is a possibility that the errors
(Command Index/End bit/CRC/Timeout Error) occur during this sequence.
(1) Wait for the Command Complete Interrupt. If the Command Complete Interrupt has occurred, go to step (2).
(2) Write 1 to Command Complete(STACMDCMPLT) in the Normal Interrupt Status register to clear this bit.
(3) Read the Response register and get necessary information in accordance with the issued command.
(4) Judge whether the command uses the Transfer Complete Interrupt or not. If it uses Transfer Complete, go to
step (5). If not, go to step (7).
(5) Wait for the Transfer Complete Interrupt. If the Transfer Complete Interrupt has occurred, go to step (6).
(6) Write 1 to Transfer Complete(STATRANCMPLT) in the Normal Interrupt Status register to clear this bit.
(7) Check for errors in Response Data. If there is no error, go to step (8). If there is an error, go to step (9).
(8) Return Status of “No Error”.
(9) Return Status of “Response Contents Error”.
NOTES:
1. While waiting for the Transfer Complete interrupt, the Host Driver shall only issue commands that do not use the busy
signal.
2. The Host Driver shall judge the Auto CMD12(Stop Command) complete by monitoring Transfer Complete.
3. When the last block of un-protected area is read using memory multiple blocks read command (CMD18),
OUT_OF_RANGE error may occur even if the sequence is correct. The Host Driver should ignore it. This error will appear
in the response of Auto CMD12 or in the response of the next memory command.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-11
START
Wait for Command
Complete Int
Command Complete Int occur
Clr Command Complete Status
Get Response Data
Command with Transfer
Complete Int ?
Wait for Transfer
Complete Int
Clr Transfer Complete Status
Transfer Complete Int occur
Check Response Data ?
no
No error
Return Status
(No Error) Return Status
(Response Contents Error)
Error
END
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8) (9)
Figure 21-10. Command Complete Sequence
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-12
4.11 TRANSACTION CONTROL WITH DATA TRANSFER USING DAT LINE
Depending on whether DMA (optional) is used or not, there are two execution methods. The sequence not using
DMA is shown in Figure 21-11 and the sequence using DMA is shown in Figure 21-12.
In addition, the sequences for SD transfers are basically classified into following three kinds according to how the
number of blocks is specified :
1) Single Block Transfer:
The number of blocks is specified to the Host Controller before the transfer. The number of blocks specified is
always one.
2) Multiple Block Transfer:
The number of blocks is specified to the Host Controller before the transfer. The number of blocks specified
shall be one or more.
3) Infinite Block Transfer:
The number of blocks is not specified to the Host Controller before the transfer. This transfer is continued until
an abort transaction is executed. This abort transaction is performed by CMD12(Stop Command) in the case
of a SD memory card, and by CMD52(IO_RW_DIRECT) in the case of a SDIO card.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-13
START
Set Block Size Reg
(1)
Set Block Count Reg
(2)
Set Argument Reg
(3)
Set Transfer Mode Reg
(4)
Set Command Reg
(5)
Wait for Command
Complete Int
Clr Command Complete
Status
Command Complete Int occur
Get Response Data
Write or Read ?
(6)
(7)
(8)
Wait for Buffer Write
Ready Int
Buffer Write Ready
Int occur
Clr Buffer Write Ready Status
Set Block Data
More Blocks ?
write read
(9)
(10-W)
(11-W)
(12-W)
(13-W) yes
no
Wait for Buffer Read
Ready Int
Buffer Read Ready
Int occur
Clr Buffer Read Ready Status
Get Block Data
(11-R)
(12-R)
(10-R)
More Blocks ?
yes (13-R)
no
Single / Multi /Infinite Block
Transfer ?
Single or Multi
block transfer Infinite block
transfer
Wait for Transfer Complete Int Abort Transaction
Clr Transfer Complete Status
END
(14)
(15)
(16)
(17)
Figure 21-11. Transaction Control with Data Transfer Using DAT Line Sequence (Not using DMA)
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-14
(1) Set the value corresponding to the executed data byte length of one block to Block Size register.
(2) Set the value corresponding to the executed data block count to Block Count Register.
(3) Set the value corresponding to the issued command to Argument register.
(4) Set the value to Multi / Single Block Select and Block Count Enable. And at this time, set the value
corresponding to the issued command to Data Transfer Direction, Auto CMD12 Enable and DMA Enable.
(5) Set the value corresponding to the issued command to Command register.
NOTE: When writing the upper byte of Command register, SD command is issued.
(6) And then, wait for the Command Complete Interrupt.
(7) Write 1 to the Command Complete(STACMDCMPLT) in the Normal Interrupt Status register for clearing
this bit.
(8) Read Response register and get necessary information in accordance with the issued command.
(9) In the case where this sequence is for write to a card, go to step (10-W). In case of read from a card, go
to step (10-R).
(10-W) And then wait for Buffer Write Ready Interrupt.
(11-W) Write 1 to the Buffer Write Ready(STABUFWTRDY) in the Normal Interrupt Status register for clearing
this bit.
(12-W) Write block data (in according to the number of bytes specified at the step (1)) to Buffer Data Port register.
(13-W) Repeat until all blocks are sent and then go to step (14).
(10-R) And then wait for the Buffer Read Ready Interrupt.
(11-R) Write 1 to the Buffer Read Ready(STABUFRDRDY) in the Normal Interrupt Status register for clearing
this bit.
(12-R) Read block data (in according to the number of bytes specified at the step (1)) from the Buffer Data Port
register.
(13-R) Repeat until all blocks are received and then go to step (14).
(14) If this sequence is for Single or Multiple Block Transfer, go to step (15). In case of Infinite Block
Transfer, go to step (17).
(15) Wait for Transfer Complete Interrupt.
(16) Write 1 to the Transfer Complete(STATRANCMPLT) in the Normal Interrupt Status register for clearing
this bit.
(17) Perform the sequence for Abort Transaction.
NOTE: Step (1) and Step (2) can be executed at same time. Step (4) and Step (5) can be executed at same time
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-15
START
Set Block Size Reg
(1)
Set Block Count Reg
(2)
Set Argument Reg
(3)
Set Transfer Mode Reg
(4)
Set Command Reg
(5)
Set System Address Reg
(6)
Wait for Command
Complete Int
Clr Command Complete
Status
Command Complete Int occur
Get Response Data
(7)
(8)
(9)
Wait for Transfer
Complete Int and DMA Int
Check Interrupt Status
DMA Int occur
Transfer Complete Int
occur
Clr DMA Status Interrupt
Set System Address Reg
(10)
(11)
(12)
(13)
Clr Transfer Complete status
Clr DMA Interrupt status
(14)
END
Figure 21-12. Transaction Control with Data Transfer Using DAT Line Sequence (Using DMA)
(1) Set the system address for DMA in the System Address register.
(2) Set the value corresponding to the executed data byte length of one block in the Block Size register.
(3) Set the value corresponding to the executed data block count in the Block Count register(BLKCNT).
(4) Set the value corresponding to the issued command in the Argument register(ARGUMENT).
(5) Set the values for Multi / Single Block Select and Block Count Enable.
And at this time, set the value corresponding to the issued command for Data Transfer Direction, Auto CMD12
Enable and DMA Enable.
(6) Set the value corresponding to the issued command in the Command register(CMDREG).
NOTE: When writing to the upper byte of the Command register, the SD command is issued and DMA is started.
(7) And then wait for the Command Complete Interrupt.
(8) Write 1 to the Command Complete(STACMDCMPLT) in the Normal Interrupt Status register to clear this bit.
(9) Read Response register and get necessary information in accordance with the issued command.
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
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(10) Wait for the Transfer Complete Interrupt and DMA Interrupt.
(11) If Transfer Complete(STATRANCMPLT) is set 1, go to Step (14) else if DMA Interrupt is set to 1, go to Step
(12). Transfer Complete is higher priority than DMA Interrupt.
(12) Write 1 to the DMA Interrupt in the Normal Interrupt Status register to clear this bit.
(13) Set the next system address of the next data position to the System Address register and go to Step (10).
(14) Write 1 to the Transfer Complete and DMA Interrupt in the Normal Interrupt Status register to clear this bit.
NOTE: Step (2) and Step (3) can be executed simultaneously. Step (5) and Step (6) can also be executed simultaneously.
4.12 ABORT TRANSACTION
An abort transaction is performed by issuing CMD12 for a SD memory card and by issuing CMD52 for a SDIO
card. There are two cases where the Host Driver needs to do an Abort Transaction. The first case is when the
Host Driver stops Infinite Block Transfers. The second case is when the Host Driver stops transfers while a
Multiple Block Transfer is executing.
There are two ways to issue an Abort Command. The first is an asynchronous abort. The second is a
synchronous abort. In an asynchronous abort sequence, the Host Driver can issue an Abort Command at anytime
unless Command Inhibit (CMD) in the Present State register is set to 1. In a synchronous abort, the Host Driver
shall issue an Abort Command after the data transfer stopped by using Stop At Block Gap Request in the Block
Gap Control register.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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5 SDI SPECIAL REGISTERS
5.1 CONFIGURATION REGISTER TYPES
Configuration register fields are assigned one of the attributes described below :
Register
Attribute Description
RO Read-only register: Register bits are read-only and cannot be altered by software or any
reset operation. Writes to these bits are ignored.
ROC Read-only status : These bits are initialized to zero at reset. Writes to these bits are
ignored.
RW or R/W Read-write register : Register bits are read-write and may be either set or cleared by
software to the desired state.
RW1C Read-only status, Write-1-to-clear status: Register bits indicate status when read, a set bit
indicating a status event may be cleared by writing a 1. Writing a 0 to RW1C bits has no
effect.
RWAC Read-Write, automatic clear register: The Host Driver requests a Host Controller operation
by setting the bit. The Host Controllers shall clear the bit automatically when the operation
of complete. Writing a 0 to RWAC bits has no effect.
HWInit Hardware Initialized: Register bits are initialized by firmware or hardware mechanisms
such as pin strapping or serial EEPROM. Bits are read-only after initialization, and writes to
these bits are ignored.
Rsvd or Reserved Reserved. These bits are initialized to zero, and writes to them are ignored.
Address
HSMMC0_BASE 0x4AC0_0000
HSMMC1_BASE 0x4A80_0000
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-18
5.2 SDMA SYSTEM ADDRESS REGISTER
Register Address R/W Description Reset Value
SYSAD0 0X4AC00000 R/W System Address register (Channel 0) 0x0
SYSAD1 0X4A800000 R/W System Address register (Channel 1) 0x0
This register contains the physical system memory address used for DMA transfers.
Name Bit Description Initial Value
SYSAD [31:0]
SDMA System Address
This register contains the system memory address for a DMA transfer.
When the Host Controller stops a DMA transfer, this register shall point to
the system address of the next contiguous data position. It can be accessed
only if no transaction is executing (i.e., after a transaction has stopped).
Read operations during transfers may return an invalid value.
The Host Driver shall initialize this register before starting a DMA
transaction. After DMA has stopped, the next system address of the next
contiguous data position can be read from this register.
The DMA transfer waits at the every boundary specified by the Host SDMA
Buffer Boundary in the Block Size register. The Host Controller generates
DMA Interrupt to request the Host Driver to update this register. The Host
Driver set the next system address of the next data position to this register.
When the most upper byte of this register (003h) is written, the Host
Controller restarts the DMA transfer. When restarting DMA by the Resume
command or by setting Continue Request in the
Block Gap Control register, the Host Controller shall start at the next
contiguous address stored here in the System Address register.
0x00
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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5.3 BLOCK SIZE REGISTER
This register is used to configure the number of bytes in a data block.
Register Address R/W Description Reset Value
BLKSIZE0 0X4AC00004 R/W Host DMA Buffer Boundary and Transfer Block Size
Register (Channel 0) 0x0
BLKSIZE1 0X4A800004 R/W Host DMA Buffer Boundary and Transfer Block Size
Register (Channel 1) 0x0
Name Bit Description Initial Value
[15] Reserved 0
BUFBOUND [14:12]
Host DMA Buffer Boundary
The large contiguous memory space may not be available in the virtual
memory system. To perform long DMA transfer, System Address
register shall be updated at every system memory boundary during
DMA transfer. These bits specify the size of contiguous buffer in the
system memory. The DMA transfer shall wait at the every boundary
specified by these fields and the Host Controller generates the DMA
Interrupt to request the Host Driver to update the System Address
register.
In case of this register is set to 0 (buffer size = 4K bytes), lower 12-bit
of byte address points data in the contiguous buffer and the upper 20-
bit points the location of the buffer in the system memory. The DMA
transfer stops when the Host Controller detects carry out of the
address from bit 11 to 12.
These bits shall be supported when the DMA Support in the
Capabilities register is set to 1 and this function is active when the
DMA Enable in the Transfer Mode register is set to 1.
000b = 4K bytes (Detects A11 carry out)
001b = 8K bytes (Detects A12 carry out)
010b = 16K Bytes (Detects A13 carry out)
011b = 32K Bytes (Detects A14 carry out)
100b = 64K bytes (Detects A15 carry out)
101b = 128K Bytes (Detects A16 carry out)
110b = 256K Bytes (Detects A17 carry out)
111b = 512K Bytes (Detects A18 carry out)
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
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Name Bit Description Initial Value
BLKSIZE [11:0]
Transfer Block Size
This register specifies the block size of data transfers for CMD17,
CMD18, CMD24, CMD25, and CMD53. Values ranging from 1 up to
the maximum buffer size can be set. In case of memory, it shall be set
up to 512 bytes. It can be accessed only if no transaction is executing
(i.e., after a transaction has stopped). Read operations during transfers
may return an invalid value, and write operations shall be ignored.
0200h = 512 Bytes
01FFh = 511 Bytes
…
0004h = 4 Bytes
0003h = 3 Bytes
0002h = 2 Bytes
0001h = 1 Byte
0000h = No data transfer
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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5.4 BLOCK COUNT REGISTER
This register is used to configure the number of data blocks.
Register Address R/W Description Reset Value
BLKCNT0 0X4AC00006 R/W Blocks Count For Current Transfer (Channel 0) 0x0
BLKCNT1 0X4A800006 R/W Blocks Count For Current Transfer (Channel 1) 0x0
Name Bit Description Initial Value
BLKCNT [15:0]
Blocks Count For Current Transfer
This register is enabled when Block Count Enable in the Transfer
Mode register is set to 1 and is valid only for multiple block transfers.
The Host Driver shall set this register to a value between 1 and the
maximum block count. The Host Controller decrements the block count
after each block transfer and stops when the count reaches zero.
Setting the block count to 0 results in no data blocks being transferred.
This register should be accessed only when no transaction is executing
(i.e., after transactions are stopped). During data transfer, read
operations on this register may return an invalid value and write
operations are ignored. When saving transfer context as a result of a
Suspend command, the number of blocks yet to be transferred can be
determined by reading this register. When restoring transfer context
prior to issuing a Resume command, the Host Driver shall restore the
previously saved block count.
FFFFh = 65535 blocks
… …
0002h = 2 blocks
0001h = 1 block
0000h = Stop Count
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
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5.5 ARGUMENT REGISTER
This register contains the SD Command Argument.
Register Address R/W Description Reset Value
ARGUMENT0 0X4AC00008 R/W Command Argument Register (Channel 0) 0x0
ARGUMENT1 0X4A800008 R/W Command Argument Register (Channel 1) 0x0
Name Bit Description Initial Value
ARGUMENT [31:0]
Command Argument
The SD Command Argument is specified as bit39-8 of Command-
Format in the SD Memory Card Physical Layer Specification.
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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5.6 TRANSFER MODE REGISTER
This register is used to control the operation of data transfers. The Host Driver shall set this register before issuing
a command which transfers data (see Data Present Select in the Command register), or before issuing a
Resume command. The Host Driver shall save the value of this register when the data transfer is suspended (as
a result of a Suspend command) and restore it before issuing a Resume command. To prevent data loss, the
Host Controller shall implement write protection for this register during data transactions. Writes to this register
shall be ignored when the Command Inhibit (DAT) in the Present State register is 1.
Register Address R/W Description Reset Value
TRNMOD0 0X4AC0000C R/W Transfer Mode Setting Register (Channel 0) 0x0
TRNMOD1 0X4A80000C R/W Transfer Mode Setting Register (Channel 1) 0x0
Name Bit Description Initial Value
[15:10]
Reserved 0
CCSCON [9:8]
Command Completion Signal Control
00 = No CCS Operation (Normal operation, Not CE-ATA mode)
01 = Read or Write data transfer CCS enable (Only CE-ATA mode)
10 = Without data transfer CCS enable (Only CE-ATA mode)
11 = Abort Completion Signal (ACS) generation (Only CE-ATA mode)
0
[7:6]
Reserved 0
MUL1SIN0 [5]
Multi / Single Block Select
This bit enables multiple block DAT line data transfers. For any other
commands, this bit shall be set to 0. If this bit is 0, it is not necessary to
set the Block Count register. (Refer to the Table below ″Determination
of Transfer Type″ )
1 = Multiple Block
0 = Single Block
0
RD1WT0 [4]
Data Transfer Direction Select
This bit defines the direction of DAT line data transfers. The bit is set to
1 by the Host Driver to transfer data from the SD card to the SD Host
Controller and it is set to 0 for all other commands.
1 = Read (Card to Host)
0 = Write (Host to Card)
0
[3]
Reserved 0
ENACMD12 [2]
Auto CMD12 Enable
Multiple block transfers for memory require CMD12 to stop the
transaction.
When this bit is set to 1, the Host Controller shall issue CMD12
automatically when last block transfer is completed. The Host Driver
shall not set this bit to issue commands that do not require CMD12 to
stop data transfer.
1 = Enable
0 = Disable
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-24
Name Bit Description Initial Value
ENBLKCNT [1]
Block Count Enable
This bit is used to enable the Block Count register, which is only relevant
for multiple block transfers. When this bit is 0, the Block Count register is
disabled, which is useful in executing an infinite transfer. (Refer to the
Table below ″Determination of Transfer Type″ )
1 = Enable
0 = Disable
0
ENDMA [0]
DMA Enable
This bit enables DMA functionality. DMA can be enabled only if it is
supported as indicated in the DMA Support in the Capabilities register.
If DMA is not supported, this bit is meaningless and shall always read 0.
If this bit is set to 1, a DMA operation shall begin when the Host Driver
writes to the upper byte of Command register (00Fh).
1 = Enable
0 = Disable
0
Table below shows the summary of how register settings determine types of data transfer.
Table 21-1. Determination of Transfer Type
Multi/Single Block Select Block Count Enable Block Count Function
0 Don′t care Don′t care Single Transfer
1 0
Don′t care Infinite Transfer
1 1 Not Zero Multiple Transfer
1 1 Zero Stop Multiple Transfer
NOTE: For CE-ATA access, (Auto) CMD12 should be issued after Command Completion Signal Disable
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-25
5.7 COMMAND REGISTER
This register contains the SD Command Argument.
Register Address R/W Description Reset Value
CMDREG0 0X4AC0000E R/W Command Register (Channel 0) 0x0
CMDREG1 0X4A80000E R/W Command Register (Channel 1) 0x0
The Host Driver shall check the Command Inhibit (DAT) bit and Command Inhibit (CMD) bit in the Present
State register before writing to this register. Writing to the upper byte of this register triggers SD command
generation. The Host Driver has the responsibility to write this register because the Host Controller does not
protect for writing when Command Inhibit (CMD) is set.
Name Bit Description Initial Value
[15:14]
Reserved
CMDIDX [13:8]
Command Index
These bits shall be set to the command number (CMD0-63, ACMD0-
63) that is specified in bits 45-40 of the Command-Format in the SD
Memory Card Physical Layer Specification and SDIO Card
Specification.
CMDTYP [7:6]
Command Type
There are three types of special commands: Suspend, Resume and
Abort.
These bits shall be set to 00b for all other commands.
• Suspend Command
If the Suspend command succeeds, the Host Controller shall assume
the SD Bus has been released and that it is possible to issue the next
command which uses the DAT line. The Host Controller shall de-assert
Read Wait for read transactions and stop checking busy for write
transactions. The interrupt cycle shall start, in 4-bit mode. If the
Suspend command fails, the Host Controller shall maintain its current
state, and the Host Driver shall restart the transfer by setting Continue
Request in the Block Gap Control register.
• Resume Command
The Host Driver re-starts the data transfer by restoring the registers in
the range of 000-00Dh. (Refer to Suspend and Resume mechanism)
The Host Controller shall check for busy before starting write transfers.
• Abort Command
If this command is set when executing a read transfer, the Host
Controller shall stop reads to the buffer. If this command is set when
executing a write transfer, the Host Controller shall stop driving the
DAT line. After issuing the Abort command, the Host Driver should
issue a software reset. (Refer to Abort Transaction)
11b = Abort CMD12, CMD52 for writing “I/O Abort” in CCCR
10b = Resume CMD52 for writing “Function Select” in CCCR
01b = Suspend CMD52 for writing “Bus Suspend” in CCCR
00b = Normal Other commands
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-26
Name Bit Description Initial Value
DATAPRNT [5]
Data Present Select
This bit is set to 1 to indicate that data is present and shall be
transferred using the DAT line. It is set to 0 for the following:
(1) Commands using only CMD line (ex. CMD52).
(2) Commands with no data transfer but using busy signal on DAT[0]
line (R1b or R5b ex. CMD38)
(3) Resume command
1 = Data Present
0 = No Data Present
ENCMDIDX [4]
Command Index Check Enable
If this bit is set to 1, the Host Controller shall check the Index field in
the response to see if it has the same value as the command index. If it
is not, it is reported as a Command Index Error. If this bit is set to 0, the
Index field is not checked.
1 = Enable
0 = Disable
ENCMDCR
C [3] Command CRC Check Enable
If this bit is set to 1, the Host Controller shall check the CRC field in the
response. If an error is detected, it is reported as a Command CRC
Error. If this bit is set to 0, the CRC field is not checked. The number of
bits checked by the CRC field value changes according to the length of
the response.
1 = Enable
0 = Disable
[2]
Reserved
RSPTYP [1:0]
Response Type Select
00 = No Response
01 = Response Length 136
10 = Response Length 48
11 = Response Length 48 check Busy after response
Table 21-2. Relation Between Parameters and the Name of Response Type
Response Type Index Check
Enable CRC Check
Enable Name of Response Type
00 0 0 No Response
01 0 1 R2
10 0 0 R3, R4
10 1 1 R1, R6, R5, R7
11 1 1 R1b, R5b
These bits determine Response types.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-27
NOTES:
1. In the SDIO specification, response type notation of R5b is not defined. R5 includes R5b in the SDIO specification.
But R5b is defined in this specification to specify the Host Controller shall check busy after receiving response. For
example, usually CMD52 is used as R5 but I/O abort command shall be used as R5b.
2. For CMD52 to read BS after writing "Bus Suspend," Command Type should be "Suspend" as well.
5.8 RESPONSE REGISTER
This register is used to store responses from SD cards.
Register Address R/W Description Reset Value
RSPREG0_0 0X4AC00010 ROC Response Register 0 (Channel 0) 0x0
RSPREG1_0 0X4AC00014 ROC Response Register 1 (Channel 0) 0x0
RSPREG2_0 0X4AC00018 ROC Response Register 2 (Channel 0) 0x0
RSPREG3_0 0X4AC0001C ROC Response Register 3 (Channel 0) 0x0
Register Address R/W Description Reset Value
RSPREG0_1 0X4A800010 ROC Response Register 0 (Channel 1) 0x0
RSPREG1_1 0X4A800014 ROC Response Register 1 (Channel 1) 0x0
RSPREG2_1 0X4A800018 ROC Response Register 2 (Channel 1) 0x0
RSPREG3_1 0X4A80001C ROC Response Register 3 (Channel 1) 0x0
Name Bit Description Initial Value
CMDRSP [127:0]
Command Response
The Table below describes the mapping of command responses from
the SD Bus to this register for each response type. In the table, R[]
refers to a bit range within the response data as transmitted on the SD
Bus, REP[] refers to a bit range within the Response register.
128-bit Response bit order : {RSPREG3, RSPREG2, RSPREG1,
RSPREG0}
Table 21-3. Response Bit Definition for Each Response Type.
Kind of Response Meaning of Response Response Field Response Register
R1, R1b (normal response) Card Status R [39:8] REP [31:0]
R1b (Auto CMD12 response) Card Status for Auto CMD12 R [39:8] REP [127:96]
R2 (CID, CSD register) CID or CSD reg. incl. R [127:8] REP [119:0]
R3 (OCR register) OCR register for memory R [39:8] REP [31:0]
R4 (OCR register) OCR register for I/O etc R [39:8] REP [31:0]
R5,R5b SDIO response R [39:8] REP [31:0]
R6 (Published RCA response) New published RCA[31:16] etc R [39:8] REP [31:0]
R7 ? R [39:8] REP [31:0]
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-28
The Response Field indicates bit positions of “Responses” defined in the PHYSICAL LAYER SPECIFICATION
Version 1.01. The Table (upper) shows that most responses with a length of 48 (R[47:0]) have 32 bits of the
response data (R[39:8]) stored in the Response register at REP[31:0]. Responses of type R1b (Auto CMD12
responses) have response data bits R[39:8] stored in the Response register at REP[127:96]. Responses with
length 136 (R[135:0]) have 120 bits of the response data (R[127:8]) stored in the Response register at
REP[119:0].
To be able to read the response status efficiently, the Host Controller only stores part of the response data in the
Response register. This enables the Host Driver to efficiently read 32 bits of response data in one read cycle on a
32-bit bus system. Parts of the response, the Index field and the CRC, are checked by the Host Controller (as
specified by the Command Index Check Enable and the Command CRC Check Enable bits in the Command
register) and generate an error interrupt if an error is detected. The bit range for the CRC check depends on the
response length. If the response length is 48, the Host Controller shall check R[47:1], and if the response length is
136 the Host Controller shall check R[119:1].
Since the Host Controller may have a multiple block data DAT line transfer executing concurrently with a
CMD_wo_DAT command, the Host Controller stores the Auto CMD12 response in the upper bits (REP[127:96]) of
the Response register. The CMD_wo_DAT response is stored in REP[31:0]. This allows the Host Controller to
avoid overwriting the Auto CMD12 response with the CMD_wo_DAT and vice versa.
When the Host Controller modifies part of the Response register, as shown in the Table above, it shall preserve
the unmodified bits.
NOTE: CMD_wo_DAT (Command without Data line) means the command not to use data line. The command set of this type
depends on the card type (MMC, SD/SDIO or CE-ATA). Generally, the command using data line receives contents
through “Buffer Data Port Register”, but the command without using data line receives contents through “RESPONSE
register” in the Host Controller.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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5.9 BUFFER DATA PORT REGISTER
32-bit data port register to access internal buffer.
Register Address R/W Description Reset Value
BDATA0 0X4AC00020 R/W Buffer Data Register (Channel 0) −
BDATA1 0X4A800020 R/W Buffer Data Register (Channel 1) −
Name Bit Description Initial Value
BUFDAT [31:0]
Buffer Data
The Host Controller buffer can be accessed through this 32-bit Data
Port register.
−
Detailed documents are to be copied from SD Host Standard Spec.
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
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5.10 PRESENT STATE REGISTER
This register contains the SD Command Argument.
Register Address R/W Description Reset Value
PRNSTS0 0X4AC00024 RO/ROC
Present State Register (Channel 0) 0x000A0000
PRNSTS1 0X4A800024 RO/ROC
Present State Register (Channel 1) 0x000A0000
Name Bit Description Initial Value
[31:25]
Reserved 0
PRNTCMD [24] CMD Line Signal Level (RO)
This status is used to check the CMD line level to recover from
errors, and for debugging.
Note: CMD port is mapped to SDx_CMD pin
0
PRNTDAT [23:20] DAT[3:0] Line Signal Level (RO)
This status is used to check the DAT line level to recover from
errors, and for debugging. This is especially useful in detecting the
busy signal level from DAT[0].
D23 = DAT[3]
D22 = DAT[2]
D21 = DAT[1]
D20 = DAT[0]
Note: DAT port is mapped to SDx_DAT pin
Line
State
PRNTWP [19] Write Protect Switch Pin Level (RO)
The Write Protect Switch is supported for memory and combo cards.
This bit reflects the SDWP# pin.
1 = Write enabled (SDWP#=1)
0 = Write protected (SDWP#=0)
Note: SDWP# of channel 0 is fixed to High.
1
PRNTCD [18] Card Detect Pin Level (RO)
This bit reflects the inverse value of the SDCD# pin. Debouncing is
not performed on this bit. This bit may be valid when Card State
Stable is set to 1, but it is not guaranteed because of propagation
delay. Use of this bit is limited to testing since it must be debounced
by software.
1 = Card present (SDCD#=0)
0 = No card present (SDCD#=1)
Note: SDCD# of Channel 0 is fixed to LOW.
Line
State
STBLCARD [17] Card State Stable (RO)
This bit is used for testing. If it is 0, the Card Detect Pin Level is not
stable. If this bit is set to 1, it means the Card Detect Pin Level is
stable. No Card state can be detected by this bit is set to 1 and Card
Inserted is set to 0. The Software Reset For All in the Software
Reset register shall not affect this bit.
1 = No Card or Inserted
1
(After Reset)
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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Name Bit Description Initial Value
0 = Reset or Debouncing
INSCARD [16] Card Inserted (RO)
This bit indicates whether a card has been inserted. The Host
Controller shall debounce this signal so that the Host Driver will not
need to wait for it to stabilize. Changing from 0 to 1 generates a
Card Insertion interrupt in the Normal Interrupt Status register and
changing from 1 to 0 generates a Card Removal interrupt in the
Normal Interrupt Status register. The Software Reset For All in the
Software Reset register shall not affect this bit. If a card is removed
while its power is on and its clock is oscillating, the Host Controller
shall clear SD Bus Power in the Power Control register and SD
Clock Enable in the Clock Control register.
When this bit is changed from 1 to 0, the Host Controller shall
immediately stop driving CMD and DAT[3:0] (tri-state). In addition,
the Host Driver should clear the Host Controller by the Software
Reset For All in Software Reset register. The card detect is active
regardless of the SD Bus Power.
1 = Card Inserted
0 = Reset or Debouncing or No Card
0
[15:14]
Reserved
DIFF4W [13]
FIFO Pointer Difference 4-Word (ROC)
When the difference of the address pointer between AHB side and
SD side is more than or equal to 4-word, this status bit is set to
HIGH. When others clears automatically.
Write(Tx) mode : when this bit is HIGH, more than or equal to 4-
word can be written by CPU side.
Read(Rx) mode : when this bit is HIGH, more than or equal to 4-
word can be read by CPU side.
0
DIFF1W [12]
FIFO Pointer Difference 1-Word (ROC)
When the difference of the address pointer between AHB side and
SD side is more than or equal to 1-word, this status bit is set to
HIGH. When others clears automatically.
Write(Tx) mode : when this bit is HIGH, more than or equal to 1-
word can be written by CPU side.
Read(Rx) mode : when this bit is HIGH, more than or equal to 1-
word can be read by CPU side.
0
BUFRDRDY [11] Buffer Read Enable (ROC)
This status is used for non-DMA read transfers. The Host Controller
may implement multiple buffers to transfer data efficiently. This read
only flag indicates that valid data exists in the host side buffer status.
If this bit is 1, readable data exists in the buffer. A change of this bit
from 1 to 0 occurs when all the block data is read from the buffer. A
change of this bit from 0 to 1 occurs when block data is ready in the
buffer and generates the Buffer Read Ready interrupt.
1 = Read enable
0 = Read disable
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-32
Name Bit Description Initial Value
BUFWTRDY [10] Buffer Write Enable (ROC)
This status is used for non-DMA write transfers. The Host Controller
can implement multiple buffers to transfer data efficiently. This read
only flag indicates if space is available for write data. If this bit is 1,
data can be written to the buffer. A change of this bit from 1 to 0
occurs when all the block data is written to the buffer. A change of
this bit from 0 to 1 occurs when top of block data can be written to
the buffer and generates the Buffer Write Ready interrupt.
1 = Write enable
0 = Write disable
0
RDTRANACT [9] Read Transfer Active (ROC)
This status is used for detecting completion of a read transfer.
This bit is set to 1 for either of the following conditions:
(1) After the end bit of the read command.
(2) When writing a 1 to Continue Request in the Block Gap Control
register to restart a read transfer.
This bit is cleared to 0 for either of the following conditions::
(1) When the last data block as specified by block length is
transferred to the System.
(2) When all valid data blocks have been transferred to the System
and no current block transfers are being sent as a result of the Stop
At Block Gap Request being set to 1. A Transfer Complete
interrupt is generated when this bit changes to 0.
1 = Transferring data
0 = No valid data
0
WTTRANACT [8] Write Transfer Active (ROC)
This status indicates a write transfer is active. If this bit is 0, it means
no valid write data exists in the Host Controller.
This bit is set in either of the following cases:
(1) After the end bit of the write command.
(2) When writing a 1 to Continue Request in the Block Gap Control
register to restart a write transfer.
This bit is cleared in either of the following cases:
(1) After getting the CRC status of the last data block as specified by
the transfer count (Single and Multiple)
(2) After getting the CRC status of any block where data
transmission is about to be stopped by a Stop At Block Gap
Request.
During a write transaction, a Block Gap Event interrupt is
generated when this bit is changed to 0, as result of the Stop At
Block Gap Request being set. This status is useful for the Host
Driver in determining when to issue commands during write busy.
1 = Transferring data
0 = No valid data
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-33
Name Bit Description Initial Value
[7:3]
Reserved 0
DATLINEACT [2] DAT Line Active (ROC)
This bit indicates whether one of the DAT line on SD Bus is in use.
(a) In the case of read transactions
This status indicates if a read transfer is executing on the SD Bus.
Changes in this value from 1 to 0 between data blocks generate a
Block Gap Event interrupt in the Normal Interrupt Status register.
This bit shall be set in either of the following cases:
(1) After the end bit of the read command.
(2) When writing a 1 to Continue Request in the Block Gap Control
register to restart a read transfer.
This bit shall be cleared in either of the following cases:
(1) When the end bit of the last data block is sent from the SD Bus
to the Host Controller.
(2) When beginning a wait read transfer at a stop at the block gap
initiated by a Stop At Block Gap Request.
The Host Controller shall wait at the next block gap by driving Read
Wait at the start of the interrupt cycle. If the Read Wait signal is
already driven (data buffer cannot receive data), the Host Controller
can wait for current block gap by continuing to drive the Read Wait
signal. It is necessary to support Read Wait in order to use the
suspend / resume function.
(b) In the case of write transactions
This status indicates that a write transfer is executing on the SD
Bus. Changes in this value from 1 to 0 generate a Transfer
Complete interrupt in the Normal Interrupt Status register.
This bit shall be set in either of the following cases:
(1) After the end bit of the write command.
(2) When writing to 1 to Continue Request in the Block Gap Control
register to continue a write transfer.
This bit shall be cleared in either of the following cases:
(1) When the SD card releases write busy of the last data block the
Host Controller shall also detect if output is not busy. If SD card
does not drive busy signal for 8 SD Clocks, the Host Controller shall
consider the card drive “Not Busy”.
(2) When the SD card releases write busy prior to waiting for write
transfer as a result of a Stop At Block Gap Request.
1 = DAT Line Active
0 = DAT Line Inactive
0
CMDINHDAT [1] Data Inhibit (DAT) (ROC)
This status bit is generated if either the DAT Line Active or the
Read Transfer Active is set to 1. If this bit is 0, it indicates the Host
Controller can issue the next SD Command. Commands with busy
signal belong to Command Inhibit (DAT) (ex. R1b, R5b type).
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-34
Name Bit Description Initial Value
Changing from 1 to 0 generates a Transfer Complete interrupt in
the Normal Interrupt Status register.
Note: The SD Host Driver can save registers in the range of 000-
00Dh for a suspend transaction after this bit has changed from 1 to
0.
1 = Cannot issue command which uses the DAT line
0 = Can issue command which uses the DAT line
CMDINHCMD [0] Command Inhibit (CMD) (ROC)
If this bit is 0, it indicates the CMD line is not in use and the Host
Controller can issue a SD Command using the CMD line.
This bit is set immediately after the Command register (00Fh) is
written. This bit is cleared when the command response is received.
Even if the Command Inhibit (DAT) is set to 1, Commands using
only the CMD line can be issued if this bit is 0. Changing from 1 to 0
generates a Command
Complete interrupt in the Normal Interrupt Status register. If the
Host Controller cannot issue the command because of a command
conflict error (Refer to Command CRC Error) or because of
Command Not Issued By Auto CMD12 Error, this bit shall remain
1 and the Command Complete is not set. Status issuing Auto
CMD12 is not read from this bit.
1 = Cannot issue command
0 = Can issue command using only CMD line
0
NOTE: Buffer Write Enable in Present register should not be asserted for DMA transfers since it generates Buffer Write
Ready interrupt
Reset
Power ON
Debouncing
Once debouncing
clock becomes valid
Card Inserted
No Card
SDCD=1
SDCD=0
Stable
Stable
Figure 21-13. Card Detect State
The above Figure shows the state definitions of hardware that handles “Debouncing”.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-35
Figure 21-14. Timing of Command Inhibit (DAT) and Command Inhibit (CMD) with data transfer
Figure 21-15. Timing of Command Inhibit (DAT) for the case of response with busy
Figure 21-16. Timing of Command Inhibit (CMD) for the case of no response command
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-36
5.11 HOST CONTROL REGISTER
This register contains the SD Command Argument.
Register Address R/W Description Reset Value
HOSTCTL0 0X4AC00028 R/W Present State Register (Channel 0) 0x0
HOSTCTL1 0X4A800028 R/W Present State Register (Channel 1) 0x0
Name Bit Description Initial Value
CDSIGSEL [7]
Reserved
This field should be fixed to LOW
0
CDTESTLVL [6]
Reserved
This field should be fixed to LOW
0
WIDE8 [5] Extended Data Transfer Width (It is for MMC 8bit card.)
1 = 8 bit operation
0 = the bit width is designated by the bit 1 (Data Transfer Width)
0
DMASEL [4:3]
DMA Select
One of supported DMA modes can be selected. The host driver shall
check support of DMA modes by referring the Capabilities register.
Use of selected DMA is determined by DMA Enable of the Transfer
Mode register.
00 = SDMA is selected
01 = Reserved
10 = 32-bit Address ADMA2 is selected
11 = 64-bit Address ADMA2 is selected (Not supported)
0
ENHIGHSPD [2]
High Speed Enable
This bit is optional. Before setting this bit, the Host Driver shall check
the High Speed Support in the Capabilities register. If this bit is set
to 0 (default), the Host Controller outputs CMD line and DAT lines at
the falling edge of the SD Clock (up to 25MHz). If this bit is set to 1,
the Host Controller outputs CMD line and DAT lines at the rising edge
of the SD Clock (up to 50MHz).
1 = High Speed mode
0 = Normal Speed mode
0
WIDE4 [1]
Data Transfer Width
This bit selects the data width of the Host Controller. The Host Driver
shall set it to match the data width of the SD card.
1 = 4-bit mode
0 = 1-bit mode
0
ONLED [0]
LED Control
This bit is used to caution the user not to remove the card while the
SD card is being accessed. If the software is going to issue multiple
SD commands, this bit can be set during all these transactions. It is
not necessary to change for each transaction.
1 = LED on
0 = LED off
Note: LED port is mapped to SD0_LED pin
0
NOTE: Card Detect Pin Level does not simply reflect SDCD# pin, but chooses from SDCD, DAT[3], or CDTestlvl depending
on CDSSigSel and SDCDSel values.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-37
5.12 POWER CONTROL REGISTER
This register contains the SD Command Argument.
Register Address R/W Description Reset Value
PWRCON0 0X4AC00029 R/W Present State Register (Channel 0) 0x0
PWRCON1 0X4A800029 R/W Present State Register (Channel 1) 0x0
Name Bit Description Initial Value
[7:4] Reserved
SELPWRLVL [3:1]
SD Bus Voltage Select
By setting these bits, the Host Driver selects the voltage level for the
SD card. Before setting this register, the Host Driver shall check the
Voltage Support bits in the Capabilities register. If an unsupported
voltage is selected, the Host System shall not supply SD Bus voltage.
111b = 3.3V (Typ.)
110b = 3.0V (Typ.)
101b = 1.8V (Typ.)
100b − 000b = Reserved
0
PWRON [0]
SD Bus Power
Before setting this bit, the SD Host Driver shall set SD Bus Voltage
Select. If the Host Controller detects the No Card state, this bit shall
be cleared.
If this bit is cleared, the Host Controller shall immediately stop driving
CMD and DAT[3:0] (tri-state) and drive SDCLK to low level.
1 = Power on
0 = Power off
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-38
5.13 BLOCK GAP CONTROL REGISTER
This register contains the SD Command Argument.
Register Address R/W Description Reset Value
BLKGAP0 0X4AC0002A R/W Block Gap Control Register (Channel 0) 0x0
BLKGAP1 0X4A80002A R/W Block Gap Control Register (Channel 1) 0x0
Name Bit Description Initial Value
[7:4] Reserved 0
ENINTBGAP [3]
Interrupt At Block Gap
This bit is valid only in 4-bit mode of the SDIO card and selects a sample
point in the interrupt cycle. Setting to 1 enables interrupt detection at the
block gap for a multiple block transfer. Setting to 0 disables interrupt
detection during a multiple block transfer. If the SD card cannot signal
an interrupt during a multiple block transfer, this bit should be set to 0.
When the Host Driver detects an SD card insertion, it shall set this bit
according to the CCCR of the SDIO card. (RW)
1 = Enabled
0 = Disabled
0
ENRWAIT [2]
Read Wait Control
The read wait function is optional for SDIO cards. If the card supports
read wait, set this bit to enable use of the read wait protocol to stop read
data using the DAT[2] line. Otherwise the Host Controller has to stop the
SD Clock to hold read data, which restricts commands generation.
When the Host Driver detects an SD card insertion, it shall set this bit
according to the CCCR of the SDIO card. If the card does not support
read wait, this bit shall never be set to 1 otherwise DAT line conflict may
occur. If this bit is set to 0, Suspend/Resume cannot be supported. (RW)
1 = Enable Read Wait Control
0 = Disable Read Wait Control
0
CONTREQ [1]
Continue Request
This bit is used to restart a transaction which was stopped using the
Stop At Block Gap Request. To cancel stop at the block gap, set Stop
At Block Gap Request to 0 and set this bit 1 to restart the transfer.
The Host Controller automatically clears this bit in either of the following
cases:
(1) In the case of a read transaction, the DAT Line Active changes from
0 to 1 as a read transaction restarts.
(2) In the case of a write transaction, the Write Transfer Active
changes from 0 to 1 as the write transaction restarts.
Therefore it is not necessary for Host Driver to set this bit to 0. If Stop At
Block Gap Request is set to 1, any write to this bit is ignored. (RWAC)
1 = Restart
0 = Not affect
0
STOPBGAP [0]
Stop At Block Gap Request 0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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Name Bit Description Initial Value
This bit is used to stop executing a transaction at the next block gap for
both DMA and non-DMA transfers. Until the Transfer Complete is set to
1, indicating a transfer completion the Host Driver shall leave this bit set
to 1.
Clearing both the Stop At Block Gap Request and Continue Request
shall not cause the transaction to restart. Read Wait is used to stop the
read transaction at the block gap. The Host Controller shall honor Stop
At Block Gap Request for write transfers, but for read transfers it
requires that the SD card support Read Wait. Therefore the Host Driver
shall not set this bit during read transfers unless the SD card supports
Read Wait and has set Read Wait Control to 1. In the case of write
transfers in which the Host Driver writes data to the Buffer Data Port
register, the Host Driver shall set this bit after all block data is written. If
this bit is set to 1, the Host Driver shall not write data to Buffer Data Port
register.
This bit affects Read Transfer Active, Write Transfer Active, DAT
Line Active and Command Inhibit (DAT) in the Present State register.
Regarding detailed control of bits D01 and D00. (RW)
‘1’ = Stop
‘0’ = Transfer
There are three cases to restart the transfer after stop at the block gap. Which case is appropriate depends on
whether the Host Controller issues a Suspend command or the SD card accepts the Suspend command.
(1) If the Host Driver does not issue a Suspend command, the Continue Request shall be used to restart the
transfer.
(2) If the Host Driver issues a Suspend command and the SD card accepts it, a Resume command shall be used
to restart the transfer.
(3) If the Host Driver issues a Suspend command and the SD card does not accept it, the Continue Request
shall be used to restart the transfer.
Any time Stop At Block Gap Request stops the data transfer, the Host Driver shall wait for Transfer Complete
(in the Normal Interrupt Status register) before attempting to restart the transfer. When restarting the data transfer
by Continue Request, the Host Driver shall clear Stop At Block Gap Request before or simultaneously.
NOTE: After setting Stop at Block Gap Request field, which should not be cleared unless Block Gap Event or Transfer
Complete interrupt occurs. Otherwise, the module hangs.
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
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5.14 WAKEUP CONTROL REGISTER
This register is mandatory for the Host Controller, but wakeup functionality depends on the Host Controller system
hardware and software. The Host Driver shall maintain voltage on the SD Bus, by setting SD Bus Power to 1 in
the Power Control register, when wakeup event via Card Interrupt is desired.
Register Address R/W Description Reset Value
WAKCON0 0X4AC0002B R/W Wakeup Control Register (Channel 0) 0x0
WAKCON1 0X4A80002B R/W Wakeup Control Register (Channel 1) 0x0
Name Bit Description Initial Value
[7:3] Reserved 0
ENWKUPREM [2]
Wakeup Event Enable On SD Card Removal
This bit enables wakeup event via Card Removal assertion in the
Normal Interrupt Status register. FN_WUS (Wake Up Support) in
CIS does not affect this bit. (RW)
1 = Enable
0 = Disable
0
ENWKUPINS [1]
Wakeup Event Enable On SD Card Insertion
This bit enables wakeup event via Card Insertion assertion in the
Normal Interrupt Status register. FN_WUS (Wake Up Support) in
CIS does not affect this bit. (RW)
1 = Enable
0 = Disable
0
ENWKUPINT [0]
Wakeup Event Enable On Card Interrupt
This bit enables wakeup event via Card Interrupt assertion in the
Normal Interrupt Status register. This bit can be set to 1 if FN_WUS
(Wake Up Support) in CIS is set to 1. (RW)
1 = Enable
0 = Disable
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-41
5.15 CLOCK CONTROL REGISTER
At the initialization of the Host Controller, the Host Driver shall set the SDCLK Frequency Select according to the
Capabilities register.
Register Address R/W Description Reset Value
CLKCON0 0X4AC0002C R/W Command Register (Channel 0) 0x0
CLKCON1 0X4A80002C R/W Command Register (Channel 1) 0x0
Name Bit Description Initial Value
SELFREQ [15:8]
SDCLK Frequency Select
This register is used to select the frequency of SDCLK pin. The
frequency is not programmed directly; rather this register holds the
divisor of the Base Clock Frequency For SD Clock in the
Capabilities register. Only the following settings are allowed.
80h base clock divided by 256
40h base clock divided by 128
20h base clock divided by 64
10h base clock divided by 32
08h base clock divided by 16
04h base clock divided by 8
02h base clock divided by 4
01h base clock divided by 2
00h base clock (10MHz-63MHz)
Setting 00h specifies the highest frequency of the SD Clock. When
setting multiple bits, the most significant bit is used as the divisor. But
multiple bits should not be set. The two default divider values can be
calculated by the frequency that is defined by the Base Clock
Frequency For SD Clock in the Capabilities register.
(1) 25MHz divider value
(2) 400kHz divider value
According to the SD Physical Specification Version 1.01 and the
SDIO Card Specification Version 1.0, maximum SD Clock frequency
is 25MHz, and shall never exceed this limit.
The frequency of SDCLK is set by the following formula:
Clock Frequency = (Base Clock) / divisor
Thus, choose the smallest possible divisor which results in a clock
frequency that is less than or equal to the target frequency.
For example, if the Base Clock Frequency For SD Clock in the
Capabilities register has the value 33MHz, and the target frequency is
25MHz, then choosing the divisor value of 01h will yield 16.5MHz,
which is the nearest frequency less than or equal to the target.
Similarly, to approach a clock value of 400kHz, the divisor value of
40h yields the optimal clock value of 258kHz.
