USB2517 USB 2.0 Hi Speed 7 Port Hub Controller Datasheet SMSC 2517
User Manual: USB2517
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USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
PRODUCT FEATURES
Datasheet
General Description
T h e S M S C 7 - P o r t H u b i s a l o w p o w e r, O E M
configurable, MTT (multi transaction translator) hub
controller IC with 7 downstream ports for embedded
USB solutions. The 7-port hub is fully compliant with the
USB 2.0 Specification and will attach to an upstream
port as a Full-Speed Hub or as a Full-/Hi-Speed Hub.
The 7-Port Hub supports Low-Speed, Full-Speed, and
Hi-Speed (if operating as a Hi-Speed Hub) downstream
devices on all of the enabled downstream ports.
General Features
Low power operation
Full Power Management with individual or ganged
power control of each downstream port
On-chip Power On Reset (POR)
Internal 1.8V Voltage Regulator
Fully integrated USB termination and Pull-up/Pulldown resistors
On Board 24MHz Crystal Driver, Resonator, or
External 24MHz clock input
USB host/device speed indicator. Per-port 3-color
LED drivers indicate the speed of USB host and
device connection - hi-speed (480 Mbps), full-speed
(12 Mbps), low-speed (1.5 Mbps)
Enhanced EMI rejection and ESD protection
performance
Programmable USB signal drive strength. Recover
USB signal integrity due to compromised system
environments using 4-level driving strength resolution
Select the presence of a permanently hardwired USB
peripheral device on a port by port basis
Configure the delay time for filtering the over-current
sense inputs
Configure the delay time for turning on downstream
port power
Indicate the maximum current that the 7-port hub
consumes from the USB upstream port
Indicate the maximum current required for the hub
controller
Support Custom String Descriptor up to 31 characters
in length for:
– Product String
– Manufacturer String
– Serial Number String
Pin Selectable Options for Default Configuration
— Select Downstream Ports as Non-Removable Ports
— Select Downstream Ports as Disabled Ports
— Select Downstream Port Power Control and OverCurrent Detection on a Ganged or Individual Basis
— Select USB Signal Drive Strength
— Select USB Differential Pair Pin location
Applications
Customizable Vendor ID, Product ID, and Device ID
Select whether the hub is part of a compound device
(When any downstream port is permanently
hardwired to a USB peripheral device, the hub is part
of a compound device.)
SMSC USB2517
OEM Selectable Features
— Eases PCB layout by aligning USB signal lines directly
to connectors
Hub Controller IC with 7 downstream ports
High-performance multiple transaction translator
MultiTRAK™ Technology provides one transaction
translator per port
Enhanced OEM configuration options available
through either a single serial I2CTM EEPROM, or
SMBus Slave Port
64-Pin (9x9 mm) QFN lead-free, RoHS compliant
package
Hardware Features
Flexible port mapping and disable sequence. Ports
can be disabled/reordered in any order to support
multiple product SKUs. Hub will automatically reorder
the remaining ports to match the Host controller's
numbering scheme
Programmable USB differential-pair pin location
LCD monitors and TVs
Multi-function USB peripherals
PC mother boards
Set-top boxes, DVD players, DVR/PVR
Printers and scanners
PC media drive bay
Portable hub boxes
Mobile PC docking
Embedded systems
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Order Number(s):
USB2517-JZX for 64 pin, QFN lead-free RoHS compliant package
This product meets the halogen maximum concentration values per IEC61249-2-21
For RoHS compliance and environmental information, please visit www.smsc.com/rohs
Please contact your SMSC sales representative for additional documentation related to this product
such as application notes, anomaly sheets, and design guidelines.
Copyright © 2012 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC
reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent
rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated
version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not
designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property
damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of
this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered
trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
The Microchip name and logo, and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE
OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL
DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT;
TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD
TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Revision 2.8 (09-17-12)
2
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table of Contents
Chapter 1 Acronyms & Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Chapter 2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 3 Pin Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1
64-Pin List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 5 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1
5.2
PIN Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Chapter 6 LED Usage Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1
LED Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Chapter 7 Configuration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1
7.2
7.3
7.4
7.5
7.6
7-Port Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EEPROM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMBus Slave Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Default Configuration Option: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Default Strapping Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
19
37
39
39
40
Chapter 8 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.1
8.2
Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Chapter 9 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1
Oscillator/Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Chapter 10 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
SMSC USB2517
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DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
List of Figures
Figure 2.1
Figure 4.1
Figure 6.1
Figure 7.1
Figure 7.2
Figure 7.3
Figure 7.4
Figure 7.5
Figure 7.6
Figure 8.1
Figure 9.1
Figure 9.2
Figure 10.1
USB2517 64-Pin QFN Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
USB2517 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dual Color LED Implementation Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Block Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Block Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
LED Strapping Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Reset_N Timing for Default/Strap Option Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Supply Rise Time Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Typical Crystal Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Formula to find value of C1 and C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
64-Pin QFN, 9x9mm Body, 0.5mm Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Revision 2.8 (09-17-12)
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DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
List of Tables
Table 3.1
Table 5.1
Table 5.2
Table 5.3
Table 7.1
Table 7.2
Table 7.3
Table 7.4
Table 7.5
Table 7.6
Table 7.7
Table 7.8
Table 8.1
Table 8.2
USB2517 64-Pin Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
USB2517 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
USB2517 SMBUS or EEPROM Interface Behavior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
USB2517 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Internal Default, EEPROM and SMBus Register Memory Map. . . . . . . . . . . . . . . . . . . . . . . . 19
Port Remap Register for Ports 1 & 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Port Remap Register for Ports 3 & 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Port Remap Register for Ports 5 & 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Port Remap Register for Port 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Reset_N Timing for Default/Strap Option Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Pin Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
SMSC USB2517
5
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Chapter 1 Acronyms & Definitions
EEPROMM: Electrically Erasable Programmable Read-Only Memory (a type of non-volatile memory)
EMI: Electromagnetic Interference
ESD: Electrostatic Discharge
I2CTM: Inter-Integrated Circuit1
LCD: Liquid Crystal Display
LED: Light Emitting Diode
OCS: Over-current sense
PCB: Printed Circuit Board
PHY: Physical Layer
PLL: Phase-Locked Loop
PVR: Personal Video Recorder (also known as a Digital Video Recorder)
QFN: Quad Flat No Leads
RoHS: Restriction of Hazardous Substances Directive
SCK: Serial Clock
SD: Secure Digital
SIE: Serial Interface Engine
SMBus: System Management Bus
TT: Transaction Translator
1.I2C is a registered trademark of Philips Corporation.
Revision 2.8 (09-17-12)
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DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
LED_B2_N/BOOST1
LED_A3_N/PRT_SWP3
VDD33
SUSP_IND/LOCAL_PWR/NON_REM0
VBUS_DET
RESET_N
HS_IND/CFG_SEL1
SCL/SMBCLK/CFG_SEL0
SDA/SMBDATA/NON_REM1
PRTPWR6
OCS6_N
OCS7_N
PRTPWR7
OCS5_N
LED_B3_N/GANG_EN
LED_A4_N/PRT_SWP4
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
Chapter 2 Pin Configuration
LED_A2_N/PRT_SWP2
49
32
LED_B4_N
LED_B1_N/BOOST0
50
31
LED_A5_N/PRT_SWP5
LED_A1_N/PRT_SWP1
51
30
PRTPWR5
VDDA33
52
29
PRTPWR1
USBDN6_DM/PRT_DIS_M6
53
28
OCS1_N
27
OCS2_N
26
PRTPWR2
25
VDD18
24
VDD33CR
USBDN6_DP/PRT_DIS_P6
54
USBDN7_DM/PRT_DIS_M7
55
USBDN7_DP/PRT_DIS_P7
56
VDDA33
57
USBUP_DM
58
23
PRTPWR3
USBUP_DP
59
22
OCS3_N
SMSC
USB2517
(Top View QFN-64)
XTAL2
60
21
OCS4_N
XTAL1/CLKIN
61
20
PRTPWR4
VDD18PLL
62
19
TEST
RBIAS
63
18
LED_B5_N
VDD33PLL
64
17
LED_A6_N/PRT_SWP6
10
11
12
13
14
15
16
USBDN5_DP/PRT_DIS_P5
CFG_SEL2
LED_B7_N
LED_A7_N/PRT_SWP7
LED_B6_N
9
USBDN4_DP/PRT_DIS_P4
VDDA33
8
USBDN4_DM/PRT_DIS_M4
USBDN5_DM/PRT_DIS_M5
7
5
VDDA33
6
4
USBDN2_DP/PRT_DIS_P2
USBDN3_DP/PRT_DIS_P3
3
USBDN3_DM/PRT_DIS_M3
2
USBDN1_DP/PRT_DIS_P1
USBDN2_DM/PRT_DIS_M2
USBDN1_DM/PRT_DIS_M1
1
Thermal Slug
(must be connected to VSS)
Indicates pins on the bottom of the device.
Figure 2.1 USB2517 64-Pin QFN Diagram
SMSC USB2517
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DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Chapter 3 Pin Table
3.1
64-Pin List
Table 3.1 USB2517 64-Pin Table
UPSTREAM USB 2.0 INTERFACES (3 PINS)
USBUP_DP
VBUS_DET
USBUP_DM
DOWNSTREAM 7-PORT USB 2.0 INTERFACES (43 PINS)
USBDN1_DP/
PRT_DIS_P1
USBDN2_DP/
PRT_DIS_P2
USBDN3_DP/
PRT_DIS_P3
USBDN4_DP/
PRT_DIS_P4
USBDN5_DP/
PRT_DIS_P5
USBDN6_DP/
PRT_DIS_P6
USBDN7_DP/
PRT_DIS_P7
USBDN1_DM/
PRT_DIS_M1
USBDN2_DM/
PRT_DIS_M2
USBDN3_DM/
PRT_DIS_M3
USBDN4_DM/
PRT_DIS_M4
USBDN5_DM/
PRT_DIS_M5
USBDN6_DM/
PRT_DIS_M6
USBDN7_DM/
PRT_DIS_M7
LED_A1_N/
PRT_SWP1
LED_A2_N/
PRT_SWP2
LED_A3_N/
PRT_SWP3
LED_A4_N/
PRT_SWP4
LED_A5_N/
PRT_SWP5
LED_A6_N/
PRT_SWP6
LED_A7_N/
PRT_SWP7
LED_B1_N/
BOOST0
LED_B2_N/
BOOST1
LED_B3_N/
GANG_EN
LED_B4_N
LED_B5_N
LED_B6_N
LED_B7_N
PRTPWR1
PRTPWR2
PRTPWR3
PRTPWR4
PRTPWR5
PRTPWR6
PRTPWR7
OCS1_N
OCS2_N
OCS3_N
OCS4_N
OCS6_N
OCS7_N
RBIAS
OCS5_N
SERIAL PORT INTERFACE (4 PINS)
SDA/
SMBDATA/
NON_REM1
SCL/
SMBCLK/
CFG_SEL0
HS_IND/
CFG_SEL1
CFG_SEL2
SUSP_IND/
LOCAL_PWR/
NON_REM0
RESET_N
MISC (5 PINS)
XTAL1/CLKIN
XTAL2
TEST
Revision 2.8 (09-17-12)
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DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table 3.1 USB2517 64-Pin Table (continued)
ANALOG POWER (6 PINS)
VDD18PLL
VDD33PLL
(4) VDDA33
DIGITAL POWER, GROUND (3 PINS)
VDD33
VDD18
VDD33CR
TOTAL 64
SMSC USB2517
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DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Chapter 4 Block Diagram
To Upstream
VBUS
Upstream USB
Data
To EEPROM or
SMBus Master
24 MHz Crystal
3.3V
SD
1.8V
PLL
Bus-Power
Detect/VBUS
Pulse
Upstream
PHY
Serial
Interface
1.8V Reg
SIE
Repeater
TT
#1
SCK
TT
#2
TT
#3
TT
#4
Controller
TT
#5
TT
#6
TT
#7
Port
Controller
Routing & Port Re-Ordering Logic
PHY#1
Port #1
Port #2
Port #7
OC
Sense
Switch
Driver
LED
Drivers
OC
Sense
Switch
Driver
LED
Drivers
OC
Sense
Switch
Driver
LED
Drivers
USB Data OC Sense
Downstream Switch/LED
Drivers
PHY#2
PHY#7
USB Data OC Sense
Downstream Switch/LED
Drivers
USB Data OC Sense
Downstream Switch/LED
Drivers
Figure 4.1 USB2517 Block Diagram
Revision 2.8 (09-17-12)
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DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Chapter 5 Pin Descriptions
5.1
PIN Descriptions
This section provides a detailed description of each signal. The signals are arranged in functional groups according
to their associated interface.
The “N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal is at a low
voltage level. When “N” is not present before the signal name, the signal is asserted when at the high voltage level.
The terms assertion and negation are used exclusively. This is done to avoid confusion when working with a mixture
of “active low” and “active high” signals. The term assert, or assertion, indicates that a signal is active, independent
of whether that level is represented by a high or low voltage. The term negate, or negation, indicates that a signal
is inactive.
Table 5.1 USB2517 Pin Descriptions
SYMBOL
64 QFN
BUFFER
TYPE
DESCRIPTION
UPSTREAM USB INTERFACES
USBUP_DP
USBUP_DM
59
58
IO-U
USB Bus Data
VBUS_DET
44
I/O12
These pins connect to the upstream USB bus data signals (Host
port, or upstream hub).
Detect Upstream VBUS Power
Detects state of Upstream VBUS power. The SMSC Hub monitors
VBUS_DET to determine when to assert the internal D+ pull-up
resistor (signaling a connect event).
When designing a detachable hub, this pin must be connected to
the VBUS power pin of the USB port that is upstream from the
hub.
For self-powered applications with a permanently attached host,
this pin must be connected to 3.3V or 5.0V (typically VDD33).
DOWNSTREAM 7-PORT USB 2.0 INTERFACES
USBDN[7:1]_DP/
PRT_DIS_P[7:1]
&
USBDN[7:1]_DM/
PRT_DIS_M[7:1]
PRTPWR[7:1]
SMSC USB2517
2
4
7
9
12
54
56
1
3
6
8
11
53
55
36
39
30
20
23
26
29
IO-U
Hi-Speed USB Data & Port Disable Strap Option
USBDN_DP[7:1] / PRT_DIS_P[7:1]: These pins connect to the
downstream USB peripheral devices attached to the hub’s port.
To disable, pull up with 10K resistor to 3.3V.
Downstream Port Disable Strap option:
USBDN_DM[7:1] / PRT_DIS_M[7:1]: If this strap is enabled by
package and configuration settings (see Table 5.2), this pin will be
sampled at RESET_N negation to determine if the port is
disabled.
O12
USB Power Enable
Enables power to USB peripheral devices downstream.
Note: The hub supports active high power controllers only!
11
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table 5.1 USB2517 Pin Descriptions (continued)
SYMBOL
64 QFN
LED_A[7:1]_N/
PRT_SWP[7:1]
15
17
31
33
47
49
51
BUFFER
TYPE
I/O12
DESCRIPTION
Port LED Indicators & Port Swap strapping option
Indicator LED for ports 1-7. Will be active low when LED support
is enabled via EEPROM or SMBus.
If this strap is enabled by package and configuration settings (see
Table 5.2), this pin will be sampled at RESET_N negation to
determine the electrical connection polarity of the downstream
USB Port pins (USB_DP and USB_DM).
Also, the active state of the LED will be determined as follows:
‘0’ = Port Polarity is normal, LED is active high.
LED_B[7:4]_N
LED_B3_N/
GANG_EN
14
16
18
32
34
I/O12
‘1’ = Port Polarity (USB_DP and USB_DM) is swapped, LED is
active low.
Enhanced Indicator Port 4-7 LED
Enhanced Indicator LED for ports 4-7. Will be active low when
LED support is enabled via EEPROM or SMBus.
I/O12
Enhanced Port 3 LED, Gang Power, and Over-current Strap
Option
Enhanced Indicator LED for port 3. Will be active low when LED
support is enabled via EEPROM or SMBus.
GANG_EN: Selects between Gang or Individual Port power and
Over-current sensing.
If this strap is enabled by package and configuration settings (see
Table 5.2), this pin will be sampled at RESET_N negation to
determine the mode as follows:
‘0’ = Individual sensing & switching, and LED_B3_N is active
high.
LED_B[2:1]_N/
BOOST[1:0]
48
50
I/O12
‘1’ = Ganged sensing & switching, and LED_B3_N is active low.
Enhanced Port [2:1] LED & PHY Boost strapping option
Enhanced Indicator LED for ports 1 & 2. Will be active low when
LED support is enabled via EEPROM or SMBus.
BOOST[1:0]: If this strap is enabled by package and configuration
settings (see Table 5.2), this pin will be sampled at RESET_N
negation to determine if all PHY ports (upstream and
downstream) operate at a normal or boosted electrical level. Also,
the active state of the LEDs will be determined as follows:
See Section 7.2.1.26, "Register F6h: Boost_Up" and Section
7.2.1.28, "Register F8h: Boost_4:0".
BOOST[1:0] = BOOST_IOUT[1:0]
BOOST[1:0] = ‘00’,
LED_B2_N is active high,
LED_B1_N is active high.
BOOST[1:0] = ‘01’,
LED_B2_N is active high,
LED_B1_N is active low.
BOOST[1:0] = ‘10’,
LED_B2_N is active low,
LED_B1_N is active high.
BOOST[1:0] = ‘11’,
LED_B2_N is active low,
LED_B1_N is active low.
Revision 2.8 (09-17-12)
12
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table 5.1 USB2517 Pin Descriptions (continued)
SYMBOL
64 QFN
OCS[7:1]_N
37
38
35
21
22
27
28
63
RBIAS
SDA/
SMBDATA/
NON_REM1
40
BUFFER
TYPE
IPU
DESCRIPTION
Over-current Sense
Input from external current monitor indicating an over-current
condition.
{Note: Contains internal pull-up to 3.3V supply}
I-R
USB Transceiver Bias
A 12.0kΩ (+/- 1%) resistor is attached from the ground to this pin
to set the transceiver’s internal bias settings.
SERIAL PORT INTERFACE
I/OSD12 Serial Data / SMB Data
NON_REM1: Non-removable port strap option.
If this strap is enabled by package and configuration settings (see
Table 5.2) this pin will be sampled (in conjunction with
SUSP_IND/LOCAL_PWR/NON_REM0) at RESET_N negation to
determine if ports [3:1] contain permanently attached (nonremovable) devices:
NON_REM[1:0] = ‘00’, All ports are removable,
NON_REM[1:0] = ‘01’, Port 1 is non-removable,
NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable,
NON_REM[1:0] = ‘11’, Ports 1, 2 & 3 are non-removable.
SCL/
41
I/OSD12
42
I/O12
SMBCLK/
CFG_SEL0
HS_IND/
CFG_SEL1
Serial Clock (SCL)
SMBus Clock (SMBCLK)
Configuration Select_SEL0: The logic state of this multifunctional
pin is internally latched on the rising edge of RESET_N
(RESET_N negation), and will determine the hub configuration
method as described in Table 5.2, "USB2517 SMBUS or
EEPROM Interface Behavior".