0
[7:4]
Reserved
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-42
Name Bit Description Initial Value
STBLEXTCLK [3]
External Clock Stable
This bit is set to 1 when SD Clock output is stable after writing to SD
Clock Enable in this register to 1. The SD Host Driver shall wait to
issue command to start until this bit is set to 1. (ROC)
1 = Ready
0 = Not Ready
0
ENSDCLK [2]
SD Clock Enable
The Host Controller shall stop SDCLK when writing this bit to 0.
SDCLK Frequency Select can be changed when this bit is 0. Then,
the Host Controller shall maintain the same clock frequency until
SDCLK is stopped (Stop at SDCLK=0). If the Card Inserted in the
Present State register is cleared, this bit shall be cleared. (RW)
1 = Enable
0 = Disable
0
STBLINTCLK [1]
Internal Clock Stable
This bit is set to 1 when SD Clock is stable after writing to Internal
Clock Enable in this register to 1. The SD Host Driver shall wait to
set SD Clock Enable until this bit is set to 1.
Note: This is useful when using PLL for a clock oscillator that requires
setup time. (ROC)
1 = Ready
0 = Not Ready
0
ENINTCLK [0]
Internal Clock Enable
This bit is set to 0 when the Host Driver is not using the Host
Controller or the Host Controller awaits a wakeup interrupt. The Host
Controller should stop its internal clock to go very low power state.
Still, registers shall be able to be read and written. Clock starts to
oscillate when this bit is set to 1. When clock oscillation is stable, the
Host Controller shall set Internal Clock Stable in this register to 1.
This bit shall not affect card detection. (RW)
1 = Oscillate
0 = Stop
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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5.16 TIMEOUT CONTROL REGISTER
At the initialization of the Host Controller, the Host Driver shall set the Data Timeout Counter Value according to
the Capabilities register.
Register Address R/W Description Reset Value
TIMEOUTCON 0 0X4AC0002E R/W Timeout Control Register (Channel 0) 0x0
TIMEOUTCON 1 0X4A80002E R/W Timeout Control Register (Channel 1) 0x0
Name Bit Description Initial Value
[7:4] Reserved 0
TIMEOUTCON [3:0]
Data Timeout Counter Value
This value determines the interval by which DAT line timeouts are
detected. Refer to the Data Timeout Error in the Error Interrupt
Status register for information on factors that dictate timeout
generation. Timeout clock frequency will be generated by dividing the
base clock SDCLK value by this value. When setting this register,
prevent inadvertent timeout events by clearing the Data Timeout
Error Status Enable (in the Error Interrupt Status Enable register)
1111b Reserved
1110b SDCLK x 227
1101b SDCLK x 226
………….. …
0001b SDCLK x 214
0000b SDCLK x 213
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
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5.17 SOFTWARE RESET REGISTER
A reset pulse is generated when writing 1 to each bit of this register. After completing the reset, the Host
Controller shall clear each bit. Because it takes some time to complete software reset, the SD Host Driver shall
confirm that these bits are 0.
Register Address R/W Description Reset Value
SWRST0 0X4AC0002F R/W Software Reset Register (Channel 0) 0x0
SWRST1 0X4A80002F R/W Software Reset Register (Channel 1) 0x0
Name Bit Description Initial Value
[7:3] Reserved 0
RSTDAT [2]
Software Reset For DAT Line
Only part of data circuit is reset. DMA circuit is also reset. (RWAC)
The following registers and bits are cleared by this bit:
Present State register
Buffer Read Enable
Buffer Write Enable
Read Transfer Active
Write Transfer Active
DAT Line Active
Command Inhibit (DAT)
Block Gap Control register
Continue Request
Stop At Block Gap Request
Normal Interrupt Status register
Buffer Read Ready
Buffer Write Ready
DMA Interrupt
Block Gap Event
Transfer Complete
1 = Reset
0 = Work
0
RSTCMD [1]
Software Reset For CMD Line
Only part of command circuit is reset. (RWAC)
The following registers and bits are cleared by this bit:
Present State register
Command Inhibit (CMD)
Normal Interrupt Status register
Command Complete
1 = Reset
0 = Work
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
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Name Bit Description Initial Value
RSTDAT [0]
Software Reset For All
This reset affects the entire Host Controller except for the card
detection circuit. Register bits of type ROC, RW, RW1C, RWAC are
cleared to 0.
During its initialization, the Host Driver shall set this bit to 1 to reset the
Host Controller. The Host Controller shall reset this bit to 0 when
capabilities registers are valid and the Host Driver can read them.
Additional use of Software Reset For All may not affect the value of
the Capabilities registers. If this bit is set to 1, the SD card shall reset
itself and must be reinitialized by the Host Driver. (RWAC)
1 = Reset
0 = Work
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
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5.18 NORMAL INTERRUPT STATUS REGISTER
The Normal Interrupt Status Enable affects reads of this register, but Normal Interrupt Signal Enable does not
affect these reads. An interrupt is generated when the Normal Interrupt Signal Enable is enabled and at least one
of the status bits is set to 1. For all bits except Card Interrupt and Error Interrupt, writing 1 to a bit clear it; writing
to 0 keeps the bit unchanged. More than one status can be cleared with a single register write. The Card
Interrupt is cleared when the card stops asserting the interrupt; that is, when the Card Driver services the
interrupt condition.
Register Address R/W Description Reset Value
NORINTSTS0 0X4AC00030 ROC/RW1C Normal Interrupt Status Register (Channel 0) 0x0
NORINTSTS1 0X4A800030 ROC/RW1C Normal Interrupt Status Register (Channel 1) 0x0
Name Bit Description Initial Value
STAERR [15]
Error Interrupt
If any of the bits in the Error Interrupt Status register are set, then
this bit is set. Therefore the Host Driver can efficiently test for an
error by checking this bit first. This bit is read only. (ROC)
0 = No Error
1 = Error
0
STAFIA3 [14] FIFO SD Address Pointer Interrupt 3 Status (RW1C)
0 = Occurred
1 = Not Occurred
0
STAFIA2 [13] FIFO SD Address Pointer Interrupt 2 Status (RW1C)
0 = Occurred
1 = Not Occurred
0
STAFIA1 [12] FIFO SD Address Pointer Interrupt 1 Status (RW1C)
0 = Occurred
1 = Not Occurred
0
STAFIA0 [11] FIFO SD Address Pointer Interrupt 0 Status (RW1C)
0 = Occurred
1 = Not Occurred
0
STARWAIT [10] Read Wait Interrupt Status (RW1C)
0 = Read Wait Interrupt Occurred
1 = Read Wait Interrupt Not Occurred
Note: After checking response for the suspend command, release Read
Wait interrupt status manually if BS = 0
0
STACCS [9] CCS Interrupt Status (RW1C)
Command Complete Singal Interrupt Status bit is for CE-ATA
interface mode.
0 = CCS Interrupt Occurred
1 = CCS Interrupt Not Occurred
0
STACARDINT [8]
Card Interrupt
Writing this bit to 1 does not clear this bit. It is cleared by resetting
the SD card interrupt factor. In 1-bit mode, the Host Controller shall
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-47
Name Bit Description Initial Value
detect the Card Interrupt without SD Clock to support wakeup. In
4-bit mode, the card interrupt signal is sampled during the interrupt
cycle, so there are some sample delays between the interrupt
signal from the SD card and the interrupt to the Host System. It is
necessary to define how to handle this delay.
When this status has been set and the Host Driver needs to start
this interrupt service, Card Interrupt Status Enable in the Normal
Interrupt Status Enable register shall be set to 0 in order to clear
the card interrupt statuses latched in the Host Controller and to
stop driving the interrupt signal to the Host System. After
completion of the card interrupt service (It should reset interrupt
factors in the SD card and the interrupt signal may not be
asserted), set Card Interrupt Status Enable to 1 and start
sampling the interrupt signal again. (ROC, RW1C)
1 = Generate Card Interrupt
0 = No Card Interrupt
STACARDREM [7]
Card Removal
This status is set if the Card Inserted in the Present State register
changes from 1 to 0. When the Host Driver writes this bit to 1 to
clear this status, the status of the Card Inserted in the Present
State register should be confirmed. Because the card detect state
may possibly be changed when the Host Driver clear this bit and
interrupt event may not be generated. (RW1C)
1 = Card removed
0 = Card state stable or Debouncing
0
STACARDINS [6]
Card Insertion
This status is set if the Card Inserted in the Present State register
changes from 0 to 1. When the Host Driver writes this bit to 1 to
clear this status, the status of the Card Inserted in the Present
State register should be confirmed. Because the card detect state
may possibly be changed when the Host Driver clear this bit and
interrupt event may not be generated. (RW1C)
1 = Card inserted
0 = Card state stable or Debouncing
0
STABUFRDRDY [5]
Buffer Read Ready
This status is set if the Buffer Read Enable changes from 0 to 1.
Refer to the Buffer Read Enable in the Present State register.
(RW1C)
1 = Ready to read buffer
0 = Not ready to read buffer
0
STABUFWTRDY [4]
Buffer Write Ready
This status is set if the Buffer Write Enable changes from 0 to 1.
Refer to the Buffer Write Enable in the Present State register.
(RW1C)
1 = Ready to write buffer
0 = Not ready to write buffer
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-48
Name Bit Description Initial Value
STADMAINT [3]
DMA Interrupt
This status is set if the Host Controller detects the Host DMA
Buffer boundary during transfer. Refer to the Host DMA Buffer
Boundary in the Block Size register. Other DMA interrupt factors
may be added in the future. This interrupt shall not be generated
after the Transfer Complete. (RW1C)
1 = DMA Interrupt is generated
0 = No DMA Interrupt
0
STABLKGAP [2]
Block Gap Event
If the Stop At Block Gap Request in the Block Gap Control
register is set, this bit is set when both a read / write transaction is
stopped at a block gap. If Stop At Block Gap Request is not set
to 1, this bit is not set to 1.
(1) In the case of a Read Transaction
This bit is set at the falling edge of the DAT Line Active Status
(When the transaction is stopped at SD Bus timing. The Read Wait
must be supported in order to use this function.
(2) Case of Write Transaction
This bit is set at the falling edge of Write Transfer Active Status
(After getting CRC status at SD Bus timing).
1 = Transaction stopped at block gap
0 = No Block Gap Event
0
STATRANCMPLT [1] Transfer Complete
This bit is set when a read / write transfer is completed.
(1) In the case of a Read Transaction
This bit is set at the falling edge of Read Transfer Active Status.
There are two cases in which this interrupt is generated. The first is
when a data transfer is completed as specified by data length
(After the last data has been read to the Host System). The second
is when data has stopped at the block gap and completed the data
transfer by setting the Stop At Block Gap Request in the Block
Gap Control register (After valid data has been read to the Host
System).
(2) In the case of a Write Transaction
This bit is set at the falling edge of the DAT Line Active Status.
There are two cases in which this interrupt is generated. The first is
when the last data is written to the SD card as specified by data
length and the busy signal released. The second is when data
transfers are stopped at the block gap by setting Stop At Block
Gap Request in the Block Gap Control register and data transfers
completed. (After valid data is written to the SD card and the busy
signal released). (RW1C)
The table below shows that Transfer Complete has higher priority
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-49
Name Bit Description Initial Value
than Data Timeout Error. If both bits are set to 1, the data transfer
can be considered complete.
Relation between Transfer Complete and Data
Transfer
Complete Data Timeout
Error Meaning of the status
0 0 Interrupted by another factor
0 1 Timeout occur during transfer
1 Don’t care Data transfer complete
1 = Data Transfer Complete
0 = No transfer complete
STACMDCMPLT [0]
Command Complete
This bit is set when get the end bit of the command response.
(Except Auto
CMD12) Refer to Command Inhibit (CMD) in the Present State
register.
The table below shows that Command Timeout Error has higher
priority than Command Complete. If both bits are set to 1, it can
be considered that the response was not received correctly.
Command
Complete Command
Timeout Error Meaning of the status
0 0 Interrupted by another factor
Don’t care 1 Response not received within
64 SDCLK cycles.
1 0 Response received
1 = Command Complete
0 = No command complete
0
NOTES:
1. Host Driver may check if interrupt is actually cleared by polling or monitoring the INTREQ port. If HCLK is much faster
than SDCLK, it takes long time to be cleared for the bits actually.
2. Card Interrupt status bit keeps previous value until next card interrupt period (level interrupt) and can be cleared when
write to 1 (RW1C).
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-50
5.19 ERROR INTERRUPT STATUS REGISTER
Signals defined in this register can be enabled by the Error Interrupt Status Enable register, but not by the Error
Interrupt Signal Enable register. The interrupt is generated when the Error Interrupt Signal Enable is enabled and
at least one of the statuses is set to 1. Writing to 1 clears the bit and writing to 0 keeps the bit unchanged. More
than one status can be cleared at the one register write.
Register Address R/W Description Reset Value
ERRINTSTS0 0X4AC00032 ROC/RW1C Error Interrupt Status Register (Channel 0) 0x0
ERRINTSTS1 0X4A800032 ROC/RW1C Error Interrupt Status Register (Channel 1) 0x0
Name Bit Description Initial Value
[15:10] Reserved 0
ADMAERR [9]
ADMA Error
This bit is set when the Host Controller detects errors during
ADMA based data transfer. The state of the ADMA at an error
occurrence is saved in the ADMA Error Status Register, In
addition, the Host Controller generates this Interrupt when it
detects invalid descriptor data (Valid=0) at the ST_FDS state.
ADMA Error State in the ADMA Error Status indicates that an
error occurs in ST_FDS state. The Host Driver may find that
Valid bit is not set at the error descriptor.
1 = Error
0 = No Error
0
STAACMDERR [8]
Auto CMD12 Error
Occurs when detecting that one of the bits in Auto CMD12 Error
Status register has changed from 0 to 1. This bit is set to 1,not
only when the errors in Auto CMD12 occur but also when Auto
CMD12 is not executed due to the previous command error.
1 = Error
0 = No Error
0
STACURERR [7]
Current Limit Error
Not implemented in this version. Always 0.
0
STADENDERR [6]
Data End Bit Error
Occurs either when detecting 0 at the end bit position of read
data which uses the DAT line or at the end bit position of the
CRC Status.
1 = Error
0 = No Error
0
STADATCRCERR [5]
Data CRC Error
Occurs when detecting CRC error when transferring read data
which uses the DAT line or when detecting the Write CRC
status having a value of other than "010".
1 = Error
0 = No Error
0
STADATTOUTERR [4]
Data Timeout Error 0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-51
Name Bit Description Initial Value
Occurs when detecting one of following timeout conditions.
(1) Busy timeout for R1b,R5b type
(2) Busy timeout after Write CRC status
(3) Write CRC Status timeout
(4) Read Data timeout.
1 = Timeout
0 = No Error
STACMDIDXERR [3]
Command Index Error
Occurs if a Command Index error occurs in the command
response.
1 = Error
0 = No Error
0
CMDEBITERR [2]
Command End Bit Error
Occurs when detecting that the end bit of a command response
is 0.
1 = End bit Error generated
0 = No Error
STACMDCRCERR [1]
Command CRC Error
Command CRC Error is generated in two cases.
(1) If a response is returned and the Command Timeout Error
is set to 0 (indicating no timeout), this bit is set to 1 when
detecting a CRC error in the command response.
(2) The Host Controller detects a CMD line conflict by
monitoring the CMD line when a command is issued. If the Host
Controller drives the CMD line to 1 level, but detects 0 level on
the CMD line at the next SDCLK edge, then the Host Controller
shall abort the command (Stop driving CMD line) and set this bit
to 1. The Command Timeout Error shall also be set to 1 to
distinguish CMD line conflict.
1 = CRC Error generated
0 = No Error
0
STACMDTOUTERR [0]
Command Timeout Error
Occurs only if no response is returned within 64 SDCLK cycles
from the end bit of the command. If the Host Controller detects a
CMD line conflict, in which case Command CRC Error shall
also be set as shown in Table 33, this bit shall be set without
waiting for 64 SDCLK cycles because the command will be
aborted by the Host Controller.
1 = Timeout
0 = No Error
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-52
The relation between Command CRC Error and Command Timeout Error is shown in Table below.
Table 21-4. The relation between Command CRC Error and Command Timeout Error
Command CRC Error Command Timeout Error Kinds of error
0 0 No Error
0 1 Response Timeout Error
1 0 Response CRC Error
1 1 CMD line conflict
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-53
5.20 NORMAL INTERRUPT STATUS ENABLE REGISTER
Setting to 1 enables Interrupt Status.
Register Address R/W Description Reset Value
NORINTSTSEN0 0X4AC00034 R/W Normal Interrupt Status Enable Register
(Channel 0) 0x0
NORINTSTSEN1 0X4A800034 R/W Normal Interrupt Status Enable Register
(Channel 1) 0x0
Name Bit Description Initial Value
[15]
Fixed to 0
The Host Driver shall control error interrupts using the Error
Interrupt Status Enable register. (RO)
0
ENSTAFIA3
[14]
FIFO SD Address Pointer Interrupt 3 Status Enable
1 = Enabled
0 = Masked
0
ENSTAFIA2
[13]
FIFO SD Address Pointer Interrupt 2 Status Enable
1 = Enabled
0 = Masked
0
ENSTAFIA1
[12]
FIFO SD Address Pointer Interrupt 1 Status Enable
1 = Enabled
0 = Masked
0
ENSTAFIA0
[11]
FIFO SD Address Pointer Interrupt 0 Status Enable
1 = Enabled
0 = Masked
0
ENSTARWAIT
[10]
Read Wait interrupt status enable
1 = Enabled
0 = Masked
0
ENSTACCS
[9]
CCS Interrupt Status Enable
1 = Enabled
0 = Masked
0
ENSTACARDINT
[8]
Card Interrupt Status Enable
If this bit is set to 0, the Host Controller shall clear interrupt
request to the System. The Card Interrupt detection is
stopped when this bit is cleared and restarted when this bit is
set to 1. The Host Driver should clear the Card Interrupt
Status Enable before servicing the Card Interrupt and
should set this bit again after all interrupt requests from the
card are cleared to prevent inadvertent interrupts.
1 = Enabled
0 = Masked
0
ENSTACARDREM
[7]
Card Removal Status Enable
1 = Enabled
0 = Masked
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-54
Name Bit Description Initial Value
ENSTACARDNS
[6]
Card Insertion Status Enable
1 = Enabled
0 = Masked
0
ENSTABUFRDRDY
[5]
Buffer Read Ready Status Enable
1 = Enabled
0 = Masked
0
ENSTABUFWTRDY
[4]
Buffer Write Ready Status Enable
1 = Enabled
0 = Masked
0
ENSTADMA
[3]
DMA Interrupt Status Enable
1 = Enabled
0 = Masked
0
ENSTABLKGAP
[2]
Block Gap Event Status Enable
1 = Enabled
0 = Masked
0
ENSTASTANSCMPLT
[1]
Transfer Complete Status Enable
1 = Enabled
0 = Masked
0
ENSTACMDCMPLT
[0]
Command Complete Status Enable
1 = Enabled
0 = Masked
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-55
5.21 ERROR INTERRUPT STATUS ENABLE REGISTER
Setting to 1 enables Error Interrupt Status.
Register Address R/W Description Reset Value
ERRINTSTSEN0 0X4AC00036 R/W Error Interrupt Status Enable Register
(Channel 0) 0x0
ERRINTSTSEN1 0X4A800036 R/W Error Interrupt Status Enable Register
(Channel 1) 0x0
Name Bit Description Initial Value
[15:10] Reserved 0
ADMAERR [9]
ADMA Error Status Enable
1 = Enabled
0 = Masked
0
ENSTAACMDERR [8]
Auto CMD12 Error Status Enable
1 = Enabled
0 = Masked
0
ENSTACURERR [7]
Current Limit Error Status Enable
This function is not implemented in this version.
1 = Enabled
0 = Masked
0
ENSTADENDERR [6]
Data End Bit Error Status Enable
1 = Enabled
0 = Masked
0
ENSTADATCRCERR [5]
Data CRC Error Status Enable
1 = Enabled
0 = Masked
0
ENSTADATTOUTERR [4]
Data Timeout Error Status Enable
1 = Enabled
0 = Masked
0
ENSTACMDIDXERR [3]
Command Index Error Status Enable
1 = Enabled
0 = Masked
0
ENSTACMDEBITERR [2]
Command End Bit Error Status Enable
1 = Enabled
0 = Masked
0
ENSTACMDCRCERR [1]
Command CRC Error Status Enable
1 = Enabled
0 = Masked
0
ENSTACMDTOUTERR [0] Command Timeout Error Status Enable
1 = Enabled
0 = Masked
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-56
5.22 NORMAL INTERRUPT SIGNAL ENABLE REGISTER
This register is used to select which interrupt status is indicated to the Host System as the interrupt. These status
bits all share the same1 bit interrupt line. Setting any of these bits to 1 enables interrupt generation.
Register Address R/W Description Reset Value
NORINTSIGEN0 0X4AC00038 R/W Normal Interrupt Signal Enable Register
(Channel 0) 0x0
NORINTSIGEN1 0X4A800038 R/W Normal Interrupt Signal Enable Register
(Channel 1) 0x0
Name Bit Description Initial Value
[15]
Fixed to 0
The Host Driver shall control error interrupts using the Error
Interrupt Signal Enable register.
0
ENSIGFIA3 [14]
FIFO SD Address Pointer Interrupt 3 Signal Enable
1 = Enabled
0 = Masked
0
ENSIGFIA2 [13]
FIFO SD Address Pointer Interrupt 2 Signal Enable
1 = Enabled
0 = Masked
0
ENSIGFIA1 [12]
FIFO SD Address Pointer Interrupt 1 Signal Enable
1 = Enabled
0 = Masked
0
ENSIGFIA0 [11]
FIFO SD Address Pointer Interrupt 0 Signal Enable
1 = Enabled
0 = Masked
0
ENSIGRWAIT [10]
Read Wait Interrupt Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCCS [9]
CCS Interrupt Signal Enable
Command Complete Signal Interrupt Status bit is for CE-ATA
interface mode.
1 = Enabled
0 = Masked
0
ENSIGCARDINT [8]
Card Interrupt Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCARDREM [7]
Card Removal Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCARDNS [6]
Card Insertion Signal Enable
1 = Enabled
0 = Masked
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-57
Name Bit Description Initial Value
ENSIGBUFRDRDY [5]
Buffer Read Ready Signal Enable
1 = Enabled
0 = Masked
0
ENSIGBUFWTRDY [4]
Buffer Write Ready Signal Enable
1 = Enabled
0 = Masked
0
ENSIGDMA [3]
DMA Interrupt Signal Enable
1 = Enabled
0 = Masked
0
ENSIGBLKGAP [2]
Block Gap Event Signal Enable
1 = Enabled
0 = Masked
0
ENSIGSTANSCMPLT [1] Transfer Complete Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCMDCMPLT [0]
Command Complete Signal Enable
1 = Enabled
0 = Masked
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-58
5.23 ERROR INTERRUPT SIGNAL ENABLE REGISTER
This register is used to select which interrupt status is notified to the Host System as the interrupt. These status
bits all share the same 1 bit interrupt line. Setting any of these bits to 1 enables interrupt generation.
Register Address R/W Description Reset Value
ERRINTSIGEN0 0X4AC0003A R/W Error Interrupt Signal Enable Register (Channel 0) 0x0
ERRINTSIGEN1 0X4A80003A R/W Error Interrupt Signal Enable Register (Channel 1) 0x0
Name Bit Description Initial Value
[15:10] Reserved 0
ENSIGADMAERR [9]
ADMA Error Signal Enable
1 = Enabled
0 = Masked
0
ENSIGACMDERR [8]
Auto CMD12 Error Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCURERR [7]
Current Limit Error Signal Enable
This function is not implemented in this version.
1 = Enabled
0 = Masked
0
ENSIGDENDERR [6]
Data End Bit Error Signal Enable
1 = Enabled
0 = Masked
0
ENSIGDATCRCERR [5]
Data CRC Error Signal Enable
1 = Enabled
0 = Masked
0
ENSIGDATTOUTERR [4]
Data Timeout Error Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCMDIDXERR [3]
Command Index Error Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCMDEBITERR [2]
Command End Bit Error Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCMDCRCERR [1]
Command CRC Error Signal Enable
1 = Enabled
0 = Masked
0
ENSIGCMDTOUTERR [0]
Command Timeout Error Signal Enable
1 = Enabled
0 = Masked
0
Detailed documents are to be copied from SD Host Standard Spec.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-59
5.24 AUTOCMD12 ERROR STATUS REGISTER
When Auto CMD12 Error Status is set, the Host Driver shall check this register to identify what kind of error Auto
CMD12 indicated. This register is valid only when the Auto CMD12 Error is set.
Register Address R/W Description Reset Value
ACMD12ERRSTS0 0X4AC0003C ROC Auto CMD12 Error Status Register (Channel 0) 0x0
ACMD12ERRSTS1 0X4A80003C ROC Auto CMD12 Error Status Register (Channel 1) 0x0
Name Bit Description Initial Value
[15:8] Reserved 0
STANCMDAER [7]
Command Not Issued By Auto CMD12 Error
Setting this bit to 1 means CMD_wo_DAT is not executed due to
an Auto CMD12 Error (D04-D01) in this register.
1 = Not Issued
0 = No error
0
[6:5]
Reserved 0
STACMDIDXERR [4]
Auto CMD12 Index Error
Occurs if the Command Index error occurs in response to a
command.
1 = Error
0 = No Error
0
STACMDEBITAER [3]
Auto CMD12 End Bit Error
Occurs when detecting that the end bit of command response is
0.
1 = End Bit Error Generated
0 = No Error
0
STACMDCRCAER [2]
Auto CMD12 CRC Error
Occurs when detecting a CRC error in the command response.
1 = CRC Error Generated
0 = No Error
0
STACMDTOUTAER [1]
Auto CMD12 Timeout Error
Occurs if no response is returned within 64 SDCLK cycles from
the end bit of command. If this bit is set to1, the other error
status bits (D04-D02) are meaningless.
1 = Time out
0 = No Error
0
STANACMDAER [0]
Auto CMD12 Not Executed
If memory multiple block data transfer is not started due to
command error, this bit is not set because it is not necessary to
issue Auto CMD12. Setting this bit to 1 means the Host
Controller cannot issue Auto CMD12 to stop memory multiple
block data transfer due to some error. If this bit is set to 1, other
error status bits (D04-D01) are meaningless.
1 = Not executed
0 = Executed
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-60
The relation between Auto CMD12 CRC Error and Auto CMD12 Timeout Error is shown below.
Table 21-5. The Relation Between Command CRC Error and Command Timeout Error
Auto CMD12 CRC Error Auto CMD12 Timeout Error Kinds of error
0 0 No Error
0 1 Response Timeout Error
1 0 Response CRC Error
1 1
CMD line conflict
The timing of changing Auto CMD12 Error Status can be classified in three scenarios:
(1) When the Host Controller is going to issue Auto CMD12
Set D00 to 1 if Auto CMD12 cannot be issued due to an error in the previous command.
Set D00 to 0 if Auto CMD12 is issued.
(2) At the end bit of an Auto CMD12 response
Check received responses by checking the error bits D01, D02, D03 and D04.
Set to 1 if error is detected.
Set to 0 if error is not detected.
(3) Before reading the Auto CMD12 Error Status bit D07
Set D07 to 1 if there is a command cannot be issued
Set D07 to 0 if there is no command to issue
Timing of generating the Auto CMD12 Error and writing to the Command register are asynchronous. Then D07
shall be sampled when driver never writing to the Command register. So just before reading the Auto CMD12
Error Status register is good timing to set the D07 status bit. An Auto CMD12 Error Interrupt is generated when
one of the error bits D00 to D04 is set to 1. The Command Not Issued By Auto CMD12 Error does not generate
an interrupt.
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-61
5.25 CAPABILITIES REGISTER
This register provides the Host Driver with information specific to the Host Controller implementation. The Host
Controller may implement these values as fixed or loaded from flash memory during power on initialization. Refer
to Software Reset for All in the Software Reset register for loading from flash memory and completion timing
control.
Register Address R/W Description Reset Value
CAPAREG0 0X4AC00040 HWInit Capabilities Register (Channel 0) 0x05E80080
CAPAREG1 0X4A800040 HWInit Capabilities Register (Channel 1) 0x05E80080
Name Bit Description Initial Value
[31:27] Reserved
CAPAV18 [26] Voltage Support 1.8V (HWInit)
1 = 1.8V Supported
0 = 1.8V Not Supported
1
CAPAV30 [25] Voltage Support 3.0V (HWInit)
1 = 3.0V Supported
0 = 3.0V Not Supported
0
CAPAV33 [24] Voltage Support 3.3V (HWInit)
1 = 3.3V Supported
0 = 3.3V Not Supported
1
CAPASUSRES [23] Suspend/Resume Support (HWInit)
This bit indicates whether the Host Controller supports
Suspend / Resume functionality. If this bit is 0, the Suspend
and Resume mechanism are not supported and the Host
Driver shall not issue either Suspend or Resume commands.
1 = Supported
0 = Not Supported
1
CAPADMA [22] DMA Support (HWInit)
This bit indicates whether the Host Controller is capable of
using DMA to transfer data between system memory and the
Host Controller directly.
1 = DMA Supported
0 = DMA Not Supported
1
CAPAHSPD [21] High Speed Support (HWInit)
This bit indicates whether the Host Controller and the Host
System support High Speed mode and they can supply SD
Clock frequency from 25MHz to 50MHz.
1 = High Speed Supported
0 = High Speed Not Supported
1
[20:18]
Reserved
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-62
Name Bit Description Initial Value
CAPAMAXBLKLEN [17:16] Max Block Length (HWInit)
This value indicates the maximum block size that the Host
Driver can read and write to the buffer in the Host Controller.
The buffer shall transfer this block size without wait cycles.
Three sizes can be defined as indicated below.
00 = 512-byte
01 = 1024-byte
10 = 2048-byte
11 = Reserved
0
[15:14] Reserved 0
CAPABASECLK [13:8] Base Clock Frequency For SD Clock (HWInit)
This value indicates the base (maximum) clock frequency for
the SD Clock. Unit values are 1MHz. If the real frequency is
16.5MHz, the lager value shall be set 01 0001b (17MHz)
because the Host Driver use this value to calculate the clock
divider value (Refer to the SDCLK Frequency Select in the
Clock Control register.) and it shall not exceed upper limit of
the SD Clock frequency. The supported clock range is 10MHz
to 63MHz. If these bits are all 0, the Host System has to get
information via another method.
Not 0 = 1MHz to 63MHz
000000b = Get information via another method
0
CAPATOUTUNIT [7] Timeout Clock Unit (HWInit)
This bit shows the unit of base clock frequency used to detect
Data Timeout Error.
0 = kHz
1 = MHz
1
[6]
Reserved 0
CAPATOUTCLK [5:0] Timeout Clock Frequency (HWInit)
This bit shows the base clock frequency used to detect Data
Timeout Error. The Timeout Clock Unit defines the unit of
this field value.
Timeout Clock Unit =0 [kHz] unit: 1kHz to 63kHz
Timeout Clock Unit =1 [MHz] unit: 1MHz to 63MHz
Not 0 = 1kHz to 63kHz or 1MHz to 63MHz
00 0000b = Get information via another method
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-63
5.26 MAXIMUM CURRENT CAPABILITIES REGISTER
These registers indicate maximum current capability for each voltage. The value is meaningful if Voltage Support
is set in the Capabilities register. If this information is supplied by the Host System via another method, all
Maximum Current Capabilities register shall be 0.
Register Address R/W Description Reset Value
MAXCURR0 0X4AC00048 HWInit Maximum Current Capabilities Register
(Channel 0) 0x0
MAXCURR1 0X4A800048 HWInit Maximum Current Capabilities Register
(Channel 1) 0x0
Name Bit Description Initial Value
[31:24] Reserved
MAXCURR18 [23:16] Maximum Current for 1.8V (HWInit) 0
MAXCURR30 [15:8] Maximum Current for 3.0V (HWInit) 0
MAXCURR33 [7:0] Maximum Current for 3.3V (HWInit) 0
This register measures current in 4mA steps. Each voltage level’s current support is described using the Table
below.
Table 21-6. Maximum Current Value Definition
Register Value Current Value
0 Get information via another method
1 4mA
2 8mA
3 12mA
… …
255 1020mA
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-64
5.27 CONTROL REGISTER 2
Register Address R/W Description Reset Value
CONTROL2_0 0X4AC00080 R/W Control register 2 (Channel 0) 0x0
CONTROL2_1 0X4A800080 R/W Control register 2 (Channel 1) 0x0
Name Bit Description Initial Value
[31]
Write Status Clear Async Mode Enable
This bit can make async-clear enable about Normal and Error
interrupt status bit. During the initialization procedure
command operation, this bit should be enabled.
0 = Disable
1 = Enable
0
CDINVRXD3 [30]
Command Conflict Mask Enable
This bit can mask enable the Command Conflict Status (bit
[1:0] of the “ERROR INTERRUPT STATUS REGISTER”)
0 = Mask Disable
1 = Mask Enable
0
CDINVRXD3 [29]
Card Detect signal inversion for RX_DAT[3]
0 = Disable
1 = Enable
0
SELCARDOUT [28]
Card Removed Condition Selection
0 = Card Removed condition is “Not Card Insert” State (When
the transition from “Card Inserted” state to “Debouncing”
state)
1 = Card Removed state is “Card Out” State (When the
transition from “Debouncing state to “No Card” state)
0
FLTCLKSEL [27:24] Filter Clock (iFLTCLK) Selection
Filter Clock period = 2^(FltClkSel + 5) x iSDCLK period
0000 = 25 x iSDCLK, 0001 = 26 x iSDCLK … 1111 = 220 x
iSDCLK
0
LVLDAT [23:16] DAT line level
Bit[23]=DAT[7], BIT[22]=DAT[6], BIT[21]=DAT[5],
BIT[20]=DAT[4],
Bit[19]=DAT[3], BIT[18]=DAT[2], BIT[17]=DAT[1],
BIT[16]=DAT[0]
(Read Only)
Line state
ENFBCLKTX [15]
Feedback Clock Enable for Tx Data/Command Clock
0 = Disable
1 = Enable
0
ENFBCLKRX [14]
Feedback Clock Enable for Rx Data/Command Clock
0 = Disable
1 = Enable
0
SDCDSEL [13]
SD Card Detect Signal Selection 0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-65
Name Bit Description Initial Value
Card Detect Pin Level does not simply reflect SDCD# pin, but
chooses from SDCD, DAT[3], or CDTestlvl depending on
CDSigSel and this field (SDCDSel) values
0 = nSDCD is used for SD Card Detect Signal
1 = DAT[3] is used for SD Card Detect Signal
CDSYNCSEL [12]
SD Card Detect Sync Support
This field is used to enable output CMD and DAT referencing
SD Bus Power bit in the “PWRCON register”, when being set.
0 = No Sync, no switch output enable signal (Command,
Data)
1 = Sync, control output enable signal (Command, Data)
0
ENBUSYCHKTXSTA
RT [11] CE-ATA I/F mode
Busy state check before Tx Data start state
0 = Disable
1 = Enable
0
DFCNT [10:9]
Debounce Filter Count
Debounce Filter Count setting register for Card Detect signal
input (SDCD#)
00 = No use debounce filter
01 = 4 iSDCLK
10 = 16 iSDCLK
11 = 64 iSDCLK
0
ENCLKOUTHOLD [8]
SDCLK Hold Enable
The enter and exit of the SDCLK Hold state is done by Host
Controller.
0 = Disable
1 = Enable
0
RWAITMODE [7]
Read Wait Release Control
0 = Read Wait state is released by the Host Controller (Auto)
1 = Read Wait state is released by the Host Device (Manual)
0
DISBUFRD [6]
Buffer Read Disable
0 = Normal mode, user can read buffer(FIFO) data using
0x20 register
1 = User cannot read buffer (FIFO) data using 0x20 register.
In this case, the buffer memory only can be read through
memory area. (Debug purpose)
0
SELBASECLK [5:4]
Base Clock Source Select
00 or 01 = HCLK
10 = SCLK_HSMMC# : EPLLout, MPLLout, PLL_source_clk
or CLK27 clock (from SYSCON block, can be selected by
MMC#_SEL[1:0] fields of the CLK_SRC register in SYSCON
block)
11 = External Clock source (XTI or XEXTCLK)
00
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-66
Name Bit Description Initial Value
PWRSYNC [3]
SD OP Power Sync Support with SD Card
This field is used to enable input CMD and DAT referencing
SD Bus Power bit in the “PWRCON register”, when being set.
0 = No Sync, no switch input enable signal (Command, Data)
1 = Sync, control input enable signal (Command, Data)
0
[2]
Reserved 0
ENCLKOUTMSKCON [1] SDCLK output clock masking when Card Insert cleared
This field when High is used not to stop SDCLK when No
Card state.
0 = Disable
1 = Enable
0
HWINITFIN [0]
SD Host Controller Hardware Initialization Finish
0 = Not Finish
1 = Finish
0
NOTES:
1. Ensure to always set SDCLK Hold Enable (EnSCHold) if the card does not support Read Wait to guarantee for Receive
data not overwritten to the internal FIFO memory.
2. CMD_wo_DAT issue is prohibited during READ transfer when SDCLK Hold Enable is set
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-67
5.28 CONTROL REGISTER 3
Register Address R/W Description Reset Value
CONTROL3_0 0X4AC00084 R/W FIFO Interrupt Control (Control Register 3)
(Channel 0) 0x7F5F3F1F
CONTROL3_1 0X4A800084 R/W FIFO Interrupt Control (Control Register 3)
(Channel 1) 0x7F5F3F1F
Name Bit Description Initial Value
FCSEL3 [31]
Feedback Clock Select [3]
Reference (note 1)
0x0
FIA3 [30:24]
FIFO Interrupt Address register 3
FIFO (512Byte Buffer memory, word address unit)
Initial value (0x7F) generates at 512-byte (128-word) position.
0x7F
FCSEL2 [23]
Feedback Clock Select [2]
Reference (note 1)
0x0
FIA2 [22:16]
FIFO Interrupt Address register 2
FIFO (512Byte Buffer memory, word address unit)
Initial value (0x5F) generates at 384-byte (96-word) position.
0x5F
FCSEL1 [15]
Feedback Clock Select [1]
Reference (note 2)
0x0
FIA1 [14:8]
FIFO Interrupt Address register 1
FIFO (512Byte Buffer memory, word address unit)
Initial value (0x3F) generates at 256-byte (64-word) position.
0x3F
FCSEL0 [7]
Feedback Clock Select [0]
Reference (note 2)
0x0
FIA0 [6:0]
FIFO Interrupt Address register 0
FIFO (512Byte Buffer memory, word address unit)
Initial value (0x1F) generates at 128-byte (32-word) position.
0x1F
NOTES:
1. FCSel[3:2] : Tx Feedback Clock Delay Control : Inverter delay means 10ns delay when SDCLK 50MHz setting
01 = Delay1 (basic delay), 11 = Delay2 (basic delay + 2ns),
00 = Delay3 (inverter delay), 10 = Delay4 (inverter delay + 2ns)
2. FCSel[1:0] : Rx Feedback Clock Delay Control : Inverter delay means10ns delay when SDCLK 50MHz setting
01 = Delay1 (basic delay), 11 = Delay2 (basic delay + 2ns),
00 = Delay3 (inverter delay), 10 = Delay4 (inverter delay + 2ns)
3. Tx Feedback inversion setting (FCSel[3:2] = 00 or 10), Tx Feedback clock enable (ENFBCLKTX=0) and
Normal Speed mode (ENHIGHSPD = 0) setting make Tx data transfer mismatch (Do not set).
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-68
5.29 DEBUG REGISTER
Register Address R/W Description Reset Value
DEBUG_0 0X4AC00088 R/W DEBUG register (Channel 0) Not fixed
DEBUG_1 0X4A800088 R/W DEBUG register (Channel 1) Not fixed
Name Bit Description Initial Value
DBGREG [31:0]
Debug Register
Read Only Register for Debug Purpose (RO)
Not fixed
5.30 CONTROL REGISTER 4
Register Address R/W Description Reset Value
CONTROL4_0 0x4AC0008C R/W Control register 4 (Channel 0) 0x0
CONTROL4_1 0x4A80008C R/W Control register 4 (Channel 1) 0x0
Name Bit Description Initial Value
Reserved [31:1]
− 0
StaBusy [0]
Status Busy
This bit is “High” when the clock domain crossing (HCLK to SDCLK)
operation is processing. This bit is status bit and Read Only (RO)
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-69
5.31 FORCE EVENT REGISTER FOR AUTO CMD12 ERROR STATUS
Register Address R/W Description Reset Value
FEAER0 0X4AC00050 WO Force Event Auto CMD12 Error Interrupt
Register Error Interrupt (Channel 0) 0x0000
FEAER1 0X4A800050 WO Force Event Auto CMD12 Error Interrupt
Register Error Interrupt (Channel 1) 0x0000
The Force Event Register is not a physically implemented register. Rather, it is an address at which the Auto
CMD12 Error Status Register can be written.
• Writing 1: set each bit of the Auto CMD12 Error Status Register
• Writing 0: no effect
D15 D12
Name Bit Description Initial Value
[15:8] − 0x0
[7] Force Event for Command Not Issued By Auto CMD12 Error
1 = Interrupt is generated
0 = No Interrupt
0
[6:5] − 0
[4] Force Event for Auto CMD12 Index Error
1 = Interrupt is generated
0 = No Interrupt
0
[3] Force Event for Auto CMD12 End Bit Error
1 = Interrupt is generated
0 = No Interrupt
0
[2] Force Event for Auto CMD12 CRC Error
1 = Interrupt is generated
0 = No Interrupt
0
[1] Force Event for Auto CMD12 Timeout Error
1 = Interrupt is generated
0 = No Interrupt
0
[0] Force Event for Auto CMD12 Not Executed
1 = Interrupt is generated
0 = No Interrupt
0
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-70
5.32 FORCE EVENT REGISTER FOR ERROR INTERRUPT STATUS
Register Address R/W Description Reset Value
FEERR0 0X4AC00052 WO Force Event Error Interrupt Register Error Interrupt
(Channel 0) 0x0000
FEERR1 0X4A800052 WO Force Event Error Interrupt Register Error Interrupt
(Channel 1) 0x0000
The Force Event Register is not a physically implemented register. Rather, it is an address at which the Error
Interrupt Status register can be written. The effect of a write to this address will be reflected in the Error Interrupt
Status Register if the corresponding bit of the Error Interrupt Status Enable Register is set.
• Writing 1: set each bit of the Error Interrupt Status Register
• Writing 0: no effect
Note: By setting this register, the Error Interrupt can be set in the Error Interrupt Status register. In order to generate
interrupt signal, both the Error Interrupt Status Enable and Error Interrupt Signal Enable shall be set.
Name Bit Description Initial Value
[15:10] Reserved 0x0
[9]
Force Event for ADMA Error
1 = Interrupt is generated
0 = No Interrupt
0
[8]
Force Event for Auto CMD12 Error
1 = Interrupt is generated
0 = No Interrupt
0
[7] Reserved 0
[6]
Force Event for Data End Bit Error
1 = Interrupt is generated
0 = No Interrupt
0
[5]
Force Event for Data CRC Error
1 = Interrupt is generated
0 = No Interrupt
0
[4]
Force Event for Data Timeout Error
1 = Interrupt is generated
0 = No Interrupt
0
[3]
Force Event for Command Index Error
1 = Interrupt is generated
0 = No Interrupt
0
[2]
Force Event for Command End Bit Error
1 = Interrupt is generated
0 = No Interrupt
0
[1]
Force Event for Command CRC Error
1 = Interrupt is generated
0 = No Interrupt
0
[0]
Force Event for Command Timeout Error
1 = Interrupt is generated
0 = No Interrupt
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-71
5.33 ADMA ERROR STATUS REGISTER
When ADMA Error Interrupt is occurred, the ADMA Error States field in this register holds the ADMA state and
the ADMA System Address Register holds the address around the error descriptor. For recovering the error, the
Host Driver requires the ADMA state to identify the error descriptor address as follows:
• ST_STOP: Previous location set in the ADMA System Address register is the error descriptor address
• ST_FDS: Current location set in the ADMA System Address register is the error descriptor address
• ST_CADR: This sate is never set because do not generate ADMA error in this state.
• ST_TFR: Previous location set in the ADMA System Address register is the error descriptor address
In case of write operation, the Host Driver should use ACMD22 to get the number of written block rather than
using this information, since unwritten data may exist in the Host Controller.
The Host Controller generates the ADMA Error Interrupt when it detects invalid descriptor data (Valid=0) at the
ST_FDS state. In this case, ADMA Error State indicates that an error occurs at ST_FDS state. The Host Driver
may find that the Valid bit is not set in the error descriptor.
Register Address R/W Description Reset Value
ADMAERR0 0X4AC00054 R/W ADMA Error Status Register (Channel 0) 0x00
ADMAERR1 0X4A800054 R/W ADMA Error Status Register (Channel 1) 0x00
Name Bit Description Initial Value
[31:11] Reserved 0x00
[10]
ADMA Final Block Transferred (ROC)
In ADMA operation mode, this field is set to High when the Transfer
Complete condition and the block is final (no block transfer remains).
If this bit is Low when the Transfer Complete condition, Transfer Complete
is done due to the Stop at Block Gap, so data to be transferred still
remains.
0
[9]
ADMA Continue Request (WO)
When the stop state by ADMA Interrupt, ADMA operation continues by
setting this bit to HIGH.
0
[8]
ADMA Interrupt Status (RW1C)
This bit is set to HIGH when INT attribute in the ADMA Descriptor Table is
asserted. This bit is not affected by ADMA error interrupt.
0
[7:3] Reserved 0
[2]
ADMA Length Mismatch Error
This error occurs in the following 2 cases.
(1) While Block Count Enable being set, the total data length specified by
the Descriptor table is different from that specified by the Block Count and
Block Length.
(2) Total data length can not be divided by the block length.
0 = No Error
1 = Error
00
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-72
Name Bit Description Initial Value
[1:0]
ADMA Error State
This field indicates the state of ADMA when error is occurred during
ADMA data transfer. This field never indicates "10" because ADMA never
stops in this state.
D01 − D00 ADMA Error State when error is occurred Contents of
SYS_SDR register
00 = ST_STOP (Stop DMA) Points next of the error descriptor
01 = ST_FDS (Fetch Descriptor) Points the error descriptor
10 = Never set this state (Not used)
11 = ST_TFR (Transfer Data) Points the next of the error descriptor
0
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-73
5.34 ADMA SYSTEM ADDRESS REGISTER
This register contains the physical Descriptor address used for ADMA data transfer.
Register Address R/W Description Reset Value
ADMASYSADDR0 0X4AC00058 R/W ADMA System Address Register (Channel 0) 0x00
ADMASYSADDR1 0X4A800058 R/W ADMA System Address Register (Channel 1) 0x00
Name Bit Description Initial Value
SYSADADMA [31:0]
ADMA System Address
This register holds byte address of executing command of the
Descriptor table.
32-bit Address Descriptor uses lower 32-bit of this register. At the
start of ADMA, the Host Driver shall set start address of the
Descriptor table. The ADMA increments this register address, which
points to next line, when every fetching a Descriptor line. When the
ADMA Error Interrupt is generated, this register shall hold valid
Descriptor address depending on the ADMA state. The Host Driver
shall program Descriptor Table on 32-bit boundary and set 32-bit
boundary address to this register. ADMA2 ignores lower 2-bit of this
register and assumes it to be 00b.
32-bit Address ADMA
Register Value 32-bit System Address
xxxxxxxx 00000000h 00000000h
xxxxxxxx 00000004h 00000004h
xxxxxxxx 00000008h 00000008h
xxxxxxxx 0000000Ch 0000000Ch
…… ……
xxxxxxxx FFFFFFFCh FFFFFFFCh
Note: The data length of the ADMA Descriptor Table should be the word unit
(multiple of the 4-byte).
00
HSMMC CONTROLLER S3C2450X RISC MICROPROCESSOR
21-74
5.35 HOST CONTROLLER VERSION REGISTER
Register Address R/W Description Reset Value
HCVER0 0X4AC000FE HWInit Host Controller Version Register (Channel 0) 0x0401
HCVER1 0X4A8000FE HWInit Host Controller Version Register (Channel 1) 0x0401
Name Bit Description Initial Value
VENVER [15:8]
Vendor Version Number
This status is reserved for the vendor version number. The Host
Driver should not use this status.