Hi-Speed Upstream port indicator & Configuration Programming
Select
HS_IND: High Speed Indicator for upstream port connection
speed.
The active state of the LED will be determined as follows:
CFG_SEL1 = ‘0’,
HS_IND is active high,
CFG_SEL1 = ‘1’,
HS_IND is active low,
‘Asserted’ = Hub is connected at HS
‘Negated’ = Hub is connected at FS
CFG_SEL1: The logic state of this pin is internally latched on the
rising edge of RESET_N (RESET_N negation), and will determine
the hub configuration method as described in Table 5.2,
"USB2517 SMBUS or EEPROM Interface Behavior".
SMSC USB2517
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Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table 5.1 USB2517 Pin Descriptions (continued)
SYMBOL
64 QFN
BUFFER
TYPE
CFG_SEL2
13
I
DESCRIPTION
Configuration Programming Select
Note:
XTAL1/
CLKIN
61
XTAL2
60
RESET_N
43
ICLKx
This pin is not available in all packages; it is held to a
logic ‘0’ when not available.
The logic state of this pin is internally latched on the rising edge
of RESET_N (RESET_N negation), and will determine the hub
configuration method as described in Table 5.2, "USB2517
SMBUS or EEPROM Interface Behavior".
MISC
Crystal Input/External Clock Input
OCLKx
24MHz crystal or external clock input.
This pin connects to either one terminal of the crystal or to an
external 24MHz clock when a crystal is not used.
Crystal Output
IS
24MHz Crystal
This is the other terminal of the crystal. It can be treated as a no
connect when an external clock source is used to drive
XTAL1/CLKIN. This output must not be used to drive any external
circuitry other than the crystal circuit.
RESET Input
The system can reset the chip by driving this input low. The
minimum active low pulse is 1 μs.
SUSP_IND/
LOCAL_PWR/
NON_REM0
45
I/O12
When the RESET_N pin is pulled to VDD33, the internal POR
(Power on Reset) is enabled and no external reset circuitry is
required. The internal POR holds the internal logic in reset until
the power supplies are stable.
Active/Suspend status LED or Local-Power & Non-Removable
Strap Option
Suspend Indicator: Indicates the USB state of the hub.
‘negated’ = Unconfigured or configured and in USB suspend
‘asserted’ = Hub is configured, and is active (i.e., not in suspend)
Local Power: Detects availability of local self-power source.
Low = Self/local power source is NOT available (i.e., Hub gets all
power from the upstream USB VBus).
High = Self/local power source is available.
NON_REM0 Strap Option:
If this strap is enabled by package and configuration settings (see
Table 5.2, "USB2517 SMBUS or EEPROM Interface Behavior"),
this pin will be sampled (in conjunction with NON_REM1) at
RESET_N negation to determine if ports [3:1] contain
permanently attached (non-removable) devices. Also, the active
state of the LED will be determined as follows:
NON_REM[1:0] = ‘00’, All ports are removable, and the LED is
active high
NON_REM[1:0] = ‘01’, Port 1 is non-removable, and the LED is
active low
NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable, and the
LED is active high
NON_REM[1:0] = ‘11’, Ports 1, 2 & 3 are non-removable, and the
LED is active low
Revision 2.8 (09-17-12)
14
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table 5.1 USB2517 Pin Descriptions (continued)
SYMBOL
64 QFN
BUFFER
TYPE
TEST
19
IPD
VDD18
25
DESCRIPTION
TEST pin
XNOR continuity tests all signal pins on the hub. Please contact
your SMSC representative for a detailed description of how this
test mode is enabled and utilized.
Power, Ground, No Connect
VDD Core
+1.8V core power. This pin must have a 1.0μF (or greater) ±20%
(ESR <0.1Ω) capacitor to VSS.
VDD33PLL
64
VDD 3.3 PLL Regulator Reference
62
+3.3V power supply for the Digital I/O. If the internal PLL 1.8V regulator is enabled, then this pin acts as the regulator input.
VDD PLL
VDD33
46
+1.8V Filtered analog power for internal PLL. This pin must have
a 1.0μF (or greater) ±20% (ESR <0.1Ω) capacitor to VSS.
VDD I/O
VDDA33
5
10
52
57
24
VDD18PLL
VDD33CR
Ground
VSS
+3.3V Digital I/O power
VDD Analog I/O
+3.3V Filtered analog PHY power which is shared between
adjacent ports.
VDDIO/VDD 3.3 Core Regulator Reference
+3.3V power supply for the Digital I/O. If the internal core
regulator is enabled, then VDD33CR acts as the regulator input.
Ground
Slug
Table 5.2 USB2517 SMBUS or EEPROM Interface Behavior
CFG_SEL2
CFG_SEL1
CFG_SEL0
0
0
0
Internal Default Configuration
Strap Option sare Enabled
0
0
1
Configured as an SMBus slave for external download
of user-defined descriptors
SMBus slave address is ‘0101100’
Strap Options are Disabled
All Settings are Controlled by Registers
0
1
0
Internal Default Configuration
Strap Options are Enabled
Bus Power Operation
LED Mode = USB
0
1
1
2-Wire I2C EEPROMS are supported
Strap Options are Disabled
All Settings are Controlled by Registers
1
0
0
Internal Default Configuration
Strap Options are Disabled
Dynamic Power Switching is Enabled
SMSC USB2517
SMBUS OR EEPROM INTERFACE BEHAVIOR
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DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
5.2
CFG_SEL2
CFG_SEL1
CFG_SEL0
SMBUS OR EEPROM INTERFACE BEHAVIOR
1
0
1
Internal Default Configuration
Strap Options are Disabled
Dynamic Power Switching is Enabled
LED Mode = USB
1
1
0
Internal Default Configuration
Strap Options are Disabled
1
1
1
Internal Default Configuration
Strap Options are Disabled
LED Mode = USB
Ganged Power Switching
Ganged Over-Current Sensing
Buffer Type Descriptions
Table 5.3 USB2517 Buffer Type Descriptions
BUFFER
I
DESCRIPTION
Input.
IPD
Input with internal weak pull-down resistor.
IPU
Input with internal weak pull-up resistor.
IS
Input with Schmitt trigger.
O12
Output 12mA.
I/O12
Input/Output buffer with 12mA sink and 12mA source.
I/OSD12
Open drain...12mA sink with Schmitt trigger, and must meet I2C-Bus Specification
Version 2.1 requirements.
ICLKx
XTAL clock input.
OCLKx
XTAL clock output.
I-R
IO-U
Revision 2.8 (09-17-12)
RBIAS.
Analog Input/Output Defined in USB specification.
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SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Chapter 6 LED Usage Description
6.1
LED Functionality
The hub supports 2 different (mutually exclusive) LED modes. The USB Mode provides 14 LED’s that conform to the
USB 2.0 specification functional requirements for Green and Amber LED’s. The LED Mode “Speed indicator” provides
the downstream device connection speed.
6.1.1
USB Mode 14-Wire
The LED_A[7:1]_N pins are used to provide Green LED support as defined in the USB 2.0 specification. The
LED_B[7:1]_N pins are used to provide Amber LED support as defined in the USB 2.0 specification. The USB
Specification defines the LED’s as port status indicators for the downstream ports. Please note that no indication of
port speed is possible in this mode. The pins are utilized as follows:
LED_A1_N = Port 1 green LED
LED_A2_N = Port 2 green LED
LED_A3_N = Port 3 green LED
LED_A4_N = Port 4 green LED
LED_A5_N = Port 5 green LED
LED_A6_N = Port 6 green LED
LED_A7_N = Port 7 green LED
LED_B1_N = Port 1 amber LED
LED_B2_N = Port 2 amber LED
LED_B3_N = Port 3 amber LED
LED_B4_N = Port 4 amber LED
LED_B5_N = Port 5 amber LED
LED_B6_N = Port 6 amber LED
LED_B7_N = Port 7 amber LED
6.1.2
LED Mode Speed Indication
The LED_A[7:1]_N pins are used to provide connection status as well as port speed by using dual color LED's. This
scheme requires that the LED's be in the same package, and that a third color is produced so that the user percieves
both LED's as being driven "simultaneously".
The LED_A[7:1] pins used in this mode are connected to 7 dual color LED’s (each LED pair in a single package).
These pins indicate the USB speed of each attached downstream device.
Each dual color LED provides two separate colors (commonly Green and Red). If each of these separate colors are
pulsed on and off at a rapid rate, a user will see a third color (in this example, Orange). Using this method, 4 different
"color" states are possible (Green, Red, Orange, and Off).
SMSC USB2517
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Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
3.3V
General
Purpose
Diode
Connect to other
dual color diodes.
D1A (Green LED)
Hub LED pin
Current limiting
resistor
D1B (Red LED)
Figure 6.1 Dual Color LED Implementation Example
Figure 6.1 shows a simple example of how this LED circuit will be implemented. The circuit should be replicated for
each of the 7 LED pins on the HUB. In this circuit, when the LED pin is driven to a logic low state, the Green LED
will light up. When the LED pin is driven to a Logic High state the Red LED will light up. When a 1 KHz square wave
is driven out on the LED pin, the Green and Red LED's will both alternately light up giving the effect of the color
Orange. When nothing is driven out on the LED pin (i.e. the pin floats to a "tri-state" condition), neither the Green
nor Red LED will light up, this is the "Off" state.
The assignment is as follows:
LED_A1_N = LED D1 (Downstream Port 1)
LED_A2_N = LED D2 (Downstream Port 2)
LED_A3_N = LED D3 (Downstream Port 3)
LED_A4_N = LED D4 (Downstream Port 4)
LED_A5_N = LED D5 (Downstream Port 5)
LED_A6_N = LED D6 (Downstream Port 6)
LED_A7_N = LED D7 (Downstream Port 7)
The usage is as follows:
LED_Ax_N Driven to Logic Low = LS device attached (Green LED)
LED_Ax_N Driven to Logic High = FS device attached (Red LED)
LED_Ax_N Pulsed @ 1 KHz= HS device attached (Orange color by pulsing Red & Green).
LED_Ax_N is tri-state= No devices are attached, or the hub is in suspend, LED's are off.
Revision 2.8 (09-17-12)
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SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Chapter 7 Configuration Options
7.1
7-Port Hub
SMSC’s USB 2.0 7-Port Hub is fully compliant to the Universal Serial Bus Specification Revision 2.0 from April 27,
2000 (12/7/2000 and 5/28/2002 Errata). Please reference Chapter 11 (Hub Specification) for general details regarding
Hub operation and functionality.
For performance reasons, the 7-Port Hub provides 1 Transaction Translator (TT) per port (defined as Multi-TT
configuration), divided into 4 non-periodic buffers per TT.
7.1.1
Hub Configuration Options
The SMSC Hub supports a large number of features (some are mutually exclusive), and must be configured in order
to correctly function when attached to a USB host controller. There are three principal ways to configure the Hub:
SMBus, EEPROM, or by internal default settings (with or without pin strapping option overrides). In all cases, the
configuration method will be determined by the CFG_SEL2, CFG_SEL1 and CFG_SEL0 pins immediately after
RESET_N negation.
7.1.1.1
Power Switching Polarity
Note: The hub will support active high power controllers only!
7.1.2
VBus Detect
According to Section 7.2.1 of the USB 2.0 Specification, a downstream port can never provide power to its D+ or Dpull up resistors unless the upstream port’s VBUS is in the asserted (powered) state. The VBUS_DET pin on the
Hub monitors the state of the upstream VBUS signal and will not pull up the D+ resistor if VBUS is not active. If
VBUS goes from an active to an inactive state (not powered), the Hub will remove power from the D+ pull up resistor
within 10 seconds.
7.2
EEPROM Interface
The SMSC Hub can be configured via a 2-wire (I2C) EEPROM (256x8). (Please see Table 5.2, "USB2517 SMBUS
or EEPROM Interface Behavior" for specific details on how to enable configuration via an I2C EEPROM).
The internal state machine will (when configured for EEPROM support) read the external EEPROM for configuration
data. The Hub will then “attach” to the upstream USB host.
Note: The Hub does not have the capacity to write, or “Program,” an external EEPROM. The Hub
only has the capability to read external EEPROMs. The external EEPROM will be read (even
if it is blank or non-populated), and the Hub will be “configured” with the values that are read.
Please see Internal Register Set (Common to EEPROM and SMBus) for a list of data fields available.
7.2.1
Internal Register Set (Common to EEPROM and SMBus)
Table 7.1 Internal Default, EEPROM and SMBus Register Memory Map
ABBR
INTERNAL
DEFAULT ROM
SMBUS AND
EEPROM POR
VALUES
VID LSB
VIDL
24h
0x00
R/W
VID MSB
VIDM
04h
0x00
02h
R/W
PID LSB
PIDL
17h
0x00
03h
R/W
PID MSB
PIDM
25h
0x00
04h
R/W
DID LSB
DIDL
00h
0x00
05h
R/W
DID MSB
DIDM
00h
0x00
REG
ADDR
R/W
REGISTER NAME
00h
R/W
01h
SMSC USB2517
19
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table 7.1 Internal Default, EEPROM and SMBus Register Memory Map (continued)
ABBR
INTERNAL
DEFAULT ROM
SMBUS AND
EEPROM POR
VALUES
Config Data Byte 1
CFG1
9Bh
0x00
R/W
Config Data Byte 2
CFG2
20h
0x00
08h
R/W
Config Data Byte 3
CFG3
00h
0x00
09h
R/W
Non-Removable Devices
NRD
00h
0x00
0Ah
R/W
Port Disable (Self)
PDS
00h
0x00
0Bh
R/W
Port Disable (Bus)
PDB
00h
0x00
0Ch
R/W
Max Power (Self)
MAXPS
01h
0x00
0Dh
R/W
Max Power (Bus)
MAXPB
32h
0x00
0Eh
R/W
Hub Controller Max Current
(Self)
HCMCS
01h
0x00
0Fh
R/W
Hub Controller Max Current
(Bus)
HCMCB
32h
0x00
10h
R/W
Power-on Time
PWRT
32h
0x00
11h
R/W
LANG_ID_H
LANGIDH
00h
0x00
12h
R/W
LANG_ID_L
LANGIDL
00h
0x00
13h
R/W
MFR_STR_LEN
MFRSL
00h
0x00
14h
R/W
PRD_STR_LEN
PRDSL
00h
0x00
15h
R/W
SER_STR_LEN
SERSL
00h
0x00
16h-53h
R/W
MFR_STR
MANSTR
00h
0x00
54h-91h
R/W
PROD_STR
PRDSTR
00h
0x00
92h-Cfh
R/W
SER_STR
SERSTR
00h
0x00
D0h-F5h
R/W
Reserved
N/A
00h
0x00
F6h
R/W
Boost_Up
BOOSTUP
00h
0x00
F7h
R/W
Boost_7:5
BOOST75
00h
0x00
F8h
R/W
Boost_4:0
BOOST40
00h
0x00
F9h
R/W
Reserved
N/A
00h
0x00
FAh
R/W
Port Swap
PRTSP
00h
0x00
FBh
R/W
Port Remap 12
PRTR12
00h
0x00
FCh
R/W
Port Remap 34
PRTR34
00h
0x00
FDh
R/W
Port Remap 56
PRTR56
00h
0x00
REG
ADDR
R/W
REGISTER NAME
06h
R/W
07h
Revision 2.8 (09-17-12)
20
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table 7.1 Internal Default, EEPROM and SMBus Register Memory Map (continued)
ABBR
INTERNAL
DEFAULT ROM
SMBUS AND
EEPROM POR
VALUES
Port Remap 7
PRTR7
00h
0x00
Status/Command
STCD
00h
0x00
REG
ADDR
R/W
REGISTER NAME
FEh
R/W
FFh
R/W
Note:
7.2.1.1
SMBus register
only
Register 00h: Vendor ID (LSB)
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
VID_LSB
Least Significant Byte of the Vendor ID. This is a 16-bit value that uniquely
identifies the Vendor of the user device (assigned by USB-Interface Forum).
This field is set by the OEM using either the SMBus or EEPROM interface
options.
7.2.1.2
Register 01h: Vendor ID (MSB)
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
VID_MSB
Most Significant Byte of the Vendor ID. This is a 16-bit value that uniquely
identifies the Vendor of the user device (assigned by USB-Interface Forum).
This field is set by the OEM using either the SMBus or EEPROM interface
options.
7.2.1.3
Register 02h: Product ID (LSB)
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
PID_LSB
Least Significant Byte of the Product ID. This is a 16-bit value that the Vendor
can assign that uniquely identifies this particular product (assigned by OEM).
This field is set by the OEM using either the SMBus or EEPROM interface
options.
7.2.1.4
Register 03h: Product ID (MSB)
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
PID_MSB
Most Significant Byte of the Product ID. This is a 16-bit value that the Vendor
can assign that uniquely identifies this particular product (assigned by OEM).
This field is set by the OEM using either the SMBus or EEPROM interface
options.
SMSC USB2517
21
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Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.5
Register 04h: Device ID (LSB)
BIT
NUMBER
BIT NAME
7:0
DID_LSB
7.2.1.6
Least Significant Byte of the Device ID. This is a 16-bit device release
number in BCD format (assigned by OEM). This field is set by the OEM
using either the SMBus or EEPROM interface options.
Register 05h: Device ID (MSB)
BIT
NUMBER
BIT NAME
7:0
DID_MSB
7.2.1.7
DESCRIPTION
DESCRIPTION
Most Significant Byte of the Device ID. This is a 16-bit device release
number in BCD format (assigned by OEM). This field is set by the OEM
using either the SMBus or EEPROM interface options.
Register 06h: CONFIG_BYTE_1
BIT
NUMBER
BIT NAME
7
SELF_BUS_PWR
DESCRIPTION
Self or Bus Power: Selects between Self- and Bus-Powered operation.
The Hub is either Self-Powered (draws less than 2mA of upstream bus
power) or Bus-Powered (limited to a 100mA maximum of upstream power
prior to being configured by the host controller).
When configured as a Bus-Powered device, the SMSC Hub consumes less
than 100mA of current prior to being configured. After configuration, the BusPowered SMSC Hub (along with all associated hub circuitry, any embedded
devices if part of a compound device, and 100mA per externally available
downstream port) must consume no more than 500mA of upstream VBUS
current. The current consumption is system dependent, and the OEM must
ensure that the USB 2.0 specifications are not violated.
When configured as a Self-Powered device, <1mA of upstream VBUS
current is consumed and all ports are available, with each port being capable
of sourcing 500mA of current.
This field is set by the OEM using either the SMBus or EEPROM interface
options.
Please see the description under Dynamic Power for the self/bus power
functionality when dynamic power switching is enabled.
0 = Bus-Powered operation
1 = Self-Powered operation
Note:
6
Reserved
5
HS_DISABLE
If Dynamic Power Switching is enabled, this bit is ignored and the
LOCAL_PWR pin is used to determine if the hub is operating from
self or bus power.
Reserved
High Speed Disable: Disables the capability to attach as either a High/Fullspeed device, and forces attachment as Full-speed only (i.e. no Hi-Speed
support).