0x04 = SDMMC4.0 Host Controller
0x04
SPECVER [7:0]
Specification Version Number
This status indicates the Host Controller Spec. Version. The upper
and lower 4-bits indicate the version
00 = SD Host Specification Version 1.0
01 = SD Host Specification Version 2.00 Including the feature of the
ADMA and Test Register
Others = Reserved
0x01
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-1
22 LCD CONTROLLER
1 OVERVIEW
The LCD controller consists of logic for transferring image data from a video buffer located in system memory to
an external LCD driver interface. LCD driver interface has two kind of interface. One is conventional RGB-
interface and the other is i80-System interface. The LCD controller supports up to two overlay image windows,
which support various color format, 16 level alpha blending, color key, x-y position control, soft scrolling, variable
window size, and etc.
The LCD controller can support the various requirements on the screen related to the number of horizontal and
vertical pixels, data line width for the data interface, interface timing, and refresh rate.
The LCD controller transfers the video data from the frame buffer and generates the necessary control signals
such as, RGB_VSYNC, RGB_HSYNC, RGB_VCLK, RGB_VDEN, and SYS_CS0.... As w ell as the control
signals, LCD controller has the data ports for video data, which are RGB_VD[23:0] and SYS_VD[17:0] as shown
in Figure 22-1.
Figure 22-1. LCD Controller Block diagram
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-2
1.1 FEATURES
1.1.1 The features of LCD controller are:
• Bus Interface 32-bit AMBA AHB Master /AHB Slave
• Video Output Interface RGB Parallel I/F (24-bit)
RGB Serial I/F (8-bit)
i80-System I/F (18-bit)
Supports X,Y indexed position
• PIP (OSD) function
Supports 4-bit Alpha blending :
Plane / Pixel(only supports 24-bit 8:8:8 mode)
• Source format Window 0 :
- Supports 1, 2, 4 or 8-bpp palletized color
- Supports 16, 18 or 24-bpp non-palletized color
Window 1 :
- Supports 1, 2, 4 or 8-bpp palletized color
- Supports 16, 18 or 24-bpp non-palletized color
• Configurable Burst Length Programable 4/ 8/ 16 Burst DMA
• Palette/Look-up table 256 x 25(ARGB) bits palette (2ea for Window 0, Window1)
• Soft Scrolling Horizontal : 1 Byte resloution
Vertical : 1 pixel resolution
• Virtual Screen Virtual image can has up to 1Mbyte image size.
• Transparent Overlay Support Transparent Overlay
• Color Key (Chroma Key) Support Color key function
• Duble Buffering Frame buffer alternating by one control bit
• Dithering Patented 4x4 dither matrix implemetation
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-3
2 FUNCTIONAL DESCRIPTION
2.1 BRIEF OF THE SUB-BLOCK
The LCD controller consists of a VSFR, VDMA, VPRCS, VTIME, and video clock generator. The VSFR has 71
programmable register sets and two-256x25 palette memory, which are used to configure the LCD controller. The
VDMA is a dedicated LCD DMA, which it can transfer the video data in frame memory to VPRCS. By using this
special DMA, the video data can be displayed on the screen without CPU intervention. The VPRCS receives the
video data from VDMA and sends the video data through the data ports (RGB_VD, VEN_VD, or SYS_VD ) to the
display device (LCD) after changing them into a suitable data format, for example 8-bit per pixel mode (8 BPP
Mode) or 16-bit per pixel mode (16 BPP Mode). The VTIME consists of programmable logic to support the
variable requirement of interface timing and rates commonly found in different LCD drivers. The VTIME block
generates RGB_VSYNC, RGB_HSYNC, RGB_VCLK, RGB_VDEN, SYS_CS1, SYS_CS0, and so on.
2.2 DATA FLOW
FIFO is present in the VDMA. When FIFO is empty or partially empty, VDMA requests data fetching from the
frame memory based on the burst memory transfer mode(Consecutive memory fetching of 4 / 8 / 16 words per
one burst request without allowing the bus mastership to another bus master during the bus transfer). When bus
arbitrator in the memory controller accepts this kind of transfer request, there will be 4 /8 /16 successive word data
transfers from system memory to internal FIFO. The each size of FIFO is 32 words. The LCD controller has two
FIFOs because it needs to support the overlay window mode. In case of one screen display mode, the only one
FIFO should be used. The data through FIFO is fetched by VPRCS which has a blending, scheduling function for
the final image data. VPRCS supports overlay function that enables to overlay any image up to 2 window images
whose is smaller or same size can be blended with main window image with programmable alpha blending or
color (chroma) key function. Fig. 22-2 shows the data flow from system bus to the output buffer. VDMA has two
DMA channels. Alpha values written in SFR determine the level of blending. Data from Output buffer will be
appearing to the Video Data Port.
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-4
AMBA
CH0
RGB
CH1
RGB
Win0(RGB) Win1(RGB)
Blending
Color key
OUTPUT(RGB)
Figure 22-2. Block diagram of the Data Flow
2.3 INTERFACE
LCD controller supports 2 types of display device. One type is the conventional RGB-interface that uses RGB
data, Vertical/horizontal sync, data valid signal and data sync clock. The Second type is i80-System interface that
uses address, data, chip select, read/write control and register/status indicating signal. In this type of LCD driver, it
has a frame buffer and has the function of self-refresh, so LCD controller updates one still image by writing only
one time to the LCD.
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-5
2.4 OVERVIEW OF THE COLOR DATA
2.4.1 RGB Data format
The LCD controller requests the specified memory format of frame buffer. The next table shows some examples
of each display mode.
2.4.2 28BPP display (A4+888)
(BSWP = 0, HWSWP = 0, BLD_PIX = 1, ALPHA_SEL = 1)
D[31:28] D[27:24] D[23:0]
000H Dummy Bit Alpha value P1
004H Dummy Bit Alpha value P2
008H Dummy Bit Alpha value P3
...
P1 P2 P3 P4 P5 ......
LCD Panel
NOTE: D[23:16] = Red data, D[15:8] = Green data, D[7:0] = Blue data
In case of BLD_PIX and ALPHA_SEL are set,
D[27:24] = Alpha value, D[23:16] = Red data, D[15:8] = Green data, D[7:0] = Blue data
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-6
2.4.3 25BPP display (A888)
(BSWP = 0, HWSWP = 0)
D[31:25] D[24] D[23:0]
000H Dummy Bit AEN P1
004H Dummy Bit AEN P2
008H Dummy Bit AEN P3
...
P1 P2 P3 P4 P5 ......
LCD Panel
NOTES:
1. AEN : Select Alpha value in Window 1 Alpha Value Register for alpha blending
AEN = 0 : ALPHA0_R/G/B values are applied.
AEN = 1 : ALPHA1_R/G/B values are applied.
Each pixel of LCD panel displays blended color with lower layer window.
Refer to the equation of alpha blending on page 22-22.
2. D[23:16] = Red data, D[15:8] = Green data, D[7:0] = Blue data
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-7
2.4.4 24BPP display (A887)
(BSWP = 0, HWSWP = 0)
D[31:24] D[23] D[22:0]
000H Dummy Bit AEN P1
004H Dummy Bit AEN P2
008H Dummy Bit AEN P3
...
P1 P2 P3 P4 P5 ......
LCD Panel
NOTES:
1. AEN : Select Alpha value in Window 1 Alpha Value Register for alpha blending
AEN = 0 : ALPHA0_R/G/B values are applied.
AEN = 1 : ALPHA1_R/G/B values are applied.
Each pixel of LCD panel displays blended color with lower layer window.
Refer to the equation of alpha blending on page 22-22.
2. D[22:15] = Red data, D[14:7] = Green data, D[6:0] = Blue data
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-8
2.4.5 24BPP display (888)
(BSWP = 0, HWSWP = 0)
D[31:24] D[23:0]
000H Dummy Bit P1
004H Dummy Bit P2
008H Dummy Bit P3
...
P1 P2 P3 P4 P5 ......
LCD Panel
NOTE: D[23:16] = Red data, D[15:8] = Green data, D[7:0] = Blue data
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-9
2.4.6 19BPP display (A666)
(BSWP = 0, HWSWP = 0)
D[31:19] D[18] D[17:0]
000H Dummy Bit AEN P1
004H Dummy Bit AEN P2
008H Dummy Bit AEN P3
...
P1 P2 P3 P4 P5 ......
LCD Panel
NOTES:
1. AEN : Select Alpha value in Window 1 Alpha Value Register for alpha blending
AEN = 0 : ALPHA0_R/G/B values are applied.
AEN = 1 : ALPHA1_R/G/B values are applied.
Each pixel of LCD panel displays blended color with lower layer window.
Refer to the equation of alpha blending on page 22-22.
2. D[17:12] = Red data, D[11:6] = Green data, D[5:0] = Blue data
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-10
2.4.7 18BPP display (666)
(BSWP = 0, HWSWP = 0)
D[31:18] D[17:0]
000H Dummy Bit P1
004H Dummy Bit P2
008H Dummy Bit P3
...
P1 P2 P3 P4 P5 ......
LCD Panel
P1 P2 P3 P4 P5 ......
LCD Panel
NOTE: D[17:12] = Red data, D[11:6] = Green data, D[5:0] = Blue data
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-11
2.4.8 16BPP display (A555)
(BSWP = 0, HWSWP = 0)
D[31] D[30:16] D[15] D[14:0]
000H AEN1 P1 AEN2 P2
004H AEN3 P3 AEN4 P4
008H AEN5 P5 AEN6 P6
...
(BSWP = 0, HWSWP = 1)
[31] D[30:16] D[15] D[14:0]
000H AEN2 P2 AEN1 P1
004H AEN4 P4 AEN3 P3
008H AEN6 P6 AEN5 P5
...
P1 P2 P3 P4 P5 ......
LCD Panel
NOTES:
1. AEN : Select Alpha value in Window 1 Alpha Value Register for alpha blending
AEN = 0 : ALPHA0_R/G/B values are applied.
AEN = 1 : ALPHA1_R/G/B values are applied.
Each pixel of LCD panel displays blended color with lower layer window.
Refer to the equation of alpha blending on page 22-22.
2. D[14:10] = Red data, D[9:5] = Green data, D[4:0] = Blue data
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-12
2.4.9 16BPP display (1+555)
(BSWP = 0, HWSWP = 0)
D[31:16] D[15:0]
000H P1 P2
004H P3 P4
008H P5 P6
...
(BSWP = 0, HWSWP = 1)
D[31:16] D[15:0]
000H P2 P1
004H P4 P3
008H P6 P5
...
NOTE: {D[14:10], D[15] } = Red data, {D[9:5], D[15] } = Green data, {D[4:0], D[15]}= Blue data
Figure 22-3. 16BPP(1+5:5:5, BSWP/HWSWP=0) Display Types
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-13
2.4.10 16BPP display (565)
(BSWP = 0, HWSWP = 0)
D[31:16] D[15:0]
000H P1 P2
004H P3 P4
008H P5 P6
...
(BSWP = 0, HWSWP = 1)
D[31:16] D[15:0]
000H P2 P1
004H P4 P3
008H P6 P5
...
NOTE: D[15:11] = Red data, D[10:5] = Green data, D[4:0] = Blue data
Figure 22-4. 16BPP(5:6:5, BSWP/HWSWP=0) Display Types
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-14
2.4.11 8BPP display (A232)
(BSWP = 0, HWSWP = 0)
D[31] D[30:24] D[23] D[22:16] D[15] D[14:8] D[7] D[6:0]
000H AEN1 P1 AEN2 P2 AEN3 P3 AEN4 P4
004H AEN5 P5 AEN6 P6 AEN7 P7 AEN8 P8
008H AEN9 P9 AEN10 P10 AEN11 P11 AEN12 P12
...
(BSWP = 1, HWSWP = 0)
D[31] D[30:24] D[23] D[22:16] D[15] D[14:8] D[7] D[6:0]
000H AEN4 P4 AEN3 P3 AEN2 P2 AEN1 P1
004H AEN8 P8 AEN7 P7 AEN6 P6 AEN5 P5
008H AEN12 P12 AEN11 P11 AEN10 P10 AEN9 P9
...
P1 P2 P3 P4 P5 ......
LCD Panel
P6 P7 P8 P10 P11 P12P9
NOTES:
1. AEN : Select Alpha value in Window 1 Alpha Value Register for alpha blending
AEN = 0 : ALPHA0_R/G/B values are applied.
AEN = 1 : ALPHA1_R/G/B values are applied.
Each pixel of LCD panel displays blended color with lower layer window.
Refer to the equation of alpha blending on page 22-22.
2. D[6:5] = Red data, D[4:2] = Green data, D[1:0] = Blue data
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-15
2.4.12 8BPP display (Palette)
(BSWP = 0, HWSWP = 0)
D[31:24] D[23:16] D[15:8] D[7:0]
000H P1 P2 P3 P4
004H P5 P6 P7 P8
008H P9 P10 P11 P12
...
(BSWP = 1, HWSWP = 0)
D[31:24] D[23:16] D[15:8] D[7:0]
000H P4 P3 P2 P1
004H P8 P7 P6 P5
008H P12 P11 P10 P9
...
P1 P2 P3 P4 P5 ......
LCD Panel
P6 P7 P8 P10 P11 P12P9
NOTE: The values of frame buffer are index of palette memory.
The MSB value of Palette memory is AEN bit.
AEN : Select Alpha value in Window 1 Alpha Value Register for alpha blending
AEN = 0 : ALPHA0_R/G/B values are applied.
AEN = 1 : ALPHA1_R/G/B values are applied.
Each pixel of LCD panel displays blended color with lower layer window.
Refer to the equation of alpha blending on page 22-22.
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-16
2.4.13 4BPP display (Palette)
(BSWP = 0, HWSWP = 0)
D[31:28] D[27:24] D[23:20] D[19:16] D[15:12] D[11:8] D[7:4] D[3:0]
000H P1 P2 P3 P4 P5 P6 P7 P8
004H P9 P10 P11 P12 P13 P14 P15 P16
008H P17 P18 P19 P20 P21 P22 P23 P24
...
(BSWP = 1, HWSWP = 0)
D[31:28] D[27:24] D[23:20] D[19:16] D[15:12] D[11:8] D[7:4] D[3:0]
000H P7 P8 P5 P6 P3 P4 P1 P2
004H P15 P16 P13 P14 P11 P12 P9 P10
008H P23 P24 P21 P22 P19 P20 P17 P18
...
NOTE: The values of frame buffer are index of palette memory.
The MSB value of Palette memory is AEN bit.
AEN : Select Alpha value in Window 1 Alpha Value Register for alpha blending
AEN = 0 : ALPHA0_R/G/B values are applied.
AEN = 1 : ALPHA1_R/G/B values are applied.
Each pixel of LCD panel displays blended color with lower layer window.
Refer to the equation of alpha blending on page 22-22.
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-17
2.4.14 2BPP display (Palette)
(BSWP = 0, HWSWP = 0)
[31:30] [29:28] [27:26] [25:24] [23:22] [21:20] [19:18] [17:16]
002H P1 P2 P3 P4 P5 P6 P7 P8
006H P17 P18 P19 P20 P21 P22 P23 P24
00AH P33 P34 P35 P36 P37 P38 P39 P40
…
[15:14] [13:12] [11:10] [9:8] [7:6] [5:4] [3:2] [1:0]
000H P9 P10 P11 P12 P13 P14 P15 P16
004H P25 P26 P27 P28 P29 P30 P31 P32
008H P41 P42 P43 P44 P45 P46 P47 P48
...
2.4.15 1BPP display (Palette)
(BSWP = 0, HWSWP = 0)
[31] [30] [29] [28] [27] [26] [25] [24] [23] [22] [21] [20] [19] [18] [17] [16]
002H P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16
006H P33 P34 P35 P36 P37 P38 P39 P40 P41 P42 P43 P44 P45 P46 P47 P48
…
[15] [14] [13] [12] [11] [10] [9] [8] [7] [6] [5] [4] [3] [2] [1] [0]
000H P17 P18 P19 P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 P30 P31 P32
004H P49 P50 P51 P52 P53 P54 P55 P56 P57 P58 P59 P60 P61 P62 P63 P64
…
NOTE: The values of frame buffer are index of palette memory.
The MSB value of Palette memory is AEN bit.
AEN : Select Alpha value in Window 1 Alpha Value Register for alpha blending
AEN = 0 : ALPHA0_R/G/B values are applied.
AEN = 1 : ALPHA1_R/G/B values are applied.
Each pixel of LCD panel displays blended color with lower layer window.
Refer to the equation of alpha blending on page 22-22.
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-18
2.5 VD SIGNAL CONNECTION
2.5.1 VD Pin Descriptions at 24BPP RGB parallel
VD 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9876 5 4 3 2 1 0
RED 7 6 5 4 3 2 1 0
GREEN 76543210
BLUE 76 5 4 3 210
2.5.2 VD Pin Descriptions at 18BPP RGB parallel
VD 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9876 5 4 3 2 1 0
RED 5 4 3 2 1 0
GREEN 543210
BLUE
NC
NC
5 4 3 2 1 0
NC
2.5.3 VD Pin Descriptions at 16BPP RGB parallel
(5:6:5)
VD 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9876 5 4 3 2 1 0
RED 4 3 2 1 0
GREEN 543210
BLUE
NC
NC
4 3 2 1 0
NC
2.5.4 VD Pin Descriptions at 24BPP RGB Serial (8+8+8)
VD 23 22 21 20 19 18 17 16 [15:0]
1st time 7 6 5 4 3 2 1 0
2nd time 7 6 5 4 3 2 1 0
3rd time 7 6 5 4 3 2 1 0
NC
2.5.5 VD Pin Descriptions at 18BPP RGB Serial (6+6+6)
VD 23 22 21 20 19 18 [17:0]
1st time 5 4 3 2 1 0
2nd time 5 4 3 2 1 0
3rd time 5 4 3 2 1 0
NC
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-19
2.5.6 VD Pin Descriptions at 18BPP i80-System Interface
VD 23 22 21 20 19 18 17 16 15 14 13 12 11 10 987 6 5 4 3210
RED 5 4 3 2 1 0
GREEN 5 4 3 2 1 0
BLUE
NC
5 4 3210
2.5.7 VD Pin Descriptions at 16BPP i80-System Interface
VD 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3210
RED 4 3 2 1 0
GREEN 5 4 3 2 1 0
BLUE
NC
4 3 2 1 0
NC
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-20
2.6 PALETTE USAGE
2.6.1 Palette Configuration and Format Control
The LCD controller can support the 256 colors palette for various selection of color mapping.
The user can select 256 colors from the 24-bit colors through these four formats.
256 colors palette consist of the 256(depth) × 25-bit DPSRAM. Palette supports 8:8:8, 6:6:6, 5:6:5(R:G:B), and etc
format.
For example of A:5:5:5 format, write palette like Table 22-3 and then connect VD pin to LCD
panel( R(5)=VD[23:19], G(5)=VD[15:11], and B(5)=VD[7:3] ). Select Alpha value in Window 1 Alpha Value
Register. At the last, Set Window Palette Control(W0PAL, case window0) register to 0’b101.
Table 22-1. 25BPP(A:8:8:8) Palette Data Format
INDEX\
Bit Pos.
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
00H AEN R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0
01H AEN R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0
....... … … … … … … … … … ………………………… … … … ………
FFH AEN R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0
Number
of VD
- 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-21
Table 22-2. 19BPP (A:6:6:6) Palette Data Format
INDEX\Bit
Pos.
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
00H - - - - -
AEN R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0
01H - - - - -
AEN R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0
....... - - - - - … … … … … … … … … … … … … … … … … … …
FFH - - - - -
AEN R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0
Number of
VD
- - - - - - 23 22 21 20 19 18 15 14 13 12 15 14 7 6 5 4 3 2
Table 22-3. 16BPP(A:5:5:5) Palette Data Format
INDEX\Bit
Pos.
24 23 22 21 2019 18 17 16151413121110987 6 5 4 3210
00H - - - - - - - - AEN R4 R3 R2 R1 R0 G4 G3 G2 G1 G0 B4 B3 B2 B1 B0
01H - - - - - - - - AEN R4 R3 R2 R1 R0 G4 G3 G2 G1 G0 B4 B3 B2 B1 B0
....... - - - - - - - - … …………………… … … … …………
FFH - - - - - - - - AEN R4 R3 R2 R1 R0 G4 G3 G2 G1 G0 B4 B3 B2 B1 B0
Number
of VD
- - - - - - - - - 23 22 21 20 19 15 14 13 12 11 7 6 5 4 3
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-22
3 WINDOW BLENDING
3.1 OVERVIEW
The main function of the VPRCS module is window blending. LCD controller has 2-window layers and the detail is
described below. As an example of application, System can use win0 as an OS window, full TV screen window or
etc. This feature enhances the system performance by reducing the data rate of total system.
3.1.1 Total 2 windows
Window 0 (base) : RGB with palette
Window 1 (overlay) : RGB with palette
3.1.2 Overlay Priority
Win 1 > Win 0
3.1.3 Blending equation
WinOut(R) = Win0(R) x (1-AR) + Win1(R) x AR
WinOut(G) = Win0(G) x (1-AG) + Win1(G) x AG
WinOut(B) = Win0(B) x (1-AB) + Win1(B) x AB
Where,
AR = Win1’s Red blending factor(ALPHA0_R/16 or ALPHA1_R/16 or DATA[27:24]/16, AR range is 0~1)
AG = Win1’s Green blending factor(ALPHA0_G/16 or ALPHA1_G/16 or DATA[27:24]/16, AG range is 0~1)
AB = Win1’s Blue blending factor(ALPHA0_B/16 or ALPHA1_B/16 or DATA[27:24]/16, AB range is 0~1)
Figure 22-5. Blending Operations
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-23
3.2 BLENDING DIAGRAM/DETAILS
LCD controller could blend 2-Layer for the only one pixel at the same time. The Blending factor, alpha value is
controlled by ALPHA0_R/G/B and ALPHA1_R/G/B fields in Window 1 Alpha Value register or DATA[27:24] in
frame buffer, which are implemented for each window layer and color(R,G,B). As a special feature, between two
windows have two kinds of alpha blending value. One is ALPHA0_R/G/B(AEN=0) and the other is
ALPHA1_R/G/B(AEN=1).
Table 22-4. Alpha Value Selection Table for Blending
ALPHA_SEL = 0
@WINCON1[1] ALPHA0_R/G/B
BLD_PIX = 0
(WINCON1[6]) ALPHA_SEL = 1
@WINCON1[1] ALPHA1_R/G/B
AEN = 0 ALPHA0_R/G/B
KEYBLEND = 0
@W1KEYCON0[26] AEN = 1 ALPHA1_R/G/B
Non-Key area ALPHA0_R/G/B
ALPHA_SEL = 0
@WINCON1[1] KEYBLEND = 1
@W1KEYCON0[26] Key area ALPHA1_R/G/B
BLD_PIX = 1
@WINCON1[6]
ALPHA_SEL = 1
@WINCON1[1] DATA[27:24] in frame buffer for 28bpp mode
3.2.1 COLOR-KEY FUNCTION
The LCD controller can support color-key function for the various effect of image mapping. Color image of OSD
layer, which is specified by COLOR-KEY register, will be substituted by background image for special
functionality, as cursor image or pre-view image of the camera.
The register value to ColorKey reg must be set in 24bit RGB format.
DIRCON (in Win1 Color Key 0 register) bit selects the window to be compared with COLVAL (in Win1 Color Key 1
Register). If this bit is set to ‘0’, the comparison window is window1 (foreground window).
COMPKEY (in Win1 Color Key 0 register) value decides whether to compare COLVAL and selected window color.
In other words, the comparator only compares COLVAL and selected window color bits where the corresponding
bit in COMPKEY is ‘0’.
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-24
Window0
(Background)
Window1
(Foreground)
DIRCON
Selected
Window
Mask bit of COLVAL to
compare with Window color
Match with COLVAL :
Unselected window
Unmatched with CONVAL :
Selected window
COMPKEY
Frame Buffer
R’G’B’
COLVAL
Compare
Figure 22-6. Color Key Block Diagram
Window0
(Green)
Window1
(Red)
Window0
(Green) Key
area
Non-Key
area
COLVAL
(0Xff0000)
Key area: Match with COLVAL area
Non-Key area: Unmatched with COLVAL area
Window1
(Blue)
Window1
(Blue)
Figure 22-7. Color Key Operations
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-25
No Blend and
Color Key Enable
Blended (Alpha = 0x0)
OSD Image 180x100
Back-Ground 320x240
Blended (Alpha = 0xf)
and No Color key Blended (Alpha = 0x9)
and No Color key
Blended (Alpha = 0x9)
and Color Key Enable
Figure 22-8. Color Key Function Configurations
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-26
4 VTIME CONTROLLER OPERATION
4.1 RGB INTERFACE
The VTIME generates the control signals such as, RGB_VSYNC, RGB_HSYNC, RGB_VDEN and RGB_VCLK
signal for RGB interface. These control signals are highly related with the configuration on the VIDTCON0/1/2
registers in the VSFR register. Base on these programmable configurations of the display control registers in
VSFR, the VTIME module can generate the programmable control signals suitable for the support of many
different types of display device.
The RGB_VSYNC signal is asserted to cause the LCD's line pointer to start over at the top of the display. The
RGB_VSYNC and RGB_HSYNC pulse generation is controlled by the configuration of both the HOZVAL field and
the LINEVAL registers. The HOZVAL and LINEVAL can be determined by the size of the LCD panel according to
the following equations:
HOZVAL = (Horizontal display size) -1
LINEVAL = (Vertical display size) –1
The rate of RGB_VCLK signal can be controlled by the CLKVAL field in the VIDCON0 register. The table below
defines the relationship of RGB_VCLK and CLKVAL. The minimum value of CLKVAL is 1.
RGB_VCLK (Hz) =HCLK/ [CLKVAL+1]
Table 22-5. Relation between VCLK and CLKVAL (Freq. of Video Clock Source=60MHz)
CLKVAL 60MHz/X VCLK
1 60 MHz/2 30.0 MHz
2 60 MHz/3 15.0 MHz
: : :
63 60 MHz/64 938 kHz
The RGB_HSYNC and RGB_VSYNC signal is configured by RGB_VSYNC, VBPD, VFPD, HSYNC, HBPD,
HFPD, HOZVAL and LINEVAL. Refer the Figure 22-10.
The frame rate is RGB_VSYNC signal frequency. The frame rate is related with the field of RGB_VSYNC, VBPD,
VFPD, LINEVAL, HSYNC, HBPD, HFPD, HOZVAL, CLKVAL registers. Most LCD drivers need their own
adequate frame rate. The frame rate is calculated as follows;
Frame Rate = 1/ [ { (VSPW+1) + (VBPD+1) + (LIINEVAL + 1) + (VFPD+1) } x {(HSPW+1) + (HBPD +1)
+ (HFPD+1) + (HOZVAL + 1) } x { (CLKVAL+1 ) / ( Frequency of Clock source ) } ]
4.2 i80-SYSTEM INTERFACE
The VTIME generates the control signals such as, SYS_CS0, SYS_CS1, SYS_RS and SYS_WE signal for i80-
System Interface. The LCDIFMODE, LCD_CS_SETUP, LCD_WAIT_WR and LCD_HOLD_WR registers control
these signals. Refer to figure 22-11.
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-27
5 VIRTUAL DISPLAY
The LCD controller supports the hardware horizontal or vertical scrolling. If the screen is scrolled, the fields of
LCDBASEU and LCDBASEL registers need to be changed (refer to Figure 22-9), but PAGEWIDTH and OFFSIZE
value do not change. The size of video buffer in which the image is stored should be larger than the LCD panel
screen size.
This is the data of line 1 of virtual screen. This is the data of line 1 of virtual screen.
This is the data of line 2 of virtual screen. This is the data of line 2 of virtual screen.
This is the data of line 3 of virtual screen. This is the data of line 3 of virtual screen.
This is the data of line 4 of virtual screen. This is the data of line 4 of virtual screen.
This is the data of line 5 of virtual screen. This is the data of line 5 of virtual screen.
This is the data of line 6 of virtual screen. This is the data of line 6 of virtual screen.
This is the data of line 7 of virtual screen. This is the data of line 7 of virtual screen.
This is the data of line 8 of virtual screen. This is the data of line 8 of virtual screen.
This is the data of line 9 of virtual screen. This is the data of line 9 of virtual screen.
This is the data of line 10 of virtual screen. This is the data of line 10 of virtual screen.
This is the data of line 11 of virtual screen. This is the data of line 11 of virtual screen.
Before Scrolling
View Port
(The same size
of LCD panel)
LINEVAL + 1
OFFSIZEPAGEWIDTH
This is the data of line 1 of virtual screen. This is the data of line 1 of virtual screen.
This is the data of line 2 of virtual screen. This is the data of line 2 of virtual screen.
This is the data of line 3 of virtual screen. This is the data of line 3 of virtual screen.
This is the data of line 4 of virtual screen. This is the data of line 4 of virtual screen.
This is the data of line 5 of virtual screen. This is the data of line 5 of virtual screen.
This is the data of line 6 of virtual screen. This is the data of line 6 of virtual screen.
This is the data of line 7 of virtual screen. This is the data of line 7 of virtual screen.
This is the data of line 8 of virtual screen. This is the data of line 8 of virtual screen.
This is the data of line 9 of virtual screen. This is the data of line 9 of virtual screen.
This is the data of line 10 of virtual screen. This is the data of line 10 of virtual screen.
This is the data of line 11 of virtual screen. This is the data of line 11 of virtual screen.
After Scrolling
LCDBASEU
LCDBASEL
OFFSIZE
Figure 22-9. Example of Scrolling in Virtual Display
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-28
6 RGB INTERFACE I/O
6.1.1 Signals
Name Type Description
RGB_HSYNC Output Horizontal Sync. Signal
RGB_VSYNC Output Vertical Sync. Signal
RGB_VCLK Output LCD Video Clock
RGB_VDEN Output Data Enable
RGB_VD[23:0] Output RGB data output
6.1.2 RGB I/F Timing
VSPW+1 VBPD+1 LINEVAL+1 VFPD+1
1 FRAME
INT_FrSyn
(internal)
RGB_VSYNC
RGB_HSYNC
RGB_VDEN
~
~~
~~
~~
~
~
~~
~
1 LINE
~
~~
~
HSPW+1 HBPD+1 HOZVAL+1 HFPD+1
RGB_HSYNC
RGB_VCLK
RGB_VD
RGB_VDEN
VSPW=0, VBPD=0, VFPD=0, HSPW=1, HBPD=1, HFPD=1
Figure 22-10. LCD RGB Interface Timing
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-29
7 LCD CPU INTERFACE I/O (i80-SYSTEM I/F)
7.1.1 Signals
Name Type Description
SYS_VD[17:0] InOut Video Data
SYS_CS0 Output Chip select for Main LCD
SYS_CS1 Output Chip select for Sub LCD
SYS_WR Output Write enable
SYS_OE Output Output enable
SYS_RS Output Register/State select
7.1.2 CPU (i80-System) I/F Timing
Figure 22-11. Write Cycle Timing
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-30
7.1.3 LCD signal Muxing
Table 22-6. LCD Signal Muxing Table (RGB and i-80 I/F)
PAD VIDOUT Signals
10/11 SYS_WR
01 Reserved
RGB_VCLK/SYS_WR
00 RGB_VCLK
10/11 SYS_CS0
01 Reserved
RGB_HSYNC/SYS_CS0
00 RGB_HSYNC
10/11 SYS_CS1
01 Reserved
RGB_VSYNC/SYS_CS1
00 RGB_VSYNC
10/11 SYS_RS
01 Reserved
RGB_VDEN/SYS_RS
00 RGB_VDEN
10/11 SYS_OE
01 Reserved
RGB_LEND/SYS_OE
00 RGB_LEND
10/11 SYS_VD
01 Reserved
RGB_VD/SYS_VD
00 RGB_VD
• VIDOUT values are defined in VIDCON0[23:22]
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-31
8 PROGRAMMER’S MODEL
8.1 OVERVIEW
The following registers are used to configure LCD controller
1. VIDCON0: Configure Video output format and display enable/disable.
2. VIDCON1: RGB I/F control signal.
3. SYSIFCONx: i80-System I/F control signal.
4. VIDTCONx: Configure Video output Timing and determine the size of display.
5. WINCONx: Each window format setting
6. VIDOSDxA, VIDOSDxB: Window position setting
7. VIDOSDxC: Alpha value setting
8. VIDWxxADDx: Source image address setting
9. WxKEYCONx: Color key value register
10. WINxMAP: Window color control
11. WPALCON: Palette control register
12. WxPDATAxx: Window Palette Data of the each Index
8.1.1 Register Descriptions
Register Address R/W Description Reset Value
VIDCON0 0x4C800000 R/W Video control 0 register 0x0000_0000
VIDCON1 0x4C800004 R/W Video control 1 register 0x0000_0000
VIDTCON0 0x4C800008 R/W Video time control 0 register 0x0000_0000
VIDTCON1 0x4C80000C R/W Video time control 1 register 0x0000_0000
VIDTCON2 0x4C800010 R/W Video time control 2 register 0x0000_0000
WINCON0 0x4C800014 R/W Window control 0 register 0x0000_0000
WINCON1 0x4C800018 R/W Window control 1 register 0x0000_0000
VIDOSD0A 0x4C800028 R/W Video Window 0’s position control register 0x0000_0000
VIDOSD0B 0x4C80002C R/W Video Window 0’s position control register 0x0000_0000
VIDOSD1A 0x4C800034 R/W Video Window 1’s position control register 0x0000_0000
VIDOSD1B 0x4C800038 R/W Video Window 1’s position control register 0x0000_0000
VIDOSD1C 0x4C80003C R/W Video Window 1’s alpha value register 0x0000_0000
VIDW00ADD0B0 0x4C800064 R/W Window 0’s buffer start address register, buffer 0 0x0000_0000
VIDW00ADD0B1 0x4C800068 R/W Window 0’s buffer start address register, buffer 1 0x0000_0000
VIDW01ADD0 0x4C80006C R/W Window 1’s buffer start address register 0x0000_0000
VIDW00ADD1B0 0x4C80007C R/W Window 0’s buffer end address register, buffer 0 0x0000_0000
VIDW00ADD1B1 0x4C800080 R/W Window 0’s buffer end address register, buffer 1 0x0000_0000
VIDW01ADD1 0x4C800084 R/W Window 1’s buffer end address register 0x0000_0000
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
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Register Address R/W Description Reset Value
VIDW00ADD2B0 0x4C800094 R/W Window 0’s buffer size register, buffer 0 0x0000_0000
VIDW00ADD2B1 0x4C800098 R/W Window 0’s buffer size register, buffer 1 0x0000_0000
VIDW01ADD2 0x4C80009C R/W Window 1’s buffer size register 0x0000_0000
VIDINTCON 0x4C8000AC R/W Indicate the Video interrupt control register 0x03F0_0000
W1KEYCON0 0x4C8000B0 R/W Color key control register 0x0000_0000
W1KEYCON1 0x4C8000B4 R/W Color key value (transparent value) register 0x0000_0000
W2KEYCON0 0x4C8000B8 R/W Color key control register 0x0000_0000
W2KEYCON1 0x4C8000BC R/W Color key value (transparent value) register 0x0000_0000
W3KEYCON0 0x4C8000C0 R/W Color key control register 0x0000_0000
W3KEYCON1 0x4C8000C4 R/W Color key value (transparent value) register 0x0000_0000
W4KEYCON0 0x4C8000C8 R/W Color key control register 0x0000_0000
W4KEYCON1 0x4C8000CC R/W Color key value (transparent value) register 0x0000_0000
WIN0MAP 0x4C8000D0 R/W Window color control 0x0000_0000
WIN1MAP 0x4C8000D4 R/W Window color control 0x0000_0000
WPALCON 0x4C8000E4 R/W Window Palette control register 0x0000_0000
SYSIFCON0 0x4C800130 R/W i80-System Interface control for Main LDI 0x0000_0000
SYSIFCON1 0x4C800134 R/W i80-System Interface control for Sub LDI 0x0000_0000
DITHMODE 0x4C800138 R/W Dithering mode register 0x0000_0000
SIFCCON0 0x4C80013C R/W i80-System Interface command control 0x0000_0000
SIFCCON1 0x4C800140 R/W i80-System Interface command data write control 0x0000_0000
SIFCCON2 0x4C800144 R i80-System Interface command data read control 0x0000_0000
CPUTRIGCON2 0x4C800160 R/W Software-Base trigger control register 0x0000_0000
WIN0 Palette
RAM 0x4C800400~
0x4C8007FC R/W Window0 palette entry0 ~ 255 address Undefined
WIN1 Palette
RAM 0x4C800800~
0x4C800BFC R/W Window1 palette entry0 ~ 255 address Undefined
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
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8.1.2 Video Main Control 0 Register
Register Address R/W Description Reset Value
VIDCON0 0x4C800000 R/W Video control 1 register 0x0000_0000
VIDCON0 Bit Description Initial State
Reserved [31:24] Reserved 0x00
VIDOUT [23:22] It determines the output format of LCD Controller
00 = RGB I/F
01 = Reserved
10 = i80-System I/F for Main LDI
11 = i80-System I/F for Sub LDI
0
L1_DATA16 [21:19] Select the mode of output data format of i80-System I/F (Sub LDI.)
(Only when, VIDOUT == 2’b11)
000 = 16-bit mode (16 bpp)
001 = 16 + 2 bit mode (18 bpp)
010 = 9 + 9 bit mode (18 bpp)
011 = 16 + 8 bit mode (24 bpp)
100 = 18-bit mode (18bpp)
000
L0_DATA16 [18:16] Select the mode of output data format of i80-System I/F (Main LDI.)
(Only when, VIDOUT == 2’b10)
000 = 16 bit mode (16 bpp)
001 = 16 + 2 bit mode (18 bpp)
010 = 9 + 9 bit mode (18 bpp)
011 = 16 + 8 bit mode (24 bpp)
100 = 18 bit mode (18bpp)
000
Reserved [15] Reserved 0
PNRMODE [14:13] Select the display mode. (Where, VIDOUT == 2’b00)
00 = RGB Parallel format (RGB)
01 = RGB Parallel format (BGR)
10 = Serial Format (R->G->B)
11 = Serial Format (B->G->R)
Select the display mode. (Where, VIDOUT == 2’b1x)
00 = RGB Parallel format (RGB)
00
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
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8.1.3 Video Main Control 0 Register (Continued)
VIDCON0 Bit Description Initial State
CLKVALUP [12] Select CLKVAL_F Update timing control
0 = Always
1 = Start of a frame (Only once per frame)
0
CLKVAL_F [11:6] Determine the rates of VCLK.
VCLK = (HCLK or LCD video Clock) / [CLKVAL+1] ( CLKVAL ≥ 1 )
0
VCLKEN [5] VCLK Enable Control
0 = Disable
1 = Enable
0
CLKDIR [4] Select the clock source as direct or divide using CLKVAL_F register.
0 = Direct clock (frequency of VCLK = frequency of Clock source)
1 = Divided using CLKVAL_F
0
CLKSEL_F [3:2] Select the Video Clock source
00 = HCLK
01 = LCD video Clock (from SYSCON EPLL)
10 = Reserved
11 = Reserved
0
ENVID [1:0] Video output and the LCD logics enable/disable control.
00 = Disable video signals and logics immediately.
01 = Reserved.
10 = Disable video signals and logics at the end of current frame.
11 = Enable video output and logics.
Note : If set to ‘10b’ in the middle of displaying current frame, the value of
ENVID is still ‘11b’. However, the LCD functions are disabled at the end of
current frame and the value is changed to ‘10b’.
0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
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8.1.4 Video Main Control 1 Register
Register Address R/W Description Reset Value
VIDCON1 0x4C800004 R/W Video control 2 register 0x0000_0000
VIDCON1 Bit Description Initial state
LINECNT
(read only) [26:16] Provide the status of the line counter (read only)
Up count from 0 to LINEVAL 0
Reserved [15] Reserved 0
VSTATUS [14:13] Vertical Status (read only).
00 = VSYNC 01 = BACK Porch
10 = ACTIVE 11 = FRONT Porch
0
HSTATUS [12:11] Horizontal Status (read only).
00 = HSYNC 01 = BACK Porch
10 = ACTIVE 11 = FRONT Porch
0
Reserved [10:8] Reserved
IVCLK [7] This bit controls the polarity of the VCLK active edge.
0 = The video data is fetched at VCLK falling edge
1 = The video data is fetched at VCLK rising edge
0
IHSYNC [6] This bit indicates the HSYNC pulse polarity.
0 = normal(active high) 1 = inverted(active low) 0
IVSYNC [5] This bit indicates the VSYNC pulse polarity.
0 = normal(active high) 1 = inverted(active low) 0
IVDEN [4] This bit indicates the VDEN signal polarity.
0 = normal(active high) 1 = inverted(active low) 0
Reserved [3:0] Reserved 0x0
8.1.5 VIDEO Time Control 0 Register
Register Address R/W Description Reset Value
VIDTCON0 0x4C800008 R/W Video time control 1 register 0x0000_0000
VIDTCON0 Bit Description Initial State
VBPD [23:16] Vertical back porch is the number of inactive lines at the start of a
frame, after vertical synchronization period. (Period : VBPD +1) 0x00
VFPD [15:8] Vertical front porch is the number of inactive lines at the end of a
frame, before vertical synchronization period. (Period : VFPD +1) 0x00
VSPW [7:0] Vertical sync pulse width determines the VSYNC pulse's level
width by counting the number of inactive lines.
(Period : VSPW +1)
0x00
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
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8.1.6 Video Time Control 1 Register
Register Address R/W Description Reset Value
VIDTCON1 0x4C80000C R/W Video time control 2 register 0x0000_0000
VIDTCON1 Bit Description Initial state
HBPD [23:16] Horizontal back porch is the number of VCLK periods between
the edge of HSYNC and the start of active data.
(Period : HBPD +1)
Note: Set 0x10 for i80-System Interface
When the PNRMODE (VIDCON0 [14:13]) is set to serial format the
period becomes 3 times of HBPD value.
(If HBPD is set to ‘0’ in serial mode, the period becomes 3-VLCK)
0000000
HFPD [15:8] Horizontal front porch is the number of VCLK periods between the
end of active data and the edge of next HSYNC.
(Period : HFPD +1)
Note: When the PNRMODE(VIDCON0[14:13]) is set to serial format the
period of HFPD becomes 3 times of VCLK
(If HFPD is set to ‘0’ in serial mode, the period becomes 3-VLCK)
0x00
HSPW [7:0] Horizontal sync pulse width determines the HSYNC pulse's level
width by counting the number of the VCLK.
(Period : HSPW +1)
Note: When the PNRMODE(VIDCON0[14:13]) is set to serial format the
period of HSPW becomes 3 times of VCLK
(If HSPW is set to ‘0’ in serial mode, the period becomes 3-VLCK)
0x00
8.1.7 VIDEO Time Control 2 Register
Register Address R/W Description Reset Value
VIDTCON2 0x4C800010 R/W Video time control 3 register 0x0000_0000
VIDTCON2 Bit Description Initial state
LINEVAL [21:11] These bits determine the vertical size of display 0
HOZVAL [10:0] These bits determine the horizontal size of display 0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
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8.1.8 Window 0 Control Register
Register Address R/W Description Reset Value
WINCON0 0x4C800014 R/W Window 0 control register 0x0000_0000
WINCON0 Bit Description Initial State
BUFSTATUS [24]
Status of Current display Buffer (Read only)
0 = buffer0 display 1 = buffer1 display
Note: RGB I/F does not support auto-change mode.
Only i80-Sytem I/F supports auto-change mode.
0
BUFSEL [23] Select Buffer selection control
0 = buffer0 select 1 = buffer1 select 0
BUFAUTOEN [22] Double Buffer Auto-change control bit
0 = Fixed by BUFSEL
1 = Auto changed by SWTRIG (in CPUTRIGCON2 register)
Note: RGB I/F does not support auto-change mode.
Only i80-Sytem I/F supports auto-change mode.
0
BITSWP [18] Bit swap control bit.
0 = Swap Disable 1 = Swap Enable 0
BYTSWP [17] Byte swaps control bit.
0 = Swap Disable 1 = Swap Enable 0
HAWSWP [16] Half-Word swap control bit.
0 = Swap Disable 1 = Swap Enable 0
Reserved [15:11] Reserved 0
BURSTLEN [10:9] DMA’s Burst Length selection:
00 = 16 word– burst 01 = 8 word– burst
10 = 4 word– burst 11 = Reserved
0
Reserved [8:6] Reserved 0
BPPMODE_F [5:2] Select the BPP (Bits Per Pixel) mode Window image.
0000 = 1bpp ( palletized )
0001 = 2bpp ( palletized )
0010 = 4bpp ( palletized )
0011 = 8bpp ( palletized )
0100 = Reserved
0101 = 16bpp (non-palletized, R: 5-G:6-B:5 )
0110 = Reserved
0111 = 16 bpp (non-palletized, I :1-R:5-G:5-B:5 )
1000 = Unpacked 18bpp (non-palletized, R:6-G:6-B:6 )
1001 = Reserved
1010 = Reserved
1011 = Unpacked 24bpp ( non-palletized R:8-G:8-B:8 )
11xx = Reserved
0
Reserved [1] Reserved 0
ENWIN_F [0] Window0 on/ off control
0 = Off window0.
1 = On window0.
0
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
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8.1.9 Window 1 Control Register
Register Address R/W Description Reset Value
WINCON1 0x4C800018 R/W Window control 1 register 0x0000_0000
WINCON1 Bit Description Initial State
BITSWP [18]
Bit swap control
0 = Swap Disable 1 = Swap Enable 0
BYTSWP [17]
Byte swaps control
0 = Swap Disable 1 = Swap Enable 0
HAWSWP [16]
Half-Word swap control
0 = Swap Disable 1 = Swap Enable 0
− [15:11] Reserved 0
BURSTLEN [10:9] DMA’s Burst Length selection :
00 = 16 word– burst 01 = 8 word– burst
10 = 4 word– burst 11 = Reserved
0
Reserved [8:7] Reserved 0
BLD_PIX [6] Select blending category
0 = Per plane blending 1 = Per pixel blending
0
BPPMODE_F [5:2]
Select the BPP (Bits Per Pixel) mode Window image.
0000 = 1bpp ( palletized )
0001 = 2bpp ( palletized )
0010 = 4bpp ( palletized )
0011 = 8bpp ( palletized )
0100 = 8bpp ( non-palletized, A: 1-R:2-G:3-B:2 )
0101 = 16bpp ( non-palletized, R:5-G:6-B:5 )
0110 = 16bpp ( non-palletized, A:1-R:5-G:5-B:5 )
0111 = 16bpp ( non-palletized, I :1-R:5-G:5-B:5 )
1000 = Unpacked 18bpp ( non-palletized, R:6-G:6-B:6 )
1001 = Unpacked 18bpp ( non-palletized, A:1-R:6-G:6-B:5 )
1010 = Unpacked 19bpp ( non-palletized, A:1-R:6-G:6-B:6 )
1011 = Unpacked 24bpp ( non-palletized, R:8-G:8-B:8 )
1100 = Unpacked 24bpp ( non-palletized, A:1-R:8-G:8-B:7 )
1101 = Unpacked 25bpp ( non-palletized, A:1-R:8-G:8-B:8 ) or
Unpacked 28bpp ( non-palletized, A:4-R:8-G:8-B:8 )
111x = Reserved
Note: 1101 = support 28bpp (non-palletized A:4-R:8-G:8-B:8 ) for per pixel
blending.
0
ALPHA_SEL [1]
Alpha value selection
Per plane blending case( BLD_PIX ==0)
0 = using ALPHA0_R/G/B values
1 = using ALPHA1_R/G/B values
0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
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WINCON1 Bit Description Initial State
Per pixel blending case( BLD_PIX ==1)
0 = selected by AEN bit in frame buffer for each pixel or Key area
AEN = 0 ALPHA0_R/G/B
0 AEN = 1 ALPHA1_R/G/B
Non-Key area ALPHA0_R/G/B
KEYBLEND
(W1KEYCON0[26]) 1 Key area ALPHA1_R/G/B
1 = using DATA[27:24] in frame buffer, only for 28bpp mode
ENWIN_F [0] Window1 on/ off control
0 = Off window1
1 = On window1
0
8.1.10 Window 0 Position Control A Register
Register Address R/W Description Reset Value
VIDOSD0A 0x4C800028 R/W Video Window 0’s position control register 0x0000_0000
VIDOSD0A Bit Description Initial State
OSD_LeftTopX_F [21:11] Horizontal screen coordinate for left top pixel of OSD image 0
OSD_LeftTopY_F [10:0] Vertical screen coordinate for left top pixel of OSD image 0
8.1.11 Window 0 Position Control B Register
Register Address R/W Description Reset Value
VIDOSD0B 0x4C80002C R/W Video Window 0’s position control register 0x0000_0000
VIDOSD0B Bit Description Initial State
OSD_RightBotX_F [21:11] Horizontal screen coordinate for right bottom pixel of OSD
image 0
OSD_RightBotY_F [10:0] Vertical screen coordinate for right bottom pixel of OSD image 0
NOTE: Registers must have word boundary X position.
So, 24bpp mode should have X position by 1 pixel. ( ex, X = 0,1,2,3….)
16bpp mode should have X position by 2 pixel. ( ex, X = 0,2,4,6….)
8bpp mode should have X position by 4 pixel. ( ex, X = 0,4,8,12….)
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
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8.1.12 Window 1 Position Control A Register
Register Address R/W Description Reset Value
VIDOSD1A 0x4C800034 R/W Video Window 1’s position control 2 register 0x0000_0000
VIDOSD1A Bit Description initial state
OSD_LeftTopX_F [21:11] Horizontal screen coordinate for left top pixel of OSD image 0
OSD_LeftTopY_F [10:0] Vertical screen coordinate for left top pixel of OSD image 0
8.1.13 Window 1 Position Control B Register
Register Address R/W Description Reset Value
VIDOSD1B 0x4C800038 R/W Video Window 1’s position control register 0x0000_0000
VIDOSD1B Bit Description Initial state
OSD_RightBotX_F [21:11] Horizontal screen coordinate for right bottom pixel of OSD
image 0
OSD_RightBotY_F [10:0] Vertical screen coordinate for right bottom pixel of OSD image 0
NOTE: Registers must have word boundary X position.
So, 24bpp mode should have X position by 1 pixel. ( ex, X = 0,1,2,3….)
16bpp mode should have X position by 2 pixel. ( ex, X = 0,2,4,6….)
8bpp mode should have X position by 4 pixel. ( ex, X = 0,4,8,12….)
8.1.14 Window 1 Alpha Value Register
Register Address R/W Description Reset Value
VIDOSD1C 0x4C80003C R/W Video Window 1’s alpha value register 0x0000_0000
ALPHAVAL Bit Description Initial state
Reserved [31:24] Reserved 0
ALPHA0_R [23:20] Red Alpha0 value 0
ALPHA0_G [19:16] Green Alpha0 value 0
ALPHA0_B [15:12] Blue Alpha0 value 0
ALPHA1_R [11:8] Red Alpha1 value 0
ALPHA1_G [7:4] Green Alpha1 value 0
ALPHA1_B [3:0] Blue Alpha1 value 0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
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8.1.15 FRAME Buffer Address 0 Register
Register Address R/W Description Reset Value
VIDW00ADD0B0 0x4C800064 R/W
Window 0’s buffer start address register, buffer 0 0x0000_0000
VIDW00ADD0B1 0x4C800068 R/W
Window 0’s buffer start address register, buffer 1 0x0000_0000
VIDW01ADD0 0x4C80006C R/W
Window 1’s buffer start address register 0x0000_0000
VIDWxxADD0 Bit Description Initial State
VBANK_F [31:24] These bits indicate A[31:24] of the bank location for the video
buffer in the system memory. 0x0
VBASEU_F [23:0] These bits indicate A[23:0] of the start address of the Video frame
buffer. 0x0
8.1.16 FRAME Buffer Address 1 Register
Register Address R/W Description Reset Value
VIDW00ADD1B0 0x4C80007C R/W Window 0’s buffer end address register, buffer 0 0x0000_0000
VIDW00ADD1B1 0x4C800080 R/W Window 0’s buffer end address register, buffer 1 0x0000_0000
VIDW01ADD1 0x4C800084 R/W Window 1’s buffer end address register 0x0000_0000
VIDWxxADD1 Bit Description Initial State
VBASEL_F [23:0] These bits indicate A[23:0] of the end address of the Video frame
buffer.
VBASEL = VBASEU +
(PAGEWIDTH+OFFSIZE) x (LINEVAL+1)
0x0
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
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8.1.17 FRAME Buffer Address 2 Register(Virtual screen)
Register Address R/W Description Reset Value
VIDW00ADD2B0 0x4C800094 R/W Window 0’s buffer size register, buffer 0 0x0000_0000
VIDW00ADD2B1 0x4C800098 R/W Window 0’s buffer size register, buffer 1 0x0000_0000
VIDW01ADD2 0x4C80009C R/W Window 1’s buffer size register 0x0000_0000
VIDWxxADD2 Bit Description Initial State
OFFSIZE_F [25:13] Virtual screen offset size (the number of byte)
This value defines the difference between the address of the last
byte displayed on the previous Video line and the address of the
first byte to be displayed in the new Video line.
OFFSIZE_F must have value more than burst size value or 0.
0
PAGEWIDTH_F [12:0] Virtual screen page width (the number of byte)
This value defines the width of the view port in the frame.
PAGEWIDTH must have the value, which is multiple of the burst
size.
0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
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8.1.18 VIDEO Interrupt Control Register
Register Address R/W Description Reset Value
VIDINTCON 0x4C8000AC R/W Indicate the Video interrupt control register 0x3F00000
VIDINTCON Bit Description Initial state
FIFOINTERVAL [25:20] These bits control the interval of the FIFO interrupt. 0x3F
SYSMAINCON [19] Sending complete interrupt enable bit to Main LCD
0 = Interrupt Disable.
1 = Interrupt Enable.
0
SYSSUBCON [18] Sending complete interrupt enable bit to Sub LCD
0 = Interrupt Disable.
1 = Interrupt Enable.
0
SYSIFDONE [17] i80-System Interface Interrupt Enable control (only for i80-
System Interface mode).
0 = Interrupt Disable.
1 = Interrupt Enable.
0
FRAMESEL0 [16:15] Video Frame Interrupt 0 (SUBINT_LCD3) at start of :
00 = BACK Porch 01 = VSYNC
10 = ACTIVE 11 = FRONT Porch
0
FRAMESEL1 [14:13] Video Frame Interrupt 1 (SUBINT_LCD3) at start of :
00 = None 01 = BACK Porch
10 = VSYNC 11 = FRONT Porch
0
INTFRMEN [12] Video Frame interrupts (SUBINT_LCD3) Enable control bit.
0 = Video Frame Interrupt Disable
1 = Video Frame Interrupt Enable
0
FIFOSEL [11:5] FIFO Interrupt control bit, each bit has the meaning of
[11:7] Reserved
[ 6] Window 1 control ( 0: disable, 1: enable)
[ 5] Window 0 control ( 0: disable, 1: enable)
0
FIFOLEVEL [4:2] Video FIFO Interrupt (SUBINT_LCD2) Level Select
000 = 25% left 001 = 50% left
010 = 75% left 011 = empty 100 = full
0
INTFIFOEN [1] LCD FIFO interrupt (SUBINT_LCD2) Enable control bit.
0 = LCD FIFO Level Interrupt Disable
1 = LCD FIFO Level Interrupt Enable
0
INTEN [0] LCD interrupt (INT_LCD) Enable control bit.
0 = LCD Interrupt Disable
1 = LCD Interrupt Enable
0
NOTE: Frame interrupt (SUBINT_LCD3) has two interrupt sources, which are Frame interrupt0 and 1.
For example, if FRAMESEL0 is ‘00b’ and FRAMESEL1 is ‘00b’, then Frame interrupt (SUBINT_LCD3) is
asserted at the start of RGB_VSYNC. If FRAMESEL0 is ‘00b’ and FRAMESEL1 is ‘01b’, then Frame
interrupt (SUBINT_LCD3) is asserted twice at the start of RGB_VSYNC and BACK porch.
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
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8.1.19 Win1 Color Key 0 Register
Register Address R/W Description Reset Value
W1KEYCON0 0x4C8000B0 R/W Color key control register 0x0000_0000
W1KEYCON0 Bit Description Initial state
KEYBLEN [26] Alpha value control for Key area or Non-Key area
0 = Alpha value selected by AEN bit in frame buffer
1 = Alpha value selected by below area
Non-Key area : ALPHA0_R/G/B
Key area : ALPHA1_R/G/B
Note: This bit is meaningful when BLD_PIX is 1 and ALPHA_SEL is 0.
0
KEYEN_F [25] Color Key (Chroma key ) Enable control
0 = Color key disable
1 = Color key enable
0
DIRCON [24] Color key (Chroma key) direction control
0 = If the pixel value match fore-ground image with COLVAL, pixel
from back-ground image is displayed ( only in OSD area)
1 = If the pixel value match back-ground with COLVAL, pixel from
fore-ground image is displayed ( only in OSD area)
0
COMPKEY [23:0] Each bit is correspond to the COLVAL[23:0].
If some position bit is set then that position bit of COLVAL will be
disabled.
0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
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8.1.20 WIN 1 Color key 1 Register
Register Address R/W Description Reset Value
W1KEYCON1 0x4C8000B4 R/W Color key value ( transparent value) register 0x0000_0000
W1KEYCON1 Bit Description Initial state
COLVAL [23:0] Color key value for the transparent pixel effect 0
NOTE:
COLVAL and COMPKEY use 24-bit color data at all bpp mode. Unused higher bits should be ‘1b’.
@ BPP24 mode: 24-bit color value is valid.
A. COLVAL
- Red: COLVAL [23:16]
- Green: COLVAL [15: 8]
- Blue: COLVAL [7:0]
B. COMPKEY
- Red: COMPKEY [23:16]
- Green: COMPKEY [15: 8]
- Blue: COMPKEY [7:0]
@ BPP16 (5:6:5) mode: 16 bit color value is valid
A. COLVAL
- Red: COLVAL [23:19]
- Green: COLVAL [15: 10]
- Blue: COLVAL [7:3]
B. COMPKEY
- Red: COMPKEY [23: 19]
- Green: COMPKEY [15: 10]
- Blue: COMPKEY [7: 3]
- COMPKEY [18:16] must be ‘0x7’.
- COMPKEY [9: 8] must be ‘0x3’.
- COMPKEY [2:0] must be ‘0x7’.
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
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8.1.21 WIN0 Color MAP
Register Address R/W Description Reset Value
WIN0MAP 0x4C8000D0 R/W Window color control 0x0000_0000
WIN0MAP Bit Description Initial state
MAPCOLEN_F [24] Window’s color mapping control bit.
If this bit is enabled then Video DMA will stop, and MAPCOLOR
will be appear on back-ground image instead of original image.
0 = disable
1 = enable
0
MAPCOLOR [23:0] Color Value 0
8.1.22 WIN1 Color MAP
Register Address R/W Description Reset Value
WIN1MAP 0x4C8000D4 R/W Window color control 0x0000_0000
WIN1MAP Bit Description Initial state
MAPCOLEN_F [24] Window’s color mapping control bit.
If this bit is enabled then Video DMA will stop, and MAPCOLOR
will be appear on background image instead of original image.
0 = disable
1 = enable
0
MAPCOLOR [23:0] Color Value 0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
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8.1.23 Window Palette control Register
Register Address R/W Description Reset Value
WPALCON 0x4C8000E4 R/W Window Palette control register 0x0000_0000
WPALCON Bit Description Initial state
PALUPDATEEN [9] Palette memory access-right control bit.
Users should set this bit before access (write or read) palette
memory, in this case LCD controller cannot access palette. After
update, users should clear this bit for operation of palletized LCD.
0: Normal Mode (LCD controller access)
1: Enable (ARM access)
0
W1PAL [5:3] This bit determines the size of the palette data format of Window 1
000 = 25-bit ( A:8:8:8 )
001 = 24-bit ( 8:8:8 )
010 = 19-bit ( A:6:6:6 )
011 = 18-bit ( A:6:6:5 )
100 = 18-bit ( 6:6:6 )
101 = 16-bit ( A:5:5:5 )
110 = 16-bit ( 5:6:5 )
0
W0PAL [2:0] This bit determines the size of the palette data format of Window 0
000 = 25-bit ( A:8:8:8 )
001 = 24-bit ( 8:8:8 )
010 = 19-bit ( A:6:6:6 )
011 = 18-bit ( A:6:6:5 )
100 = 18-bit ( 6:6:6 )
101 = 16-bit ( A:5:5:5 )
110 = 16-bit ( 5:6:5 )
0
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-48
8.1.24 Main LCD i80-System Interface control
Register Address R/W Description Reset Value
SYSIFCON0 0x4C800130 R/W i80-System Interface control for Main LDI(LCD) 0x0000_0000
SYSIFCON1 0x4C800134 R/W i80-System Interface control for Sub LDI(LCD) 0x0000_0000
SYSIFCONx Bit Description Initial State
Reserved [23:20] Reserved 0
LCD_CS_SETUP [19:16] Numbers of clock cycles for the active period of the address
signal enable to the chip select enable. 0
LCD_WR _SETUP [15:12] Numbers of clock cycles for the active period of the CS
signal enable to the write signal enable. 0
LCD_WR_ACT [11:8] Numbers of clock cycles for the active period of the chip
select enable. 0
LCD_WR _HOLD [7:4] Numbers of clock cycles for the active period of the chip
select disable to the write signal disable. 0
Reserved [3] Reserved 0
RSPOL [2] The polarity of the RS Signal
0 = Low
1 = High
* Set to 1 for normal access.
0
SUCCEUP [1] 1 = triggered mode(Should be 1) 0
SYSIFEN [0] LCD i80-System Interface control
0 = Disable
1 = Enable
0
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-49
8.1.25 Dithering Control 1 Register
Register Address R/W Description Reset Value
DITHMODE 0x4C800138 R/W Dithering mode register 0x0000_0000
DITHMODE Bit Description Initial state
Reserved [30:7] Not used for normal access (Write not-zero values to these
register make to come out abnormal result ) 0
RDithPos [6:5] Red Dither bit control
00 = 5-bit
01 = 6-bit
10 = 8-bit
0
GDithPos [4:3] Green Dither bit control
00 = 5-bit
01 = 6-bit
10 = 8-bit
0
BDithPos [2:1] Blue Dither bit control
00 = 5-bit
01 = 6-bit
10 = 8-bit
0
DITHEN_F [0] Dithering Enable bit
0 = dithering disable
1 = dithering enable
0
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-50
8.1.26 i80-System Interface Command Control 0
Register Address R/W Description Reset Value
SIFCCON0 0x4C80013C R/W i80-System Interface Command Control 0x0000_0000
SIFCCON0 Bit Description Initial State
Reserved [11:10] Reserved 0
SYS_CS0_CON [9] LCD i80-System Interface SYS_CS0 (main) Signal control
0 = Disable (High)
1 = Enable (Low)
0
SYS_CS1_CON [8] LCD i80-System Interface SYS_CS1 (sub) Signal control
0 = Disable (High)
1 = Enable (Low)
0
SYS_OE_CON [7] LCD i80-System Interface SYS_OE Signal control
0 = Disable (High)
1 = Enable (Low)
0
SYS_WR_CON [6] LCD i80-System Interface SYS_WR Signal control
0 = Disable (High)
1 = Enable (Low)
0
Reserved [5:2] Reserved (Should be set be “0”) 0
SYS_RS_CON [1] LCD i80-System Interface SYS_RS Signal control
0 = Low
1 = High
0
SCOMEN [0] LCD i80-System Interface Command Mode Enable
0 = Disable
1 = Enable
S3C2450X RISC MICROPROCESSOR LCD CONTROLLER
22-51
8.1.27 i80-System Interface Command Control 1
Register Address R/W Description Reset Value
SIFCCON1 0x4C800140 R/W i80-System Interface Command Data Write register 0x0000_0000
SIFCCON1 Bit Description Initial State
Reserved [23:18] Reserved 0
SYS_WDATA [17:0] LCD i80-System Interface Write Data 0
8.1.28 i80-System Interface Command Control 2
Register Address R Description Reset Value
SIFCCON2 0x4C800144 R i80-System Interface Command Data Read register 0x0000_0000
SIFCCON2 Bit Description Initial State
Reserved [23:18] Reserved 0
SYS_RDATA [17:0] LCD i80-System Interface Read Data 0
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-52
8.1.29 i80-System I/F TRIGGER CONTROL 2 Register
Register Address R/W Description Reset Value
CPUTRIGCON2 0x4C800160 R/W Software-Based Trigger control register 0x0000_0000
CPUTRIGCON2 Bit Description Initial State
SWTRIG [0] Software-Based Transmission Trigger
When this bit is set, trigger happens. This bit is automatically
cleared. Trigger function is valid only when the LCD is enabled
state. (ENVID=’11b’)
0
8.1.30 WIN0 Palette RAM Access Address
Register Address R/W Description Reset Value
WIN0_PALENTRY0 0x4C800400 R/W Window 0 Palette entry 0 address Undefined
WIN0_PALENTRY1 0x4C800404 R/W Window 0 Palette entry 1 address Undefined
~ ~ ~ ~ ~
WIN0_PALENTRY255 0x4C8007FC R/W Window 0 Palette entry 255 address Undefined
8.1.31 WIN1 Palette RAM Access Address
Register Address R/W Description Reset Value
WIN1_PALENTRY0 0x4C800800 R/W Window 1 Palette entry 0 address Undefined
WIN1_PALENTRY1 0x4C800804 R/W Window 1 Palette entry 1 address Undefined
~ ~ ~ ~ ~
WIN1_PALENTRY255 0x4C800BFC R/W Window 1 Palette entry 255 -address Undefined
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-1
23 CAMERA INTERFACE
1 OVERVIEW
This specification defines the interface of camera. The CAMIF (Camera Interface) within the S3C2450X consists
of eight parts. They are the pattern mux, capturing unit, MSDMA (Memory Scaling DMA), preview scaler, codec
scaler, preview DMA, codec DMA, and SFR. The camera interface supports ITU R BT-601/656 YCbCr 8-bit
standard and Memory. Maximum input size is 4096x4096 pixels (2048x2048 pixels for scaling).Two scalers exist.
The one is the preview scaler, which is dedicated to generate smaller size image for preview. The other one is the
codec scaler, which is dedicated to generate codec useful image like plane type YCbCr 4:2:0 or 4:2:2. Two
master DMAs can do mirror and rotate the captured image for mobile environments. And test pattern generation
can be used to calibration of input sync signals as HREF, VSYNC. Also, video sync signals and pixel clock
polarity can be inverted in the camera interface side with using register setting.
YCbCr 4:2:2
Preview Scaler Codec Scaler
ITU-R BT
601/656
Codec DMA
AHB bus
Camera interface
YCbCr 4:2:X
Memory MSDMA
T_patternMux CatchCam
Pre-Scaler
Main-Scaler
CamIf
SFR
Preview DMA
Flip
RGB 16/24-bit
YCbCr 4:2:X
Pre-Scaler
Main-Scaler
Flip
YCbCr
4:2:X
Flip
RGB
16/24-bit
Figure 23-1. Camera interface overview
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-2
1.1 FEATURES
• ITU-R BT 601/656 8-bit mode support
• DZI (Digital Zoom In) capability
• Programmable polarity of video sync signals
• Max. 4096 x 4096 pixels input support (non-scaling)
• Max. 2048 x 2048 pixels input support for codec scaling and 720 x 480 pixels input support for preview
scaling
• Image mirror and rotation (X-axis mirror, Y-axis mirror and 180° rotation)
• Preview DMA output image generation (RGB 16/24-bit format)
• Codec DMA output image generation (RGB 16/24-bit format or YCbCr 4:2:0/4:2:2 format)
• Capture frame control support in codec_path
• Scan line offset support in codec_path and preview_path
• YCbCr 4:2:2 codec image format interleave support
• MSDMA supports memory data for preview path input.
• Image effect
2 EXTERNAL INTERFACE
CAMIF can support the next video standards.
• ITU-R BT 601 YCbCr 8-bit mode
• ITU-R BT 656 YCbCr 8-bit mode
2.1 SIGNAL DESCRIPTION
Table 23-1. Camera interface signal description
Name I/O Active Description
CAMPCLK I - Pixel Clock, driven by the Camera processor
CAMVSYNC I H/L Frame Sync, driven by the Camera processor
CAMHREF I H/L Horizontal Sync, driven by the Camera processor
CAMDATA [7:0] I - Pixel Data driven by the Camera processor
CAMCLKOUT O - Master Clock to the Camera processors
CAMRESET O H/L Software Reset or Power Down for the Camera processor
CAM_FIELD_A I - Interlace field (only used in interlace mode)
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-3
2.2 TIMING DIAGRAM
VSYNC
YCb YCr YCb YCb YCr
HREF
HREF (1H)
PCLK
DATA[7:0]
Vertical lines
Horizontal width
1 frame
8-bit mode
Figure 23-2. ITU-R BT 601 Input Timing Diagram
VSYN
C
FIELD Field 1 Field 2
VSYN
C
FIELD
FieldMode = 1 (Field port connects with FIELD)
Figure 23-3. ITU-R BT 601 Interlace Timing Diagram
PCLK
DATA[7:0] CrFF 00 00 XY CbYFF 00 00 XY
Video timing
reference codes
Pixel data
Video timing
reference codes
Figure 23-4. ITU-R BT 656 Input Timing Diagram
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-4
There are two timing reference signals in ITU-R BT 656 format, one at the beginning of each video data block
(start of active video, SAV) and one at the end of each video data block(end of active video, EAV) as shown in
Figure 23-3 and below table.
Table 23-2. Video Timing Reference Codes of ITU-656 Format
Data bit number First word Second word Third word Fourth word
9 (MSB) 1 0 0 1
8 1 0 0 F
7 1 0 0 V
6 1 0 0 H
5 1 0 0 P3
4 1 0 0 P2
3 1 0 0 P1
2 1 0 0 P0
1 (Note) 1 0 0 0
0 1 0 0 0
NOTE: For compatibility with existing 8-bit interfaces, the values of bits D1 and D0 are not defined.
F = 0 (during field 1), 1 (during field 2)
V = 0 (elsewhere), 1 (during field blanking)
H = 0 (in SAV : Start of Active Video), 1 (in EAV : End of Active Video)
P0, P1, P2, P3 = protection bit
Camera interface logic can catch the video sync bits like H(SAV,EAV) and V(Frame Sync) after reserved data as
“FF-00-00”.
VSYNC
HREF
t1
t2
t3
t1
t4
Figure 23-5 Sync signal timing diagram
Table 23-3. Sync signal timing requirement
Minimum Maximum
t1 12 cycles of Pixel clock -
t2 12 cycles of Pixel clock -
t3 2 cycles of Pixel clock -
t4 12 cycles of Pixel clock -
Note! (t4 + t1) must be long enough to finish DMA transactions if preview is enabled or output data format of codec is RGB.
Because, DMA transaction for preview and codec RGB are delayed by 4 or 8 horizontal lines.
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-5
3 EXTERNAL/INTERNAL CONNECTION GUIDE
All CAMIF input signals should not occur inter-skewing to pixel clock line.
CAMRST
CAMCLK
VSYNC
HREF
PCLK
PDATA[7:0]
CAMIF
Camera A
No Skew
Figure 23-6. IO Connection Guide
4 CAMERA INTERFACE OPERATION
4.1 TWO DMA PORTS
CAMIF has two DMA port. P-port(Preview port) and C-port(Codec port) are separated from each other on AHB
bus. At the view of system bus, two ports are independent. The P-port stores the RGB image data into memory
for preview. The C-port stores the YCbCr 4:2:0 or 4:2:2 image data or RGB image data into memory for Codec as
MPEG-4, H.263, etc. These two master ports support the variable applications like DSC (Digital Still Camera),
MPEG-4 video conference, video recording, etc. For example, P-port image can be used as preview image, and
C-port image can be used as JPEG image in DSC application. Also, the register setting can separately disable P-
port or C-port.
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-6
Frame Memory (SDRAM)
P-port
C-port
ITU format
Preview image
RGB 16/24 bit
Codec image
YCbCr 4:2:0
or
YCbCr 4:2:2
or
RGB 16/24 bit
Frame Memory (SDRAM)
P-port
C-port
ITU format
Preview image
RGB 16/24 bit
Codec image
YCbCr 4:2:0
or
YCbCr 4:2:2
RGB 16/24 bit
Window cut
External
Camera
Processor CAMIF
External
Camera
Processor CAMIF
or
Figure 23-7. Two DMA Ports
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-7
4.2 CLOCK DOMAIN
CAMIF has two clock domains. The one is the system bus clock, which is HCLK. The other is the pixel clock,
which is PCLK. The system clock must be faster than pixel clock. As shown in figure 23-8, CAMCLK must be
divided from the fixed frequency like USB PLL clock. If external clock oscillator were used, CAMCLK should be
floated. Internal scaler clock is system clock. It is not necessary for two clock domains to be synchronized each
other. Other signals as PCLK should be similarly connected to shimitt-triggered level shifter.
CAMCLK
1/1, 1/2, 1/3 . . . ~
1/16
PCLK
Variable
Freq.
HCLK
Normally use
Divide
Counter
External
Camera
Processor CAMIF
MPLL
fEmpll
Divide
Counter
fmpll /d
fEPLL/d or HCLK/d
EPLL(96 MHz)
or HCLK
EPLL/
HCLKHCLK
/ fEPLL
Figure 23-8. CAMIF Clock Generation
4.3 FRAME MEMORY HIRERARCHY
Frame memories consist of four ping-pong memories for each P- and C-ports. C-port ping-pong memories have
three element memories that are luminance Y, chrominance Cb, and chrominance Cr. It is recommended that the
arbitration priority of CAMIF must be higher than any other masters except LCD controller. It is strongly
recommended that CAMIF priorities should be the fixed priorities, not rotation priorities. And in multi-AHB bus
case, the priority of system bus including CAMIF must be higher than others. If AHB-bus is traffic enough that
DMA operation is not ending during one horizontal period plus blank, it might be entered into mal-function. So, the
priority of CAMIF must be separated to other round robin or circular arbitration priorities. Also, it is recommended
that AHB bus which include CAMIF, should have higher priority than any other multi-AHB buses in memory matrix
system. And CAMIF should not be the default master of AMBA AHB system.
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-8
4-pingpong
Frame memory
(SDRAM)
ITU-601/656
YCbCr
4:2:2
8-bits
P-port
RGB
4:4:4
C-port
YCbCr 4:2:0,2
RGB 4;4:4
Camera
Interface AHB bus &
Memorycontroller
C-port Y 1 / RGB 1
C-port Cb 1
C-port Cr 1
C-port Y 2 / RGB 2
C-port Cb 2
C-port Cr 2
C-port Y 3 / RGB 3
C-port Cb 3
C-port Cr 3
C-port Y 4 / RGB 4
C-port Cb 4
C-port Cr 4
P-port RGB 1
P-port RGB 2
P-port RGB 3
P-port RGB 4
Figure 23-9. Ping-pong Memory Hierarchy
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-9
4.4 MEMORY STORING METHOD
The storing method to the frame memory is the little-endian method in codec path. The first entering pixels stored
into LSB sides, and the last entering pixels stored into MSB sides. The carried data by AHB bus is 32-bit word.
So, CAMIF make the each Y-Cb-Cr words by little endian style. For RGB format, two different formats exist. One
pixel (Color 1 pixel) is one word for RGB 24-bit format. Otherwise, two pixels are one word for RGB 16-bit format.
Refer to next diagram.
Y frame memory
PCLK
DATA
ITU-601/656 YCbCr
4:2:2 8-bit input timing
Cb frame memory
Cr frame memory
Little endian method
time
Y1 Cb1 Y2 Cr1 Y3 Cb2 Y4
Cr2
Little endian method
Little endian method
RGB frame memory
(24-bit)
RGB frame memory
(16-bit)
32-bit
32-bit
16-bit
YCbCr 4:2:2 interleave memory
Little endian method
Camera
Interface
Y4 Y3 Y2 Y1 Y8 Y7 Y6 Y5
Cb4 Cb3 Cb2 Cb1 Cb8 Cb7 Cb6 Cb5
Cr4 Cr3 Cr2 Cr1 Cr1 Cr7 Cr6 Cr5
Cr1 Y2 Cb1 Y1 Cr2 Y4 Cb2 Y3
RGB1RGB2RGB3RGB4RGB4RGB6RGB7RGB8
RGB2/1 RGB4/3 RGB6/5 RGB8/7 RGB10/9 RGB12/11 RGB14/13 RGB16/15
R G B
2 1
R 5 G 6 B 5
Figure 23-10. Memory Storing Style
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-10
4.5 TIMING DIAGRAM FOR REGISTER SETTING
The first register setting for frame capture command can be occurred in anywhere of frame period. But, it is
recommend to do first setting at the VSYNC “L” state. VSYNC information can be read from status SFR. Refer to
the below figure. All command include ImgCptEn, is valid at VSYNC falling edge. Be sure that except first SFR
setting, all command should be programmed in ISR(Interrupt Service Routine). It is not allowed for target size
information to be changed during capture operation. However, image mirror or rotation, windowing, and Zoom In
settings are allowed to change in capturing operation. but, In case preview path select MSDMA input mode, all
command should be programmed after MSDMA and Preview DMA operation end.
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-11
< New command valid timing diagram for PIPDMA memory input>
Image Capture
Read Memory
New command SFR setting
(New command)
PreviewDMA end
PIPDMA end
Read start
In capturing
Image Capture
Read Memory
SFR setting
(ImgCptEn_PrSc)
SEL_DMA_CAM SFR setting
(SEL_DMA_CAM)
VSYNC
HREF
INTERRUPT
New SFR command
In Capturing
Reserved
Image Capture
< New command valid timing diagram >
New Command
VSYNC
HREF
INTERRUPT
SFR setting (ImgCptEn)
Multi frame
capturing
Reserved
Image Capture
< Frame Capture Start for external camera input >
< Frame Capture Start for MSDMA memory input >
SFR setting
(ENVID_MS)
SFR setting
(ENVID_MS)
Figure 23-11. Timing Diagram for Register Setting
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-12
4.5.1 Timing diagram for Last IRQ (Camera capture mode)
IRQ except LastIRQ is generated before image capturing. Last IRQ which means capture-end can be set by
following timing diagram. LastIRQEn is auto-cleared and ,as mentioned, SFR setting in ISR is for next frame
command. So, for adequate last IRQ, you should follow next sequence between LastIRQEn and
ImgCptEn/ImgCptEn_CoSc/ImgCptEnPrSC. It is recommended that ImgCptEn/ImgCptEn_CoSc/ImgCptEnPrSC
are set at same time and at last of SFR setting in ISR. FrameCnt which is read in ISR, means next frame count.
On following diagram, last captured frame count is “1”. That is, Frame 1 is the last-captured frame among frame
0~3. FrameCnt is increased by 1 at IRQ rising.
- Camera input capture path (applied both Preview & Codec path)
ISR
region
ISR
region
ISR
region
VSYNC
ISR
region
ImgCptEn(cmd)
LastIRQEn
Capture O Capture O Capture O Capture X
IRQ
Auto cleared Last
IRQ
ISR
region ISR
region ISR
region
FrameCnt
Capture O Capture O
(Frame_3) (Frame_0) (Frame_1) (Frame_3) (Frame_0)
0 1 2 3 0 1
3
ISR
region
ISR
region
ISR
region
VSYNC
ISR
region
ImgCptEn(cmd)
LastIRQEn
Capture O Capture O Capture O Capture X
IRQ Last IRQ
Low
ISR
region ISR
region ISR
region
FrameCnt
Capture O Capture O
(Frame_3) (Frame_0) (Frame_1) (Frame_2) (Frame_3)
0 1 2 2 3 0
3
VSYNC
IRQ
A
B
A = 8 cycle of pixel clock + 3 cycle of system clock
B = 1 cycle of system clock
4.5.2 Timing diagram for IRQ (Memory data processing mode)
MSDMA(Memory data input path) input is applied only preview path !!! when SFR SEL_DMA_CAM = ‘1’ ). Codec
path doesn’t care. codec path is applied a only camera capturing case. IRQ is generated after Preview DMA
operation done per frame. This mode is aware of starting point by user’s SFR setting (ENVID_MS ‘0’ Æ ‘1’). so,
this mode doesn’t need IRQ of starting point and LastIRQ. FrameCnt is increased by 1 at ENVID_MS low to rising
(‘0’ Æ ‘1’) and ImgCptEn_PrSC ‘1’
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-13
SFR
region
SFR
region
SFR
region
ENVID_MS
SFR
region
Preview DMA frame done
(internal signal)
Capture O Capture O Capture X
IRQ
SFR
region SFR
region SFR
region
FrameCnt 01 12330
Capture O Capture O
(Frame_3) (Frame_0) (Frame_2) (Frame_3)
Capture O
(Frame_1)
ImgCptEn_PrSC
FrameCnt ++
Figure 23-12. Timing Diagram for Last IRQ
4.6 MSDMA FEATURE
MSDMA supports memory data scaling. Camera interface has two input devices (only preview path). First is
external camera. Second is Memory data. If MSDMA (reading the memory data) want to use in preview path. SFR
SEL_DMA_CAM signal should be set ‘1’. This input path is called Memory Scaling DMA path.
NOTES: Only two image format support for MSDMA input. (= Saved memory format)
1. YCbCr 4:2:0
2. YCbCr 4:2:2 (Interleave)
Signal Muxing
ITU-R 601/656
4:2:2(interleave)
YCbCr 4:2:0
(non-interleave)
RGB
MSDMA path
Preview path
External
camera
Memory MSDMA
T_PatternMux CatchCam
Scaler
Color
Space
Converter
Figure 23-13. MSDMA or External Camera interface (only CAMIFpreview path)
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-14
5 SOFTWARE INTERFACE
CAMIF SFR (Special Function Register)
6 CAMERA INTERFACE SPECIAL REGISTERS
• When preview input use MSDMA path, the first column mark (v) sfr will be related to the preview operation.
• The last column means that each value can change by each VSYNC start during capture enable.
(O : change , X : not change)
6.1 SOURCE FORMAT REGISTER
Register Address R/W Description Reset Value
CISRCFMT 0x4D80_0000 RW Source format register 0
CISRCFMT Bit Description Initial
State Change
State
ITU601_656n [31] 1 = ITU-R BT.601 YCbCr 8-bit mode enable
0 = ITU-R BT.656 YCbCr 8-bit mode enable
0 X
UVOffset
[30] Cb,Cr value offset control.
1 = +128
0 = +0 (normally used)
0 X
In16bit [29] This bit must be 0. 0 X
SourceHsize [28:16] Source horizontal pixel number (must be 8’s multiple)
(Also, must be 4’s multiple of PreHorRatio if WinOfsEn is 0)
0 X
Order422
[15:14] Input YCbCr order inform for input 8-bit mode
8-bit mode
00 : YCbYCr
01 : YCrYCb
10 : CbYCrY
11 : CrYCbY
0 X
Reserved [13] 0 X
SourceVsize
[12:0] Source vertical pixel number.
(Also, must be multiple of PreVerRatio when scale down if
WinOfsEn is 0)
0 X
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-15
6.2 WINDOW OPTION REGISTER
Register Address R/W Description Reset Value
CIWDOFST 0x4D80_0004 RW Window offset register 0
SourceHsize
Original Input
Window Cut
: WinHorOfst,WinHorOfst2
: WinVerOfst,WinVerOfst2
TargetHsize_xx
TargetHsize_xx
= TargetHsize_Co or
TargetHsize_Pr
1 2
3
4
3 4
1 2
,
,
Source Vsize
TargetVsize_xx
Figure 23-14. Window Offset Scheme
(WinHorOfst2 & WinVerOfst2 are assigned in the CIWDOFST2 register)
CIWDOFST Bit Description Initial
State Change
State
WinOfsEn [31] 1 = window offset enable
0 = no offset 0 O
ClrOvCoFiY [30] 1 = clear the overflow indication flag of input CODEC FIFO Y
0 = normal 0 X
Reserved [29:27] 0 X
WinHorOfst [26:16] Window horizontal offset by pixel unit. (It should be 2’s multiple)
Caution: SourceHsize-WinHorOfst- WinHorOfst2 should be 8’s
multiple.
0 O
ClrOvCoFiCb [15] 1 = clear the overflow indication flag of input CODEC FIFO Cb
0 = normal 0 X
ClrOvCoFiCr [14] 1 = clear the overflow indication flag of input CODEC FIFO Cr
0 = normal 0 X
ClrOvPrFiCb [13] 1 = clear the overflow indication flag of input PREVIEW FIFO Cb
0 = normal 0 X
ClrOvPrFiCr [12] 1 = clear the overflow indication flag of input PREVIEW FIFO Cr
0 = normal 0 X
Reserved [11] 0 X
WinVerOfst [10:0] Window vertical offset by pixel unit 0 O
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-16
NOTE: Clear bits should be set by zero after clearing the flags.
It should be as (WinHorOfst + WinHorOfst2) >= (SourceHsize – 720 * PreHorRatio_Pr)
Crop Hsize ( = SourceHsize – WinHorOfst - WinHorOfst2) must be 4’s multiple of PreHorRatio.
Crop Vsize ( = SourceVsize – WinVerOfst - WinVerOfst2) must be multiple of PreVerRatio when scale down. and
must be an even number if In422_Co = 0 and Out422_Co = 0
< Example >
Crop Hsize Permitted Prescale_ratio PreDstWidth_xx
8n 2 4n
16n 2 or 4 4n
32n 2, 4 or 8 4n
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-17
6.3 GLOBAL CONTROL REGISTER
Register Address R/W Description Reset Value
CIGCTRL 0x4D80_0008 RW Global control register 2000_0000
CIGCTRL Bit Description Initial
State Change
State
SwRst
[31] Camera interface software reset. Before setting this bit, you
should set the ITU601_656n bit of CISRCFMT as “1”
temporarily at first SFR setting. Next sequence is
recommended.
(ITU601 case : ITU601_656n “1” → SwRst “1” → SwRst “0”
for first SFR setting ,
ITU656 case : ITU601_656n “1” → SwRst “1” → SwRst “0”
→ ITU601_656n “0” for first SFR setting)
0 X
CamRst [30] External camera processor Reset or Power Down control 0 X
Reserved [29] Must be 1 1 X
TestPattern
[28:27] This register should be set at only ITU-T 601 8-bit mode. Not
allowed with ITU-T 656 mode. (max. 1280 X 1024)
00 = external camera processor input (normal)
01 = color bar test pattern
10 = horizontal increment test pattern
11 = vertical increment test pattern
0 X
InvPolPCLK [26] 1 = inverse the polarity of PCLK 0 = normal 0 X
InvPolVSYNC [25] 1 = inverse the polarity of VSYNC 0 = normal 0 X
InvPolHREF [24] 1 = inverse the polarity of HREF 0 = normal 0 X
Non-use [23] 0 X
IRQ_Ovfen [22] 1 = Overflow interrupt enable (Interrupt is generated during
overflow occurrence)
0 = Overflow interrupt disable (normal)
0 X
Href_mask [21] 1 = mask out Href during Vsync high
0 = no mask 0 X
Reserved [20:0] 0 X
FIELDMODE [2]
ITU601 Interlace field port mode enable (don’t care this bit in
itu656). This bit should be connected with FIELD signal
1 = FIELD port enable 0 = disable 0 X
InvPolFIELD [1] 1 = inverse the polarity of FIELD 0 = normal 0 X
Cam_Interlace [0]
External camera data transmission mode
1 = Interlace 0 = Progressive 0 X
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-18
Overflow
(preview)
IRQ_p
IRQ_Cl_p
Overflow
(codec)
IRQ_Ovfen
IRQ_c
IRQ_Cl_c
Figure 23-15. Interrupt Generation Scheme
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-19
6.4 WINDOW OPTION REGISTER 2
Register Address R/W Description Reset Value
CIDOWSFT2 0x4D80_0014 RW Window offset register 2 0
CIWDOFST2 Bit Description Initial
State Change
State
Reserved [31:27] 0 X
WinHorOfst2
[26:16] Window horizontal offset2 by pixel unit. (It should be 2’s
multiple)
Caution : SourceHsize-WinHorOfst- WinHorOfst2 should be
8’s multiple.
0 O
Reserved [15:11] 0 X
WinVerOfst2 [10:0] Window vertical offset2 by pixel unit 0 O
6.5 Y1 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOYSA1 0x4D80_0018 RW
1st frame start address for codec DMA 0
CICOYSA1 Bit Description Initial
State Change
State
CICOYSA1
[31:0] Output format : YCbCr 4:2:2 or 4:2:0 Æ Y 1st frame start
address
Output format : RGB 16/24 bit Æ RGB 1st frame start address
0 X
6.6 Y2 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOYSA2 0x4D80_001C RW
2nd frame start address for codec DMA 0
CICOYSA2 Bit Description Initial
State Change
State
CICOYSA2
[31:0] Output format : YCbCr 4:2:2 or 4:2:0 Æ Y 2nd frame start
address
Output format : RGB 16/24 bit Æ RGB 2nd frame start
address
0 X
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-20
6.7 Y3 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOYSA3 0x4D80_0020 RW
3rd frame start address for codec DMA 0
CICOYSA3 Bit Description Initial
State Change
State
CICOYSA3
[31:0] Output format : YCbCr 4:2:2 or 4:2:0 Æ Y 3rd frame start
address
Output format : RGB 16/24 bit Æ RGB 3rd frame start
address
0 X
6.8 Y4 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOYSA4 0x4D80_0024 RW
4th frame start address for codec DMA 0
CICOYSA4 Bit Description Initial
State Change
State
CICOYSA4
[31:0] Output format : YCbCr 4:2:2 or 4:2:0 Æ Y 4th frame start
address
Output format : RGB 16/24 bit Æ RGB 4th frame start address
0 X
6.9 CB1 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOCBSA1 0x4D80_0028 RW
Cb 1st frame start address for codec DMA 0
CICOCBSA1 Bit Description Initial
State Change
State
CICOCBSA1 [31:0] Cb 1st frame start address for codec DMA 0 X
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-21
6.10 CB2 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOCBSA2 0x4D80_002C RW
Cb 2nd frame start address for codec DMA 0
CICOCBSA2 Bit Description Initial
State Change
State
CICOCBSA2 [31:0] Cb 2nd frame start address for codec DMA 0 X
6.11 CB3 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOCBSA3 0x4D80_0030 RW
Cb 3rd frame start address for codec DMA 0
CICOCBSA3 Bit Description Initial
State Change
State
CICOCBSA3 [31:0] Cb 3rd frame start address for codec DMA 0 X
6.12 CB4 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOCBSA4 0x4D80_0034 RW
Cb 4th frame start address for codec DMA 0
CICOCBSA4 Bit Description Initial
State Change
State
CICOCBSA4 [31:0] Cb 4th frame start address for codec DMA 0 X
6.13 CR1 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOCRSA1 0x4D80_0038 RW
Cr 1st frame start address for codec DMA 0
CICOCRSA1 Bit Description Initial
State Change
State
CICOCRSA1 [31:0] Cr 1st frame start address for codec DMA 0 X
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-22
6.14 CR2 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOCRSA2 0x4D80_003C RW
Cr 2nd frame start address for codec DMA 0
CICOCRSA2 Bit Description Initial
State Change
State
CICOCRSA2 [31:0] Cr 2nd frame start address for codec DMA 0 X
6.15 CR3 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOCRSA3 0x4D80_0040 RW
Cr 3rd frame start address for codec DMA 0
CICOCRSA3 Bit Description Initial
State Change
State
CICOCRSA3 [31:0] Cr 3rd frame start address for codec DMA 0 X
6.16 CR4 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CICOCRSA4 0x4D80_0044 RW
Cr 4th frame start address for codec DMA 0
CICOCRSA4 Bit Description Initial
State Change
State
CICOCRSA4 [31:0] Cr 4th frame start address for codec DMA 0 X
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-23
6.17 CODEC TARGET FORMAT REGISTER
Register Address R/W Description Reset Value
CICOTRGFMT 0x4D80_0048 RW Target image format of codec DMA 0
CICOTRGFMT Bit Description Initial
State Change
State
In422_Co
[31] 1 = YCbCr 4:2:2 codec scaler input image format.
0 = YCbCr 4:2:0 codec scaler input image format. In this
case, horizontal line decimation is performed before codec
scaler. (normal)
0 O
Out422_Co
[30] 1 = YCbCr 4:2:2 codec scaler output image format. This
mode is mainly for S/W JPEG.
0 = YCbCr 4:2:0 codec scaler output image format. This
mode is mainly for MPEG-4 codec and H/W JPEG
DCT.(normal)
It must not be set to 0 when In422_Co is set to 0.
0 O
Interleave_Co
[29] 1 = Interleave ON (support image format YCbCr 4:2:2 only)
Y0Cb0Y1Cr0Y2Cb1Y3Cr1……
0 = Interleave OFF
Y0Y1Y2Y3….Cb0Cb1….Cr0Cr1….
0 O
TargetHsize_Co [28:16] Horizontal pixel number of target image for codec DMA (16’s
multiple) 0 X
FlipMd_Co
[15:14] Image mirror and rotation for codec DMA
00 = Normal
01 = X-axis mirror
10 = Y-axis mirror
11 = 180° rotation
0 O
Reserved [13] 0 X
TargetVsize_Co [12:0] Vertical pixel number of target image for codec DMA(8’s
multiple when RGB mode is selected) 0 X
TargetHsize_Co and TargetVsize_Co should not be larger than SourceHsize and SourceVsize.
Caution! If TargetVsize_Co value is set to an odd number(N) and output format is YCbCr 4:2:0, The odd
number(N) of Y lines and the (N-1)/2 of Cb, Cr lines are generated.
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-24
Original image
X-axis flip
Y-axis flip
180' rotation
Figure 23-16. Codec image mirror and rotation
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-25
6.18 CODEC DMA CONTROL REGISTER
Register Address R/W Description Reset Value
CICOCTRL 0x4D80_004C RW Codec DMA control related 0
CICOCTRL Bit Description Initial
State Change
State
Reserved [31:24] 0 X
Yburst1_Co
[23:19] Output format : YCbCr Æ Main burst length for codec Y
frames
Output format : RGB Æ Main burst length for RGB frame
0 X
Yburst2_Co
[18:14] Output format : YCbCr Æ Remained burst length for codec Y
frames
Output format : RGB Æ Remained burst length for RGB
frame
0 X
Cburst1_Co [13:9] Main burst length for codec Cb/Cr frames 0 X
Cburst2_Co [8:4] Remained burst length for codec Cb/Cr frames 0 X
Reserved [3] 0 X
LastIRQEn_Co
[2] 1 = enable last IRQ at the end of frame capture (It is
recommended to check the done signal of capturing image
for JPEG. One pulse)
0 = normal
0 X
Order422_Co
[1:0] Interleaved YCbCr 4:2:2 output order memory storing style
LSB MSB
00 Y0Cb0Y1Cr0
01 Y0Cr0Y1Cb0
10 Cb0Y0Cr0Y1
11 Cr0Y0Cb0Y1
0 X
• Interleaved burst length
Y burst length 2 , 4 , 8
C burst length (C burst length = Y burst length / 2) 1 , 2 , 4
Wanted burst length ( = Y + 2C ) 4 , 8 , 16
NOTE: When Codec output format is YCbCr 4:2:2 interleave ,ScalerBypass_Co = 0 and ScaleUp_V_Co = 1 , Wanted main
burst length = 16 and Wanted remained burst length ≠ 16 is not allowed.
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-26
• Non-Interleaved burst length
Y Main burst length = 4, 8, 16 Remained burst length = 4, 8, 16
C Main burst length = 2, 4, 8, 16 Remained burst length = 2, 4, 8, 16
NOTE: When Interleave_Co = 1, there are some restricts in burst length setting as below.
Burst size calculations are done to determine the wanted burst length. After finding the wanted burst
length.
The SFR fields are programmed as shown below,
Y : wanted Main burst length = 2 * Yburst1_Co, and wanted Remained burst length = 2 * Yburst2_Co.