0 = High-/Full-Speed
1 = Full-Speed-Only (Hi-Speed disabled!)
Revision 2.8 (09-17-12)
22
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
BIT
NUMBER
BIT NAME
4
MTT_ENABLE
DESCRIPTION
Multi-TT enable: Enables one transaction translator per port operation.
Selects between a mode where only one transaction translator is available
for all ports (Single-TT), or each port gets a dedicated transaction translator
(Multi-TT) {Note: The host may force single-TT mode only}.
0 = single TT for all ports
1 = one TT per port (multiple TT’s supported)
3
EOP_DISABLE
EOP Disable: Disables EOP generation of EOF1 when in Full-Speed mode.
During FS operation only, this permits the Hub to send EOP if no
downstream traffic is detected at EOF1. See Section 11.3.1 of the USB 2.0
Specification for additional details. Note: generation of an EOP at the EOF1
point may prevent a Host controller (operating in FS mode) from placing the
USB bus in suspend.
0 = EOP generation is normal
1 = EOP generation is disabled
2:1
CURRENT_SNS
Over-current Sense: Selects current sensing on a port-by-port basis, all ports
ganged, or none (only for bus-powered hubs). The ability to support current
sensing on a port or ganged basis is hardware implementation dependent.
00 = Ganged sensing (all ports together)
01 = Individual port-by-port
1x = Over-current sensing not supported (must only be used with BusPowered configurations!)
0
PORT_PWR
Port Power Switching: Enables power switching on all ports simultaneously
(ganged), or port power is individually switched on and off on a port- by-port
basis (individual). The ability to support power enabling on a port or ganged
basis is hardware implementation dependent.
0 = Ganged switching (all ports together)
1 = Individual port-by-port switching
7.2.1.8
Register 07h: Configuration Data Byte 2
BIT
NUMBER
BIT NAME
DESCRIPTION
7
DYNAMIC
Dynamic Power Enable: Controls the ability of the Hub to automatically
change from Self-Powered operation to Bus-Powered operation if the local
power source is removed or is unavailable (and from Bus-Powered to SelfPowered if the local power source is restored). {Note: If the local power
source is available, the Hub will always switch to Self-Powered operation.}
When Dynamic Power switching is enabled, the Hub detects the availability
of a local power source by monitoring the external LOCAL_PWR pin. If the
Hub detects a change in power source availability, the Hub immediately
disconnects and removes power from all downstream devices and
disconnects the upstream port. The Hub will then re-attach to the upstream
port as either a Bus-Powered Hub (if local-power is unavailable) or a SelfPowered Hub (if local power is available).
0 = No Dynamic auto-switching
1 = Dynamic Auto-switching capable
6
SMSC USB2517
Reserved
Reserved
23
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
BIT
NUMBER
BIT NAME
5:4
OC_TIMER
DESCRIPTION
Over-Current Timer: Over-Current Timer delay.
00 = 0.1ms
01 = 4ms
10 = 8ms
11 = 16ms
3
COMPOUND
Compound Device: Allows the OEM to indicate that the Hub is part of a
compound (see the USB Specification for definition) device. The applicable
port(s) must also be defined as having a "Non-Removable Device".
Note:
When configured via strapping options, declaring a port as nonremovable automatically causes the hub controller to report that it
is part of a compound device.
0 = No
1 = Yes, Hub is part of a compound device
2:0
7.2.1.9
Reserved
Reserved
Register 08h: Configuration Data Byte 3
BIT
NUMBER
BIT NAME
7:4
Reserved
3
PRTMAP_EN
DESCRIPTION
Reserved
Port Re-mapping enable: Selects the method used by the hub to assign port
numbers and disable ports.
‘0’ = Standard Mode
‘1’ = Port Re-map mode
2:1
LED_MODE
LED Mode Selection: The LED_A[7:1]_N and LED_B[7:1]_N pins support
several different modes of operation.
‘00’ = USB Mode
‘01’ = Speed Indication Mode
‘10’ = Same as ‘00’, USB Mode
‘11’ = Same as ‘00’, USB Mode
Warning: Do not enable an LED mode that requires LED pins that are not
available in the specific package being used in the implementation!
Note:
0
STRING_EN
The Hub will only report that it supports LED's to the host when
USB mode is selected. All other modes will be reported as No LED
Support.
Enables String Descriptor Support
‘0’ = String Support Disabled
‘1’ = String Support Enabled
Revision 2.8 (09-17-12)
24
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.10
Register 09h: Non-Removable Device
BIT
NUMBER
BIT NAME
7:0
NR_DEVICE
DESCRIPTION
Non-Removable Device: Indicates which port(s) include non-removable
devices. ‘0’ = port is removable, ‘1’ = port is non-removable.
Informs the Host if one of the active ports has a permanent device that is
undetachable from the Hub. (Note: The device must provide its own
descriptor data.)
When using the internal default option, the NON_REM[1:0] pins will
designate the appropriate ports as being non- removable.
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
7.2.1.11
7= 1; Port 7 non-removable
6= 1; Port 6 non-removable
5= 1; Port 5 non-removable
4= 1; Port 4 non-removable
3= 1; Port 3 non-removable
2= 1; Port 2 non-removable
1= 1; Port 1 non-removable
0 is Reserved, always = ‘0’
Register 0Ah: Port Disable For Self Powered Operation
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
PORT_DIS_SP
Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port
is available, ‘1’ = port is disabled.
During Self-Powered operation when remapping mode is disabled
(PRTMAP_EN='0'), this selects the ports which will be permanently disabled,
and are not available to be enabled or enumerated by a Host Controller. The
ports can be disabled in any order, the internal logic will automatically report
the correct number of enabled ports to the USB Host, and will reorder the
active ports in order to ensure proper function.
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
SMSC USB2517
7= 1; Port 7 is
6= 1; Port 6 is
5= 1; Port 5 is
4= 1; Port 4 is
3= 1; Port 3 is
2= 1; Port 2 is
1= 1; Port 1 is
0 is Reserved,
disabled
disabled
disabled
disabled
disabled
disabled
disabled
always = ‘0’
25
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.12
Register 0Bh: Port Disable For Bus Powered Operation
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
PORT_DIS_BP
Port Disable Bus-Powered: Disables 1 or more contiguous ports. ‘0’ = port
is available, ‘1’ = port is disabled.
During Self-Powered operation when remapping mode is disabled
(PRTMAP_EN='0'), this selects the ports which will be permanently disabled,
and are not available to be enabled or enumerated by a Host Controller. The
ports can be disabled in any order, the internal logic will automatically report
the correct number of enabled ports to the USB Host, and will reorder the
active ports in order to ensure proper function.
When using the internal default option, the PRT_DIS_P[7:1] and
PRT_DIS_M[7:1] pins will disable the appropriate ports.
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
7.2.1.13
7= 1; Port 7 is
6= 1; Port 6 is
5= 1; Port 5 is
4= 1; Port 4 is
3= 1; Port 3 is
2= 1; Port 2 is
1= 1; Port 1 is
0 is Reserved,
disabled
disabled
disabled
disabled
disabled
disabled
disabled
always = ‘0’
Register 0Ch: Max Power For Self Powered Operation
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
MAX_PWR_SP
Max Power Self_Powered: Value in 2mA increments that the Hub consumes
from an upstream port (VBUS) when operating as a self-powered hub. This
value includes the hub silicon along with the combined power consumption
(from VBUS) of all associated circuitry on the board. This value also includes
the power consumption of a permanently attached peripheral if the hub is
configured as a compound device, and the embedded peripheral reports
0mA in its descriptors.
Note:
7.2.1.14
The USB 2.0 Specification does not permit this value to exceed
100mA.
Register 0Dh: Max Power For Bus Powered Operation
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
MAX_PWR_BP
Max Power Bus_Powered: Value in 2mA increments that the Hub consumes
from an upstream port (VBUS) when operating as a bus-powered hub. This
value includes the hub silicon along with the combined power consumption
(from VBUS) of all associated circuitry on the board. This value also includes
the power consumption of a permanently attached peripheral if the hub is
configured as a compound device, and the embedded peripheral reports
0mA in its descriptors.
Revision 2.8 (09-17-12)
26
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.15
Register 0Eh: Hub Controller Max Current For Self Powered Operation
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
HC_MAX_C_SP
Hub Controller Max Current Self-Powered: Value in 2mA increments that the
Hub consumes from an upstream port (VBUS) when operating as a selfpowered hub. This value includes the hub silicon along with the combined
power consumption (from VBUS) of all associated circuitry on the board.
This value does NOT include the power consumption of a permanently
attached peripheral if the hub is configured as a compound device.
Note:
The USB 2.0 Specification does not permit this value to exceed
100mA.
A value of 50 (decimal) indicates 100mA, which is the default value.
7.2.1.16
Register 0Fh: Hub Controller Max Current For Bus Powered Operation
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
HC_MAX_C_BP
Hub Controller Max Current Bus-Powered: Value in 2mA increments that the
Hub consumes from an upstream port (VBUS) when operating as a buspowered hub. This value will include the hub silicon along with the combined
power consumption (from VBUS) of all associated circuitry on the board.
This value will NOT include the power consumption of a permanently
attached peripheral if the hub is configured as a compound device.
A value of 50 (decimal) would indicate 100mA, which is the default value.
7.2.1.17
Register 10h: Power-On Time
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
POWER_ON_TIME
Power On Time: The length of time that it takes (in 2 ms intervals) from the
time the host initiated power-on sequence begins on a port until power is
stable on that port.