Cb/Cr : wanted Main burst length = Yburst1_Co / 2 = Cburst1_Co, and wanted Remained burst length =
Yburst2_Co / 2 = Cburst2_Co
Example 1. Target image size : QCIF (horizontal Y width = 176 pixels. 1 pixel = 1 Byte. 1 word = 4 pixel)
176 / 4 = 44 words , 44 % 8 = 4 Æ main burst = 8, remained burst = 4
If Interleave_Co = 1 and YCbCr = 4:2:2
176 x (1 word / 2 pixles) = 88 words , 88 % 16 = 8 Æ Wanted main burst = 16, Wanted remained burst = 8
Wanted main burst = 16 = 2 * Yburst1 = 4 * Cburst1, Wanted remained burst = 8 = 2 * Yburst2 = 4 * Cburst2
Yburst1_Co = 8, Yburst2_Co = 4
Example 2. Target image size : VGA (horizontal Y width = 640 pixels. 1 pixel = 1 Byte. 1 word = 4 pixel)
640 / 8 = 80 word , 160 % 8 = 0 Æ main burst = 8, remained burst = 8
If Interleave_Co = 1 , RGB565 mode
640 x (1 word / 2 pixel) = 320 words , 320 % 16 = 0 Æ Wanted main burst = 16, Wanted remained burst = 16
Yburst1_Co = 8, Yburst2_Co = 8
If Interleave_Co = 1 , RGB888 mode
640 x (1 word / 1 pixels) = 640 words, 640 % 16 = 0 Æ Wanted main burst = 16, Wanted remained burst = 16
Yburst1_Co = 8, Yburst2_Co = 8
6.19 REGISTER SETTING GUIDE FOR CODEC SCALER AND PREVIEW SCALER
SRC_Width and DST_Width satisfy the word boundary constraints such that the number of horizontal pixel can be
represented to kn where n = 1,2,3, … and k = 1 / 2 / 8 for 24bppRGB / 16bppRGB / YCbCr420 image,
respectively. TargetHsize should not be larger than SourceHsize. Similarly, TargetVsize should not be larger than
SourceVsize.
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-27
SourceHsize
TargetHsize_xx
Original Input
Scale Down
SRC_Width = SourceHsize
SRC_Height = SourceVsize
TargetHsize_xx = TargetHsize_Co or TargetHsize_Pr
DST_Width = TargetHsize_xx
DST_Height = TargetVsize_xx
SourceVsize
TargetVsize_xx
SourceHsize
Original Input Zoom In
: WinHorOfst, WinHorOfst2
: WinVerOfst, WinVerOfst2
TargetHsize_xx
TargetHsize_xx = TargetHsize_Co or TargetHsize_Pr
DST_Width = TargetHsize_xx
DST_Height = TargetVsize_xx
SRC_Width = SourceHsize - (WinHorOfst + WinHorOfst2)
SRC_Height = SourceVsize - (WinVerOfst + WinVerOfst2)
SourceVsize
TargetVsize_xx
3
1
4
2
1 2
3 4
Figure 23-17. Scaling scheme
The other control registers of pre-scaled image size, pre-scale ratio, pre-scale shift ratio and main scale ratio are
defined according to the following equations.
If ( SRC_Width >= 64 × DST_Width ) { Exit(-1); /* Out Of Horizontal Scale Range */ }
else if (SRC_Width >= 32 × DST_Width) { PreHorRatio_xx = 32; H_Shift = 5; }
else if (SRC_Width >= 16 × DST_Width) { PreHorRatio_xx = 16; H_Shift = 4; }
else if (SRC_Width >= 8 × DST_Width) { PreHorRatio_xx = 8; H_Shift = 3; }
else if (SRC_Width >= 4 × DST_Width) { PreHorRatio_xx = 4; H_Shift = 2; }
else if (SRC_Width >= 2 × DST_Width) { PreHorRatio_xx = 2; H_Shift = 1; }
else { PreHorRatio_xx = 1; H_Shift = 0; }
PreDstWidth_xx = SRC_Width / PreHorRatio_xx;
MainHorRatio_xx = ( SRC_Width << 8 ) / ( DST_Width << H_Shift);
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-28
If ( SRC_Height >= 64 × DST_Height ) { Exit(-1); /* Out Of Vertical Scale Range */ }
else if (SRC_Height >= 32 × DST_Height) { PreVerRatio_xx = 32; V_Shift = 5; }
else if (SRC_Height >= 16 × DST_Height) { PreVerRatio_xx = 16; V_Shift = 4; }
else if (SRC_Height >= 8 × DST_Height) { PreVerRatio_xx = 8; V_Shift = 3; }
else if (SRC_Height >= 4 × DST_Height) { PreVerRatio_xx = 4; V_Shift = 2; }
else if (SRC_Height >= 2 × DST_Height) { PreVerRatio_xx = 2; V_Shift = 1; }
else { PreVerRatio_xx = 1; V_Shift = 0; }
PreDstHeight_xx = SRC_Height / PreVerRatio_xx;
MainVerRatio_xx = ( SRC_Height << 8 ) / ( DST_Height << V_Shift);
SHfactor_xx = 10 – ( H_Shit + V_Shift);
Caution! In preview path, Pre-scaled H_width must be the less than 720. (The maximum size of preview
path scaler’s horizontal line buffer is 720.)
Example 1. Source image horizontal size : SRC_Width = 1280, Target image horizontal size : DST_Width = 480
(SRC_Width >= 2 × DST_Width) -> PreHorRatio_xx = 2
PreDstWidth_xx = SRC_Width / PreHorRatio_xx = 1280/2 = 640
PreDstWidth_xx = 640 <= 640(The maximum size of preview path scaler’s horizontal line buffer)
Scaling is success.
Example 2. Source image horizontal size : SRC_Width = 800, Target image horizontal size : DST_Width = 480
(SRC_Width < 2 × DST_Width) PreHorRatio_xx = 1
PreDstWidth_xx = SRC_Width / PreHorRatio_xx = 800/1 = 800
PreDstWidth_xx = 800 > 720(The maximum size of preview path scaler’s horizontal line buffer)
Scaling is failed.
Caution! In Zoom-In case, you should check the next equation.
((SourceHsize - (WinHorOfst + WinHorOfst2)) / PreHorRatio_Pr) <= 720
Caution! In preview memory data input path, you should not use Zoom-In, crop and image effect function.
(External camera input path use Zoom-In , crop and image effect function)
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-29
6.20 CODEC PRE-SCALER CONTROL REGISTER 1
Register Address R/W Description Reset Value
CICOSCPRERATIO 0x4D80_0050 RW Codec pre-scaler ratio control 0
CICOSCPRERATIO Bit Description Initial
State Change
State
SHfactor_Co [31:28] Shift factor for codec pre-scaler 0 O
Reserved [27:23] 0 X
PreHorRatio_Co [22:16] Horizontal ratio of codec pre-scaler 0 O
Reserved [15:7] 0 X
PreVerRatio_Co [6:0] Vertical ratio of codec pre-scaler 0 O
6.21 CODEC PRE-SCALER CONTROL REGISTER 2
Register Address R/W Description Reset Value
CICOSCPREDST 0x4D80_0054 RW Codec pre-scaler destination format 0
CICOSCPREDST Bit Description Initial
State Change
State
Reserved [31:28] 0 X
PreDstWidth_Co [27:16] Destination width for codec pre-scaler 0 O
Reserved [15:12] 0 X
Reserved [31:28] 0 X
PreDstHeight_Co [11:0] Destination height for codec pre-scaler 0 O
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-30
6.22 CODEC MAIN-SCALER CONTROL REGISTER
Register Address R/W Description Reset Value
CICOSCCTRL 0x4D80_0058 RW Codec main-scaler control 0
CICOSCCTRL Bit Description Initial
State Change
State
ScalerBypass_Co
[31] Codec scaler bypass for upper 2048 x 2048 size (In this
case, ImgCptEn_CoSC and ImgCptEn_PrSC should be 0,
but ImgCptEn should be 1. It is not allowed to capturing
preview image. This mode is intended to capture JPEG
input image for DSC application) In this case, input pixel
buffering depends on only input FIFOs, so system bus
should be not busy in this mode.
0 O
ScaleUp_H_Co [30] Horizontal scale up/down flag for codec scaler (In 1:1
scale ratio, this bit should be “1”) 1: up, 0:down 0 O
ScaleUp_V_Co [29] Vertical scale up/down flag for codec scaler (In 1:1 scale
ratio, this bit should be “1”) 1: up, 0:down 0 O
Reserved [28:25] 0 X
MainHorRatio_Co [24:16] Horizontal scale ratio for codec main-scaler 0 O
CoScalerStart [15] Codec scaler start 0 O
Reserved [14:9] 0 X
MainVerRatio_Co [8:0] Vertical scale ratio for codec main-scaler 0 O
6.23 CODEC DMA TARGET AREA REGISTER
Register Address R/W Description Reset Value
CICOTAREA 0x4D80_005C RW Codec pre-scaler destination format 0
CICOTAREA Bit Description Initial
State Change
State
Reserved [31:26] 0 X
CICOTAREA [25:0] Target area for codec DMA
= Target H size x Target V size
0 X
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-31
6.24 CODEC STATUS REGISTER
Register Address R/W Description Reset Value
CICOSTATUS 0x4D80_0064 R Codec path status 0
CICOSTATUS Bit Description Initial
State Change
State
OvFiY_Co [31] Overflow state of codec FIFO Y 0 X
OvFiCb_Co [30] Overflow state of codec FIFO Cb 0 X
OvFiCr_Co [29] Overflow state of codec FIFO Cr 0 X
VSYNC [28] Camera VSYNC (This bit can be referred by CPU for first
SFR setting after external camera muxing. And, it can be
seen in the ITU-R BT 656 mode)
0 X
FrameCnt_Co [27:26] Frame count of codec DMA (This counter value means the
next frame number) 0 X
WinOfstEn_Co [25] Window offset enable status 0 X
FlipMd_Co [24:23] Flip mode of codec DMA 0 X
ImgCptEn_
CamIf [22] Image capture enable of camera interface 0 X
ImgCptEn_
CoSC [21] Image capture enable of codec path 0 X
VSYNC [20] External camera VSYNC (polarity inversion was not
adopted.) X X
Reserved [9:1] Reserved 0 X
FIELD [0] Camera FIELD(polarity inversion was adopted) 0 X
6.25 RGB1 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CIPRCLRSA1 0x4D80_006C RW
RGB 1st frame start address for preview DMA 0
CIPRCLRSA1 Bit Description Initial
State Change
State
CIPRCLRSA1 (v) [31:0] RGB 1st frame start address for preview DMA 0 X
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-32
6.26 RGB2 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CIPRCLRSA2 0x4D80_0070 RW
RGB 2nd frame start address for preview DMA 0
CIPRCLRSA2 Bit Description Initial
State Change
State
CIPRCLRSA2 (v) [31:0] RGB 2nd frame start address for preview DMA 0 X
6.27 RGB3 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CIPRCLRSA3 0x4D80_0074 RW
RGB 3rd frame start address for preview DMA 0
CIPRCLRSA3 Bit Description Initial
State Change
State
CIPRCLRSA3 (v) [31:0] RGB 3rd frame start address for preview DMA 0 X
6.28 RGB4 START ADDRESS REGISTER
Register Address R/W Description Reset Value
CIPRCLRSA4 0x4D80_0078 RW
RGB 4th frame start address for preview DMA 0
CIPRCLRSA4 Bit Description Initial
State Change
State
CIPRCLRSA4 (v) [31:0] RGB 4th frame start address for preview DMA 0 X
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-33
6.29 PREVIEW TARGET FORMAT REGISTER
Register Address R/W Description Reset Value
CIPRTRGFMT 0x4D80_007C RW Target image format of preview DMA 0x8000_0000
Original image
X-axis flip
Y-axis flip
180' rotation
Figure 23-18. Preview Image Mirror and Rotation
CIPRTRGFMT Bit Description Initial
State Change
State
CSCRange (v)
[31:30] YCbCr Input Data Dynamic Range Selection for the
Color Space Conversion
2’b11 = Forbidden
2’b10 = 0 < Y/Cb/Cr <255 (Recommended)
2’b01 = 16 <= Y <= 235, 16 <= Cb/Cr <= 240
2’b00 = Reserved
2’b10 O
Reserved [29] 0 X
TargetHsize_Pr (v) [28:16] Horizontal pixel number of target image for preview
DMA 16bppRGB:4n(n=1,2,3,…)
24bpp RGB : 2n(n=1,2,3, …)
0 X
FlipMd_Pr (v)
[15:14] Image mirror and rotation for preview DMA
00 = normal 01 = x-axis mirror
10 = y-axis mirror 11 = 180° rotation
0 O
Reserved [13] 0 X
TargetVsize_Pr (v) [12:0] Vertical pixel number of target image for preview DMA
(8’s multiple) 0 X
TargetHsize_Pr and TargetVsize_Pr should not be larger than SourceHsize and SourceVsize.
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-34
6.30 PREVIEW DMA CONTROL REGISTER
Register Address R/W Description Reset Value
CIPRCTRL 0x4D80_0080 RW Preview DMA control related 0
CIPRCTRL Bit Description Initial
State Change
State
Reserved [31:24] 0 X
RGBburst1_Pr (v) [23:19] Main burst length for preview RGB frames 0 X
RGBburst2_Pr (v) [18:14] Remained burst length for preview RGB frames 0 X
Reserved [13:3] 0 X
LastIRQEn_Pr (v)
[2] 1 : enable last IRQ at the end of frame capture (One
pulse)
0 : normal
0 X
Reserved [1:0] 0 X
Main burst lengths must be one of the 4,8,16 and Remained burst lengths must be one of the 2,4,8,16.
Example 1. Target image size : QCIF for RGB 32-bit format (horizontal width = 176 pixels. 1 pixel = 1 word)
176 pixel = 176 word.
176 % 16 = 0 Æ main burst = 16, remained burst = 16
Example 2. Target image size : VGA for RGB 16-bit format (horizontal width = 640 pixels. 2 pixel = 1 word)
640 / 2 = 320 word.
320 % 16 = 0 Æ main burst = 16, remained burst = 16
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-35
6.31 PREVIEW PRE-SCALER CONTROL REGISTER 1
Register Address R/W Description Reset Value
CIPRSCPRE
RATIO 0x4D80_0084 RW Preview pre-scaler ratio control 0
CIPRSC
PRERATIO Bit Description Initial
State Change
State
SHfactor_Pr (v) [31:28] Shift factor for preview pre-scaler 0 O
Reserved [27:23] 0 X
PreHorRatio_Pr (v) [22:16] Horizontal ratio of preview pre-scaler 0 O
Reserved [15:7] 0 X
PreVerRatio_Pr (v) [6:0] Vertical ratio of preview pre-scaler 0 O
6.32 PREVIEW PRE-SCALER CONTROL REGISTER 2
Register Address R/W Description Reset Value
CIPRSC
PREDST 0x4D80_0088 RW Preview pre-scaler destination format 0
CIPRSC
PREDST Bit Description Initial
State Change
State
Reserved [31:28] 0 X
PreDstWidth_
Pr (v) [27:16] Destination width for preview pre-scaler 0 O
Reserved [15:12] 0 X
PreDstHeight_
Pr (v) [11:0] Destination height for preview pre-scaler 0 O
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
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6.33 PREVIEW MAIN-SCALER CONTROL REGISTER
Register Address R/W Description Reset Value
CIPRSCCTRL 0x4D80_008C RW Preview main-scaler control 0
CIPRSCCTRL Bit Description Initial
State Change
State
Sample_Pr (v) [31] Sampling method for format conversion. (normally 1) 0 O
RGBformat_Pr
(v) [30] 1 = 24-bit RGB
0 = 16-bit RGB 0 O
ScaleUp_H_Pr
(v)
[29] Horizontal scale up/down flag for preview scaler
(In 1:1 scale ratio, this bit should be “1”)
1 = up
0 = down
0 O
ScaleUp_V_Pr
(v)
[28] Vertical scale up/down flag for preview scaler
(In 1:1 scale ratio, this bit should be “1”)
1 = up
0 = down
0 O
Reserved [27:25] 0 X
MainHorRatio_
Pr (v) [24:16] Horizontal scale ratio for preview main-scaler 0 O
PrScalerStart
(v) [15] Preview scaler start 0 O
Reserved [14:9] 0 X
MainVerRatio_
Pr (v) [8:0] Vertical scale ratio for preview main-scaler 0 O
6.34 PREVIEW DMA TARGET AREA REGISTER
Register Address R/W Description Reset Value
CIPRTAREA 0x4D80_0090 RW Preview pre-scaler destination format 0
CIPRTAREA Bit Description Initial
State Change
State
Reserved [31:26] 0 X
CIPRTAREA (v) [25:0] Target area for preview DMA
= Target H size x Target V size
0 X
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-37
6.35 PREVIEW STATUS REGISTER
Register Address R/W Description Reset Value
CIPRSTATUS 0x4D80_0098 R Preview path status 0
CIPRSTATUS Bit Description Initial
State Change
State
OvFiCb_Pr [31] Overflow state of preview FIFO Cb 0 X
OvFiCr_Pr [30] Overflow state of preview FIFO Cr 0 X
Reserved [29:28] 0 X
FrameCnt_Pr [27:26] Frame count of preview DMA 0 X
Reserved [25] 0 X
FlipMd_Pr [24:23] Flip mode of preview DMA 0 X
Reserved [22] 0 X
ImgCptEn_
PrSC [21] Image capture enable of preview path 0 X
Reserved [20:0] 0 X
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-38
6.36 IMAGE CAPTURE ENABLE REGISTER
Register Address R/W Description Reset Value
CIIMGCPT 0x4D80_00A0 RW Image capture enable command 0
CIIMGCPT Bit Description Initial
State Change
State
ImgCptEn [31] camera interface global capture enable 0 O
ImgCptEn_
CoSc [30] capture enable for codec scaler. This bit must be zero in
scaler-bypass mode. 0 O
ImgCptEn_
PrSc (v)
[29] capture enable for preview scaler. (applied both Memory
data input path and External camera path in using preview)
This bit must be zero in scaler-bypass mode.
0 O
Reserved [28:27] 0 X
Cpt_CoDMA_
Sel
[26] Codec DMA output format
1 = RGB 16/24 bit (Must be Out422_Co=1 ,
Interleave_Co=1)
0 = YCbCr 4:2:2 or 4:2:0
0 O
Cpt_CoDMA_
RGBFMT
[25] Codec DMA RGB format
1 = RGB 24-bit
0 = RGB 16-bit
0 O
Cpt_CoDMA_
En
[24] Capture codec dma frame control. It is also used for start
signal of Codec image capture. Therefore, it must be set to
‘1’ if codec image is wanted. or it must be set to ‘0’ if codec
image is not captured.
1 = Enable
0 Disable
0 X
Cpt_CoDMA_
Ptr [23:19] Capture sequence turn-around pointer 0 X
Cpt_CoDMA_
Mod
[18] Capture codec dma mode
1 = Apply Cpt_CoDMA_Cnt mode (capture
Cpt_CoDMA_Cnt frames along the Cpt_CoDMA_Seq after
Cpt_CoDMA_En becomes high)
0 = Apply Cpt_CoDMA_En mode (capture frames along the
Cpt_CoDMA_Seq during Cpt_CoDMA_En is high)
0 X
Cpt_CoDMA_
Cnt
[17:10] Wanted number of frames to be captured (when read, you
will see the value of a shadow register which is
downcounted when a frame is captured. That is,
Cpt_CoDMA_Cnt has an initially loaded value still after a
frame is captured.)
0 X
Reserved [9:0] 0 X
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-39
6.37 CODEC CAPTURE SEQUENCE REGISTER
Register Address R/W Description Reset Value
CICOCPTSEQ 0x4D80_00A4 RW Codec DMA capture sequence related 0xFFFFFFFF
CICOCPTSEQ Bit Description Initial State
Cpt_CoDMA_Seq [31:0] Capture sequence pattern in Codec DMA 0xFFFF_FFFF
Cpt_CoDMA_Ptr
31 30 29 10Cpt_CoDMA_Seq[31:0]
Repeat
Capture Capture No
Capture Capture
1 1 1. . . . . . 0 10
Figure 23-19. Capture codec dma frame control
• For skipped frmes, IRQ_CI_c is not generated. And FrameCnt_co is not increased
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-40
6.38 CODEC SCAN LINE OFFSET REGISTER
Register Address R/W Description Reset Value
CICOSCYOS 0x4D80_00A8 RW Codec scan line Y offset related 0
CICOSCYOS Bit Description Initial
State Change
State
Reserved [31:29] 0 X
Initial_Yoffset_Co
[28:16] The number of the skipped pixels for initial offset (should
be even number for word boundary alignment). This
value must be set to 0 when scanline offset is not used.
And, scanline offset can be used only when
Interleave_Co is set to 1.
0 O
Reserved [15:13] 0 X
Line_Yoffset_Co
[12:0] The number of the skipped pixels in the screen of the
target image when scan line is changed (should be even
number for word boundary alignment). This value must
be set to 0 when scanline offset is not used. And,
scanline offset can be used only when Interleave_Co is
set to 1.
0 O
6.39 PREVIEW SCAN LINE OFFSET REGISTER
Register Address R/W Description Reset Value
CIPRSCOS 0x4D80_00AC RW Preview scan line offset related 0
CIPRSCOS Bit Description Initial
State Change
State
Reserved [31:29] 0 X
Initial_offset_Pr [28:16] The number of the skipped pixels for initial offset (should be
even number for word boundary alignment). This value
must be set to 0 when scanline offset is not used.
0 O
Reserved [15:13] 0 X
Line_offset_Pr
[12:0] The number of the skipped pixels in the screen of the target
image when scan line is changed (should be even number
for word boundary alignment). This value must be set to 0
when scanline offset is not used.
0 O
• Scan line offset is allowed all output format.
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-41
Target image
SCREEN
Initial offset
Line offset
Figure 23-20. Scan line offset
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-42
6.40 IMAGE EFFECTS REGISTER
Register Address R/W Description Reset Value
CIIMGEFF 0x4D80_00B0 RW Image Effects related 0010_0080
CIIMGEFF Bit Description Initial
State Change
State
Reserved [31:29] 0 X
FIN
[28:26] Image Effect selection
3’b000 : Bypass
3’b001 : Arbitrary Cb/Cr
3’b010 : Negative
3’b011 : Art Freeze
3’b100 : Embossing
3’b101 : Silhouette
0 O
Reserved [25:21] 0 X
PAT_Cb [20:13] It is used only for FIN is Arbitrary Cb/Cr
( PAT_Cb/Cr == 8’d128 for GRAYSCALE)
16 ≤ PAT_Cb ≤ 223
8’d128 O
Reserved [12:8] 0 X
PAT_Cr [7:0] It is used only for FIN is Arbitrary Cb/Cr
( PAT_Cb/Cr == 8’d128 for GRAYSCALE)
16 ≤ PAT_Cr ≤ 223
8’d128 O
Cf) sepia : PAT_Cb == 8’d115 , PAT_Cr == 8’d145
Original Arbitrary(sepia) Negative
Art freeze Embossing Silhouette
Figure 23-21. Image Effect Result
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-43
6.41 MSDMA Y START ADDRESS REGISTER
Register Address R/W Description Reset Value
CIMSYSA 0x4D80_00B4 RW MSDMA Y start address related 0000_0000
CIMSYSA Bit Description Initial
State Change
State
Reserved [31] 0 X
CIMSYSA (v) [30:0] DMA start address for Y component (YCbCr 4:2:0)
DMA start address for YCbCr component (interleave 4:2:2) 0 X
6.42 MSDMA CB START ADDRESS REGISTER
Register Address R/W Description Reset Value
CIMSCBSA 0x4D80_00B8 RW MSDMA Cb start address related 0000_0000
CIMSCBSA Bit Description Initial
State Change
State
Reserved [31] 0 X
CIMSCBSA (v) [30:0] DMA start address for Cb component (YCbCr 4:2:0) 0 X
6.43 MSDMA CR START ADDRESS REGISTER
Register Address R/W Description Reset Value
CIMSCRSA 0x4D80_00BC RW MSDMA Cr start address related 0000_0000
CIMSCRSA Bit Description Initial
State Change
State
Reserved [31] 0 X
CIMSCRSA (v) [30:0] DMA start address for Cr component (YCbCr 4:2:0) 0 X
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-44
6.44 MSDMA Y END ADDRESS REGISTER
Register Address R/W Description Reset Value
CIMSYEND 0x4D80_00C0 RW MSDMA Y end address related 0000_0000
CIMSYEND Bit Description Initial
State Change
State
Reserved [31] 0 X
CIMSYEND (v) [30:0] DMA End address for Y component (YCbCr 4:2:0)
DMA End address for YCbCr component (interleave 4:2:2) 0 X
6.45 MSDMA CB END ADDRESS REGISTER
Register Address R/W Description Reset Value
CIMSCBEND 0x4D80_00C4 RW MSDMA Cb end address related 0000_0000
CIMSCBEND Bit Description Initial
State Change
State
Reserved [31] 0 X
CIMSCBEND (v) [30:0] DMA End address for Cb component (YCbCr 4:2:0) 0 X
6.46 MSDMA CR END ADDRESS REGISTER
Register Address R/W Description Reset Value
CIMSCREND 0x4D80_00C8 RW MSDMA Cr end address related 0000_0000
CIMSCREND Bit Description Initial
State Change
State
Reserved [31] 0 X
CIMSCREND (v) [30:0] DMA End address for Cr component (YCbCr 4:2:0) 0 X
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-45
6.47 MSDMA Y OFFSET REGISTER
Register Address R/W Description Reset Value
CIMSYOFF 0x4D80_00CC RW MSDMA Y offset related 0000_0000
CIMSYOFF Bit Description Initial
State Change
State
Reserved [31:24] 0 X
CIMSYOFF (v) [23:0] Offset of Y component for fetching source image 0 X
6.48 MSDMA CB OFFSET REGISTER
Register Address R/W Description Reset Value
CIMSCBOFF 0x4D80_00D0 RW MSDMA Cb offset related 0000_0000
CIMSCBOFF Bit Description Initial
State Change
State
Reserved [31:24] 0 X
CIMSCBOFF (v) [23:0] Offset of Cb component for fetching source image 0 X
6.49 MSDMA CR OFFSET REGISTER
Register Address R/W Description Reset Value
CIMSCROFF 0x4D80_00D4 RW MSDMA Cr offset related 0000_0000
CIMSCROFF Bit Description Initial
State Change
State
Reserved [31:24] 0 X
CIMSCROFF (v) [23:0] Offset of Cr component for fetching source image 0 X
6.50 MSDMA SOURCE IMAGE WIDTH REGISTER
Register Address R/W Description Reset Value
CIMSWIDTH 0x4D80_00D8 RW MSDMA source image width related 0000_0000
CIMSWIDTH Bit Description Initial
State Change
State
Reserved [31:12] 0 X
CIMSWIDTH (v) [11:0] MSDMA source image horizontal pixel size (must be 8’s
multiple. It must be 4’s multiple of PreHorRatio. minimum
16)
0 X
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-46
6.50.1 - MSDMA Start address
Start address of ADDRStart_Y/Cb/Cr points the first word address where the corresponding component of
Y/Cb/Cr is read. Each one should be aligned with word boundary (i.e. ADDRStart_X[1:0] = 00). ADDRStart_Cb
and ADDRStart_Cr are valid only for the YCbCr420 source image format.
6.50.2 - MSDMA End address
1) ADDREnd_Y
= ADDRStart_Y + Memory size for the component of Y
= ADDRStart_Y + (SRC_Width × SRC_Height) × ByteSize_Per_Pixel + Offset_Y × (SRC_Height-1)
2) ADDREnd_Cb (Valid for YCbCr420 source format)
= ADDRStart_Cb + Memory size for the component of Cb
= ADDRStart_Cb + (SRC_Width/2 × SRC_Height/2) × ByteSize_Per_Pixel + Offset_Cb × (SRC_Height/2-1)
3) ADDREnd_ Cr (Valid for YCbCr420 source format)
= ADDRStart_ Cr + Memory size for the component of Cr
= ADDRStart_Cr + (SRC_Width/2 × SRC_Height/2) × ByteSize_Per_Pixel + Offset_Cr × (SRC_Height/2-1)
6.50.3 - MSDMA OFFSET
1) Offset_Y/Cb/Cr
= Memory size for offset per a horizontal line
= Number of pixel (or sample) in horizontal offset × ByteSize_Per_Pixel (or Sample)
Cf.) ByteSize_Per_Pixel = 1 for YCbCr420
2 for YCbCr422 (interleave)
S3C2450X RISC MICROPROCESSOR CAMERA INTERFACE
23-47
6.51 MSDMA CONTROL REGISTER
Register Address R/W Description Reset Value
CIMSCTRL 0x4D80_00D
C RW MSDMA control register 0000_0000
CIMSCTRL Bit Description Initial
State Chang
e State
Reserved [31:7] 0 X
EOF_MS
[6] MSDMA read the saved memory data.
When this operation done, EOF will be generated. (read
only)
0 X
Interleave_MS (v)
[5] 0 = Non-Interleaved format (Each component of Y, Cb
and Cr is access by the word).
1 = Interleaved format (All components of Y, Cb and Cr
are mixed inside single word).
0 X
Order422_MS (v)
[4:3] When source MSDMA image is interleaved YCbCr 4:2:2,
Interleaved YCbCr 4:2:2 input memory storing style.
[4:3] LSB MSB
00 Y0Cb0Y1Cr0
01 Y0Cr0Y1Cb0
10 Cb0Y0Cr0Y1
11 Cr0Y0Cb0Y1
0 X
SEL_DMA_CAM (v)
[2] Preview path data selection. codec path don’t care.
0 = External camera input path
1 = Memory data input path (MSDMA)
0 X
SRC420_MS (v)
[1] Source image format for MSDMA
0 = YCbCr 4:2:2 (interleaved)
1 = YCbCr 4:2:0 (Non-interleaved)
0 X
ENVID_MS (v)
[0] MSDMA operation start. Hardware doesn’t clear
automatically
(When triggered Low to High by software setting)
1) SEL_DMA_CAM = ‘0’ , ENVID_MS don’t care (using
external camera signal for preview path)
2) SEL_DMA_CAM = ‘1’, ENVID_MS is set (0Æ1) then
MSDMA operation start for preview. (external camera
signal is valid for only codec_path)
0 X
NOTE: ENVID_MS SFR must be set at last. Starting order for using MSDMA input path.
SEL_DMA_CAM (others SFR setting) Æ Image Capture Enable SFR setting Æ ENVID_MS SFR setting.
CAMERA INTERFACE S3C2450X RISC MICROPROCESSOR
23-48
ENVID_MS
startstart
0 ->1 setting 1 -> 0 setting 0 -> 1 setting
Figure 23-22. ENVID_MS SFR setting when DMA start to Read Memory Data
RGB start address,
Preview Target format,
Preview DMA Control
etc..
Operation Done
= EOF signal generation Operation Done
= IRQ signal generation
SFR SFR
Memory MSDMA Scaler Preview
DMA
MSDMA Start,End,OFFSET,
MSDMA Source image width,
MSDMA control
Figure 23-23. SFR & Operation (related each DMA when Selected MSDMA input path)
S3C2450X RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
24-1
24 ADC & TOUCH SCREEN INTERFACE
1 OVERVIEW
The 12-bit CMOS ADC (Analog to Digital Converter) is a recycling type device with 10-channel analog inputs. It
converts the analog input signal into 12-bit binary digital codes at a maximum conversion rate of 1MSPS with
5MHz A/D converter clock. A/D converter operates with on-chip sample-and-hold function and power down
(standby) mode is supported.
Touch screen interface can controls input pads (XP, XM, YP and YM) to obtain X/Y-positions on the external
touch screen device. Touch Screen Interface contains three main blocks; these are touch screen pads control
logic, ADC interface logic and interrupt generation logic.
1.1 FEATURES
• Resolution: 10-bit / 12-bit (controllable)
• Differential Linearity Error: ± 2.0 LSB
• Integral Linearity Error: ± 4.0 LSB
• Maximum Conversion Rate: 1 MSPS
• Low Power Consumption
• Power Supply Voltage: 3.3V
• Reference Voltage (VREF): 3.3V
• On-chip Sample-and-hold Function
• Normal Conversion Mode
• Separate X/Y position conversion Mode
• Auto (Sequential) X/Y Position Conversion Mode
• Waiting for Interrupt Mode
ADC AND TOUCH SCREEN INTERFACE S3C2450X RISC MICROPROCESSOR
24-2
2 ADC & TOUCH SCREEN INTERFACE OPERATION
2.1 BLOCK DIAGRAM
Figure 24-1 shows the functional block diagram of A/D converter and touch screen interface. Note that the A/D
converter device is a recycling type.
10:1
MUX
PULL_UP
XM_SEN
YM_SEN
XP_SEN
YP_SEN
Touch screen
pads control
A/D
Converter
ADC
interface
&
Touch
screen
control
ADC input
control
Interrupt
generation
SUBINT_ADC
SUBINT_TC
Waiting for interrupt
VDDA_ADC
VDDA_ADC
AIN9(XP)
AIN8(XM)
AIN7(YP)
AIN6(YM)
AIN[5:0]
VDDA_ADC
Figure 24-1. ADC and Touch Screen Interface Block Diagram
S3C2450X RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
24-3
2.2 FUNCTION DESCRIPTIONS
2.2.1 A/D Conversion Time
When the PCLK frequency is 50 MHz, the prescaler value is 49 and total 10-bit and 12-bit conversion time is
given:
A/D converter freq. = 50 MHz/(49+1) = 1 MHz
Conversion time = 1/(1MHz / (5cycles)) = 1/200 KHz = 5 us
NOTE
This A/D converter is designed to operate at maximum 5 MHz clock, so the conversion rate can go up to
1MSPS.
2.2.2 Touch Screen Interface Modes (AIN6 ~ AIN9)
1. Normal conversion mode (AUTO_PST = 0, XY_PST = 0)
The operation of this mode is identical with AIN0~AIN5’s. It can be initialized by setting the ADC Control
Register (ADCCON) and ADC touch screen control register (ADCTSC). All of the switches and pull-up
resister should be turned off (reset value 0x58 makes switches turn-off). The converted data can be read out
from ADC conversion data 0 register (ADCDAT0).
2. Separate X/Y position conversion mode (AUTO_PST = 0, XY_PST : contorl)
This mode consists of two states; one is X-position measurement state and the other is Y-position
measurement state.
X-position measurement state is operated as the following way; set XY_PST is ‘1’ and read out the converted
data (X-position) from ADCDAT0. The end of X-position conversion can be notified by interrupt (INT_ADC).
Y-position measurement state is operated as the following way; set XY_PST is ‘2’ and read out the converted
data (Y-position) from ADCDAT1. The end of Y-position conversion can be notified by interrupt (INT_ADC).
State XP XM YP YM
X-position measurement VDDA_ADC VSSA_ADC AIN7 Hi-z
Y-position measurement AIN9 Hi-z VDDA_ADC VSSA_ADC
3. Auto(Sequential) X/Y position conversion mode (AUTO_PST = 1, XY_PST = 0)
Auto (sequential) X/Y position conversion mode is operated as the following. Touch screen controller
sequentially converts X-position and Y-position that is touched. After touch screen controller converts X-
position data to ADCDAT0 and then converts Y-position data to ADCDAT1, Touch screen interface generates
interrupt (INT_ADC). The measurement states are automatically changed.
ADC AND TOUCH SCREEN INTERFACE S3C2450X RISC MICROPROCESSOR
24-4
4. Waiting for interrupt mode (ADCTSC = 0xd3)
Touch screen controller generates interrupt (INT_TC) signal when the stylus is down. The value of ADC touch
screen control register (ADCTSC) is ‘0xd3’; PULL_UP is ‘0’, XP_SEN is ‘1’, XM_SEN is ‘0’, YP_SEN is ‘1’ and
YM_SEN is ‘1’. Touch interrupt can be generated when stylus pen is down or up.
After touch screen controller generates interrupt signal (INT_TC), waiting for interrupt mode must be cleared.
(XY_PST sets to the No operation Mode)
Mode XP XM YP YM
Waiting for Interrupt Mode VDDA_ADC(Pull-up enable) Hi-z Hi-z VSSA_ADC
2.2.3 Standby Mode
Standby mode is activated when ADCCON [2] is set to '1'. In this mode, A/D conversion operation is halted and
ADCDAT0, ADCDAT1 register contains the previous converted data.
2.2.4 Programming Notes
1. The A/D converted data can be accessed by means of interrupt or polling method. With interrupt method,
the overall conversion time - from A/D converter start to converted data read - may be delayed because of
the return time of interrupt service routine and data access time. With polling method, by checking the
ADCCON[15] - end of conversion flag-bit, the read time from ADCDAT register can be determined.
2. A/D conversion can be activated in different way: After ADCCON[1] - A/D conversion start-by-read
mode-is set to 1, A/D conversion starts simultaneously whenever converted data is read.
Stylus Down
X-Conversion Y-Conversion
Stylus Up
AB C
= x (1/X-tal clock) or x (1/EXTCLK clock)
= x (1/PCLK clock) + 5 x (1/PCLK clock) x (PRSCVL+1)
= x (1/PCLK clock) + 5 x (1/PCLK clock) x (PRSCVL+1)
= Delay value of ADCDLY register
XP
YP
Figure 24-2. Timing Diagram in Auto (Sequential) X/Y Position Conversion Mode
S3C2450X RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
24-5
3 ADC AND TOUCH SCREEN INTERFACE SPECIAL REGISTERS
3.1 ADC CONTROL (ADCCON) REGISTER
Register Address R/W Description Reset Value
ADCCON 0x58000000 R/W ADC control register 0x3FC4
ADCCON Bit Description Initial State
ECFLG [15] End of conversion flag (read only).
0 = A/D conversion in process
1 = End of A/D conversion
0
PRSCEN [14] A/D converter prescaler enable.
0 = Disable
1 = Enable
0
PRSCVL [13:6] A/D converter prescaler value.
Data value: 5 ~ 255
Note that division factor is (N+1) when the prescaler value is N.
Note: ADC frequency should be set less than PCLK by 5 times.
(Ex. PCLK = 10MHz, ADC Frequency < 2MHz)
0xFF
Reserved [5:4] Reserved 0
RESSEL [3] A/D converter resolution selection
0 = 10-bit resolution
1 = 12-bit resolution
0
STDBM [2] Standby mode select.
0 = Normal operation mode
1 = Standby mode
1
READ_ START [1] A/D conversion starts by read.
0 = Disable start by read operation
1 = Enable start by read operation
0
ENABLE_
START [0] A/D conversion starts by setting this bit.
If READ_START is enabled, this value is not valid.
0 = No operation
1 = A/D conversion starts and this bit is cleared after the start-up.
0
ADC AND TOUCH SCREEN INTERFACE S3C2450X RISC MICROPROCESSOR
24-6
3.2 ADC TOUCH SCREEN CONTROL (ADCTSC) REGISTER
Register Address R/W Description Reset Value
ADCTSC 0x58000004 R/W ADC touch screen control register 0x058
ADCTSC Bit Description Initial State
UD_SEN [8] Select interrupt source Stylus Up or Down
0 = Detect Stylus Down Signal.
1 = Detect Stylus Up Signal.
0
YM_SEN [7] YM to GND Switch Enable
0 = Switch disable.(YM = AIN6, Hi-z)
1 = Switch enable.(YM = VSSA_ADC)
0
YP_SEN [6] YP to VDD Switch Enable
0 = Switch enable.(YP = VDDA_ADC)
1 = Switch disable.(YP = AIN7, Hi-z)
1
XM_SEN [5] XM to GND Switch Enable
0 = Switch disable.(XM = AIN8, Hi-z)
1 = Switch enable.(XM = VSSA_ADC)
0
XP_SEN [4] XP to VDD Switch Enable
0 = Switch enable.(XP = VDDA_ADC)
1 = Switch disable.(XP = AIN9, Hi-z)
1
PULL_UP [3] XP Pull-up Switch Enable
0 = XP pull-up enable.
1 = XP pull-up disable.
1
AUTO_PST [2] Automatically sequencing conversion of X-Position and Y-Position
0 = Normal ADC conversion.
1 = Auto measurement of X-position, Y-position.
0
XY_PST [1:0] Manually measurement of X-Position or Y-Position.
00 = No operation mode
01 = X-position measurement
10 = Y-position measurement
11 = Waiting for Interrupt Mode
0
NOTES:
1. While waiting for Touch screen Interrupt, XP_SEN bit should be set to ‘1’(XP Output disable)
and PULL_UP bit should be set to ‘0’(XP Pull-up enable).
2. AUTO_PST bit should be set ‘1’ only in Automatic (Sequential) X/Y Position conversion.
3. PULL_UP switche should be eabled during stop/sleep mode to avoid leakage current.
S3C2450X RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
24-7
3.3 ADC START DELAY (ADCDLY) REGISTER
Register Address R/W Description Reset Value
ADCDLY 0x58000008 R/W ADC start or interval delay register 0x00ff
ADCDLY Bit Description Initial State
DELAY [15:0] Incase of ADC conversion mode (Normal, Separate, Auto
conversion);
ADC conversion is delayed by counting this value. Counting clock is
PCLK.
In case of waiting for interrupt mode;
When stylus down occurs in waiting for interrupt mode, counts this
value and then generates Interrupt signal (INT_TC) for filtering noise.
Counting clock is external input clock (X-tal or EXTCLK).
Note: Do not use zero value (0x0000)
0x00ff
ADC AND TOUCH SCREEN INTERFACE S3C2450X RISC MICROPROCESSOR
24-8
3.4 ADC CONVERSION DATA (ADCDAT0) REGISTER
Register Address R/W Description Reset Value
ADCDAT0 0x5800000C R ADC conversion data register -
ADCDAT0 Bit Description Initial State
UPDOWN [15] Up or down state of Stylus at Waiting for Interrupt Mode.
0 = Stylus down state
1 = Stylus up state
-
AUTO_PST [14] Automatic sequencing conversion of X-position and
Y-position. (mirroring AUTO_PST in ADCTSC register)
0 = Normal ADC conversion
1 = Auto measurement of X-position, Y-position
-
XY_PST [13:12] Manual measurement of X-position or Y-position. (mirroring
XY_PST in ADCTSC register)
00 = No operation mode
01 = X-position measurement
10 = Y-position measurement
11 = Waiting for Interrupt Mode
-
XPDATA_12
(Normal ADC) [11:10] When A/D resolution is 12bit, X-position conversion MSB 2-bit
data value (include Normal ADC conversion data)
Data value(data [11:0]) = 0 ~ 0xFFF
-
XPDATA
(Normal ADC) [9:0] X-position conversion data value. (include Normal ADC
conversion data value)
Data value(data [9:0]) = 0 ~ 0x3FF
-
S3C2450X RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
24-9
3.5 ADC CONVERSION DATA (ADCDAT1) REGISTER
Register Address R/W Description Reset Value
ADCDAT1 0x58000010 R ADC conversion data register -
ADCDAT1 Bit Description Initial State
UPDOWN [15] Up or down state of Stylus at Waiting for Interrupt Mode.
0 = Stylus down state
1 = Stylus up state
-
AUTO_PST [14] Automatic sequencing conversion of X-position and
Y-position. (mirroring AUTO_PST in ADCTSC register)
0 = Normal ADC conversion
1 = Auto measurement of X-position, Y-position
-
XY_PST [13:12] Manual measurement of X-position or Y-position. (mirroring
XY_PST in ADCTSC register)
00 = No operation mode
01 = X-position measurement
10 = Y-position measurement
11 = Waiting for Interrupt Mode
-
YPDATA_12 [11:10] When A/D resolution is 12bit, X-position conversion MSB 2-bit
data value.
Data value(data [11:0]) = 0 ~ 0xFFF
YPDATA [9:0] Y-position conversion data value.
Data value(data [9:0]) = 0 ~ 0x3FF
-
3.6 ADC TOUCH SCREEN UP-DOWN INT CHECK REGISTER (ADCUPDN)
Register Address R/W Description Reset Value
ADCUPDN 0x5800014 R/W Stylus Up or Down Interrpt state register 0x0
ADCUPDN Bit Description Initial State
TSC_UP [1] Stylus Up Interrupt history. (After check, this bit should be cleared
manually)
0 = No stylus up state.
1 = Stylus up interrupt has been occurred.
0
TSC_DN [0] Stylus Down Interrupt history. (After check, this bit should be
cleared manually)
0 = No stylus down state.
1 = Stylus down interrupt has been occurred.
0
ADC AND TOUCH SCREEN INTERFACE S3C2450X RISC MICROPROCESSOR
24-10
3.7 ADC CHANNEL MUX REGISTER (ADCMUX)
Register Address R/W Description Reset Value
ADCMUX 0x5800018 R/W Analog input channel select 0x0
ADCMUX Bit Description Initial State
ADCMUX [3:0] Analog input channel select.
0000 = AIN 0
0001 = AIN 1
0010 = AIN 2
0011 = AIN 3
0100 = AIN 4
0101 = AIN 5
0110 = AIN 6 (YM)
0111 = AIN 7 (YP)
1000 = AIN8 (XM)
1001 = AIN9 (XP)
0
NOTE: When Touch Screen Pads(YM, YP, XM, XP) are disabled, these ports can be used as Analog input ports(AIN6,
AIN7, AIN8, AIN9) for ADC.
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-1
25 IIS-BUS INTERFACE
1 OVERVIEW
IIS (Inter-IC Sound) is one of the popular digital audio interface. The bus has only to handle audio data, while the
other signals, such as sub-coding and control, are transferred separately. Surely, it is possible to transmit data
between two IIS bus. To minimize the number of pins required and to keep wiring simple, basically, a 3-line serial
bus is used consisting of a line for two time-multiplexed data channels, a word select line and a clock line.
IIS interface transmits or receives sound data from external stereo audio codec. For transmitting and receiving
data, two 32x16 FIFOs (First-In-First-Out) data structures are included and DMA transfer mode for transmitting or
receiving samples can be supported. IIS-specific clock can be supplied from internal system clock controller
through IIS clock divider or direct clock source.
2 FEATURE
• 2-ch IIS-bus for audio interface with DMA-based operation
• Serial, 8/16/24 bit per channel data transfers
• Supports IIS, MSB-justified and LSB-justified data format
• 32-bit width 16depth Tx FIFO, 32-bit width 16depth Rx FIFO
3 SIGNALS
Name Direction Description
I2S1_LRCLK Input/Output IIS-Bus Audio channel select(word select) clock
I2S1_SCLK Input/Output IIS-Bus Audio serial clock(bit clock)
I2S1_CDCLK Input/Output IIS-Bus Audio Codec clock
I2S1_SDI Input IIS-Bus Audio serial data input
I2S1_SDO Output IIS-Bus Audio serial data output
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-2
4 BLOCK DIAGRAM
Register File
Figure 25-1. IIS-Bus Block Diagram
5 FUNCTIONAL DESCRIPTIONS
IIS interface consists of register bank, FIFOs, shift registers, clock control, DMA finite state machine, and channel
control block as shown in Figure 25-1. Note that each FIFO has 32-bit width and 16 depth structure, which
contains left/right channel data. So, FIFO access and data transfer are handled with left/right pair unit. Figure 25-1
shows the internal functional block diagram of IIS interface, for actual GPIO pad name, please refer prior page’s
SIGNALS table. For more detail guide of GPIO setting, please refer the GPIO chapter.
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-3
5.1 MASTER/SLAVE MODE
Master or slave mode can be chosen by setting IMS bit of IISMOD register. In master mode, I2SSCLK and
I2SLRCLK are generated internally and supplied to external device. Therefore a root clock is needed for
generating I2SSCLK and I2SLRzCLK by dividing. The IIS pre-scaler (clock divider) is employed for generating a
root clock with divided frequency from internal system clock(PCLK, divided EPLL clock , EPLLrefCLK) and
external I2S clock(from I2SCDCLK pad). The I2SSCLK and I2SLRCLK are supplied from the pin (GPIOs) in slave
mode.
Master/Slave mode is different with TX/RX. Master/Slave mode presents the direction of I2SLRCLK and
I2SSCLK. It doesn’t matter the direction of I2SCDCLK (This is only auxiliary.). At slave mode, I2SCDCLK can be
also going out for external IIS codec chip operation. If IIS bus interface transmits clock signals to IIS codec, IIS
bus is master mode. But if IIS bus interface receives clock signal from IIS codec, IIS bus is slave mode. TX/RX
mode indicates the direction of data flow. If IIS bus interface transmits data to IIS codec, this is TX mode.
Conversely, IIS bus interface receives data from IIS codec that is RX mode. Let’s distinguish Master/Slave mode
from TX/RX mode.
Figure 25-2 shows the route of the root clock with internal master(PCLK, divided EPLL clock , EPLLRefClock) or
external master(External I2S clock) mode setting in IIS clock control block and system controller. Note that RCLK
indicates root clock and this clock can be supplied to external IIS codec chip at internal master mode and slave
mode.(when CDCLKCON bit of IISMOD register is 1) At slave mode RCLK doesn’t affect to I2SSCLK and
I2SLRCLK, but for correct I2S functioning setting RFS, BFS are needed.
CLKAUDIO
PCLK
IMS
Pre-scaler
1/N
RCLK 1/M BCLKmaster
divided
EPLL clock
System
Controlller
IIS
CODCLKO
CDCLKCON
PAD
EPLL
RefCLK
External I2S Clock
I2SCDCLK
I2SAudioCLK
SELI2S
Figure 25-2. IIS Clock Control Block Diagram
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-4
5.1.1 DMA Transfer
In the DMA transfer mode, the transmitter or receiver FIFO are accessible by DMA controller. DMA service
request is activated internally by the transmitter or receiver FIFO state. The FTXEMPT, FRXEMPT, FTXFULL,
and FRXFULL bits of I2SCON register represent the transmitter or receiver FIFO data state. Especially,
FTXEMPT and FRXFULL bit are the ready flag for DMA service request; the transmit DMA service request is
activated when TXFIFO is not empty and the receiver DMA service request is activated when RXFIFO is not full.
The DMA transfer uses only handshaking method for single data. Note that during DMA acknowledge activation,
the data read or write operation should be performed.
* DMA request point
- TX mode : ( FIFO is not full ) & ( TXDMACTIVE is active )
- RX mode : ( FIFO is not empty ) & ( RXDMACTIVE is active )
NOTE: It only supports single transfer in DMA mode.
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-5
6 AUDIO SERIAL DATA FORMAT
6.1 IIS-BUS FORMAT
The IIS bus has four lines including serial data input I2SSDI, serial data output I2SSDO, left/right channel select
clock I2SLRCLK, and serial bit clock I2SSCLK; the device generating I2SLRCLK and I2SSCLK is the master.
Serial data is transmitted in 2's complement with the MSB first with a fixed position, whereas the position of the
LSB depends on the word length. The transmitter sends the MSB of the next word at one clock period after the
I2SLRCLK is changed. Serial data sent by the transmitter may be synchronized with either the trailing or the
leading edge of the clock signal. However, the serial data must be latched into the receiver on the leading edge of
the serial clock signal, and so there are some restrictions when transmitting data that is synchronized with the
leading edge.
The LR channel select line indicates the channel being transmitted. I2SLRCLK may be changed either on a
trailing or leading edge of the serial clock, but it does not need to be symmetrical. In the slave, this signal is
latched on the leading edge of the clock signal. The I2SLRCLK line changes one clock period before the MSB is
transmitted. This allows the slave transmitter to derive synchronous timing of the serial data that will be set up for
transmission. Furthermore, it enables the receiver to store the previous word and clear the input for the next word.
6.2 MSB (LEFT) JUSTIFIED
MSB-Justified (Left-Justified) format is similar to IIS bus format, except that in MSB-justified format, the transmitter
always sends the MSB of the next word at the same time whenever the I2SLRCLK is changed.
6.3 LSB (RIGHT) JUSTIFIED
LSB-Justified (Right-Justified) format is opposite to the MSB-justified format. In other word, the transferring serial
data is aligned with ending point of I2SLRCLK transition.
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-6
Figure 25-3 shows the audio serial format of IIS, MSB-justified, and LSB-justified. Note that in this figure, the word
length is 16 bit and I2SLRCLK makes transition every 24 cycle of I2SSCLK (BFS is 48 fs, where fs is sampling
frequency; I2SLRCLK frequency).
Figure 25-3. IIS Audio Serial Data Formats
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-7
6.4 SAMPLING FREQUENCY AND MASTER CLOCK
Master clock frequency (RCLK) can be selected by sampling frequency as shown in Table 25-1. Because RCLK
is made by IIS pre-scaler, the pre-scaler value and RCLK type (256fs or 384fs or 512fs or 768fs) should be
determined properly.
Table 25-1. CODEC clock (CODECLK = 256fs, 384fs, 512fs, 768fs)
IISLRCK
(fs)
8.000
kHz
11.025
kHz
16.000
kHz
22.050
kHz
32.000
kHz
44.100
kHz
48.000
kHz
64.000
kHz
88.200
kHz
96.000
kHz
256fs
2.0480 2.8224 4.0960 5.6448 8.1920 11.2896 12.2880 16.3840 22.5792 24.5760
384fs
CODECLK 3.0720 4.2336 6.1440 8.4672 12.2880 16.9344 18.4320 24.5760 33.8688 36.8640
(MHz) 512fs
4.0960 5.6448 8.1920 11.2900 16.3840 22.5790 24.5760 32.7680 45.1580 49.1520
768fs
6.1440 8.4672 12.2880 16.9340 24.5760 33.8690 36.8640 49.1520 - -
NOTE: fs represents sampling frequency.
CODECLK Frequency = fs * (256 or 384 or 512 or 768)
6.5 IIS CLOCK MAPPING TABLE
On selecting BFS, RFS, and BLC bits of I2SMOD register, user should refer to the following table. Table 25-2
shows the allowable clock frequency mapping relations.
Table 25-2. IIS Clock Mapping Table
RFS
Clock Frequency 256 fs (00B) 512 fs (01B) 384 fs (10B) 768 fs (11B)
16 fs (10B) (a) (a) (a) (a)
24 fs (11B) - - (a) (a)
32 fs (00B) (a) (b) (a) (b) (a) (b) (a) (b)
BFS
48 fs (01B) - - (a) (b) (c) (a) (b) (c)
Descriptions
(a) Allowed when BLC is 8-bit (01B)
(b) Allowed when BLC is 16-bit (00B)
(c) Allowed when BLC is 24-bit (10B)
NOTE: Bit Clock Frequency ≥ fs * (bit length * 2). Under this condition Bit Clock Frequency can be one of among fs * (16 or
24 or 32 or 48). The codec clock is a multiple of the bit clock among fs * (256 or 384 or 512 or 768)
Example : If bit length is 16 bit, Bit Clock Frequency ≥ fs * 32. So it can be one of fs * (32 or 48).
If Bit Clock Frequency is 48 fs, then 384fs(48 fs* 8) and 768fs(48 fs * 16) are the clock which is a
multiple of the Bit Clock Frequency.
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-8
7 PROGRAMMING GUIDE
The IIS bus interface can be accessed either by the processor using programmed I/O instructions or by the DMA
controller.
7.1 INITIALIZATION
1. Before you use IIS bus interface, you have to configure GPIOs to IIS mode. And check signal’s direction.
I2SLRCLK, I2SSCLK and I2SCDCLK is inout-type. The each of I2SSDI and I2SSDO is input and output.
2. Now then, you choose clock source. S3C2450 has four clock sources. Those are PCLK, divided EPLL clock
EPLLRefCLK and external codec. If you want to know more detail, refer Figure 25-2.
7.2 PLAY MODE (TX MODE) WITH DMA
1. TXFIFO is flushed before operation. If you don’t distinguish Master/Slave mode from TX/RX mode, you must
study Master/Slave mode and TX/RX mode. Refer Master/Slave chapter.
2. To configure I2SMOD register and I2SPSR (IIS pre-scaler register) properly.
3. To operate system in stability, the internal TXFIFO should be almost full before transmission. First of all, DMA
starts because of that reason.
4. Basically, IIS bus doesn’t support the interrupt. So, you can only check state by polling through accessing
SFR.
5. If TXFIFO is full, now then you make I2SACTIVE be asserted.
7.3 RECORDING MODE (RX MODE) WITH DMA
1. RXFIFO is flushed before operation. Also, if you don’t distinguish between Master/Slave mode and TX/RX
mode, you must study Master/Slave mode and TX/RX mode. Refer Master/Slave chapter.
2. To configure I2SMOD register and I2SPSR (IIS pre-scaler register) properly.
3. To operate system in stability, the internal RXFIFO should have at least one data before DMA operation.
Because of that reason, you make I2SACTIVE be asserted.
4. Now then you check RXFIFO state by polling through accessing SFR.
5. If RXFIFO is not empty, let’s start RXDMACTIVE.
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-9
7.4 EXAMPLE CODE
TX CHANNEL
The I2S TX channel provides a single stereo compliant output. The transmit channel can operate in master or
Slave mode. Data is transferred between the processor and the I2S controller via an APB access or a DMA
access.
The processor must write words in multiples of two (i.e. for left and right audio sample).The words are serially
shifted out timed with respect to the audio serial bitclk, SCLK and word select clock, LRCLK.
TX Channel has 16X32 bit wide FIFO where the processor or DMA can write upto 16 left/right data samples After
enabling the channel for transmission.
An Example sequence is as the following.
Ensure the PCLK and CLKAUDIO are coming correctly to the I2S controller and FLUSH the TX FIFO using the
TFLUSH bit in the Please ensure that I2S Controller is configured in one of the following modes.
• TX only mode
• TX/RX simultaneous mode
This can be done by programming the TXR bit in the I2SMOD Register (I2S Mode Register).
1. Then Program the following parameters according to the need
• IMS
• SDF
• BFS
• BLC
• LRP
For Programming, the above-mentioned fields please refer I2SMOD Register (I2S Mode Register).
2. Once ensured that the input clocks for I2S controller are up and running and step 1 and 2 have been
completed we can write to TX FIFO.
The write to the TX FIFO has to be carried out thorough the I2STXD Register (I2S TX FIFO Register)
This 32 bit data will occupy position 0 of the FIFO and any further data will be written to position 2, 3 and so on.
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-10
The Data is aligned in the TX FIFO for 8-bits/channel or 16-bits/channel BLC as shown
RIGHT CHANNEL LEFT CHANNEL LOC 0
LOC 1
LOC 2
LOC 3
LOC 4
LOC 5
LOC 6
LOC 7
LOC 8
LOC 9
LOC 10
LOC 11
LOC 12
LOC 13
LOC 14
LOC 15
015 7
BLC=00
BLC=01
16
31
BLC=00
BLC=01
23
Figure 25-4. TX FIFO Structure for BLC = 00 or BLC = 01
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-11
The Data is aligned in the TX FIFO for 24-bits/channel BLC as shown
Figure 25-5. TX FIF0 Structure for BLC = 10 (24-bits/channel)
Once the data is written to the TX FIFO the TX channel can be made active by enabling the I2SACTIVE bit in the
I2SCON Register (I2S Control Register).
The data is then serially shifted out with respect to the bit clock SCLK and word select clock LRCLK.
The TXCHPAUSE in the I2SCON Register (I2S Control Register) can stop the serial data transmission on the
I2SSDO.The transmission is stopped once the current Left/Right channel is transmitted.
If the control registers in the I2SCON Register (I2S Control Register) and I2SMOD Register (I2S Mode Register)
are to be reprogrammed then it is advisable to disable the TX channel.
If the TX channel is enabled while the FIFO is empty, no samples are read from the FIFO.
The Status of TX FIFO can be checked by checking the bits in the I2SFIC Register (I2S FIFO Control
Register).
LOC 0
LOC 1
LOC 2
LOC 3
LOC 4
LOC 5
LOC 6
LOC 7
LOC 8
LOC 9
LOC 10
LOC 11
LOC 12
LOC 13
LOC 14
LOC 15
BLC = 10
(
24-bits/channel
)
02331
LEFT CHANNEL
RIGHT CHANNEL
LEFT CHANNEL
RIGHT CHANNEL
INVALID
INVALID
INVALID
INVALID
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-12
RX CHANNEL
The I2S RX channel provides a single stereo compliant output. The receive channel can operate in master or
slave mode. Data is received from the input line and transferred into the RX FIFO. The processor can then read
this data via an APB read or a DMA access can access this data.
RX Channel has a 16X32 bit wide RX FIFO where the processor or DMA can read upto 16 left/right data samples
after enabling the channel for reception.
An Example sequence is as following.
Ensure the PCLK and CLKAUDIO are coming correctly to the I2S controller and FLUSH the RX FIFO using the
RFLUSH bit in the I2SFIC Register (I2S FIFO Control Register) and the I2S controller is configured in any of the
modes
• Receive only.
• Receive/Transmit simultaneous mode
This can be done by Programming the TXR bit in the I2SMOD Register (I2S Mode Register)
1. Then Program the following parameters according to the need
• IMS
• SDF
• BFS
• BLC
• LRP
For Programming, the above mentioned fields please refer I2SMOD Register (I2S Mode Register)
2. Once ensured that the input clocks for I2S controller are up and running and step 1 and 2 have been
completed user must put the I2SACTIVE high to enable any reception of data, the I2S Controller receives
data on the LRCLK change.
The Data must be read from the RX FIFO using the I2SRXD Register (I2S RX FIFO Register) only after looking
at the RX FIFO count in the I2SFIC Register (I2S FIFO Control Register). The count would only increment
once the complete left channel and right have been received.
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-13
The Data is aligned in the RX FIFO for 8-bits/channel or 16-bits/channel BLC as shown
RIGHT CHANNEL LEFT CHANNEL
Figure 25-6. RX FIFO Structure for BLC = 00 or BLC = 01
LOC 0
LOC 1
LOC 2
LOC 3
LOC 4
LOC 5
LOC 6
LOC 7
LOC 8
LOC 9
LOC 10
LOC 11
LOC 12
LOC 13
LOC 14
LOC 15
0
15 7
BLC=00
BLC=01
16
31
BLC=00
BLC=01
23
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-14
The Data is aligned in the RX FIFO for 24-bits/channel BLC as shown
Figure 25-7. RX FIF0 Structure for BLC = 10 (24-bits/channel)
The RXCHPAUSE in the I2SCON register can stop the serial data reception on the I2SSDI.The reception is
stopped once the current Left/Right channel is received If the control registers in the I2SCON Register (I2S
Control Register)and I2SMOD Register (I2S Mode Register) are to be reprogrammed then it is advisable to
disable the RX channel.
The Status of RX FIFO can be checked by checking the bits in the I2SFIC Register (I2S FIFO Control Register).
LOC 0
LOC 1
LOC 2
LOC 3
LOC 4
LOC 5
LOC 6
LOC 7
LOC 8
LOC 9
LOC 10
LOC 11
LOC 12
LOC 13
LOC 14
LOC 15
BLC = 10
(
24-bits/channel
)
0 2331
LEFT CHANNEL
RIGHT CHANNEL
LEFT CHANNEL
RIGHT CHANNEL
INVALID
INVALID
INVALID
INVALID
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-15
8 IIS-BUS INTERFACE SPECIAL REGISTERS
Table 25-3. Register Summary of IIS Interface
Register Address R/W Description Reset Value
IISCON 0x55000100 R/W IIS interface control register 0x600
IISMOD 0x55000104 R/W IIS interface mode register 0x0
IISFIC 0x55000108 R/W IIS interface FIFO control register 0x0
IISPSR 0x5500010C R/W IIS interface clock divider control register 0x0
IISTXD 0x55000110 W IIS interface transmit data register 0x0
IISRXD 0x55000114 R IIS interface receive data register 0x0
NOTE: All registers of IIS interface are accessible by word unit with STR/LDR instructions.
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-16
8.1 IIS CONTROL REGISTER (IISCON)
Register Address Description Reset Value
IISCON 0x55000100 IIS interface control register 0x0000_0600
IISCON Bit R/W Description
[31:18] R/W
Reserved. Program to zero.
FTXURSTATUS [17] R/W
TX FIFO under-run interrupt status. And this is used by interrupt clear
bit. When this is high, you can do interrupt clear by writing ‘1’.
0 = Interrupt didn’t be occurred.
1 = Interrupt was occurred.
FTXURINTEN [16] R/W
TX FIFO Under-run Interrupt Enable
0 = TXFIFO Under-run INT disable
1 = TXFIFO Under-run INT enable1)
[15:12] R/W
Reserved. Program to zero.
LRI [11] R
Left/Right channel clock indication. Note that LRI meaning is dependent
on the value of LRP bit of I2SMOD register.
0 = Left (when LRP bit is low) or right (when LRP bit is high)
1 = Right (when LRP bit is low) or left (when LRP bit is high)
FTXEMPT [10] R
Tx FIFO empty status indication.
0 = FIFO is not empty (ready for transmit data to channel)
1 = FIFO is empty (not ready for transmit data to channel)
FRXEMPT [9] R
Rx FIFO empty status indication.
0 = FIFO is not empty
1 = FIFO is empty
FTXFULL [8] R
Tx FIFO full status indication.
0 = FIFO is not full
1 = FIFO is full
FRXFULL [7] R
Rx FIFO full status indication.
0 = FIFO is not full (ready for receive data from channel)
1 = FIFO is full (not ready for receive data from channel)
TXDMAPAUSE [6] R/W
Tx DMA operation pause command. Note that when this bit is activated
at any time, the DMA request will be halted after current on-going DMA
transfer is completed.
0 = No pause DMA operation
1 = Pause DMA operation
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-17
IISCON Bit R/W Description
RXDMAPAUSE [5] R/W
Rx DMA operation pause command. Note that when this bit is activated
at any time, the DMA request will be halted after current on-going DMA
transfer is completed.
0 = No pause DMA operation
1 = Pause DMA operation
TXCHPAUSE [4] R/W
Tx channel operation pause command. Note that when this bit is
activated at any time, the channel operation will be halted after left-right
channel data transfer is completed.
0 = No pause operation
1 = Pause operation
RXCHPAUSE [3] R/W
Rx channel operation pause command. Note that when this bit is
activated at any time, the channel operation will be halted after left-right
channel data transfer is completed.
0 = No pause operation
1 = Pause operation
TXDMACTIVE [2] R/W
Tx DMA active (start DMA request). Note that when this bit is set from
high to low, the DMA operation will be forced to stop immediately.
0 = Inactive
1 = Active
RXDMACTIVE [1] R/W
Rx DMA active (start DMA request). Note that when this bit is set from
high to low, the DMA operation will be forced to stop immediately.
0 = Inactive
1 = Active
I2SACTIVE [0] R/W
IIS interface active (start operation).
0 = Inactive
1 = Active
NOTE: When playing is finished, Under-run interrupt will be occurring. (Since no more data are written into TXFIFO at the end
of playing.) User can stop transmission at this Under-run interrupt.
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
25-18
8.2 IIS MODE REGISTER (IISMOD)
Register Address Description Reset Value
IISMOD 0x55000104 IIS interface mode register 0x0000_0000
IISMOD Bit R/W Description
[31:15] R/W
Reserved. Program to zero.
BLC [14:13] R/W
Bit Length Control Bit Which decides transmission of 8/16 bits per audio
channel
00 =16 Bits per channel
01 = 8 Bits Per Channel
10 = 24 Bits Per Channel
11 = Reserved
CDCLKCON [12] R/W
Determine direction of codec clock(I2SCDCLK)
0 = Supply codec clock to external codec chip.
(from PCLK, EPLL, EPLLRefCLK)
1 = Get codec clock from external codec chip. (to CLKAUDIO)
(Refer to Figure 25-2)
IMS [11:10] R/W IIS master or slave mode select. (and select source of codec clock)
00 = Master mode
(PCLK is source clock for I2SSCLK, I2SLRCLK, I2SCDCLK)
01 = Master mode
(CLKAUDIO is source clock for I2SSCLK, I2SLRCLK.
CLKAUDIO-EPLL, EPLLRefCLK is source clock for I2SCDCLK)
10 = Slave mode (PCLK is source clock for I2SCDCLK)
11 = Slave mode
(CLKAUDIO-EPLL, EPLLRefCLK is source clock for I2SCDCLK)
(Refer to Figure 25-2)
TXR [9:8] R/W
Transmit or receive mode select.
00 = Transmit only mode
01 = Receive only mode
10 = Transmit and receive simultaneous mode
11 = Reserved
LRP [7] R/W
Left/Right channel clock polarity select.
0 = Low for left channel and high for right channel
1 = High for left channel and low for right channel
SDF [6:5] R/W
Serial data format.
00 = IIS format
01 = MSB-justified (left-justified) format
10 = LSB-justified (right-justified) format
11 = Reserved
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-19
IISMOD Bit R/W Description
RFS [4:3] R/W
IIS root clock (codec clock) frequency select.
00 = 256 fs, where fs is sampling frequency
01 = 512 fs
10 = 384 fs
11 = 768 fs
(Even in the slave mode, this bit should be set for correct)
BFS [2:1] R/W
Bit clock frequency select.
00 = 32 fs, where fs is sampling frequency
01 = 48 fs
10 = 16 fs
11 = 24 fs
(Even in the slave mode, this bit should be set for correct)
[0] R/W
Reserved. Program to zero.
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
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8.3 IIS FIFO CONTROL REGISTER (IISFIC)
Register Address Description Reset Value
IISFIC 0x55000108 IIS interface FIFO control register 0x0000_0000
IISFIC Bit R/W Description
[31:16] R/W
Reserved. Program to zero.
TFLUSH [15] R/W
TX FIFO flush command.
0 = No flush
1 = Flush
[14:13] R/W
Reserved. Program to zero.
FTXCNT [12:8] R
TX FIFO data count. (0~16)
RFLUSH [7] R/W
RX FIFO flush command.
0 = No flush
1 = Flush
[6:5] R/W
Reserved. Program to zero.
FRXCNT [4:0] R
RX FIFO data count. (0~16)
NOTE: Tx FIFOs, Rx FIFO has 32-bit width and 16 depth structure, so FIFO data count value ranges from 0 to 16.
8.4 IIS PRESCALER CONTROL REGISTER (IISPSR)
Register Address Description Reset Value
IISPSR 0x5500010C IIS interface clock divider control register 0x0000_0000
IISPSR Bit R/W Description
[31:16] R/W
Reserved. Program to zero.
PSRAEN [15] R/W Pre-scaler (Clock divider) active.
1 = Active (divide I2SAudioCLK with Pre-scaler division value)
0 = Inactive (bypass I2SAudioCLK) (Refer to Figure 25-2)
[14] R/W Reserved. Program to zero.
PSVALA [13:8] R/W Pre-scaler (Clock divider) division value.
N = Division factor is N+1 (1~1/64)
[7:0] R/W Reserved. Program to zero.
S3C2450X RISC MICROPROCESSOR IIS-BUS INTERFACE
25-21
8.5 IIS TRANSMIT REGISTER (IISTXD)
Register Address Description Reset Value
IISTXD 0x55000110 IIS interface transmit data register 0x0000_0000
IISTXD Bit R/W Description
IISTXD [31:0] W
TX FIFO write data. Note that the left/right channel data is allocated as
the following bit fields.
R[23:0], L[23:0] when 24-bit BLC
R[31:16], L[15:0] when 16-bit BLC
R[23:16], L[7:0] when 8-bit BLC
8.6 IIS RECEIVE REGISTER (IISRXD)
Register Address Description Reset Value
IISRXD 0x55000114 IIS interface receive data register 0x0000_0000
IISRXD Bit R/W Description
IISRXD [31:0] R
RX FIFO read data. Note that the left/right channel data is allocated as
the following bit fields.
R[23:0], L[23:0] when 24-bit BLC
R[31:16], L[15:0] when 16-bit BLC
R[23:16], L[7:0] when 8-bit BLC
IIS-BUS INTERFACE S3C2450X RISC MICROPROCESSOR
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NOTES
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-1
26 IIS MULTI AUDIO INTERFACE
1 OVERVIEW
IIS (Inter-IC Sound) is one of the popular digital audio interface. The bus has only to handle audio data, while the
other signals, such as sub-coding and control, are transferred separately. Surely, it is possible to transmit data
between two IIS bus. To minimize the number of pins required and to keep wiring simple, basically, a 3-line serial
bus is used consisting of a line for two time-multiplexed data channels, a word select line and a clock line.
IIS interface transmits or receives sound data from external stereo audio codec. For transmitting and receiving
data, three 32x16 TXFIFOs(First-In-First-Out) and one 32x16 RXFIFO data structures are included and DMA
transfer mode for transmitting or receiving samples can be supported. IIS-specific clock can be supplied from
internal system clock controller through IIS clock divider or direct clock source.
2 FEATURE
• Up to 5.1ch IIS-bus for audio interface with DMA-based operation
• Serial, 8/16/24 bit per channel data transfers
• Supports IIS, MSB-justified and LSB-justified data format
• Three 32-bit width 16 depth Tx FIFOs, One 32-bit width 16 depth Rx FIFO
3 SIGNALS
Name Direction Description
I2SLRCLK Input/Output IIS Multi Audio channel select(word select) clock
I2SSCLK Input/Output IIS Multi Audio serial clock(bit clock)
I2SCDCLK Input/Output IIS Multi Audio Codec clock
I2SSDI Input IIS Multi Audio serial data input
I2SSDO Output IIS Multi Audio serial data output 0
I2SSDO_1 Output IIS Multi Audio serial data output 1
I2SSDO_2 Output IIS Multi Audio serial data output 2
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-2
4 BLOCK DIAGRAM
Figure 26-1. IIS-Bus Block Diagram
5 FUNCTIONAL DESCRIPTIONS
IIS interface consists of register bank, FIFOs, shift registers, clock control, DMA finite state machine, and channel
control block as shown in Figure 26-1. Note that each FIFO has 32-bit width and 16 depth structure, which
contains left/right channel data. So, FIFO access and data transfer are handled with left/right pair unit. Figure 26-1
shows the internal functional block diagram of IIS interface, for actual GPIO pad name, please refer prior page’s
SIGNALS table. For more detail guide of GPIO setting, please refer the GPIO chapter.
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-3
5.1 MASTER/SLAVE MODE
Master or slave mode can be chosen by setting IMS bit of IISMOD register. In master mode, I2SSCLK and
I2SLRCLK are generated internally and supplied to external device. Therefore a root clock is needed for
generating I2SSCLK and I2SLRCLK by dividing. The IIS pre-scaler (clock divider) is employed for generating a
root clock with divided frequency from internal system clock(PCLK, divided EPLL clock , EPLLrefCLK) and
external I2S clock(from I2SCDCLK pad). The I2SSCLK and I2SLRCLK are supplied from the pin (GPIOs) in slave
mode.
Master/Slave mode is different with TX/RX. Master/Slave mode presents the direction of I2SLRCLK and
I2SSCLK. It doesn’t matter the direction of I2SCDCLK (This is only auxiliary.) At slave mode, I2SCDCLK can be
also going out for external IIS codec chip operation. If IIS bus interface transmits clock signals to IIS codec, IIS
bus is master mode. But if IIS bus interface receives clock signal from IIS codec, IIS bus is slave mode. TX/RX
mode indicates the direction of data flow. If IIS bus interface transmits data to IIS codec, this is TX mode.
Conversely, IIS bus interface receives data from IIS codec that is RX mode. Let’s distinguish Master/Slave mode
from TX/RX mode.
Figure 26-2 shows the route of the root clock with internal master(PCLK, divided EPLL clock , EPLLRefClock) or
external master(External I2S clock) mode setting in IIS clock control block and system controller. Note that RCLK
indicates root clock and this clock can be supplied to external IIS codec chip at internal master mode and slave
mode.(when CDCLKCON bit of IISMOD register is 1). At slave mode RCLK doesn’t affect to I2SSCLK and
I2SLRCLK, but for correct I2S functioning setting RFS, BFS are needed.
Figure 26-2. IIS Clock Control Block Diagram
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-4
5.2 DMA TRANSFER
In the DMA transfer mode, the transmitter or receiver FIFO are accessible by DMA controller. DMA service
request is activated internally by the transmitter or receiver FIFO state. The FTXEMPT, FRXEMPT, FTXFULL,
and FRXFULL bits of I2SCON register represent the transmitter or receiver FIFO data state. Especially,
FTXEMPT and FRXFULL bit are the ready flag for DMA service request; the transmit DMA service request is
activated when TXFIFO is not empty and the receiver DMA service request is activated when RXFIFO is not full.
The DMA transfer uses only handshaking method for single data. Note that during DMA acknowledge activation,
the data read or write operation should be performed.
* DMA request point
- TX mode : ( FIFO is not full ) & ( TXDMACTIVE is active )
- RX mode : ( FIFO is not empty ) & ( RXDMACTIVE is active )
NOTE
It only supports single transfer in DMA mode.
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-5
6 AUDIO SERIAL DATA FORMAT
6.1 IIS-BUS FORMAT
The IIS bus has four lines including serial data input I2SSDI, serial data output I2SSDO, left/right channel select
clock I2SLRCLK, and serial bit clock I2SSCLK; the device generating I2SLRCLK and I2SSCLK is the master.
Serial data is transmitted in 2's complement with the MSB first with a fixed position, whereas the position of the
LSB depends on the word length. The transmitter sends the MSB of the next word at one clock period after the
I2SLRCLK is changed. Serial data sent by the transmitter may be synchronized with either the trailing or the
leading edge of the clock signal. However, the serial data must be latched into the receiver on the leading edge of
the serial clock signal, and so there are some restrictions when transmitting data that is synchronized with the
leading edge.
The LR channel select line indicates the channel being transmitted. I2SLRCLK may be changed either on a
trailing or leading edge of the serial clock, but it does not need to be symmetrical. In the slave, this signal is
latched on the leading edge of the clock signal. The I2SLRCLK line changes one clock period before the MSB is
transmitted. This allows the slave transmitter to derive synchronous timing of the serial data that will be set up for
transmission. Furthermore, it enables the receiver to store the previous word and clear the input for the next word.
6.2 MSB (LEFT) JUSTIFIED
MSB-Justified (Left-Justified) format is similar to IIS bus format, except that in MSB-justified format, the transmitter
always sends the MSB of the next word at the same time whenever the I2SLRCLK is changed.
6.3 LSB (RIGHT) JUSTIFIED
LSB-Justified (Right-Justified) format is opposite to the MSB-justified format. In other word, the transferring serial
data is aligned with ending point of I2SLRCLK transition.
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-6
Figure 26-3 shows the audio serial format of IIS, MSB-justified, and LSB-justified. Note that in this figure, the word
length is 16 bit and I2SLRCLK makes transition every 24 cycle of I2SSCLK (BFS is 48 fs, where fs is sampling
frequency; I2SLRCLK frequency).
Figure 26-3. IIS Audio Serial Data Formats
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-7
6.4 SAMPLING FREQUENCY AND MASTER CLOCK
Master clock frequency (RCLK) can be selected by sampling frequency as shown in Table 26-1. Because RCLK
is made by IIS pre-scaler, the pre-scaler value and RCLK type (256fs or 384fs or 512fs or 768fs) should be
determined properly.
Table 26-1. CODEC clock (CODECLK = 256fs, 384fs, 512fs, 768fs)
IISLRCK
(fs)
8.000
kHz
11.025
kHz
16.000
kHz
22.050
kHz
32.000
kHz
44.100
kHz
48.000
kHz
64.000
kHz
88.200
kHz
96.000
kHz
256fs
2.0480 2.8224 4.0960 5.6448 8.1920 11.2896 12.2880 16.3840 22.5792 24.5760
384fs
CODECLK 3.0720 4.2336 6.1440 8.4672 12.2880 16.9344 18.4320 24.5760 33.8688 36.8640
(MHz) 512fs
4.0960 5.6448 8.1920 11.2900 16.3840 22.5790 24.5760 32.7680 45.1580 49.1520
768fs
6.1440 8.4672 12.2880 16.9340 24.5760 33.8690 36.8640 49.1520 - -
NOTE: fs represents sampling frequency.
CODECLK Frequency = fs * (256 or 384 or 512 or 768)
6.5 IIS CLOCK MAPPING TABLE
On selecting BFS, RFS, and BLC bits of I2SMOD register, user should refer to the following table. Table 26-2
shows the allowable clock frequency mapping relations.
Table 26-2. IIS Clock Mapping Table
RFS
Clock Frequency 256 fs (00B) 512 fs (01B) 384 fs (10B) 768 fs (11B)
16 fs (10B) (a) (a) (a) (a)
24 fs (11B) - - (a) (a)
32 fs (00B) (a) (b) (a) (b) (a) (b) (a) (b)
BFS
48 fs (01B) - - (a) (b) (c) (a) (b) (c)
Descriptions
(a) Allowed when BLC is 8-bit (01B)
(b) Allowed when BLC is 16-bit (00B)
(c) Allowed when BLC is 24-bit (10B)
NOTE: Bit Clock Frequency ≥ fs * (bit length * 2). Under this condition Bit Clock Frequency can be one of among fs * (16 or
24 or 32 or 48). The codec clock is a multiple of the bit clock among fs * (256 or 384 or 512 or 768)
Example: If bit length is 16 bit, Bit Clock Frequency ≥ fs * 32. So it can be one of fs * (32 or 48).
If Bit Clock Frequency is 48 fs, then 384fs(48 fs* 8) and 768fs(48 fs * 16) are the clock which is a
multiple of the Bit Clock Frequency.
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-8
7 PROGRAMMING GUIDE
The IIS bus interface can be accessed either by the processor using programmed I/O instructions or by the DMA
controller.
7.1 INITIALIZATION
1. Before you use IIS bus interface, you have to configure GPIOs to IIS mode. And check signal’s direction.
I2SLRCLK, I2SSCLK and I2SCDCLK is inout-type. The each of I2SSDI and I2SSDO is input and output.
2. Now then, you choose clock source. S3C2450 has four clock sources. Those are PCLK, divided EPLL clock
EPLLRefCLK and external codec. If you want to know more detail, refer Figure 26-2.
7.2 PLAY MODE (TX MODE) WITH DMA
1. TXFIFO is flushed before operation. If you don’t distinguish Master/Slave mode from TX/RX mode, you must
study Master/Slave mode and TX/RX mode. Refer Master/Slave chapter.
2. To configure I2SMOD register and I2SPSR (IIS pre-scaler register) properly.
3. To operate system in stability, the internal TXFIFO should be almost full before transmission. First of all, DMA
starts because of that reason.
4. Basically, IIS bus doesn’t support the interrupt. So, you can only check state by polling through accessing
SFR.
5. If TXFIFO is full, now then you make I2SACTIVE be asserted.
7.3 RECORDING MODE (RX MODE) WITH DMA
1. RXFIFO is flushed before operation. Also, if you don’t distinguish between Master/Slave mode and TX/RX
mode, you must study Master/Slave mode and TX/RX mode. Refer Master/Slave chapter.
2. To configure I2SMOD register and I2SPSR (IIS pre-scaler register) properly.
3. To operate system in stability, the internal RXFIFO should have at least one data before DMA operation.
Because of that reason, you make I2SACTIVE be asserted.
4. Now then you check RXFIFO state by polling through accessing SFR.
5. If RXFIFO is not empty, let’s start RXDMACTIVE.
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-9
7.4 EXAMPLE CODE
TX CHANNEL
The I2S TX channel provides single/double/tripple stereo compliant outputs. The transmit channel can operate
in master or Slave mode. Data is transferred between the processor and the I2S controller via an APB access or a
DMA access.
The processor must write words in multiples of two (i.e. for left and right audio sample).The words are serially
shifted out timed with respect to the audio serial BITCLK, SCLK and word select clock, LRCLK.
TX Channel has 16X32 bit wide FIFO where the processor or DMA can write UPTO 16 left/right data samples
after enabling the channel for transmission.
An Example sequence is as the following.
Ensure the PCLK and CLKAUDIO are coming correctly to the I2S controller and FLUSH the TX FIFO using the
TFLUSH bit in the I2SFIC Register (I2S FIFO Control Register).
Please ensure that I2S Controller is configured in one of the following modes.
• TX only mode
• TX/RX simultaneous mode
This can be done by programming the TXR bit in the I2SMOD Register (I2S Mode Register).
1. Then Program the following parameters according to the need
• IMS
• SDF
• BFS
• BLC
• LRP
For Programming, the above-mentioned fields please refer I2SMOD Register (I2S Mode Register).
2. Once ensured that the input clocks for I2S controller are up and running and step 1 and 2 have been
completed we can write to TX FIFO.
The write to the TX FIFO has to be carried out thorough the I2STXD Register (I2S TX FIFO Register)
This 32 bit data will occupy position 0 of the FIFO and any further data will be written to position 2, 3 and so on.
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-10
The Data is aligned in the TX FIFO for 8-bits/channel or 16-bits/channel BLC as shown
RIGHT CHANNEL LEFT CHANNEL
Figure 26-4. TX FIFO Structure for BLC = 00 or BLC = 01
LOC 0
LOC 1
LOC 2
LOC 3
LOC 4
LOC 5
LOC 6
LOC 7
LOC 8
LOC 9
LOC 10
LOC 11
LOC 12
LOC 13
LOC 14
LOC 15
0
15 7
BLC=00
BLC=01
16
31
BLC=00
BLC=01
23
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-11
The Data is aligned in the TX FIFO for 24-bits/channel BLC as shown
Figure 26-5. TX FIF0 Structure for BLC = 10 (24-bits/channel)
Once the data is written to the TX FIFO the TX channel can be made active by enabling the I2SACTIVE bit in the
I2SCON Register (I2S Control Register).
The data is then serially shifted out with respect to the serial bit clock SCLK and word select clock LRCLK.
The TXCHPAUSE in the I2SCON Register (I2S Control Register) can stop the serial data transmission on the
I2SSDO.The transmission is stopped once the current Left/Right channel is transmitted.
If the control registers in the I2SCON Register (I2S Control Register) and I2SMOD Register (I2S Mode
Register) are to be reprogrammed then it is advisable to disable the TX channel.
If the TX channel is enabled while the FIFO is empty, no samples are read from the FIFO.
The Status of TX FIFO can be checked by checking the bits in the I2SFIC Register (I2S FIFO Control
Register).
LOC 0
LOC 1
LOC 2
LOC 3
LOC 4
LOC 5
LOC 6
LOC 7
LOC 8
LOC 9
LOC 10
LOC 11
LOC 12
LOC 13
LOC 14
LOC 15
BLC = 10
(
24-bits/channel
)
023 31
LEFT CHANNEL
RIGHT CHANNEL
LEFT CHANNEL
RIGHT CHANNEL
INVALID
INVALID
INVALID
INVALID
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-12
RX CHANNEL
The I2S RX channel provides a single stereo compliant output. The receive channel can operate in master or
slave mode. Data is received from the input line and transferred into the RX FIFO. The processor can then read
this data via an APB read or a DMA access can access this data.
RX Channel has a 16X32 bit wide RX FIFO where the processor or DMA can read UPTO 16 left/right data
samples after enabling the channel for reception.
An Example sequence is as following.
Ensure the PCLK and CLKAUDIO are coming correctly to the I2S controller and FLUSH the RX FIFO using the
RFLUSH bit in the I2SFIC Register (I2S FIFO Control Register) and the I2S controller is configured in any of the
modes
• Receive only.
• Receive/Transmit simultaneous mode
This can be done by Programming the TXR bit in the I2SMOD Register (I2S Mode Register)
1. Then Program the following parameters according to the need
• IMS
• SDF
• BFS
• BLC
• LRP
For Programming, the above mentioned fields please refer I2SMOD Register (I2S Mode Register)
2. Once ensured that the input clocks for I2S controller are up and running and step 1 and 2 have been
completed user must put the I2SACTIVE high to enable any reception of data, the I2S Controller receives
data on the LRCLK change.
The Data must be read from the RX FIFO using the I2SRXD Register (I2S RX FIFO Register) only after looking at
the RX FIFO count in the I2SFIC Register (I2S FIFO Control Register). The count would only increment
once the complete left channel and right have been received.
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-13
The Data is aligned in the RX FIFO for 8-bits/channel or 16-bits/channel BLC as shown
RIGHT CHANNEL LEFT CHANNEL
Figure 26-6. RX FIFO Structure for BLC = 00 or BLC = 01
LOC 0
LOC 1
LOC 2
LOC 3
LOC 4
LOC 5
LOC 6
LOC 7
LOC 8
LOC 9
LOC 10
LOC 11
LOC 12
LOC 13
LOC 14
LOC 15
0
15 7
BLC=00
BLC=01
16
31
BLC=00
BLC=01
23
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-14
The Data is aligned in the RX FIFO for 24-bits/channel BLC as shown
Figure 26-7. RX FIF0 Structure for BLC = 10 (24-bits/channel)
The RXCHPAUSE in the I2SCON register can stop the serial data reception on the I2SSDI.The reception is
stopped once the current Left/Right channel is received. If the control registers in the I2SCON Register (I2S
Control Register) and I2SMOD Register (I2S Mode Register) are to be reprogrammed then it is advisable to
disable the RX channel.
The Status of RX FIFO can be checked by checking the bits in the I2SFIC Register (I2S FIFO Control Register).
LOC 0
LOC 1
LOC 2
LOC 3
LOC 4
LOC 5
LOC 6
LOC 7
LOC 8
LOC 9
LOC 10
LOC 11
LOC 12
LOC 13
LOC 14
LOC 15
BLC = 10
(
24-bits/channel
)
0 2331
LEFT CHANNEL
RIGHT CHANNEL
LEFT CHANNEL
RIGHT CHANNEL
INVALID
INVALID
INVALID
INVALID
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-15
8 IIS-BUS INTERFACE SPECIAL REGISTERS
Table 26-3. Register Summary of IIS Interface
Register Address R/W Description Reset Value
IISCON 0x55000000 R/W IIS interface control register 0xC600
IISMOD 0x55000004 R/W IIS interface mode register 0x0
IISFIC 0x55000008 R/W IIS interface FIFO control register 0x0
IISPSR 0x5500000C R/W IIS interface clock divider control register 0x0
IISTXD 0x55000010 W IIS interface transmit data register 0x0
IISRXD 0x55000014 R IIS interface receive data register 0x0
NOTE: All registers of IIS interface are accessible by word unit with STR/LDR instructions.
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-16
8.1 IIS CONTROL REGISTER (IISCON)
Register Address Description Reset Value
IISCON 0x55000000 IIS interface control register 0x0000_C600
IISCON Bit R/W Description
Reserved [31:18] R/W
Reserved. Program to zero.
FTXURSTATUS [17] R/W
TX FIFO under-run interrupt status. And this is used by interrupt clear
bit. When this is high, you can do interrupt clear by writing ‘1’.
0 = Interrupt didn’t be occurred.
1 = Interrupt was occurred.
FTXURINTEN [16] R/W
TX FIFO Under-run Interrupt Enable
0 = TXFIFO Under-run INT disable
1 = TXFIFO Under-run INT enable 1)
FTX2EMPT [15] R
TX FIFO2 empty Status Indication
0 = TX FIFO2 is not empty(Ready to transmit Data)
1 = TX FIFO2 is empty (Not Ready to transmit Data)
FTX1EMPT [14] R
TX FIFO1 empty Status Indication
0 = TX FIFO1 is not empty(Ready to transmit Data)
1 = TX FIFO1 is empty (Not Ready to transmit Data)
FTX2FULL [13] R
TX FIFO2 full Status Indication
0 = TX FIFO2 is not full
1 = TX FIFO2 is full
FTX1FULL [12] R
TX FIFO1 full Status Indication
0 = TX FIFO1 is not full
1 = TX FIFO1 is full
LRI [11] R
Left/Right channel clock indication. Note that LRI meaning is
dependent on the value of LRP bit of I2SMOD register.
0 = Left (when LRP bit is low) or right (when LRP bit is high)
1 = Right (when LRP bit is low) or left (when LRP bit is high)
FTX0EMPT [10] R
Tx FIFO0 empty status indication.
0 = FIFO is not empty (ready for transmit data to channel)
1 = FIFO is empty (not ready for transmit data to channel)
FRXEMPT [9] R
Rx FIFO empty status indication.
0 = FIFO is not empty
1 = FIFO is empty
FTX0FULL [8] R
Tx FIFO0 full status indication.
0 = FIFO is not full
1 = FIFO is full
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-17
IISCON Bit R/W Description
FRXFULL [7] R
Rx FIFO full status indication.
0 = FIFO is not full (ready for receive data from channel)
1 = FIFO is full (not ready for receive data from channel)
TXDMAPAUSE [6] R/W
Tx DMA operation pause command. Note that when this bit is activated
at any time, the DMA request will be halted after current on-going DMA
transfer is completed.
0 = No pause DMA operation
1 = Pause DMA operation
RXDMAPAUSE [5] R/W
Rx DMA operation pause command. Note that when this bit is activated
at any time, the DMA request will be halted after current on-going DMA
transfer is completed.
0 = No pause DMA operation
1 = Pause DMA operation
TXCHPAUSE [4] R/W
Tx channel operation pause command. Note that when this bit is
activated at any time, the channel operation will be halted after left-right
channel data transfer is completed.
0 = No pause operation
1 = Pause operation
RXCHPAUSE [3] R/W
Rx channel operation pause command. Note that when this bit is
activated at any time, the channel operation will be halted after left-right
channel data transfer is completed.
0 = No pause operation
1 = Pause operation
TXDMACTIVE [2] R/W
Tx DMA active (start DMA request). Note that when this bit is set from
high to low, the DMA operation will be forced to stop immediately.
0 = Inactive
1 = Active
RXDMACTIVE [1] R/W
Rx DMA active (start DMA request). Note that when this bit is set from
high to low, the DMA operation will be forced to stop immediately.
0 = Inactive
1 = Active
I2SACTIVE [0] R/W
IIS interface active (start operation).
0 = Inactive
1 = Active
NOTE: When playing is finished, Under-run interrupt will be occurring. (Since no more data are written into TXFIFO at the end
of playing.) User can stop transmission at this Under-run interrupt.
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-18
8.2 IIS MODE REGISTER (IISMOD)
Register Address Description Reset Value
IISMOD 0x55000004 IIS interface mode register 0x0000_0000
IISMOD Bit R/W Description
Reserved [31:15] R/W Reserved. Program to zero.
CDD2 [21:20] R/W
Channel-2 Data Discard. Discard means zero padding. It only supports
8/16 bit mode.
00 = No Discard
01 = I2STXD[15:0] Discard
10 = I2STXD[31:16] Discard
11 = Reserved
CDD1 [19:18] R/W
Channel-1 Data Discard. Discard means zero padding. It only supports
8/16 bit mode.
00 = No Discard
01 = I2STXD[15:0] Discard
10 = I2STXD[31:16] Discard
11 = Reserved
DCE [17:16] R/W
Data Channel Enable.
[17] = SD2 channel enable
[16] = SD1 channel enable
[15] R/W Reserved, Program to Zero
BLC [14:13] R/W
Bit Length Control Bit Which decides transmission of 8/16 bits per
audio channel
00 = 16 Bits per channel
01 = 8 Bits Per Channel
10 = 24 Bits Per Channel
11 = Reserved
CDCLKCON [12] R/W
Determine direction of codec clock(I2SCDCLK)
0 = Supply codec clock to external codec chip.
(from PCLK, EPLL, EPLLRefCLK)
1 = Get codec clock from external codec chip. (to CLKAUDIO)
(Refer to Figure 26-2)
IMS [11:10] R/W IIS master or slave mode select. (and select source of codec clock)
00 = Master mode
(PCLK is source clock for I2SSCLK, I2SLRCLK, I2SCDCLK)
01 = Master mode
(CLKAUDIO is source clock for I2SSCLK, I2SLRCLK.
CLKAUDIO-EPLL, EPLLRefCLK is source clock for I2SCDCLK)
10 = Slave mode (PCLK is source clock for I2SCDCLK)
11 = Slave mode
(CLKAUDIO-EPLL, EPLLRefCLK is source clock for I2SCDCLK)
(Refer to Figure 26-2)
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-19
IISMOD Bit R/W Description
TXR [9:8] R/W
Transmit or receive mode select.
00 = Transmit only mode
01 = Receive only mode
10 = Transmit and receive simultaneous mode
11 = Reserved
LRP [7] R/W
Left/Right channel clock polarity select.
0 = Low for left channel and high for right channel
1 = High for left channel and low for right channel
SDF [6:5] R/W
Serial data format.
00 = IIS format
01 = MSB-justified (left-justified) format
10 = LSB-justified (right-justified) format
11 = Reserved
RFS [4:3] R/W
IIS root clock (codec clock) frequency select.
00 = 256 fs, where fs is sampling frequency
01 = 512 fs
10 = 384 fs
11 = 768 fs
(Even in the slave mode, this bit should be set for correct)
BFS [2:1] R/W
Bit clock frequency select.
00 = 32 fs, where fs is sampling frequency
01 = 48 fs
10 = 16 fs
11 = 24 fs
(Even in the slave mode, this bit should be set for correct)
[0] R/W
Reserved. Program to zero.
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-20
8.3 IIS FIFO CONTROL REGISTER (IISFIC)
Register Address Description Reset Value
IISFIC 0x55000008 IIS interface FIFO control register 0x0000_0000
IISFIC Bit R/W Description
[31:29] R/W Reserved. Program to zero.
FTX2CNT [28:24] R TX FIFO2 data count. (0 ~ 16)
[23:21] R/W Reserved. Program to zero.
FTX1CNT [20:16] R TX FIFO1 data count. (0~16)
TFLUSH [15] R/W TX FIFO flush command.
0 = No flush
1 = Flush
[14:13] R/W Reserved. Program to zero.