7.2.1.18
Register 11h: Language ID High
BIT
NUMBER
BIT NAME
7:0
LANG_ID_H
7.2.1.19
DESCRIPTION
USB LANGUAGE ID (Upper 8 bits of a 16 bit ID field)
Register 12h: Language ID Low
BIT
NUMBER
BIT NAME
7:0
LANG_ID_L
SMSC USB2517
DESCRIPTION
USB LANGUAGE ID (Lower 8 bits of a 16 bit ID field)
27
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.20
Register 13h: Manufacturer String Length
BIT
NUMBER
BIT NAME
7:0
MFR_STR_LEN
DESCRIPTION
Manufacturer String Length
Maximum string length is 31 characters
7.2.1.21
Register 14h: Product String Length
BIT
NUMBER
BIT NAME
7:0
PRD_STR_LEN
DESCRIPTION
Product String Length
Maximum string length is 31 characters
7.2.1.22
Register 15h: Serial String Length
BIT
NUMBER
BIT NAME
7:0
SER_STR_LEN
DESCRIPTION
Serial String Length
Maximum string length is 31 characters
7.2.1.23
Register 16h-53h: Manufacturer String
BIT
NUMBER
BIT NAME
7:0
MFR_STR
DESCRIPTION
Manufacturer String, UNICODE UTF-16LE per USB 2.0 Specification
Maximum string length is 31 characters (62 bytes)
Note:
Revision 2.8 (09-17-12)
The string consists of individual 16 Bit UNICODE UTF-16LE
characters. The characters will be stored starting with the LSB at
the least significant address and the MSB at the next 8-bit location
(subsequent characters must be stored in sequential contiguous
address in the same LSB, MSB manner). Some EEPROM
programmers may transpose the MSB and LSB, thus reversing the
Byte order. Please pay careful attention to the byte ordering or
your selected programming tools.
28
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.24
Register 54h-91h: Product String
BIT
NUMBER
BIT NAME
7:0
PRD_STR
DESCRIPTION
Product String, UNICODE UTF-16LE per USB 2.0 Specification
Maximum string length is 31 characters (62 bytes)
Note:
7.2.1.25
The string consists of individual 16 Bit UNICODE UTF-16LE
characters. The characters will be stored starting with the LSB at
the least significant address and the MSB at the next 8-bit location
(subsequent characters must be stored in sequential contiguous
address in the same LSB, MSB manner). Some EEPROM
programmers may transpose the MSB and LSB, thus reversing the
Byte order. Please pay careful attention to the byte ordering or
your selected programming tools.
Register 92h-CFh: Serial String
BIT
NUMBER
BIT NAME
7:0
SER_STR
DESCRIPTION
Serial String, UNICODE UTF16LE per USB 2.0 Specification
Maximum string length is 31 characters (62 bytes)
Note:
7.2.1.26
The string consists of individual 16 Bit UNICODE UTF-16LE
characters. The characters will be stored starting with the LSB at
the least significant address and the MSB at the next 8-bit location
(subsequent characters must be stored in sequential contiguous
address in the same LSB, MSB manner). Some EEPROM
programmers may transpose the MSB and LSB, thus reversing the
Byte order. Please pay careful attention to the byte ordering or
your selected programming tools.
Register F6h: Boost_Up
BIT
NUMBER
BIT NAME
7:2
Reserved
1:0
BOOST_IOUT
DESCRIPTION
Reserved
USB electrical signaling drive strength Boost Bit for Upstream Port.
‘00’ = Normal electrical drive strength = No boost
‘01’ = Elevated electrical drive strength = Low (approximately 4% boost)
‘10’ = Elevated electrical drive strength = Medium (approximately 8% boost)
‘11’ = Elevated electrical drive strength = High (approximately 12% boost)
Note:
7.2.1.27
“Boost” could result in non-USB Compliant parameters (one
example would be Test J/K levels), the OEM should use a ‘00’
value unless specific implementation issues require additional
signal boosting to correct for degraded USB signalling levels.
Register F7h: Boost_7:5 (Reset = 0x00)
BIT
NUMBER
SMSC USB2517
BIT NAME
DESCRIPTION
29
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7:6
Reserved
5:4
BOOST_IOUT_7
Reserved
USB electrical signaling drive strength Boost Bit for Downstream Port ‘7’.
‘00’ = Normal electrical drive strength
‘01’ = Elevated electrical drive strength (+4% boost)
‘10’ = Elevated electrical drive strength (+8% boost)
‘11’ = Elevated electrical drive strength (+12% boost)
3:2
BOOST_IOUT_6
USB electrical signaling drive strength Boost Bit for Downstream Port ‘6’.
‘00’ = Normal electrical drive strength
‘01’ = Elevated electrical drive strength (+4% boost)
‘10’ = Elevated electrical drive strength (+8% boost)
‘11’ = Elevated electrical drive strength (+12% boost)
1:0
BOOST_IOUT_5
USB electrical signaling drive strength Boost Bit for Downstream Port ‘5’.
‘00’ = Normal electrical drive strength
‘01’ = Elevated electrical drive strength (+4% boost)
‘10’ = Elevated electrical drive strength (+8% boost)
‘11’ = Elevated electrical drive strength (+12% boost)
7.2.1.28
Register F8h: Boost_4:0
BIT
NUMBER
BIT NAME
DESCRIPTION
7:6
BOOST_IOUT_4
USB electrical signaling drive strength Boost Bit for Downstream Port ‘4’.
‘00’ = Normal electrical drive strength = No boost
‘01’ = Elevated electrical drive strength = Low (approximately 4% boost)
‘10’ = Elevated electrical drive strength = Medium (approximately 8% boost)
‘11’ = Elevated electrical drive strength = High (approximately 12% boost)
Note:
5:4
BOOST_IOUT_3
“Boost” could result in non-USB Compliant parameters (one
example would be Test J/K levels), the OEM should use a ‘00’
value unless specific implementation issues require additional
signal boosting to correct for degraded USB signalling levels.
USB electrical signaling drive strength Boost Bit for Downstream Port ‘3’.
‘00’ = Normal electrical drive strength = No boost
‘01’ = Elevated electrical drive strength = Low (approximately 4% boost)
‘10’ = Elevated electrical drive strength = Medium (approximately 8% boost)
‘11’ = Elevated electrical drive strength = High (approximately 12% boost)
Note:
3:2
BOOST_IOUT_2
“Boost” could result in non-USB Compliant parameters (one
example would be Test J/K levels), the OEM should use a ‘00’
value unless specific implementation issues require additional
signal boosting to correct for degraded USB signalling levels.
USB electrical signaling drive strength Boost Bit for Downstream Port ‘2’.
‘00’ = Normal electrical drive strength = No boost
‘01’ = Elevated electrical drive strength = Low (approximately 4% boost)
‘10’ = Elevated electrical drive strength = Medium (approximately 8% boost)
‘11’ = Elevated electrical drive strength = High (approximately 12% boost)
Note:
Revision 2.8 (09-17-12)
“Boost” could result in non-USB Compliant parameters (one
example would be Test J/K levels), the OEM should use a ‘00’
value unless specific implementation issues require additional
signal boosting to correct for degraded USB signalling levels.
30
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
BIT
NUMBER
BIT NAME
1:0
BOOST_IOUT_1
DESCRIPTION
USB electrical signaling drive strength Boost Bit for Downstream Port ‘1’.
‘00’ = Normal electrical drive strength = No boost
‘01’ = Elevated electrical drive strength = Low (approximately 4% boost)
‘10’ = Elevated electrical drive strength = Medium (approximately 8% boost)
‘11’ = Elevated electrical drive strength = High (approximately 12% boost)
Note:
7.2.1.29
“Boost” could result in non-USB Compliant parameters (one
example would be Test J/K levels), the OEM should use a ‘00’
value unless specific implementation issues require additional
signal boosting to correct for degraded USB signalling levels.
Register FAh: Port Swap
BIT
NUMBER
BIT NAME
DESCRIPTION
7:0
PRTSP
Port Swap: Swaps the Upstream and Downstream USB DP and DM Pins for
ease of board routing to devices and connectors.
‘0’ = USB D+ functionality is associated with the DP pin and D- functionality
is associated with the DM pin.
‘1’ = USB D+ functionality is associated with the DM pin and D- functionality
is associated with the DP pin.
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
SMSC USB2517
7=
6=
5=
4=
3=
2=
1=
0=
’1’;
’1’;
’1’;
‘1’;
‘1’;
‘1’;
‘1’;
‘1’;
Port 7 DP/DM is swapped.
Port 6 DP/DM is swapped.
Port 5 DP/DM is swapped.
Port 4 DP/DM is swapped.
Port 3 DP/DM is swapped.
Port 2 DP/DM is swapped.
Port 1 DP/DM is swapped.
Upstream Port DP/DM is swapped
31
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.30
Register FBh: Port Remap 12
BIT
NUMBER
BIT NAME
7:0
PRTR12
DESCRIPTION
Port remap register for ports 1 & 2
When a hub is enumerated by a USB Host Controller, the hub is only
permitted to report how many ports it has; the hub is not permitted to select
a numerical range or assignment. The Host Controller will number the
downstream ports of the hub starting with the number '1', up to the number
of ports that the hub recognizes.
The host's port number is referred to as "Logical Port Number" and the
physical port on the hub is the “Physical Port Number". When remapping
mode is enabled (see PRTMAP_EN in Register 08h: Configuration Data
Byte 3) the hub's downstream port numbers can be remapped to different
logical port numbers (assigned by the host).
Note:
The OEM must ensure that Contiguous Logical Port Numbers are
used, starting from #1 up to the maximum number of enabled ports;
this ensures that the hub's ports are numbered in accordance with
the way a Host will communicate with the ports.
Table 7.2 Port Remap Register for Ports 1 & 2
Bit [7:4]
Bit [3:0]
Revision 2.8 (09-17-12)
‘0000’
Physical Port 2 is Disabled
‘0001’
Physical Port 2 is mapped to Logical Port 1
‘0010’
Physical Port 2 is mapped to Logical Port 2
‘0011’
Physical Port 2 is mapped to Logical Port 3
‘0100’
Physical Port 2 is mapped to Logical Port 4
‘0101’
Physical Port 2 is mapped to Logical Port 5
‘0110’
Physical Port 2 is mapped to Logical Port 6
‘0111’
Physical Port 2 is mapped to Logical Port 7
‘1000’
to
‘1111’
Reserved, will default to ‘0000’ value
‘0000’
Physical Port 1 is Disabled
‘0001’
Physical Port 1 is mapped to Logical Port 1
‘0010’
Physical Port 1 is mapped to Logical Port 2
‘0011’
Physical Port 1 is mapped to Logical Port 3
‘0100’
Physical Port 1 is mapped to Logical Port 4
‘0101’
Physical Port 1 is mapped to Logical Port 5
‘0110’
Physical Port 1 is mapped to Logical Port 6
‘0111’
Physical Port 1 is mapped to Logical Port 7
‘1000’
to
‘1111’
Reserved, will default to ‘0000’ value
32
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.31
Register FCh: Port Remap 34
BIT
NUMBER
BIT NAME
7:0
PRTR34
DESCRIPTION
Port remap register for ports 3 & 4
When a hub is enumerated by a USB Host Controller, the hub is only
permitted to report how many ports it has; the hub is not permitted to select
a numerical range or assignment. The Host Controller will number the
downstream ports of the hub starting with the number '1', up to the number
of ports that the hub recognizes.
The host's port number is referred to as "Logical Port Number" and the
physical port on the hub is the “Physical Port Number". When remapping
mode is enabled (see PRTMAP_EN in Register 08h: Configuration Data
Byte 3) the hub's downstream port numbers can be remapped to different
logical port numbers (assigned by the host).
Note:
The OEM must ensure that Contiguous Logical Port Numbers are
used, starting from #1 up to the maximum number of enabled ports;
this ensures that the hub's ports are numbered in accordance with
the way a Host will communicate with the ports.
Table 7.3 Port Remap Register for Ports 3 & 4
Bit [7:4]
Bit [3:0]
SMSC USB2517
‘0000’
Physical Port 4 is Disabled
‘0001’
Physical Port 4 is mapped to Logical Port 1
‘0010’
Physical Port 4 is mapped to Logical Port 2
‘0011’
Physical Port 4 is mapped to Logical Port 3
‘0100’
Physical Port 4 is mapped to Logical Port 4
‘0101’
Physical Port 4 is mapped to Logical Port 5
‘0110’
Physical Port 4 is mapped to Logical Port 6
‘0111’
Physical Port 4 is mapped to Logical Port 7
‘1000’
to
‘1111’
Reserved, will default to ‘0000’ value
‘0000’
Physical Port 3 is Disabled
‘0001’
Physical Port 3 is mapped to Logical Port 1
‘0010’
Physical Port 3 is mapped to Logical Port 2
‘0011’
Physical Port 3 is mapped to Logical Port 3
‘0100’
Physical Port 3 is mapped to Logical Port 4
‘0101’
Physical Port 3 is mapped to Logical Port 5
‘0110’
Physical Port 3 is mapped to Logical Port 6
‘0111’
Physical Port 3 is mapped to Logical Port 7
‘1000’
to
‘1111’
Reserved, will default to ‘0000’ value
33
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.32
Register FDh: Port Remap 56 (Reset = 0x00)
Revision 2.8 (09-17-12)
34
DATASHEET
SMSC USB2517
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
BIT
NUMBER
BIT NAME
7:0
PRTR56
DESCRIPTION
Port remap register for ports 5 & 6.
When a hub is enumerated by a USB Host Controller, the hub is only
permitted to report how many ports it has; the hub is not permitted to select
a numerical range or assignment. The Host Controller will number the
downstream ports of the hub starting with the number '1', up to the number
of ports that the hub recognizes.
The host's port number is referred to as "Logical Port Number" and the
physical port on the hub is the “Physical Port Number". When remapping
mode is enabled (see PRTMAP_EN in Register 08h: Configuration Data
Byte 3) the hub's downstream port numbers can be remapped to different
logical port numbers (assigned by the host).
Note:
The OEM must ensure that Contiguous Logical Port Numbers are
used, starting from #1 up to the maximum number of enabled ports;
this ensures that the hub's ports are numbered in accordance with
the way a Host will communicate with the ports.
Table 7.4 Port Remap Register for Ports 5 & 6
Bit [7:4]
Bit [3:0]
SMSC USB2517
‘0000’
Physical Port 6 is Disabled
‘0001’
Physical Port 6 is mapped to Logical Port 1
‘0010’
Physical Port 6 is mapped to Logical Port 2
‘0011’
Physical Port 6 is mapped to Logical Port 3
‘0100’
Physical Port 6 is mapped to Logical Port 4
‘0101’
Physical Port 6 is mapped to Logical Port 5
‘0110’
Physical Port 6 is mapped to Logical Port 6
‘0111’
Physical Port 6 is mapped to Logical Port 7
‘1000’
to
‘1111’
Reserved, will default to ‘0000’ value
‘0000’
Physical Port 3 is Disabled
‘0001’
Physical Port 5 is mapped to Logical Port 1
‘0010’
Physical Port 5 is mapped to Logical Port 2
‘0011’
Physical Port 5 is mapped to Logical Port 3
‘0100’
Physical Port 5 is mapped to Logical Port 4
‘0101’
Physical Port 5 is mapped to Logical Port 5
‘0110’
Physical Port 5 is mapped to Logical Port 6
‘0111’
Physical Port 5 is mapped to Logical Port 7
‘1000’
to
‘1111’
Reserved, will default to ‘0000’ value
35
DATASHEET
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.33
Register FEh: Port Remap 7 (Reset = 0x00)
BIT
NUMBER
BIT NAME
7:0
PRTR7
DESCRIPTION
Port remap register for ports 7.
When a hub is enumerated by a USB Host Controller, the hub is only
permitted to report how many ports it has; the hub is not permitted to select
a numerical range or assignment. The Host Controller will number the
downstream ports of the hub starting with the number '1', up to the number
of ports that the hub recognizes.
The host's port number is referred to as "Logical Port Number" and the
physical port on the hub is the “Physical Port Number". When remapping
mode is enabled (see PRTMAP_EN in Register 08h: Configuration Data
Byte 3) the hub's downstream port numbers can be remapped to different
logical port numbers (assigned by the host).
Note:
The OEM must ensure that Contiguous Logical Port Numbers are
used, starting from #1 up to the maximum number of enabled ports;
this ensures that the hub's ports are numbered in accordance with
the way a Host will communicate with the ports.
Table 7.5 Port Remap Register for Port 7
Revision 2.8 (09-17-12)
Bit [7:4]
‘0000’
to
‘1111’
Reserved
Bit [3:0]
‘0000’
Physical Port 7 is Disabled
‘0001’
Physical Port 7 is mapped to Logical Port 1
‘0010’
Physical Port 7 is mapped to Logical Port 2
‘0011’
Physical Port 7 is mapped to Logical Port 3
‘0100’
Physical Port 7 is mapped to Logical Port 4
‘0101’
Physical Port 7 is mapped to Logical Port 5
‘0110’
Physical Port 7 is mapped to Logical Port 6
‘0111’
Physical Port 7 is mapped to Logical Port 7
‘1000’
to
‘1111’
Reserved, will default to ‘0000’ value
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.2.1.34
Register FFh: Status/Command
BIT
NUMBER
BIT NAME
7:3
Reserved
2
INTF_PW_DN
DESCRIPTION
Reserved
SMBus Interface Power Down
‘0’ = Interface is active
‘1’ = Interface power down after ACK has completed
1
RESET
Reset the SMBus Interface and internal memory back to RESET_N
assertion default settings.
‘0’ = Normal Run/Idle State
‘1’ = Force a reset of registers to their default state
0
USB_ATTACH
USB Attach (and write protect)
‘0’ = SMBus slave interface is active
‘1’ = Hub will signal a USB attach event to an upstream device. The internal
memory (address range 00h-FEh) is “write-protected” to prevent
unintentional data corruption.
7.2.2
I2C EEPROM
The I2C EEPROM interface implements a subset of the I2C Master Specification (Please refer to the Philips
Semiconductor Standard I2C-Bus Specification for details on I2C bus protocols). The Hub’s I2C EEPROM interface
is designed to attach to a single “dedicated” I2C EEPROM, and conforms to the Standard-mode I2C Specification
(100kbit/s transfer rate and 7-bit addressing) for protocol and electrical compatibility.
Note: Extensions to the I2C Specification are not supported.
The Hub acts as the master and generates the serial clock SCL, controls the bus access (determines which device
acts as the transmitter and which device acts as the receiver), and generates the START and STOP conditions.
7.2.2.1
Implementation Characteristics
The Hub will only access an EEPROM using the Sequential Read Protocol.
7.2.2.2
Pull-Up Resistor
The Circuit board designer is required to place external pull-up resistors (10KΩ recommended) on the
SDA/SMBDATA & SCL/SMBCLK/CFG_SELO lines (per SMBus 1.0 Specification, and EEPROM manufacturer
guidelines) to Vcc in order to assure proper operation.
7.2.2.3
I2C EEPROM Slave Address
Slave address is 1010000.
Note: 10-bit addressing is NOT supported.