FTX0CNT [12:8] R TX FIFO0 data count. (0~16)
RFLUSH [7] R/W RX FIFO flush command.
0 = No flush
1 = Flush
[6:5] R/W Reserved. Program to zero.
FRXCNT [4:0] R RX FIFO data count. (0~16)
NOTE: Tx FIFOs, Rx FIFO has 32-bit width and 16 depth structure, so FIFO data count value ranges from 0 to 16.
8.4 IIS PRESCALER CONTROL REGISTER (IISPSR)
Register Address Description Reset Value
IISPSR 0x5500000C IIS interface clock divider control register 0x0000_0000
IISPSR Bit R/W Description
[31:16] R/W Reserved. Program to zero.
PSRAEN [15] R/W Pre-scaler (Clock divider) active.
1 = Active (divide I2SAudioCLK with Pre-scaler division value)
0 = Inactive (bypass I2SAudioCLK) (Refer to Figure 26-2)
[14] R/W Reserved. Program to zero.
PSVALA [13:8] R/W Pre-scaler (Clock divider) division value.
N: Division factor is N+1 (1~1/64)
[7:0] R/W Reserved. Program to zero.
S3C2450X RISC MICROPROCESSOR IIS MULTI AUDIO INTERFACE
26-21
8.5 IIS TRANSMIT REGISTER (IISTXD)
Register Address Description Reset Value
IISTXD 0x55000010 IIS interface transmit data register 0x0000_0000
IISTXD Bit R/W Description
IISTXD [31:0] W
TX FIFO write data. Note that the left/right channel data is allocated as
the following bit fields.
R[23:0], L[23:0] when 24-bit BLC
R[31:16], L[15:0] when 16-bit BLC
R[23:16], L[7:0] when 8-bit BLC
8.6 IIS RECEIVE REGISTER (IISRXD)
Register Address Description Reset Value
IISRXD 0x55000014 IIS interface receive data register 0x0000_0000
IISRXD Bit R/W Description
IISRXD [31:0] R
RX FIFO read data. Note that the left/right channel data is allocated as
the following bit fields.
R[23:0], L[23:0] when 24-bit BLC
R[31:16], L[15:0] when 16-bit BLC
R[23:16], L[7:0] when 8-bit BLC
S3C2450X RISC MICROPROCESSOR S3C2450X RISC MICROPROCESSOR
26-22
NOTES
S3C2450X RISC MICROPROCESSOR AC97 CONTROLLER
27-1
27 AC97 CONTROLLER
1 OVERVIEW
The AC97 Controller Unit of the S3C2450 supports the AC97 revision 2.0 features. AC97 Controller
communicates with AC97 Codec using audio controller link (AC-link). Controller sends the stereo PCM data to
Codec. The external digital-to-analog converter (DAC) in the Codec then converts the audio sample to an analog
audio waveform. Also, Controller receives the stereo PCM data and the mono Mic data from Codec then store in
memories. This chapter describes the programming model for the AC97 Controller Unit. The information in this
chapter requires an understanding of the AC97 revision 2.0 specifications.
1.1 FEATURE
• Independent channels for stereo PCM In(Slot3, Slot4), mono MIC In(Slot 6), stereo PCM Out(Slot3, Slot4).
• DMA-based operation and interrupt based operation.
• All of the channels support only 16-bit samples.
• Variable sampling rate AC97 Codec interface (48kHz and below)
• 16-bit, 16 entry FIFOs per channel
• Only primary Codec support
1.2 SIGNALS
Name Direction Description
AC_nRESET Output Active-low CODEC reset.
AC_BIT_CLK Input 12.288MHz bit-rate clock
AC_SYNC Output 48 kHz frame indicator and synchronizer
AC_SDO Output Serial audio output data.
AC_SDI Input Serial audio input data.
AC97 CONTROLLER S3C2450X RISC MICROPROCESSOR
27-2
2 AC97 CONTROLLER OPERATION
This section explains the AC97 controller operation. Also it says to program guide. You must study AC-Link,
Power-down sequence and Wake-up sequence.
2.1 BLOCK DIAGRAM
Figure 27-1 shows the functional block diagram of S3C2450 AC97 Controller. The AC97 signals form the AC-link,
which is a point-to-point synchronous serial inter-connecting that supports full-duplex data transfers. All digital
audio streams and command/status information are communicated over the AC-link.
APB
I/F
DMA
Engine
Interrupt
Control
MIC in
FIFO
PCM
out FIFO
PCM in
FIFO
SFR
AC-link
I/F
FSM & Control
APB
AC-link
Figure 27-1. AC97 Block Diagram
S3C2450X RISC MICROPROCESSOR AC97 CONTROLLER
27-3
2.2 INTERNAL DATA PATH
Figure 27-2 shows the internal data path of S3C2450 AC97 Controller. It has stereo Pulse Code Modulated
(PCM) In, Stereo PCM Out and mono Mic-in buffers, which consist of 16-bit, 16 entries buffer. It also has 20-bit
I/O shift register via AC-link.
Command Addr
Register
(Slot 1)
Command Data
Register
(Slot 2)
PCM Out Buffer
(Regfile 16 bit x
2 x 16 Entry)
(Slot 3, Slot4)
PWDATA
Response Data
Register
(Slot 2)
Mic In Buffer
(RegFile 16 bit
x16 Entry)
(Slot 6)
PCM In Buffer
(Regfile 16 bit x
2 x 16 Entry)
(Slot 3, 4)
PRDATA
Input
Shift
Register
(20 bit)
Output
Shift
Register
(20 bit)
SDATA_IN
SDATA_OUT
AC-Link
APB
Figure 27-2. Internal Data Path
AC97 CONTROLLER S3C2450X RISC MICROPROCESSOR
27-4
3 OPERATION FLOW CHART
When you initialize the AC97 controller, you must assert system reset or cold reset. Because we don’t know the
previous state of the external the AC97 audio-codec. This assumes that GPIO is already ready. Then you make
codec ready interrupt enable. You can check codec ready interrupt by polling or interrupt. When interrupt is
occurred, you must de-assert codec ready interrupt. Now then you can transmit data from memory to register, or
from register to memory by using DMA or PIO(directly to write data to register). If internal FIFOs (TX FIFO or RX
FIFO) is not empty, then let data be transmitted. In addition, you can previously turn on AC-Link.
System reset or Cold reset
Set GPIO and Release
INTMSK/SUBINTMSK bits
Enable Codec Ready interrupt
Codec Ready interrupt ?
Time out condition ?
Disable Codec Ready interrupt
DMA operation or
PIO (Interrupt or Polling) operation
Yes
No
Controller off
No
Figure 27-3. AC97 Operation Flow Chart
S3C2450X RISC MICROPROCESSOR AC97 CONTROLLER
27-5
4 AC-LINK DIGITAL INTERFACE PROTOCOL
Each AC97 Codec incorporates a five-pin digital serial interface that links it to the S3C2450 AC97 Controller. AC-
link is a full-duplex, fixed-clock, PCM digital stream. It employs a time division multiplexed (TDM) scheme to
handle control register accesses and multiple input and output audio streams. The AC-link architecture divides
each audio frame into 12 outgoing and 12 incoming data streams. Each stream has 20-bit sample resolution and
requires a DAC and an analog-to-digital converter (ADC) with a minimum 16-bit resolution.
SYNC
SDATA_OUT
SDATA_IN
Slot #
TAG CMD
ADDR CMD
DATA PCM PCM RSRVD
TAG STATUS
ADDR STATUS
DATA PCM
LEFT PCM
RIGHT
0123456789101112
RSRVDRSRVDRSRVDRSRVDRSRVDRSRVDRSRVD
RSRVD RSRVD RSRVD RSRVD RSRVD RSRVD RSRVD
PCM
MIC
LEFT RIGHT
TAG
Phase
Data
Phase
Figure 27-4. Bi-directional AC-link Frame with Slot Assignments
Figure 27-4 shows the slot definitions that the S3C2450 AC97 Controller supports. The S3C2450 AC97 Controller
provides synchronization for all data transaction on the AC-link.
A data transaction is made up of 256 bits of information broken up into groups of 13 time slots and is called a
frame. Time slot 0 is called the Tag Phase and is 16 bits long. The other 12 time slots are called the Data Phase.
The Tag Phase contains one bit that identifies a valid frame and 12 bits that identify the time slots in the Data
Phase that contain valid data. Each time slot in the Data Phase is 20 bits long. A frame begins when SYNC goes
high. The amount of time that SYNC is high corresponds to the Tag Phase. AC97 frames occur at fixed 48 kHz
intervals and are synchronous to the 12.288 MHz bit rate clock, BITCLK. The controller and the Codec use the
SYNC and BITCLK to determine when to send transmit data and when to sample received data. A transmitter
transitions the serial data stream on each rising edge of BITCLK and a receiver samples the serial data stream on
falling edges of BITCLK. The transmitter must tag the valid slots in its serial data stream. The valid slots are
tagged in slot 0. Serial data on the AC-link is ordered most significant bit (MSB) to least significant bit (LSB). The
Tag Phase’s first bit is bit 15 and the first bit of each slot in Data Phase is bit 19. The last bit in any slot is bit 0.
AC97 CONTROLLER S3C2450X RISC MICROPROCESSOR
27-6
4.1 AC-LINK OUTPUT FRAME (SDATA_OUT)
Slot 0: Tag Phase
In slot 0, the first bit is a bit (SDATA_OUT, bit 15) which represents the validity of the entire frame. If bit 15 is a 1,
the current frame contains at least a valid time slot. The next 12 bit positions correspond each 12 time slot
contains valid data. Bits 0 and 1 of slot 0 are used as CODEC IO bits for I/O reads and writes to the CODEC
registers as described in the next section. In this way, data streams of differing sample rate can be transmitted
across AC-link at its fixed 48kHz audio frame rate.
Slot 1: Command Address Port
In slot 1, it communicates control register address and write/read command information to the AC97 controller.
When software accesses the primary CODEC, the hardware configures the frame as follows :
• In slot 0, the valid bit for 1, 2 slots are set.
• In slot 1, bit 19 is set (read) or clear(write). Bits 18-12 (of slot 1) are configured to specify the index to the
CODEC register. Others are filled with 0’s(reserved).
• In slot 2, it configured with the data which is for writing because of output frame.
Slot 2: Command Data Port
In slot 2, this is the write data with 16-bit resolution.([19:4] is valid data)
Slot 3: PCM Playback Left channel
Slot 3 which is audio output frame is the composite digital audio left stream. If a sample has a resolution that is
less than 16 bits, the AC97 controller fills all training non-valid bit positions in the slot with zeroes.
Slot 4: PCM Playback Right channel
Slot 4 which is audio output frame is the composite digital audio right stream. If a sample has a resolution that is
less than 16 bits, the AC97 controller fills all training non-valid bit positions in the slot with zeroes.
SDATA_OUT
BIT_CLK
SYNC AC '97 samples SYNC assertion here
AC '97 Controller samples first SDATA_OUT bit of frame here
END of previous Audio Frame
Valid
Frame Slot(1) Slot(2) Slot(12) "0" "0"
(ID1) "0"
(ID0) 19 0
Tag Phase Data Phase
19 0
START of Data phase
Slot# 1
END of Data Frame
Slot# 12
48KHz
12.288MHz
Figure 27-5. AC-link Output Frame
S3C2450X RISC MICROPROCESSOR AC97 CONTROLLER
27-7
4.2 AC-LINK INPUT FRAME (SDATA_IN)
Slot 0: Tag Phase
In slot 0, the first bit is a bit (SDATA_OUT, bit 15) that indicates whether the AC97 controller is in the CODEC
ready state. If the CODEC Ready bit is a 0, the AC97 controller is not ready for normal operation. This condition is
normal after the power is de-asserted on reset and the AC97 controller voltage references are settling.
Slot 1: Status Address Port/SLOTREQ bits
The status port monitors the status for the AC97 controller functions including, but not limited to, mixer settings
and power management. Audio input frame slot 1s stream echoes the control register index for the data to be
returned in slot 2, if the controller tags slots 1 and 2 as valid during slot 0. The controller only accepts status data
if the accompanying status address matches the last valid command address issued during the most recent read
command. For multiple sample rate output, the CODEC examines its sample-rate control registers, its FIFOs’
states, and the incoming SDATA_OUT tag bits at the beginning of each audio output frame to determine which
SLOTREQ bits to set active (low). SLOTREQ bits asserted during the current audio input frame indicate which
output slots require data from the controller in the next audio output frame. For fixed 48 kHz operation, the
SLOTREQ bits are set active (low), and a sample is transferred each frame. For multiple sample-rate input, the
“tag” bit for each input slot indicates whether valid data is present.
Table 27-1. Input Slot 1 Bit Definitions
Bit Description
19 RESERVED (Filled with zero)
18-12 Control register index (Filled with zeroes if AC97 tags is invalid)
11 Slot 3 request : PCM Left channel
10 Slot 4 request : PCM Right channel
9 Slot 5 request : NA
8 Slot 6 request : MIC channel
7 Slot 7 request : NA
6 Slot 8 request : NA
5 Slot 9 request : NA
4 Slot 10 request : NA
3 Slot 11 request : NA
2 Slot 12 request : NA
1, 0 RESERVED (Filled with zero)
Slot 2: Status Data Port
In slot 2, this is the status data with 16-bit resolution.([19:4] is valid data)
Slot 3: PCM Record Left channel
Slot 3 which is audio input frame is the left channel audio output of the AC97 Codec. If a sample has a resolution
that is less than 16 bits, the AC97 Codec fills all training non-valid bit positions in the slot with zeroes.
AC97 CONTROLLER S3C2450X RISC MICROPROCESSOR
27-8
Slot 4: PCM Right channel audio
Slot 4 which is audio input frame is the right channel audio output of the AC97 Codec. If a sample has a resolution
that is less than 16 bits, the AC97 Codec fills all training non-valid bit positions in the slot with zeroes.
Slot 6: Microphone Record Data
The AC97 Controller only supports 16-bit resolution for the MIC-in channel.
SDATA_OUT
BIT_CLK
SYNC
AC '97 samples SYNC assertion here
AC '97 Controller samples first SDATA_IN bit of frame here
END of previous Audio Frame
Codec
Ready Slot(1) Slot(2) Slot(12) "0" "0" "0" 19 0
Tag Phase Data Phase
19 0
START of Data phase
Slot# 1
END of Data Frame
Slot# 12
Figure 27-6. AC-link Input Frame
S3C2450X RISC MICROPROCESSOR AC97 CONTROLLER
27-9
5 AC97 POWER-DOWN
For details, please refer the AC-Link Power Managerment part of AC97 revision 2.0 specification.
SDATA_OUT
SDATA_IN
BIT_CLK
SYNC
slot 12
prev.frame Write to
0X26
slot 12
prev.frame
TAG
TAG
Data
PR4
Figure 27-7. AC97 Power-down Timing
5.1.1 Powering Down the AC-link
The AC-link signals enter a low power mode when the AC97 Codec Power-down register (0x26) bit PR4 is set to
a 1 (by writing 0x1000). Then the Primary Codec drives both BITCLK and SDATA_IN to a logic low voltage level.
The sequence follows the timing diagram shown in Figure 27-7.
The AC97 Controller transmits the write to Power-down register (0x26) over the AC-link. Set up the AC97
Controller so that it does not transmit data to slots 3-12 when it writes to the Power-down register bit PR4 (data
0x1000), and it does not require the Codec to process other data when it receives a power down request. When
the Codec processes the request it immediately transitions BITCLK and SDATA_IN to a logic low level. The AC97
Controller drives SYNC and SDATA_OUT to a logic low level after programming the AC_GLBCTRL register.
5.1.2 Waking up the AC-link - Wake Up Triggered by the AC97 Controller
AC-link protocol provides for a cold AC97 reset and a warm AC97 reset. The current power-down state ultimately
dictates which AC97 reset is used. Registers must stay in the same state during all power-down modes unless a
cold AC97 reset is performed. In a cold AC97 reset, the AC97 registers are initialized to their default values. After
a power down, the AC-link must wait for a minimum of four audio frame times after the frame in which the power
down occurred before it can be reactivated by reasserting the SYNC signal. When AC-link powers up, it indicates
readiness through the Codec ready bit (input slot 0, bit 15).
AC97 CONTROLLER S3C2450X RISC MICROPROCESSOR
27-10
6 CODEC RESET
For details, please refer the CODEC Reset part of AC97 revision 2.0 specification.
6.1.1 Cold AC97 Reset
A cold reset is generated when the nRESET pin is asserted through the AC_GLBCTRL. Asserting and
deasserting nRESET activates BITCLK and SDATA_OUT. All AC97 control registers are initialized to their default
power on reset values. nRESET is an asynchronous AC97 input.
6.1.2 Warm AC97 Reset
A Warm AC97 reset reactivates the AC-link without altering the current AC97 register values. A warm reset is
generated when BITCLK is absent and SYNC is driven high. In normal audio frames, SYNC is a synchronous
AC97 input. When BITCLK is absent, SYNC is treated as an asynchronous input used to generate a warm reset
to AC97.The AC97 Controller must not activate BITCLK until it samples SYNC low again. This prevents a new
audio frame from being falsely detected.
S3C2450X RISC MICROPROCESSOR AC97 CONTROLLER
27-11
7 AC97 CONTROLLER STATE DIAGRAM
IDLE
INIT
READY
ACTIVE LP
WARM
1
2
: ACLINK_ON
: CODEC_READY & TRANS_DATA & NORMAL_SYNC
: PCLK rising
1
: ~CODEC_READY | ~TRANS_DATA
: POWER_DOWN
: WARM_RESET
: !ACLINK_ON
5
: CODEC_WAKEUP
5
4
3
6
8
7
6
7
8
2
3
4
9
9
9
99
9: COLD_RESET | ~PRESETn
Figure 27-9. AC97 State Diagram
This is the state diagram of AC97 controller. It is helpful to understand AC97 controller state machine. State
above figure is synchronized by peripheral clock (PCLK). It is able to monitor state at AC_GLBSTAT register.
AC97 CONTROLLER S3C2450X RISC MICROPROCESSOR
27-12
8 AC97 CONTROLLER SPECIAL REGISTERS
8.1 AC97 SPECIAL FUNCION REGISTER SUMMARY
Register Address R/W Description Reset Value
AC_GLBCTRL 0x5B000000 R/W AC97 Global Control Register 0x00000000
AC_GLBSTAT 0x5B000004 R AC97 Global Status Register 0x00000001
AC_CODEC_CMD 0x5B000008 R/W AC97 Codec Command Register 0x00000000
AC_CODEC_STAT 0x5B00000C R AC97 Codec Status Register 0x00000000
AC_PCMADDR 0x5B000010 R AC97 PCM Out/In Channel FIFO Address
Register 0x00000000
AC_MICADDR 0x5B000014 R AC97 MIC In Channel FIFO Address Register 0x00000000
AC_PCMDATA 0x5B000018 R/W AC97 PCM Out/In Channel FIFO Data Register 0x00000000
AC_MICDATA 0x5B00001C R AC97 MIC In Channel FIFO Data Register 0x00000000
S3C2450X RISC MICROPROCESSOR AC97 CONTROLLER
27-13
8.2 AC97 GLOBAL CONTROL REGISTER (AC_GLBCTRL)
This is the global register of the AC97 controller. There are interrupt control registers, DMA control registers, AC-
Link control register, data transmission control register and related reset control register.
Register Address R/W Description Reset Value
AC_GLBCTRL 0x5B000000 R/W AC97 Global Control Register 0x000000
AC_GLBCTRL Bit Description Initial State
- [31:23] Reserved. 0
Codec ready interrupt enable [22] 0 = Disable
1 = Enable 0
PCM out channel underrun
interrupt enable
[21] 0 = Disable
1 = Enable ( FIFO is empty) 0
PCM in channel overrun
interrupt enable
[20] 0 = Disable
1 = Enable ( FIFO is full) 0
Mic in channel overrun
interrupt enable [19] 0 = Disable
1 = Enable ( FIFO is full) 0
PCM out channel threshold
interrupt enable
[18] 0 = Disable
1 = Enable ( FIFO is half empty) 0
PCM in channel threshold
interrupt enable
[17] 0 = Disable
1 = Enable ( FIFO is half full) 0
MIC in channel threshold
interrupt enable
[16] 0 = Disable
1 = Enable ( FIFO is half full) 0
- [15:14]
Reserved. 00
PCM out channel transfer
mode
[13:12] 00 = Off 01 = PIO 10 = DMA 11 = Reserved 00
PCM in channel transfer
mode
[11:10] 00 = Off 01 = PIO 10 = DMA 11 = Reserved 00
MIC in channel transfer mode [9:8] 00 = Off 01 = PIO 10 = DMA 11 = Reserved 00
- [7:4]
Reserved. 0000
Transfer data enable using
AC-link [3] 0 = Disable 1 = Enable 0
AC-Link on [2] 0 = Off
1 = SYNC signal transfer to Codec 0
Warm reset [1] 0 = Normal
1 = Wake up codec from power down 0
Cold reset [0] 0 = Normal (note 2)
1 = Reset Codec and Controller Registers (note 1)
0
NOTES:
1. During Cold reset, writing to any AC97 Registers will not affected.
2. When recovering from Cold reset, writing to any AC97 Registers will not be affected.
Example: For consecutive Cold reset and Warm reset, first set AC_GLBCTRL=0x1 then set AC_GLBCTRL=0x0.
After recovering from cold reset set AC_GLBCTRL=0x2 then AC_GLBCTRL=0x0.
AC97 CONTROLLER S3C2450X RISC MICROPROCESSOR
27-14
8.3 AC97 GLOBAL STATUS REGISTER (AC_GLBSTAT)
This is the status register. When the interrupt is occurred, you can check what the interrupt source is.
Register Address R/W Description Reset Value
AC_GLBSTAT 0x5B000004 R AC97 Global Status Register 0x00000001
AC_GLBSTAT Bit Description Initial State
- [31:23] Reserved. 0x00
Codec ready interrupt [22] 0 = Not requested 1 = Requested 0
PCM out channel underrun
interrupt [21] 0 = Not requested 1 = Requested 0
PCM in channel overrun interrupt [20] 0 = Not requested 1 = Requested 0
MIC in channel overrun interrupt [19] 0 = Not requested 1 = Requested 0
PCM out channel threshold
interrupt [18] 0 = Not requested 1 = Requested 0
PCM in channel threshold
interrupt [17] 0 = Not requested 1 = Requested 0
MIC in channel threshold
interrupt [16] 0 = Not requested 1 = Requested 0
- [15:3] Reserved. 0x000
Controller main state [2:0] 000 = Idle 001 = Init 010 = Ready
011 = Active 100 = LP 101 = Warm 001
8.4 AC97 CODEC COMMAND REGISTER (AC_CODEC_CMD)
When you control writing or reading, you must set the Read enable bit, If you want to write data to the AC97
Codec, you set the index(or address) of the AC97 Codec and data.
Register Address R/W Description Reset Value
AC_CODEC_CMD 0x5B000008 R/W AC97 Codec Command Register 0x00000000
AC_CODEC_CMD Bit Description Initial State
- [31:24] Reserved 0x00
Read enable [23] 0 = Command write (note)
1 = Status read 0
Address [22:16] Codec command address 0x00
Data [15:0] Codec command data 0x0000
NOTE: When the commands are written on the AC_CODDEC_CMD register, It is recommended that the delay time between
the command and the next command is more than 1 / 48kHz.
S3C2450X RISC MICROPROCESSOR AC97 CONTROLLER
27-15
8.5 AC97 CODEC STATUS REGISTER (AC_CODEC_STAT)
If the Read enable bit is 1 and Codec command address is valid, Codec status data is also valid.
Register Address R/W Description Reset Value
AC_CODEC_STAT 0x5B00000C R AC97 Codec Status Register 0x00000000
AC_CODEC_STAT Bit Description Initial State
- [31:23] Reserved. 0x00
Address [22:16] Codec status address 0x00
Data [15:0] Codec status data 0x0000
NOTES: If you want to read data from AC97 codec register via the AC_CODDEC_STAT register, you should follow the steps.
1. Write command address and data on the AC_CODEC_CMD register with Bit[23] =1.
2. Have a delay time.
3. Read command address and data from AC_CODEC_STAT register.
8.6 AC97 PCM OUT/IN CHANNEL FIFO ADDRESS REGISTER (AC_PCMADDR)
To index the internal PCM FIFOs address.
Register Address R/W Description Reset Value
AC_PCMADDR 0x5B000010 R AC97 PCM Out/In Channel FIFO Address Register 0x00000000
AC_PCMADDR Bit Description Initial State
- [31:28] Reserved. 0000
Out read address [27:24] PCM out channel FIFO read address 0000
- [23:20] Reserved. 0000
In read address [19:16] PCM in channel FIFO read address 0000
- [15:12] Reserved. 0000
Out write address [11:8] PCM out channel FIFO write address 0000
- [7:4] Reserved. 0000
In write address [3:0] PCM in channel FIFO write address 0000
AC97 CONTROLLER S3C2450X RISC MICROPROCESSOR
27-16
8.7 AC97 MIC IN CHANNEL FIFO ADDRESS REGISTER (AC_MICADDR)
To index the internal MIC-in FIFO address.
Register Address R/W Description Reset Value
AC_MICADDR 0x5B000014 R AC97 MIC In Channel FIFO Address Register 0x00000000
AC_MICADDR Bit Description Initial State
- [31:20] Reserved. 0000
Read address [19:16] MIC in channel FIFO read address 0000
- [15:4] Reserved. 0x000
Write address [3:0] MIC in channel FIFO write address 0000
8.8 AC97 PCM OUT/IN CHANNEL FIFO DATA REGISTER (AC_PCMDATA)
This is PCM out/in channel FIFO data register.
Register Address R/W Description Reset Value
AC_PCMDATA 0x5B000018 R/W AC97 PCM Out/In Channel FIFO Data Register 0x00000000
AC_PCMDATA Bit Description Initial State
Right data [31:16] PCM out/in right channel FIFO data
Read = PCM in right channel
Write = PCM out right channel
0x0000
Left data [15:0] PCM out/in left channel FIFO data
Read = PCM in left channel
Write = PCM out left channel
0x0000
8.9 AC97 MIC IN CHANNEL FIFO DATA REGISTER (AC_MICDATA)
This is MIC-in channel FIFO data register.
Register Address R/W Description Reset Value
AC_MICDATA 0x5B00001C R AC97 MIC In Channel FIFO Data Register 0x00000000
AC_MICDATA Bit Description Initial State
- [31:16] Reserved 0x0000
Mono data [15:0] MIC in mono channel FIFO data 0x0000
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-1
28 PCM AUDIO INTERFACE
1 OVERVIEW
The S3C2450 has two ports of PCM Audio Interface. The PCM Audio Interface module provides PCM bi-
directional serial interface to an external Codec.
1.1 FEATURE
• Mono, 16bit PCM, 2 ports audio interface.
• Master mode only, this block always sources the main serial clock
• The sources of PCM clock are based on an internal PCLK or an External Clock
• Input (16bit 32depth) and output(16bit 32depth) FIFOs to buffer data
• DMA interface for Tx and/or Rx
1.2 SIGNALS
Name Direction Description
PCM0_SCLK
PCM1_SCLK
Output Serial shift clock
PCM0_FSYNC
PCM1_FSYNC
Output Serial data indicator and synchronizer
PCM0_SDI
PCM1_SDI
Output Serial PCM input data
PCM0_SDO
PCM1_SDO
Output Serial PCM output data
PCM0_CDCLK
PCM1_CDCLK
Input Optional External Clock source
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-2
2 PCM AUDIO INTERFACE
The PCM Audio Interface provides a serial interface to an external Codec. The PCM module receives an input
PCMSOURCE_CLK that is used to generate the serial shift timing. The PCM interface outputs a serial data out, a
serial shift clock, and a sync signal. Data is received from the external Codec over a serial input line. All the serial
data in, serial data out, and sync signal are synchronized to the serial shift clock.
The serial shift clock, PCMSCLK, is generated from a programmable divide of the input PCMSOURCE_CLK. The
sync signal, PCMFSYNC, is generated based upon a programmable number of serial clocks and is one serial
data clock wide.
The PCM data words are 16-bits wide and serially shifted out 1-bit per PCMSCLK. Only one 16-bit word is shifted
out for each PCMFSYNC. The PCMSCLK will continue to toggle even after all 16-bits have been shifted out. The
PCMSOUT data will be a undefined after the 16-bit word has completed. The next PCMFSYNC will signal the
start of the next PCM data word.
The TX FIFO provides the 16-bit data word to be serially shifted out. This data is serially shifted out MSB first, one
bit per PCMSCLK. The PCM serial output data, PCMSOUT, is clocked out using the rising edge of the
PCMSCLK. The MSB bit position relative to the PCMFSYNC is programmable to be either coincident with the
PCMFSYNC or one PCMSCLK later. After all 16-bits have been shifted out, an interrupt can optionally be
generated indicating the end of the transfer.
When the data is being shifted out, the PCMSIN input is used to serially shift data in from the external codec. The
data is received MSB first and is clocked in the falling edge of PCMSCLK. The position of the first bit is
programmable to be coincident with the PCMFSYNC or one PCMSCLK later.
The first 16-bits are serially shifted into the PCM_DATAIN register which is later loaded into the RX FIFO.
Subsequent bits are ignored until the next PCMFSYNC.
Various Interrupts are available to indicate the status of the RX and TX FIFO. Each FIFO has a programmable
flag to indicate when the CPU needs to service the FIFO. For the RX FIFO there is an interrupt which will be
raised when the FIFO exceeds a certain programmable almost_full depth. Similarly there is a programmable
almost_empty interrupt for the TX FIFO.
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-3
3 PCM TIMING
The following figures show the timing relationship for the PCM transfers.
Figure 28-1 shows a PCM transfer with the MSB configured to be coincident with the PCMFSYNC. This MSB
positioning corresponds to setting the TX_MSB_POS and RX_MSB_POS bits in PCMCTL register to be 0.
PCMFSYNC
PCMSOUT 1415 13 1 0 dont care 15 14
. . .
output
output
output PCMSCLK
input
pcm_irq
(sync to DSP clk)
1415 13 1 0 dont care 15 14
. . .
input
internal
PCMSIN
PCMSOURCE_CLK
datain_reg_valid
Figure 28-1. PCM timing, TX_MSB_POS / RX_MSB_POS = 0
Figure 28-2 shows a PCM transfer with the MSB configured one shift clock after the PCMFSYNC. This MSB
positioning corresponds to setting the TX_MSB_POS and RX_MSB_POS bits in PCMCTL register to be 1.
PCMFSYNC
PCMSOUT 15 14 1 0 dont care 15
. . .
output
output
output PCMSCLK
input
pcm_irq
(sync to DSP clk)
15 14 1 0 dont care 15
. . .
input
internal
PCMSIN
PCMSOURCE_CLK
datain_reg_valid
Figure 28-2. PCM timing, TX_MSB_POS / RX_MSB_POS = 1
NOTE
In all cases, the PCM shift timing is derived by dividing the input clock, PCMSOURCE_CLK. While the timing is based
upon the PCMSOURCE_CLK, there is no attempt to realign the rising edge of the output PCMSCLK with the original
PCMSOURCE_CLK input clock. These edges will be skewed by internal delay through the pads as well as the divider
logic. This does not represent a problem because the actual shift clock, PCMSCLK, is output with the data.
Furthermore, even if the PCMSCLK output is not used, the skew will be significantly less than the period of the
PCMSOURCE_CLK and should not represent a problem since most PCM interfaces capture data on the falling edge
of the clock.
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-4
3.1 PCM INPUT CLOCK DIAGRAM
Figure 28-3. Input Clock Diagram for PCM
S3C2450 PCM is able to select clock either PCLK or External Clock. Refer figure 28-3. To enable clock gating,
please refer to the SYSCON part(SCLKCON, PCLKCON).
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-5
3.2 PCM REGISTERS
There are 8 control registers for each PCM port. (Since there are two ports, the total number of control registers is
16.) The number(0 or 1) that follows each register name indicates which PCM module this register belongs to.
The details of those registers are as follows.
3.3 PCM REGISTER SUMMARY
Register Address R/W Description Reset Value
PCM_CTL0 0x5C000000 R/W PCM0 Main Control 0x00000000
PCM_CTL1 0x5C000100 R/W PCM1 Main Control 0x00000000
PCM_CLKCTL0 0x5C000004 R/W PCM0 Clock and Shift control 0x00000000
PCM_CLKCTL1 0x5C000104 R/W PCM1 Clock and Shift control 0x00000000
PCM_TXFIFO0 0x5C000008 R/W PCM0 TxFIFO write port 0x00010000
PCM_TXFIFO1 0x5C000108 R/W PCM1 TxFIFO write port 0x00010000
PCM_RXFIFO0 0x5C00000C R/W PCM0 RxFIFO read port 0x00010000
PCM_RXFIFO1 0x5C00010C R/W PCM1 RxFIFO read port 0x00010000
PCM_IRQ_CTL0 0x5C000010 R/W PCM0 Interrupt Control 0x00000000
PCM_IRQ_CTL1 0x5C000110 R/W PCM1 Interrupt Control 0x00000000
PCM_IRQ_STAT0 0x5C000014 R PCM0 Interrupt Status 0x00000000
PCM_IRQ_STAT1 0x5C000114 R PCM1 Interrupt Status 0x00000000
PCM_FIFO_STAT0 0x5C000018 R PCM0 FIFO Status 0x00000000
PCM_FIFO_STAT1 0x5C000118 R PCM1 FIFO Status 0x00000000
PCM_CLRINT0 0x5C000020 W PCM0 INTERRUPT CLEAR 0x00000000
PCM_CLRINT1 0x5C000120 W PCM1 INTERRUPT CLEAR 0x00000000
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-6
3.4 PCM CONTROL REGISTER
The PCM_CTL register is used to control the various aspects of the PCM module. It also provides a status bit to
provide the option to using polling instead of interrupt based control.
Register Address R/W Description Reset Value
PCM_CTL0 0x5C000000 R/W Control the PCM0 Audio Interface 0x00000000
PCM_CTL1 0x5C000100 R/W Control the PCM1 Audio Interface 0x00000000
The bit definitions for the PCM_CTL Control Register are shown below:
PCM_CTLn Bit Description Initial State
Reserved [31:19] Reserved
TXFIFO_DIPSTICK [18:13] Determines when the almost_full, almost_empty flags go
active for the TXFIFO
TXFIFO_ALMOST_EMPTY: txfifo_depth < txfifo_dipstick
TXFIFO_ALMOST_FULL: txfifo_depth > (32 –
txfifo_dipstick)
Note:
- If txfifo_dipstick is 0, Almost_empty, Almost_full are invalid
- For DMA loading of TX fifo, Txfifo_dipstick should be equal to 2
or greater than 2(txfifo_dipstick >= 2)
This is required since the PCM_TXDMA uses
TXFIFO_ALMOST_FULL as the DMA request (keep requesting data
until the FIFO is almost full) In some circumstances, the DMA write
one more word after the DMA_req goes away. Thus the almost_full
flag most go active with at least space for one extra word in the fifo
0
RXFIFO_DIPSTICK [12:7] Determines when the almost_full, almost_empty flags go
active for the RXFIFO
RXFIFO_ALMOST_EMPTY : fifo_depth < fifo_dipstick
RXFIFO_ALMOST_FULL : fifo_depth > (32 – fifo_dipstick)
Note:
- If fifo_dipstick is 0, Almost_empty, Almost_full are invalid.
- For DMA, RXFIFO_DIPSTICK is a don’t care.
(DMA unloading of RX fifo uses the RXFIFO_EMPTY flag as the
DMA request)
- Non-DMA IRQ/polling RXFIFO_DIPSTICK should be 32.
This will have the effect of RXFIFO_ALMOST_FULL acting as a
rx_fifo_not_empty flag (as a not RXFIFO_EMPTY).
0
PCM_TX_DMA_EN [6] Enable the DMA interface for the TXFIFO DMA must operate
in the demand mode.
DMA_TX request will occur whenever the TXFIFO is not
almost full
0
PCM_RX_DMA_EN [5] Enable the DMA interface for the RXFIFO DMA must operate
in the demand mode.
0
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-7
PCM_CTLn Bit Description Initial State
DMA_RX request will occur whenever the RXFIFO is not
empty.
TX_MSB_POS [4] Controls the position of the MSB bit in the serial output
stream relative to the PCMFSYNC signal
0 = MSB sent during the same clock that PCMFSYNC is high
1 = MSB sent on the next PCMSCLK cycle after
PCMFSYNC is high
0
RX_MSB_POS [3] Controls the position of the MSB bit in the serial input stream
relative to the PCMFSYNC signal
0 = MSB is captured on the falling edge of PCMSCLK during
the same cycle that PCMFSYNC is high
1 = MSB is captured on the falling edge of PCMSCLK during
the cycle after the PCMFSYNC is high
0
PCM_TXFIFO_EN [2]
Enable the TXFIFO (note 1) 0
PCM_RXFIFO_EN [1]
Enable the RXFIFO (note 1) 0
PCM_PCM_ENABL
E [0] PCM enable signal.
1 = Enables the serial shift state machines. (note 2)
The enable must be set HIGH for the PCM to operate.
0 = The PCMSOUT will not toggle.
The internal divider-counters (serial shift register’s counter)
are held in reset. (note 3)
0
NOTES:
1. To flush FIFO, first set PCM_TX/RXFIFO_EN =0x0 then set PCM_TX/RXFIFO_EN =0x1.
2. To Start PCM operation please refer the following steps
- PCM_TXFIFO_EN=0x1;
- PCM_TX_DMA_EN=0x1;
- wait until fifo full
- CTL_SERCLK_EN =0x1;
- PCM_PCM_ENABLE = 0x1;
3. To pause PCM operation, with CTL_SERCLK_EN = 0x0, PCM_PCM_ENABLE bit should be set to zero.
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-8
3.5 PCM CLK CONTROL REGISTER
Register Address R/W Description Reset Value
PCM_CLKCTL0 0x5C000004 R/W Control the PCM0 Audio Inteface 0x00000000
PCM_CLKCTL1 0x5C000104 R/W Control the PCM1 Audio Inteface 0x00000000
The bit definitions for the PCM_CTL Control Register are shown below:
PCM_CLKCTLn Bit Description Initial State
Reserved [31:20] Reserved
CTL_SERCLK_EN [19]
Enable the serial clock division logic.
Must be HIGH for the PCM to operate (if it is high, PCMSCLK
and PCMFSYNC is operated.) 1)
0
CTL_SERCLK_SEL [18]
Select the source of the PCMSOURCE_CLK
0 = External clock
1 = PCLK
0
SCLK_DIV [17:9]
Controls the divider used to create the PCMSCLK based on
the PCMSOURCE_CLK. (1/2~1/1024) PCMSLCK will be
PCMSOURCE_CLK / 2*(SCLK_DIV+1)
000
SYNC_DIV [8:0]
Controls the frequency of the PCMFSYNC signal based on
the PCMSCLK. (1/1~1/512)
Freq. of PCMFSYNC = Freq. of PCMSCLK/(SYNC_DIV+1)
000
NOTE: For correct functioning of PCM pause and continue, please refer following steps.
To Pause PCM operation, first set CTL_SERCLK_EN = 0x0, then set PCM_PCM_ENABLE =0x0.
To continue PCM operation, first set CTL_SERCLK_EN = 0x1, then set PCM_PCM_ENABLE =0x1.
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-9
3.6 THE PCM TX FIFO REGISTER
Register Address R/W Description Reset Value
PCM_TXFIFO0 0x5C000008 R/W PCM0 interface Transmit FIFO data register 0x00010000
PCM_TXFIFO1 0x5C000108 R/W PCM1 interface Transmit FIFO data register 0x00010000
The bit definitions for the PCM_TXFIFO Register are shown below:
PCM_TXFIFOn Bit Description Initial State
Reserved [31:17] Reserved
TXFIFO_DVALID [16] TXFIFO data is valid
Write: don’t care
Read: TXFIFO read data valid
1 = Valid
0 = Invalid (probably read an empty fifo)
1
TXFIFO_DATA [15:0] Write: Write PCM data to TXFIFO
Note: The TXFIFO is read by the PCM serial shift engine
Read: Read PCM data from TXFIFO for supporting debug
TXFIFO
0
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-10
3.7 PCM RX FIFO REGISTER
Register Address R/W Description Reset Value
PCM_RXFIFO0 0x5C00000C R/W PCM0 interface Receive FIFO data register 0x00010000
PCM_RXFIFO1 0x5C00010C R/W PCM1 interface Receive FIFO data register 0x00010000
The bit definitions for the PCM_RXFIFO Register are shown below:
PCM_RXFIFOn Bit Description Initial State
Reserved [31:17] Reserved
RXFIFO_DVALID [16] RXFIFO data is valid
Write: don’t care
Read: TXFIFO read data valid
1 = Valid
0 = Invalid (probably read an empty fifo)
1
RXFIFO_DATA [15:0] Write: Write PCM data to RXFIFO for debugging RXFIFO
Read: Read PCM data from RXFIFO
Note: The RXFIFO is written by the PCM serial shift engine
0
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-11
3.8 PCM INTERRUPT CONTROL REGISTER
The PCM_IRQ_CTL register is used to control the various aspects of the PCM interrupts.
Register Address R/W Description Reset Value
PCM_IRQ_CTL0 0x5C000010 R/W Control the PCM0 Interrupts 0x00000000
PCM_IRQ_CTL1 0x5C000110 R/W Control the PCM1 Interrupts 0x00000000
The bit definitions for the PCM_IRQ_CTL Control Register are shown below:
PCM_IRQ_CTLn Bit Description Initial State
Reserved [31:15] Reserved
EN_IRQ_TO_ARM [14] Controls whether the PCM interrupt is sent to the ARM or not
1: PCM IRQ is forwarded to the ARM subsystem
0: PCM IRQ is NOT forwarded to the ARM subsystem
0
Reserved [13] Reserved 0
TRANSFER_DONE [12] Interrupt is generated every time the serial shift for a 16bit
PCM Data word completes
1: IRQ source enabled
0: IRQ source disabled
0
TXFIFO_EMPTY [11] Interrupt is generated whenever the TxFIFO is empty
1: IRQ source enabled
0: IRQ source disabled
0
TXFIFO_ALMOST_
EMPTY
[10] Interrupt is generated whenever the TxFIFO is
ALMOST_EMPTY which is defined as TX_FIFO_DEPTH <
TX_FIFO_DIPSTICK
1: IRQ source enabled
0: IRQ source disabled
0
TXFIFO_FULL [9] Interrupt is generated whenever the TxFIFO is full
1: IRQ source enabled
0: IRQ source disabled
0
TXFIFO_ALMOST_F
ULL [8] Interrupt is generated whenever the TxFIFO is
ALMOST_FULL which is defined as TX_FIFO_DEPTH > (32
– TX_FIFO_DIPSTICK)
1: IRQ source enabled
0: IRQ source disabled
0
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-12
PCM_IRQ_CTLn Bit Description Initial State
TXFIFO_ERROR_
STARVE
[7] Interrupt is generated for TxFIFO starve ERROR.
This occurs whenever the TxFIFO is read when it is still
empty. This is considered an ERROR and will have
unexpected results
1: IRQ source enabled
0: IRQ source disabled
0
TXFIFO_ERROR_
OVERFLOW
[6] Interrupt is generated for TxFIFO overflow ERROR.
This occurs whenever the TxFIFO is written when it is already
full. This is considered an ERROR and will have unexpected
results
1: IRQ source enabled
0: IRQ source disabled
0
RXFIFO_EMPTY [5] Interrupt is generated whenever the RxFIFO is empty
1: IRQ source enabled
0: IRQ source disabled
0
RXFIFO_ALMOST_
EMPTY
[4] Interrupt is generated whenever the RxFIFO is
ALMOST_EMPTY which is defined as RX_FIFO_DEPTH <
RX_FIFO_DIPSTICK
1: IRQ source enabled
0: IRQ source disabled
0
RX_FIFO_FULL [3] Interrupt is generated whenever the RxFIFO is full
1: IRQ source enabled
0: IRQ source disabled
0
RX_FIFO_ALMOST_
FULL
[2] Interrupt is generated whenever the RxFIFO is
ALMOST_FULL which is defined as RX_FIFO_DEPTH > (32
– RX_FIFO_DIPSTICK)
1: IRQ source enabled
0: IRQ source disabled
0
RXFIFO_ERROR_ST
ARVE [1] Interrupt is generated for RxFIFO starve ERROR.
This occurs whenever the RxFIFO is read when it is still
empty. This is considered an ERROR and will have
unexpected results
1: IRQ source enabled
0: IRQ source disabled
0
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-13
PCM_IRQ_CTLn Bit Description Initial State
RXFIFO_ERROR_
OVERFLOW
[0] Interrupt is generated for RxFIFO overflow ERROR.
This occurs whenever the RxFIFO is written when it is already
full. This is considered an ERROR and will have unexpected
results
1: IRQ source enabled
0: IRQ source disabled
0
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-14
3.9 PCM INTERRUPT STATUS REGISTER
The PCM_IRQ_STAT register is used to report IRQ status.
Register Address R/W Description Reset Value
PCM_IRQ_STAT0 0x5C000014 R PCM0 Interrupt Status 0x00000000
PCM_IRQ_STAT1 0x5C000114 R PCM1 Interrupt Status 0x00000000
The bit definitions for the PCM_IRQ_STATUS Register are described below:
PCM_IRQ_STATn Bit Description Initial State
Reserved [31:14] Reserved
IRQ_PENDING [13]
Monitoring PCM IRQ.
1 = PCM IRQ is occurred.
0 = PCM IRQ is not occurred.
0
TRANSFER_DONE [12]
Interrupt is generated every time the serial shift for a word
completes
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
TXFIFO_EMPTY [11]
Interrupt is generated whenever the TX FIFO is empty
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
TXFIFO_ALMOST
_EMPTY [10] Interrupt is generated whenever the TxFIFO is ALMOST empty.
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
TXFIFO_FULL [9]
Interrupt is generated whenever the TX FIFO is full
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
TXFIFO_ALMOST
_FULL [8] Interrupt is generated whenever the TX FIFO is ALMOST full.
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
TXFIFO_ERROR
_STARVE [7] Interrupt is generated for TX FIFO starve ERROR.
This occurs whenever the TX FIFO is read when it is still empty.
This is considered as an ERROR and will have unexpected
results
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-15
PCM_IRQ_STATn Bit Description Initial State
TXFIFO_ERROR
_OVERFLOW [6] Interrupt is generated for TX FIFO overflow ERROR.
This occurs whenever the TX FIFO is written when it is already
full. This is considered as an ERROR and will have unexpected
results
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
RXFIFO_EMPTY [5]
Interrupt is generated whenever the RX FIFO is empty
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
RXFIFO_ALMOST
_EMPTY [4] Interrupt is generated whenever the RX FIFO is ALMOST
empty.
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
RX_FIFO_FULL [3]
Interrupt is generated whenever the RX FIFO is full
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
RX_FIFO_ALMOST
_FULL [2] Interrupt is generated whenever the RX FIFO is ALMOST full.
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
RXFIFO_ERROR
_STARVE [1] Interrupt is generated for RX FIFO starve ERROR.
This occurs whenever the RX FIFO is read when it is still empty.
This is considered as an ERROR and will have unexpected
results
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
RXFIFO_ERROR
_OVERFLOW [0] Interrupt is generated for RX FIFO overflow ERROR.
This occurs whenever the RX FIFO is written when it is already
full. This is considered as an ERROR and will have unexpected
results
1 = IRQ is occurred.
0 = IRQ is not occurred.
0
NOTE: More than one interrupt sources(which was set by PCM_IRQ_CTL register) can cause interrupt, at same time(i.e,
interrupt at PCM is OR-ed interrupt.) So in Interrupt Service Routine, user should check this register bits which you set
as interrupt sources.
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-16
3.10 PCM FIFO STATUS REGISTER
The PCM_FIFO_STAT register is used to report FIFO status.
Register Address R/W Description Reset Value
PCM_FIFO_STAT0 0x5C000018 R PCM0 FIFO Status 0x00000000
PCM_FIFO_STAT1 0x5C000118 R PCM1 FIFO Status 0x00000000
The bit definitions for the PCM_FIFO_STATUS Register are shown below:
PCM_FIFO_STATn Bit Description Initial State
Reserved [31:20]
Reserved
TXFIFO_COUNT [19:14]
TX FIFO data count(0 ~ 32). 0
TXFIFO_EMPTY [13]
1 = TXFIFO is empty
0 = TXFIFO is not empty
0
TXFIFO_ALMOST_EMPTY [12]
1 = TXFIFO is ALMOST_EMPTY
0 = TXFIFO is not ALMOST_EMPTY
0
TXFIFO_FULL [11]
1 = TXFIFO is full
0 = TXFIFO is not full
0
TXFIFO_ALMOST_FULL [10]
1 = TXFIFO is ALMOST_FULL
0 = TXFIFO is not ALMOST_FULL
0
RXFIFO_COUNT [9:4]
RX FIFO data count(0 ~ 32).
RXFIFO_EMPTY [3]
1 = RXFIFO is empty
0 = RXFIFO is not empty
0
RXFIFO_ALMOST_EMPTY [2]
1 = RXFIFO is ALMOST_EMPTY
0 = RXFIFO is not ALMOST_EMPTY
0
RX_FIFO_FULL [1]
1 = RXFIFO is full
0 = RXFIFO is not full
0
RX_FIFO_ALMOST_FULL [0]
1 = RXFIFO is ALMOST_FULL
0 = RXFIFO is not ALMOST_FULL
0
S3C2450X RISC MICROPROCESSOR PCM AUDIO INTERFACE
28-17
3.11 PCM INTERRUPT CLEAR REGISTER
The PCM_CLRINT register is used to clear the interrupt. Interrupt service routine is responsible for clearing
interrupt asserted. Writing any values on this register clears interrupts for ARM. Reading this register is not
allowed. Clearing interrupt must be prior to resolving the interrupt condition, otherwise another interrupt that would
occur after this interrupt may be ignored.
Register Address R/W Description Reset Value
PCM_CLRINT0 0x5C000020 W PCM0 INTERRUPT CLEAR -
PCM_CLRINT1 0x5C000120 W PCM1 INTERRUPT CLEAR
The bit definitions for the PCM_CLRINT Register are shown below:
PCM_CLRINTn Bit Description Initial State
Reserved [31:1] Reserved 0
CLRINT [0] Interrupt register clear 0
PCM AUDIO INTERFACE S3C2450X RISC MICROPROCESSOR
28-18
NOTES
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-1
29 ELECTRICAL DATA
1 ABSOLUTE MAXIMUM RATINGS
Table 29-1. Absolute Maximum Rating
Parameter Symbol Min Max Unit
VDDi, VDDiarm, VDDalive,
VDDA_MPLL, VDDA_EPLL,
VDDI_UDEV
-0.5 1.8
VDD_OP1, VDD_OP2, VDD_OP3,
VDD_RTC, VDD_SRAM,
VDD_CAM, VDD_SD, VDDA_ADC,
VDDA33x, VDD_USBOSC
-0.5 4.6
DC Supply Voltage
VDD_SDRAM -0.5 3.6
DC Input Voltage VIN -0.5 3.6/4.8
DC Output Voltage VOUT -0.5 3.6/4.8
V
DC Input Current II/O +/- 200 mA
Storage Temperature TSTG -65 to 150 οC
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-2
2 RECOMMENDED OPERATING CONDITIONS
Table 29-2. Recommended Operating Conditions (400MHz)
Parameter Symbol Min Typ Max Unit
DC Supply Voltage for Alive Block VDDalive 1.15 1.2 1.25
ARMCLK / HCLK DC Supply Voltage for Core Block
400/133
MHz
VDDiarm
VDDi
VDDA_MPLL
VDDA_EPLL
1.25 1.3 1.35
DC Supply Voltage for I/O Block1 VDD_OP1** 1.7 1.8 / 2.5 /3.3 3.6
DC Supply Voltage for I/O Block2 VDD_OP2 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for I/O Block3 VDD_OP3 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for USBOSC PAD VDD_USBOSC 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for SRAM I/F VDD_SRAM 1.7 1.8 / 2.5 /3.3 3.6
DC Supply Voltage for SDRAM I/F VDD_SDRAM 1.7 1.8 / 2.5 2.7
DC Supply Voltage for RTC VDD_RTC 1.7 1.8 / 2.5 /3.3 3.6
VDD_CAM 1.7 1.8 / 2.5 / 3.3 3.6
VDD_SD 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for CAM/SD/LCD
VDD_LCD 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for USB PHY 3.3V VDDA33x 3.3-5% 3.3 3.3+5%
DC Supply Voltage for USB PHY 1.2V VDDI_UDEV 1.2-5% 1.2 1.2+5%
DC Supply Voltage for ADC VDDA_ADC 3.0 3.3 3.6
3.0 3.3 3.6
2.3 2.5 2.7
DC Input Voltage VIN
1.7 1.8 1.95
3.0 3.3 3.6
2.3 2.5 2.7
DC Output Voltage VOUT
1.7 1.8 1.95
V
Industrial -40 to 85 Operating Temperature TA
Extended -20 to 70
oC
NOTE: **If not use USB function, VDD_OP1 have a range from 2.3V to 3.6V.
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-3
Table 29-3. Recommended Operating Conditions (533MHz)
Parameter Symbol Min Typ Max Unit
DC Supply Voltage for Alive Block VDDalive 1.15 1.2 1.25
ARMCLK / HCLK
VDDiarm 1.275 1.325 1.375
DC Supply Voltage for Core Block
533/133
MHz
VDDi
VDDA_MPLL
VDDA_EPLL
1.15 1.2 1.25
DC Supply Voltage for I/O Block1 VDD_OP1** 1.7 1.8 / 2.5 /3.3 3.6
DC Supply Voltage for I/O Block2 VDD_OP2 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for I/O Block3 VDD_OP3 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for USB OSC PAD VDD_USBOSC 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for SRAM I/F VDD_SRAM 1.7 1.8 / 2.5 /3.3 3.6
DC Supply Voltage for SDRAM I/F VDD_SDRAM 1.7 1.8 / 2.5 2.7
DC Supply Voltage for RTC VDD_RTC 1.7 1.8 / 2.5 /3.3 3.6
VDD_CAM 1.7 1.8 / 2.5 / 3.3 3.6
VDD_SD 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for CAM/SD/LCD
VDD_LCD 1.7 1.8 / 2.5 / 3.3 3.6
DC Supply Voltage for USB PHY 3.3V VDDA33x 3.3-5% 3.3 3.3+5%
DC Supply Voltage for USB PHY 1.2V VDDI_UDEV 1.2-5% 1.2 1.2+5%
DC Supply Voltage for ADC VDDA_ADC 3.0 3.3 3.6
3.0 3.3 3.6
2.3 2.5 2.7
DC Input Voltage VIN
1.7 1.8 1.95
3.0 3.3 3.6
2.3 2.5 2.7
DC Output Voltage VOUT
1.7 1.8 1.95
V
Industrial -40 to 85 Operating Temperature TA
Extended -20 to 70
οC
NOTE: **If not use USB function, VDD_OP1 have a range from 2.3V to 3.6V.
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-4
3 D.C. ELECTRICAL CHARACTERISTICS
Table 29-4. Normal I/O PAD DC Electrical Characteristics
VDD = 1.7V~3.60V, Vext = 3.0~5.5V , TA = -40 to 85°C
Parameter Condition Min Typ Max Unit
VDD Power Off 3.6 V
VDD=3.3V 5.5
VDD=2.5V 5.5
Vtol Tolerant external
voltage** VDD Power On
VDD=1.8V 3.6
V
High Level Input Voltage
Vih LVCMOS Interface 0.7VDD VDD+0.3 V
Low Level Input Voltage
Vil LVCMOS Interface -0.3 0.3VDD V
ΔV Hysteresis Voltage 0.1VDD V
High Level Input Current
Input Buffer Vin=VDD -10 10 uA
Tolerant Input
Buffer** Vin=Vext -10 10 uA
VDD=3.3V 20 70 130
VDD=2.5V 10 40 80
Input Buffer with
pull-down Vin=VDD
VDD=1.8V 5 20 40
uA
Vin=5V VDD=3.3V 10 30 60
Vin=3.3V VDD=2.5V 6 16 50
Iih
Tolerant Input
Buffer with pull-up**
Vin=3.3V VDD=1.8V 2 8 18
uA
Low Level Input Current
Input Buffer Vin=VSS -10 10 uA
VDD=3.3V -130 -70 -20
VDD=2.5V -80 -40 -10
Iil
Input Buffer with
pull-up Vin=VSS
VDD=1.8V -40 -20 -5
uA
Voh Type A,B,C Ioh=-100uA VDD-0.2 V
Vol Type A,B,C Iol=100uA 0.2 V
Ioz Tri-State Output
Leakage Current Vout=VSS or VDD -10 10 uA
CIN Input capacitance Any input and Bidirectional
buffers 5 pF
COUT Output capacitance Any output buffer 5 pF
NOTE: **specification is only available on tolerant cells.
Driver Type A, B, C : Refer to DC currents table of output driver.
The specification is basically referred to JEDEC JESD8 standard and have extended interface voltage range of
1.7V~3.6V The specification can be changed depending on interface voltage
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-5
Table 29-5. Special Memory DDR I/O PAD DC Electrical Characteristics
VDD =1.7V~2.7V, Vext = 3.0~3.6V , TA = -40 to 85°C
Parameter Condition Min Typ Max Unit
VDD Power Off 2.7 V
VDD=2.5V 3.6
Vtol Tolerant external
voltage** VDD Power
On VDD=1.8V 3.6 V
High Level Input Voltage
Vih LVCMOS Interface 0.7VDD VDD+0.3 V
Low Level Input Voltage
Vil LVCMOS Interface -0.3 0.3VDD V
ΔV Hysteresis Voltage 0.1VDD V
High Level Input Current
Input Buffer Vin=VDD -10 10 uA
Tolerant Input
Buffer** Vin=Vext -10 10 uA
VDD=2.5V 10 40 80
Input Buffer with
pull-down Vin=VDD VDD=1.8V 5 20 40 uA
Vin=3.3V VDD=2.5V 3 10 40
Iih
Tolerant Input
Buffer with pull-
up** Vin=3.3V VDD=1.8V 1 4 10 uA
Low Level Input Current
Input Buffer Vin=VSS -10 10 uA
VDD=2.5V -80 -40 -10
Iil
Input Buffer with
pull-up Vin=VSS VDD=1.8V -40 -20 -5 uA
Voh Type A,B,C Ioh=-100uA VDD-0.2 V
Vol Type A,B,C Iol=100uA 0.2 V
Ioz Tri-State Output
Leakage Current Vout=VSS or VDD -10 10 uA
CIN Input capacitance
Any input and Bidirectional
buffers 5 pF
COUT Output
capacitance Any output buffer 5 pF
NOTE: **specification is only available on tolerant cells.
Driver Type A, B, C : Refer to DC currents table of output driver.
The specification is basically referred to JEDEC JESD8 standard and have extended interface voltage range of
1.7V~2.7V
The specification can be changed depending on interface voltage
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-6
Table 29-6. USB DC Electrical Characteristics
VDD = 3.0 to 3.6V; GND = 0V; Cload = 2uF; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
VDD Supply voltage 3.0 3.3 3.6 V
VDI Differential input sensitivity 0.2 V
VCM Differential common mode voltage 0.8 2.5 V
VIL Low level input voltage 0.8 V
VIH High level input voltage 2.0 V
VOL Low level output voltage RL = 1.5KΩ to +3.6V 0.3 V
VOH High level output voltage RL = 15KΩ to GND 2.8 3.6 V
ILZ Tri-state leakage current -10 10 uA
Cin Transceiver capacitance Pin to GND 10 pF
RPD Pull down resistance on pins DP/DM Enable internal resistors 10 20 kΩ
RPU Pull up resistance on DP Enable internal resistor 1 2 kΩ
ZDRV Driver output impedance Steady-state drive[1] 39 44
Ω
ZINP Input impedance 10 MΩ
VTERM Termination voltage for upstream port
pull up 3.0 3.6 V
Table 29-7. RTC OSC DC Electrical Characteristics
Symbol Parameter Min Typ Max Unit
VDD_RTC Output supply voltage 1.7 2.5 3.6 V
VIH DC input logic high 0.7*VDDrtc V
VIL DC input logic low 0.3*VDDrtc V
IIH High level input current -10 10 μA
IIL Low level input current -10 10 μA
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-7
4 A.C. ELECTRICAL CHARACTERISTICS
1/2 VDD_OP1
1/2 VDD_OP1
tXTALCYC
NOTE: The clock input from the XTIpll pin.
Figure 29-1. XTIpll Clock Timing
tEXTHIGH
1/2 VDD_OP1
VIL
VIL
VIH
VIH
1/2 VDD_OP1
tEXTLOW
tEXTCYC
NOTE: The clock input from the EXTCLK pin.
Figure 29-2. EXTCLK Clock Input Timing
HCLK
(internal)
EXTCLK
t
EX2HC
Figure 29-3. EXTCLK/HCLK in case that EXTCLK is used without the PLL
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-8
HCLK
(internal)
SCLK
CLKOUT
(HCLK)
t
HC2CK
t
HC2SCLK
Figure 29-4. HCLK/CLKOUT/SCLK in case that EXTCLK is used
Figure 29-5. Manual Reset Input Timing
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-9
nRESET
XTIpll or
EXTCLK
VCO
output
MCU operates by XTIpll
or EXTCLK clcok.
Clock
Disable
tPLL
FCLK is new frequency.
Power
PLL can operate after OM[3:2] is latched.
PLL is configured by S/W first time.
VCO is adapted to new clock frequency.
FCLK
...
...
...
tRST2RUN
Figure 29-6. Power-On Oscillation Setting Timing
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-10
XTIpll
VCO
Output
Clock
Disable
FCLK
Several slow clocks (XTIpll or EXTCLK)
Sleep mode is initiated.
tOSC2
EXTCLK
Wake up from sleep mode
Figure 29-7. Sleep Mode Return Oscillation Setting Timing
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-11
Figure 29-8. SMC Synchronous Read Timing
Figure 29-9. SMC Asynchronous Read Timing
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-12
tCSD_A
tADDRD_A
tWED
tDOD_A
Asynchronous Write
SMCLK
RADDR
RDATA
nRCS
nRWE
A
D(A)
Figure 29-10. SMC Asynchronous Write Timing
Figure 29-11. SMC Synchronous Write Timing
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-13
RADDR
[26:0]
RDATA
[31:0]
nRCS
nROE
nWAIT
A
D(A)
SMCLK
tWS tHS
Figure 29-12. SMC Wait Timing
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-14
TACLS TWRPH0 TWRPH1
COMMAND
TWRPH0 TWRPH1
ADDRESS
RDATA
[15:0]
HCLK
FCLE
nFWE
tCLED tCLED
tWED tWED
tWDD
tWDD
tALED
tWED
tALED
tWED
tWDD
TACLS
tWDD
TWRPH0 TWRPH1
ADDRESS
tWDD
tALED
tWED
tALED
tWED
tWDD
TACLS
<Nand booting> <After Nand booting>
HCLK
nFWE
TWRPH0 TWRPH1
HCLK
nFRE
TWRPH0 TWRPH1
RDATA
tWED
tWED
tWDD
tRED
tRED
tRDS
tRDH
tWDD
WDATA
RDATA
[15:0]
HCLK
FALE
nFWE
RDATA
[15:0]
HCLK
FALE
nFWE
Figure 29-13. Nand Flash Timing
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-15
Figure 29-14. SDRAM READ / WRITE Timing (Trp = 2, Trcd = 2, Tcl = 2, DW = 16-bit)
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-16
SCLK
SDATA
DQS
nSCAS
tSWD
tWPRE
tDQSS
tDH
tDS
WRITE TIMING @ RL = 3, WL=RL-1
SDATA
DQS
nSWE
tSWD
tDQSQ
nSCAS
READ TIMING @ RL = 3
nSWE
tSCD
Figure 29-15. DDR2 Timing
Parameter Symbol Min Max Unit
DDR2 First DQS latching transition to associated
clock edge
tDQSS 0.4 0.66 ns
DDR2 DQ and DM output setup time tDS x 2.70 ns
DDR2 DQ and DM output hold time tDH x 1.53 ns
DDR2 DQS-DQ skew for DQS and associated DQ
signals
tDQSQ x 0.7 ns
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-17
SCLK
nSRAS
tSAD
nSCAS
SDATA
SADDR
DQMx
tSRD
SCKE
A10/AP
nSCSx
tSCSD
nSWE
tSAD
tSCD
tSWD
'1'
tSAD
tSCSD
tSRD
'HZ'
'1'
tSWD
Figure 29-16. SDRAM MRS Timing
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-18
SCLK
nSRAS
tSAD
Trp
nSCAS
SDATA
SADDR
DQMx
tSRD
SCKE
A10/AP
nSCSx
tSCSD
nSWE
tSAD
tSCD
tSWD
'1'
tSAD
tSCSD
tSRD
'1'
'1'
'HZ'
Trc
NOTE: Before executing auto/self refresh command, all banks must be in idle state.
Figure 29-17. SDRAM Auto Refresh Timing (Trp = 2, Trc = 4)
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-19
HCLK
tXRS
tXRS
tCADL
tCADH
tXAD
nXDREQ
nXDACK
Read Write
Min. 3SCLK
Figure 29-18. External DMA Timing (Handshake, Single transfer)
VSYNC
HSYNC
VDEN
Tf2hsetup
Tf2hhold
Tvspw Tvbpd Tvfpd
HSYNC
VCLK
VD
VDEN
Tl2csetup Tvclkh Tvclk
Tvclkl Tvdhold
Tvdsetup Tve2hold
Figure 29-19. TFT LCD Controller Timing
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-20
I2SLRCLK(Output)
I2SSCLK(Output)
I2SSDO(Output)
T
LRId
T
DS
T
DH
Figure 29-20. IIS Interface Timing (I2S Master Mode Only)
I2SLRCLK(Input)
I2SSCLK(Input)
I2SSDI(Input)
T
LRId
T
DS
T
DH
Figure 29-21. IIS Interface Timing (I2S Slave Mode Only)
tSTOPH
tSTARTS
tSDAS tSDAHtBUF
tSCLHIGH tSCLLOW
fSCL
IICSCL
IICSDA
Figure 29-22. IIC Interface Timing
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-21
SD_CLK
tHSDCD
SD_CMD(out)
tHSDCHtHSDCS
tHSDDD
SD_CMD(in)
tHSDDHtHSDDS
SD_DAT(out)
SD_DAT(in)
Figure 29-23. High Speed SDMMC Interface Timing
SPICLK
tSPIMIH
tSPIMIS
XspiMOSI
(MO)
XspiMOSI
(SI)
XspiMISO
(MI)
` `
`
tSPIMOD
`
`
`
`
tSPISIS
tSPISIH
XspiMISO
(SO)
tSPISOD
`
`
`
`
XspiCS
tSPICSSS
tSPICSSD
Figure 29-24. High Speed SPI Interface Timing (CPHA = 0, CPOL = 1)
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-22
VCRS
Differential
Data Lines
TR TF
90%
10%
90%
10%
Rise Time Fall Time
Figure 29-25. USB Timing (Data signal rise/fall time)
Figure 29-26. PCM Interface Timing
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-23
Table 29-8. Clock Timing Constants
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_OP1 = 3.3V ± 0.3V)
Parameter Symbol Min Typ Max Unit
Crystal clock input frequency fXTAL 10 - 30 MHz
Crystal clock input cycle time tXTALCYC 33 - 100 ns
External clock input frequency (note 1) fEXT 10 133 MHz
External clock input cycle time (note 1) tEXTCYC 7.5 100 ns
External clock input low level pulse width tEXTLOW 3.5 - ns
External clock input high level pulse width tEXTHIGH 3.5 - ns
External clock to HCLK (without PLL) tEX2HC 5 13 ns
HCLK (internal) to CLKOUT tHC2CK 3.3 8.8 ns
HCLK (internal) to SCLK tHC2SCLK 1.9 5.8 ns
Reset assert time after clock stabilization tRESW 4 - XTIpll or
EXTCLK
PLL Lock Time tPLL 300 - us
Sleep mode return oscillation setting time. (note 2) tOSC2 2 524290 XTIpll or
EXTCLK
The interval before CPU runs after nRESET is
released.
tRST2RUN 5 - XTIpll or
EXTCLK
NOTES:
1. If does not use MPLL, External clock input range is 10MHz ~ 133MHz but if use MPLL , External clock input range is
10MHz ~ 30MHz
2. tOSC2 is programmable by setting the PWRSETCNT bits in Reset Count register.
tOSC2 = (PWRSETCNT+1) * 2048
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-24
Table 29-9. SMC Timing Constants
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_SRAM = 1.8V ± 0.1V)
Parameter Symbol Min Typ Max Unit
bank0 2.3 - 5.72 ns
bank1 2.2 6.40
bank2 2.1 6.28
bank3 2.5 7.59
bank4 2.3 6.28
SMC Chip Select Delay tCSD
bank5 2.2 6.40
SMC Output Enable Delay tOED 2.0 - 6.19 ns
SMC Write Enable Delay tWED 2.1 - 6.06 ns
SMC Address Delay tADDRD 2.3 - 6.49 ns
SMC Data Output Delay tDOD 2.8 - 6.53 ns
SMC nWAIT setup time tWS 2.3 - 5 ns
SMC nWAIT hold time tWH 0 - 0 ns
Table 29-10. NFCON Bus Timing Constants
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_SRAM = 1.8V ± 0.1V)
Parameter Symbol Min Max Unit
NFCON Chip Enable delay tCED - 10.35 ns
NFCON CLE delay tCLED - 9.86 ns
NFCON ALE delay tALED - 9.73 ns
NFCON Write Enable delay tWED - 9.71 ns
NFCON Read Enable delay tRED - 10.27 ns
NFCON Write Data delay tWDD - 9.95 ns
NFCON Read Data Setup requirement time tRDS 1.00 - ns
NFCON Read Data Hold requirement time tRDH 0.20 - ns
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-25
Table 29-11. Memory Interface Timing Constants (SDRAM)
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_SDRAM = 1.8V ± 0.1V,
133MHz, CL = 15pF)
Parameter Symbol Min Max Unit
SDRAM Address Delay tSAD 1.65 4.25 ns
SDRAM Chip Select Delay tSCSD 1.62 3.84 ns
SDRAM Row active Delay tSRD 1.70 3.86 ns
SDRAM Column active Delay tSCD 1.68 3.93 ns
SDRAM Byte Enable Delay tSBED 1.63 4.31 ns
SDRAM Write enable Delay tSWD 1.63 3.74 ns
SDRAM read Data Setup time tSDS 1.50 - ns
SDRAM read Data Hold time tSDH 1.50 - ns
SDRAM output Data Delay tSDD 1.57 4.61 ns
SDRAM Clock Enable Delay tCKED 1.69 4.02 ns
NOTE: If CL increases over the 15pF, operation conditions follow the guide table
Load Capacitance (CL) Bus clock Voltage
< 15 pF 133MHz
15 pF < CL < 20 pF 100MHz
1.8V± 0.1V
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-26
Table 29-12. DMA Controller Module Signal Timing Constants
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_OP2 = 3.3V ± 0.3V)
Parameter Symbol Min Typ Max Unit
eXternal Request Setup tXRS 6.4/6.4 - 9.9/9.9 ns
aCcess to Ack Delay when Low transition tCADL 3.1/2.8 7.8/7.1 ns
aCcess to Ack Delay when High transition tCADH 2.8/2.5 7.8/6.9 ns
eXternal Request Delay tXAD 2 - - HCLK
Table 29-13. TFT LCD Controller Module Signal Timing Constants
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_LCD = 3.3V ± 0.3V)
Parameter Symbol Min Typ Max Units
VCLK pulse width Tvclk 18 200 - ns
VCLK pulse width high Tvclkh 0.3 - - Pvclk(note1)
VCLK pulse width low Tvclkl 0.3 - - Pvclk
Vertical sync pulse width Tvspw VSPW + 1 - - Phclk(note2)
Vertical back porch delay Tvbpd VBPD+1 - - Phclk
Vertical front porch delay Tvfpd VFPD+1 - - Phclk
Hsync setup to VCLK falling edge Tl2csetup 0.3 - - Pvclk
VDEN set up to VCLK falling edge Tde2csetup 0.3 - - Pvclk
VDEN hold from VCLK falling edge Tde2chold 0.3 - - Pvclk
VD setup to VCLK falling edge Tvd2csetup 0.3 - - Pvclk
VD hold from VCLK falling edge Tvd2chold 0.3 - - Pvclk
VSYNC setup to HSYNC falling edge Tf2hsetup HSPW + 1 - - Pvclk
VSYNC hold from HSYNC falling edge Tf2hhold HBPD + HFPD +
HOZVAL + 3
- - Pvclk
NOTES:
1. VCLK period
2. HSYNC period
Table 29-14. IIS Controller Module Signal Timing Constants(I2S Master Mode Only)
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = –40 to 85 °C, VDD_OP2 = 3.3V ± 0.3V)
Parameter Symbol Min. Typ. Max Unit
LR Clock Input Delay TLRId 5 - 13 ns
Serial Data Setup Time TDS 10 - ns
Serial Data Hold Time TDH 10 - ns
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-27
Table 29-15. IIS Controller Module Signal Timing Constants(I2S Slave Mode Only)
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = –40 to 85 °C, VDD_OP2 = 3.3V ± 0.3V)
Parameter Symbol Min. Typ. Max Unit
LR Clock Input Delay TLRId 0 - ns
Serial Data Setup Time TDS 10 - ns
Serial Data Hold Time TDH 10 - ns
Table 29-16. IIC BUS Controller Module Signal Timing
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_OP2 = 3.3V ± 0.3V)
Parameter Symbol Min Typ. Max Unit
SCL clock frequency fSCL - - std. 100
fast 400
kHz
SCL high level pulse width tSCLHIGH std. 4.0
fast 0.6
- -
μs
SCL low level pulse width tSCLLOW std. 4.7
fast 1.3
- -
μs
Bus free time between STOP and START tBUF std. 4.7
fast 1.3
- -
μs
START hold time tSTARTS std. 4.0
fast 0.6
- -
μs
SDA hold time tSDAH std. 0
fast 0
- std. - fast
0.9
μs
SDA setup time tSDAS std. 250
fast 100
- - ns
STOP setup time tSTOPH std. 4.0
fast 0.6
- -
μs
NOTES: Std. means Standard Mode and fast means Fast Mode.
1. The IIC data hold time(tSDAH) is minimum 0ns.
(IIC data hold time is minimum 0ns for standard/fast bus mode in IIC specification v2.1.)
Please check the data hold time of your IIC device if it's 0 nS or not.
2. The IIC controller supports only IIC bus device(standard/fast bus mode), not C bus device.
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-28
Table 29-17. High Speed SPI Interface Transmit/Receive Timing Constants
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_SD = 3.3V ± 0.3V)
(SPICLKout = 50Mhz, PAD loading = 30pF)
Parameter Symbol Min Typ. Max Unit
SPI MOSI Master Output Delay time tSPIMOD - - 7 ns
Feedback Delay- 0nS 4 - - ns
Feedback Delay- 2nS 3 - - ns
Feedback Delay- 4nS 2 - - ns
SPI MISO Master
Input Setup time
Feedback Delay- 6nS
tSPIMIS
1 - - ns
Feedback Delay- 0nS 4 - - ns
Feedback Delay- 2nS 6 - - ns
Feedback Delay- 4nS 9 - - ns
SPI MISO Master
Input Hold time
Feedback Delay- 6nS
tSPIMIH
11 - - ns
SPI MISO Slave output Delay time tSPISOD - 10 ns
SPI MOSI Slave Input Setup time tSPISIS 4 - - ns
SPI MOSI Slave Input Hold time tSPISIH 3 - - ns
SPI nSS Master Output Delay time tSPICSSD - 11 ns
Ch 0
SPI nSS Slave Input Setup time tSPICSSS - 10 ns
SPI MOSI Master Output Delay time tSPIMOD - - 8 ns
Feedback Delay- 0nS 4 - - ns
Feedback Delay- 2nS 3 - - ns
Feedback Delay- 4nS 2 - - ns
SPI MISO Master
Input Setup time
Feedback Delay- 6nS
tSPIMIS
1 - - ns
Feedback Delay- 0nS 4 - - ns
Feedback Delay- 2nS 7 - - ns
Feedback Delay- 4nS 10 - - ns
SPI MISO Master
Input Hold time
Feedback Delay- 6nS
tSPIMIH
12 - - ns
SPI MISO Slave output Delay time tSPISOD - 10 ns
SPI MOSI Slave Input Setup time tSPISIS 4 - - ns
SPI MOSI Slave Input Hold time tSPISIH 3 - - ns
SPI nSS Master Output Delay time tSPICSSD - 12 ns
Ch 1
SPI nSS Slave Input Setup time tSPICSSS - 10 ns
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-29
Table 29-18. USB Electrical Specifications
(VDD12V = 1.2V ± 5%, TA = -40 to 85°C, VDDA33x = 3.3V ± 0.3V)
Parameter Symbol Condition Min Max Unit
Supply Current
Operating Current - 100 mA
Room Temp (25°C) - 500 µA
Suspended Current Hot Temp (8°C) - 3 mA
Input Levels for Full speed
Differential Input Sensitivity VDI 0.2 V
Differential Common Mode Range VCM 0.8 2.5
Input Levels for High speed
Differential Common Mode Range VHSCM -50 500 mV
HS Squelch detection threshold VHSSQ 100 200 mV
Output Levels for FS
Low VOL 0.0 0.3 V
High VOH 2.8 3.6 V
Output Levels for HS
HS data signaling high VHSOH 360 460 mV
HS data signaling low VHSOL -15.0 15.0 mV
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-30
Table 29-19. USB Full Speed Output Buffer Electrical Characteristics
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDDA33x = 3.3V ± 0.3V)
Parameter Symbol Condition Min Max Unit
Driver Characteristics
Transition Time
Rise Time
Fall Time
TR
TF
CL = 50pF
CL = 50pF
4.0
4.0
20
20
ns
Rise/Fall Time Matching TRFM (TR / TF ) 90 110 %
Output Signal Crossover
Voltage
VCRS 1.3 2.0 V
Drive Output Resistance ZDRV Steady state drive 28 43 ohm
Table 29-20. USB High Speed Output Buffer Electrical Characteristics
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDDA33x = 3.3V ± 0.3V)
Parameter Symbol Condition Min Max Unit
Driver Characteristics
Transition Time
Rising Time
Falling Time
TR
TF
500
500
ps
ps
Drive Output Resistance ZDRV Steady state drive 40.5 49.5 ohm
Table 29-21. High Speed SDMMC Interface Transmit/Receive Timing Constants
(VDDi = 1.3V± 0.05V (400MHz), VDDi = 1.2 V± 0.05V (533MHz), TA = -40 to 85°C, VDD_SD = 3.3V ± 0.3V)
Parameter Symbol Min Typ. Max Unit
SD Command output Delay time tSDCD 0.4 - 4.0 ns
SD Command input Setup time tSDCS 5.0 - - ns
SD Command input Hold time tSDCH 2.0 - - ns
SD Data output Delay time tSDDD 0.4 - 4.0 ns
SD Data input Setup time tSDDS 5.0 - - ns
SD Data input Hold time tSDDH 2.0 - - ns
S3C2450X RISC MICROPROCESSOR ELECTRICAL DATA
29-31
Table 29-22. PCM Interface Timing
(VDDiI = 1.0V± 0.05V, TA = -40 to 85°C, VDD = 3.3V ± 0.3V, 2.5V ± 0.2V, 1.8V ± 0.1V)
Parameter Symbol Min. Typ. Max Unit
PCMSCLK clock width 1/tCW 0.128 - 8.192 MHz
PCMSCLK to PCMFSYNC delay tdFSYNC 0.5 - ns
PCMSCLK to PCMSOUT delay tdSOUT 0.5 - ns
PCMSIN setup time tsetupSIN 15 - ns
PCMSIN hold time tholdSIN 10 - ns
NOTE: This table is applied to PCM0 and PCM1, respectively.
ELECTRICAL DATA S3C2450X RISC MICROPROCESSOR
29-32
NOTES
S3C2450X RISC MICROPROCESSOR MECHANICAL DATA
30-1
30 MECHANICAL DATA
1 PACKAGE DIMENSIONS
Figure 30-1. 400-FBGA-1313 Package Dimension 1 (Top View)
MECHANICAL DATA S3C2450X RISC MICROPROCESSOR
30-2
Figure 30-2. 400-FBGA-1313 Package Dimension 2 (Bottom View)
APPROVAL NO. ISSUE 1.1
ITEM : BLUETOOTH MODULE
PART NO.: SBM2XA-05 1000AAA
APPROVAL NO. :
APPROVAL MODEL :
CONDITION : 1.
2.
3.
4.
상 SECTION DESIGNER CHECKED APPROVED
Dept/Name
customer
SIGN
SECTION DESIGNER CHECKED APPROVED
Dept/Name H.T.SHIN Joseph,Lee
SUPPLIER SIGN
SUPPLIER : SungJin Techwin Co.,Ltd.
ADDRESS : 256-8, In-Dong, Dong-Gu, Daejeon, Korea,300-828
042-271-1177(☎), 02-864-1091(R&D Center) Signature :
APPROVAL SHEET
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
2
APPROVAL SHEET CHANGE LIST
DATE ITEM CONTENTS EVIDENCE
ISSUE 1.0 2009.07.10
1st Draft
Bluetooth SIG Qualification
Design (QDL) Certificate
From ISSUE 1.0
To 1.1 2009.08.21
Add
certification RoHS
From ISSUE
To
From ISSUE
To
From ISSUE
To
From ISSUE
To
From ISSUE
To
From ISSUE
To
From ISSUE
To
From ISSUE
To
From ISSUE
To
From ISSUE
To
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
3
Contents
1. GENERAL PART..........................................................................................4
1.1 OVERVIEW.............................................................................................4
1.2 MAJOR FEATURES................................................................................4
1.3 MODULE BLOCK & INTERFACE............................................................4
1.4 MARKING AND EXTERNAL APPEARANCE...........................................5
1.5 PIN DESCRIPTION..................................................................................7
2. SPECIFICATION ...........................................................................................9
2.1 GENERAL SPECIFICATION.....................................................................9
2.2 TEMPERATURE SPECIFICATION...........................................................9
2.3 TX/RX SPECIFICATIONS........................................................................10
2.4 RELIABILITY TEST STANDARD.............................................................12
2.5 DAC Audio Interface...............................................................................13
3. APPLICATION NOTE....................................................................................14
4. RECOMMANDED REFLOW TEMPERATURE PROFILE.............................15
4.1 MS Level 3……………………………………………………………………...16
5. TEST REPORT.............................................................................................18
6. Test Procedure..............................................................................................19
7. PACKING INFORMATION………………………………………………………..20
7.1 CARRIER SPECIFICATION....................................................................20
7.2 REEL SPECIFIATION.............................................................................20
7.3 GIFT BOX SPECIFICATION....................................................................21
7.4 CARTON SPECIFIATION.......................................................................21
8.Bluetooth SIG Qualification..............................................................................22
9. RoHS DATA....................................................................................................23
9.1 RoHS.........................................................................................................23
9.2 Crystal Resonator DSX321G Certificate of Conformity RoHS...................26
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
4
1. General Part
1.1 Overview
SBM2XA-05, This bluetooth handsfree module, provides a high quality, high integration, and cost
effective solution for hands-free mobile communication such as Hands Free Car Kits or Telematics
devices or luxury bluetooth Headset(mono,stereo) with noise&echo cancellation or portable bluetooth
MP3 with RF tunning
Further more,SungJin Techwin Co., Ltd. is doing customer full support as software porting or echo
&noise tunning or bluetooth approval even production tooling.
This module deployed CSR's BC57E687B.
1.2 Major Features
- Fully Qualified Bluetooth v2.1 + EDR
- Specification System
- Best in Class Bluetooth Radio with 8dBm
- Class 2 Level Output Power Available (Max. +4dBm)
- Transmit Power and -87.5dBm Receive Sensitivity
- Internal DSP is involved
- 64MIPS Kalimba DSP Co-processor
- 16-bit Internal Stereo CODEC 95dB SNR for DAC
- Operation, 3.3V I/O
- Supply Voltage : 2.8~3.5V
- USB, I2C and UART with Dual-port Bypass Mode to 4Mbits/s
- Supports : 16Mbit of Flash Memory
- Multi-configurable I2S, PCM or SPDIF Interface
- Enhanced Audibility and Noise Cancellation
- Support for 802.11 Co-existence
- RoHS Compliant
- Competitive Size : 16.5mm x 16.5mm x 3mm ± 0.2mm
- Wide operating temperature range : -40℃ to 85℃
- Support of all Bluetooth packet types(Voice and Data)
- Support profile : HSP,HFP,A2DP,AVRCP,OPP,PBAP,AT command for phonebook
download
- TTS (Text to Speech) support
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
5
1.3 Module Block & Interface
1.4 Marking and External Appearance
1.4.1 Marking
①
S B M 2 X A - 05
② ③ ④ ⑤ ⑥ ⑦
10 00 A A A
ⓐ ⓑ ⓒ ⓓ ⓔ
No Index No Index
① Manufacturer ⓐ IO Vout
10 : VDD, 26MHz
② Module’s Abbreviation
(SB : SUNGJIN Bluetooth) ⓑ Manufactured Month
③ Application/Interface
M : MM/ E : External Memory ⓒ Manufactured Line
④ Class : (1 : Class 1)
(2 : Class 2) ⓓ Manufactured Factory
⑤ Customer ⓔ History
⑥ PCB revision
⑦ CSR version (BC05)
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
6
1.4.2 External Appearance
1.4.3 Physical Dimension
Mark Dimension Mark Dimension Mark Dimension
L 16.5±0.2 W 16.5±0.2 T 3±0.2
A 17.8±0.1 B 17.8±0.1 C 16.0±0.1
D 16.0±0.1 E 3.2±0.1 F 1.2±0.1
G 3.2±0.1 H 2.0±0.1 I 0.8±0.1
J 0.8±0.1 K 0.9±0.1
L1 0.8±0.1
M 2.0±0.1 - -
L1
SBM2XA-05
1000AAA
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
7
1.5 PIN Description
Terminal
No. Terminal
Name Type Description
(1) SPK_R- Analogue (output) Speaker output negative(right Channel)
(2) SPK_R+ Analogue (output) Speaker output positive(right Channel)
(3) AIO[0] Bi-directional Programmable input/output line
(4) AIO[1] Bi-directional Programmable input/output line
(5) VDD_USB VDD (Input) Positive supply for USB ports (3.3V)
(6) USB_DN Bi-directional USB data minus
(7) USB_DP Bi-directional USB data plus with selectable internal 1.5kΩ pull-up
resistor
(8) PIO[4]
Bi-directional with
programmable strength
internal pull-up/down
PIO or USB on (input senses when VBUS is high,
wakes BlueCore3-Multimedia)
(9) PIO[5]
Bi-directional with
programmable strength
internal pull-up/down
PIO line or chip detaches from USB when this input is
high
(10) PIO[6]
Bi-directional with
programmable strength
internal pull-up/down
PIO line or clock request output to enable external
clock for external clock line
(11) PIO[7] Bi-directional with
programmable strength Programmable input/output line or programmable
frequency clock output
(12) GND GND GND
(13) UART_TX CMOS output, tri-state, with
weak internal pull-up UART data output
(14) UART_RX CMOS input with weak
internal pull-down UART data input
(15) PCM_CLK Bi-directional with weak
internal pull-down Synchronous data clock
(16) PCM_IN CMOS input with weak
internal pull-down Synchronous data input
(17) MIC_L+ Analogue (Input) Microphone Right channel input positive
(18) PCM_SYNC Bi-directional with weak
internal pull-down Synchronous data sync
(19) PCM_OUT CMOS output, tri-state, with
weak internal pull-up Synchronous data output
(20) MIC_L- Analogue (Input) Microphone Right channel input negative
(21) MIC_R+ Analogue (Input) Microphone Left channel input positive
(22) GND GND GND
(23) MIC_R- Analogue (Input) Microphone Left channel input negative
(24) SPI_MISO CMOS input with weak
internal pull-down Serial Peripheral Interface data output
(25) SPI_MOSI CMOS input with weak
internal pull-down Serial Peripheral Interface data input
(26) SPI_CSB CMOS input with weak
internal pull-up Chip select for Synchronous Serial Interface, active
low
(27) SPI_CLK CMOS input with weak
internal pull-down Serial Peripheral Interface clock
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
8
(28) IMIC BIAS Analogue Microphone bias
(29) PIO[11] Bi-directional with
programmable strength
internal pull-up/down Programmable input/output line
(30) PIO[10]
Bi-directional with
programmable strength
internal pull-up/down Programmable input/output line
(31) PIO[9]
Bi-directional with
programmable strength
internal pull-up/down Programmable input/output line
(32) PIO[8]
Bi-directional with
programmable strength
internal pull-up/down Programmable input/output line
(33) ANT For Antenna /50ohm
(34) GND GND
(35) PIO[3]
Bi-directional with
programmable strength
internal pull-up/down
PIO or output goes high to wake up PC when in USB
mode or clock request input from host controller
(36) PIO[2]
Bi-directional with
programmable strength
internal pull-up/down PIO or external clock request
(37) PIO[1]
Bi-directional with
programmable strength
internal pull-up/down Control output for external PA(if fitted)
(38) PIO[0]
Bi-directional with
programmable strength
internal pull-up/down Control output for external TX/RX(if fitted)
(39) VDD_1V8 1.8V Out For Test
(40) RESET RESET (Active: Low)
(41) VDD VDD 2.7V ~ 3.7V Voltage input
(42) SPK_L- Analogue (output) Speaker output negative(left Channel)
(43) SPK_L+ Analogue (output) Speaker output positive(left Channel)
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
9
2. Specification
2.1 General Specification
No Items Specification
1 Supply Voltage VCC : 2.7 ~ 3.7V
2 Carrier Frequency 2402MHz to 2480MHz (USA, Europe)
3 Modulation Method GFSK, π/4 DQPSK , 8DPSK
4 Transmission Power Max. 4dBm
5 Hopping 1600hpos/sec, 1MHz Channel space
6 Rx Sensitivity Typ. -87.5dBm
7 Output Interface UART, PIO,IIS,PCM
8 Compliant Bluetooth v2.1 + EDR
9 Built in Memory Flash memory(16Mbit)
10 Crystal 26MHz
2.2 Temperature Specification
No Items Specification
1 Operation Temperature -30℃ ~ 80℃
2 Storate Temperature -40℃ ~ 90℃
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
10
2.3 TX/RX Specifications
2.3.1 TX Radio Characteristics
Items Condition Min. Typ. Max Unit Remark
Output Power(Average) N&ETC -6 0 4 dBm
Delta-f1
avg N&ETC 140 165 175 kHz 11110000
Modulation characteristics Delta-f2
max N&ETC 115 140 kHz 1010
Initial carrier-frequency
tolerance N&ETC 10 75 kHz
DH1 N&ETC 12 25 kHz
DH3 N&ETC 12 40 kHz
Carrier frequency drift
DH5 N&ETC 15 40 kHz
DH1 N&ETC 8 20
kHz/
50us
DH3 N&ETC 10 20
kHz/
50us
Drift rate
DH5 N&ETC 12 20
kHz/
50us
20dB bandwidth N&ETC 900 100 kHz
|M-N|=2 N&ETC -40 -20 dBm
Adjacent channel power
|M-N|≥3N&ETC -50 -40 dBm
30M-1G N&ETC -65 -36 dBm
1G-
12.75G N&ETC -55 -30 dBm
1.8G-1.9G N&ETC -75 -47 dBm
Out-of-band spurious
emissions
5.15G-
5.3G N&ETC -75 -47 dBm
※ NTC:Normal Test Conditions +15 to +35℃, ETC:Extreme Test Conditions -40 to +85℃
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
11
2.3.2 RX Radio Characteristics
Items Condition Min. Typ. Max Unit Remark
Sensitivity
(single slot packets) N&ETC -85 -78 dBm
BER
<0.1%
Co-ch. NTC 9 11 dB
1MHz NTC -2 0 dB
2MHz NTC -34 -30 dB
≥3MHz NTC -43 -40 dB
Image NTC -18 -9 dB
C/I performance
Image±
1MHz NTC -23 -20 dB
30-2000M NTC -10 dBm
800M-
1000M NTC 10 dBm
1800M-
1900M NTC 10 dBm
2000-
2399M NTC -27 dBm
2498-
3000M NTC -27 dBm
Blocking performance
3G-
12.75G NTC -10 dBm
Inter modulation performance NTC -39 -30 dBm
30M-1G N&ETC -78 -57 dBm
Spurious emissions 1G-
12.75G N&ETC -55 -47 dBm
Maximum input level NTC -20 2 5 dBm
※ NTC:Normal Test Conditions +15 to +35℃, ETC:Extreme Test Conditions -40 to +85℃
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
12
2.4 Reliability Test Standard
Test Item Conditions Test No.
Step1 :150~170℃,70~175sec
Reflow
Step2 :230±5℃(peak)
Test 1
Temperature Drift 25→0→-20→50→70℃, 2Hr/step Test 2
High Temperature(Storage) 90℃, 120Hr Test 3
Low Temperature(Storage) -40℃, 120Hr Test 4
High Humidity(Storage) 50℃, 95% RH, 120Hr Test 5
High Temperature(Operating) 80 ℃, 120Hr Test 6
Low Temperture(Operating) -30℃, 120Hr Test 7
High Humidity(Operating) 50℃, 95%RH, 120Hr Test 8
-30℃/1Hr ↔ 80℃/1Hr
Thermal Shock (50 cycle) Test 9
Press Cooker Test 121℃, 100%RH, 2kf/cm square, 12Hr Test 10
Vibration Frequency : 20,80,350,2000Hz
Acceleration :6.98Grms(X,Y,Z each 50min,2cycle)
Vibration+Temperature &
Humidity Cycle
-20 ~ 50℃, 50~80%RH, 10Cycle
Test 11
Total(31 times) Dropping
:152cm(19 times), 120cm (12times) Test 12
Drop Test ※Test Conditions :
Test after 32times dropping module which is
embedded
In test set jig.
Test 13
ESD Test ANT and GND PIN : Contact discharge +/-2Kv
5 times(100pF, 1.5kohm) Test 14
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
13
2.5 DAC Audio Interface
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
14
3. Application Note
3.1 Application Schematic
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
15
4. Recommanded Reflow Temperature
※ One Reflow Cycle is permissible
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
16
4.1 MS Level 3
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
17
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
18
5. TEST REPORT
ITEM
SPEC No 1 2 3 4
MAKER
OUTPUT VOLTAGE 1.8V±0.1 (at 0mA)
SUPPLIER
MAKER
Maximum received
signal at 0.1% BER BER < 0.100%
SUPPLIER
MAKER
RF transmit Power -6.00dBm < Pav
< 4.00dBm SUPPLIER
MAKER
Initial carrier frequency
tolerance ±75 KHz
(max <= 75KHz) SUPPLIER
MAKER
drift_rate <= 20.0KHz/50 us
SUPPLIER
MAKER
f1 avg maximum
Modulation
140.0KHz
<= df1_avg
<= 175.0KHz, SUPPLIER
MAKER
f2avg/f1avgL df2/df1 >= 0.80%
SUPPLIER
MAKER
PIN CODE 0,0,0,0
SUPPLIER
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
19
6. Test Procedure
6.1. OUTPUT VOLTAGE 1.8V±0.1 (at 0mA)
6.2. Maximum received signal at 0.1% BER(bit error rate) : BER < 0.100%
6.3. RF transmit Power : -6.00dBm < Pav < 4.00dBm
6.4. Modulation Characteristics : ±75 KHz (max <= 75KHz)
:
6.5. Initial Carrier Frequency Tolerance (drift_rate) : <= 20.0KHz/50 us
6.6. CarrierFrequency Drift (f1 avg maximum Modulation) : 140.0KHz <= df1_avg <= 175.0KHz,
6.7. "CarrierFrequency Drift (f2avg/f1avgL) : df2/df1 >= 0.80%
6.8. PIN CODE : [0,0,0,0]
: Security
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
20
7. PACKING INFORMATION
7.1 CARRIER SPECIFICATION
8.2 REEL SPECIFICATION
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
21
7.3 GIFT BOX SPECIFICATION
7.4 CARTON BOX SPECIFICATION
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
22
8. Bluetooth SIG Qualification
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
23
9. RoHS DATA
9.1 RoHS
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
24
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
25
SBM2XA-05 Data Sheet
Copyright 2009 SungJin Techwin Co., Ltd..
26
9.2 Crystal Resonator DSX321G Certificate of Conformity RoHS