7.2.3
In-Circuit EEPROM Programming
The EEPROM can be programmed via ATE by pulling RESET_N low (which tri-states the Hub’s EEPROM interface
and allows an external source to program the EEPROM).
7.3
SMBus Slave Interface
Instead of loading User-Defined Descriptor data from an external EEPROM, the SMSC Hub can be configured to
receive a code load from an external processor via an SMBus interface. The SMBus interface shares the same pins
as the EEPROM interface; if CFG_SEL1 & CFG_SEL0 activates the SMBus interface, external EEPROM support is
no longer available (and the user-defined descriptor data must be downloaded via the SMBus). Due to system issues,
the SMSC Hub waits indefinitely for the SMBus code load to complete and only “appears” as a newly connected
device on USB after the code load is complete.
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
The Hub’s SMBus implementation is a subset of the SMBus interface to the host. The device is a slave-only SMBus
device. The implementation in the device is a subset of SMBus since it only supports two protocols.
The Write Block and Read Block protocols are the only valid SMBus protocols for the Hub. The Hub responds to
other protocols as described in Section 7.3.2, "Invalid Protocol Response Behavior," on page 39. Reference the
System Management Bus Specification, Rev 1.0.
The SMBus interface is used to read and write the registers in the device. The register set is shown in Section 7.2.1,
"Internal Register Set (Common to EEPROM and SMBus)," on page 19.
7.3.1
Bus Protocols
Typical Write Block and Read Block protocols are shown below. Register accesses are performed using 7-bit slave
addressing, an 8-bit register address field, and an 8-bit data field. The shading indicates the Hub driving data on the
SMBDATA line; otherwise, host data is on the SDA/SMBDATA line.
The slave address is the unique SMBus Interface Address for the Hub that identifies it on SMBus. The register
address field is the internal address of the register to be accessed. The register data field is the data that the host
is attempting to write to the register or the contents of the register that the host is attempting to read.
Note: Data bytes are transferred MSB first (msb first).
7.3.1.1
Block Read/Write
The Block Write begins with a slave address and a write condition. After the command code, the host issues a byte
count which describes how many more bytes will follow in the message. If a slave had 20 bytes to send, the first
byte would be the number 20 (14h), followed by the 20 bytes of data. The byte count may not be 0. A Block Read
or Write is allowed to transfer a maximum of 32 data bytes.
Note: For the following SMBus tables:
Denotes Master-to-Slave
Denotes Slave-to-Master
1
7
1
1
S
Slave Address
Wr
A
8
1
Register Address
A
...
8
1
8
1
8
1
8
1
1
Byte Count = N
A
Data byte 1
A
Data byte 2
A
Data byte N
A
P
Block Write
Figure 7.1 Block Write
Block Read
A Block Read differs from a block write in that the repeated start condition exists to satisfy the I2C specification’s
requirement for a change in the transfer direction.
1
S
7
Slave Address
1
1
8
1
1
7
1
1
Wr
A
Register Address
A
S
Slave Address
Rd
A
...
8
1
8
1
8
1
8
1
1
Byte Count = N
A
Data byte 1
A
Data byte 2
A
Data byte N
A
P
Block Read
Figure 7.2 Block Read
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.3.2
Invalid Protocol Response Behavior
Registers accessed with an invalid protocol are not updated. A register is only updated following a valid protocol.
The only valid protocols are Write Block and Read Block, which are described above.
The Hub only responds to the hardware selected Slave Address.
Attempting to communicate with the Hub over SMBus with an invalid slave address or invalid protocol results in no
response, and the SMBus Slave Interface returns to the idle state.
The only valid registers that are accessible by the SMBus slave address are the registers defined in the Registers
Section. See Section 7.3.3 for the response to undefined registers.
7.3.3
General Call Address Response
The Hub does not respond to a general call address of 0000_000b.
7.3.4
Slave Device Time-Out
According to the SMBus Specification, V1.0 devices in a transfer can abort the transfer in progress and release the
bus when any single clock low interval exceeds 25ms (TTIMEOUT, MIN). Devices that have detected this condition must
reset their communication and be able to receive a new START condition no later than 35ms (TTIMEOUT, MAX).
Note: Some simple devices do not contain a clock low drive circuit; this simple kind of device typically
resets its communications port after a start or stop condition. The Slave Device Time-Out must
be implemented.
7.3.5
Stretching the SCLK Signal
The Hub supports stretching of the SCLK by other devices on the SMBus. The Hub does not stretch the SCLK.
7.3.6
SMBus Timing
The SMBus Slave Interface complies with the SMBus AC Timing Specification. See the SMBus timing in the “Timing
Diagram” section.
7.3.7
Bus Reset Sequence
The SMBus Slave Interface resets and returns to the idle state upon a START field followed immediately by a STOP
field.
7.3.8
SMBus Alert Response Address
The SMBALERT# signal is not supported by the Hub.
7.3.8.1
Undefined Registers
The registers shown in Table 7.1 are the defined registers in the Hub. Reads to undefined registers return to 00h.
Writes to undefined registers have no effect and do not return an error.
7.3.8.2
Reserved Registers
Unless otherwise instructed, only a ‘0’ may be written to all reserved registers or bits.
7.4
Default Configuration Option:
The SMSC Hub can be configured via its internal default configuration. (Please see Section 7.2.1, "Internal Register
Set (Common to EEPROM and SMBus)" for specific details on how to enable default configuration.)
Please refer to Table 7.1 for the internal default values that are loaded when this option is selected.
7.5
Default Strapping Options:
The USB2517 can be configured via a combination of internal default values and pin strap options. Please see
Table 5.1, "PIN Descriptions" and Table 5.2, "USB2517 SMBUS or EEPROM Interface Behavior" for specific details
on how to enable the default/pin-strap configuration option.
The strapping option pins only cover a limited sub-set of the configuration options. The internal default values will be
used for the bits & registers that are not controlled by a strapping option pin. Please refer to Table 7.1 for the internal
default values that are loaded when this option is selected.
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USB 2.0 Hi-Speed 7-Port Hub Controller
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The Amber and Green LED pins are sampled after RESET_N negation, and the logic values are used to configure
the hub if the internal default configuration mode is selected. The implementation shown below (see Figure 7.3)
shows a recommended passive scheme. When a pin is configured with a “Strap High” configuration, the LED
functions with active low signalling, and the PAD will “sink” the current from the external supply. When a pin is
configured with a “Strap Low” configuration, the LED functions with active high signalling, and the PAD will “source”
the current to the external LED.
+V
Strap High
100K
LED
LED
Pin
HUB
LED
Pin
Strap Low
100K
LED
Figure 7.3 LED Strapping Option
7.6
Reset
There are two different resets that the Hub experiences. One is a hardware reset (either from the internal POR reset
circuit or via the RESET_N pin) and the second is a USB Bus Reset.
7.6.1
Internal POR Hardware Reset
All reset timing parameters are guaranteed by design.
7.6.2
External Hardware RESET_N
A valid hardware reset is defined as assertion of RESET_N for a minimum of 1us after all power supplies are within
operating range. While reset is asserted, the Hub (and its associated external circuitry) consumes less than 500μA
of current from the upstream USB power source.
Assertion of RESET_N (external pin) causes the following:
1. All downstream ports are disabled, and PRTPWR power to downstream devices is removed.
2. The PHYs are disabled, and the differential pairs will be in a high-impedance state.
3. All transactions immediately terminate; no states are saved.
4. All internal registers return to the default state (in most cases, 00(h)).
5. The external crystal oscillator is halted.
6. The PLL is halted.
7. LED indicators are disabled.
The Hub is “operational” 500μs after RESET_N is negated.
Once operational, the Hub immediately reads OEM-specific data from the external EEPROM (if the SMBus option is
not disabled).
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.6.2.1
RESET_N for Strapping Option Configuration
Hardware
reset
asserted
Drive Strap
Outputs to
inactive
levels
Read Strap
Options
t1
Attach
USB
Upstream
USB Reset
recovery
t5
Start
completion
request
response
Idle
t7
t6
t8
t2
t3
RESET_N
VSS
t4
Strap Pins
Don’t Care
Valid
Driven by Hub if strap is an output.
Don’t Care
VSS
Figure 7.4 Reset_N Timing for Default/Strap Option Mode
Table 7.6 Reset_N Timing for Default/Strap Option Mode
NAME
DESCRIPTION
MIN
TYP
MAX
UNITS
1
μsec
Strap Setup Time
16.7
nsec
t3
Strap Hold Time.
16.7
t4
hub outputs driven to inactive logic states
t5
USB Attach (See Note).
t6
Host acknowledges attach and signals USB
Reset.
t7
USB Idle.
t8
Completion time for requests (with or without data
stage).
t1
RESET_N Asserted.
t2
1.5
1400
nsec
2
μsec
100
msec
100
msec
undefined
msec
5
msec
Notes:
When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than
100mA from the upstream USB power source during t1+t5.
All Power Supplies must have reached the operating levels mandated in Chapter 8, DC
Parameters, prior to (or coincident with) the assertion of RESET_N.
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
7.6.2.2
RESET_N for EEPROM Configuration
Hardware
reset
asserted
Attach
USB
Upstream
Read EEPROM
+
Set Options
Read Strap
Options
USB Reset
recovery
Start
completion
request
response
Idle
t4
t1
t2
t5
t3
t6
t7
RESET_N
VSS
Figure 7.5 Reset_N Timing for EEPROM Mode
Table 7.7 Reset_N Timing for EEPROM Mode
NAME
DESCRIPTION
MIN
t1
RESET_N Asserted.
t2
Hub Recovery/Stabilization.
t3
EEPROM Read / Hub Config.
t4
USB Attach (See Note).
t5
Host acknowledges attach and signals USB
Reset.
t6
USB Idle.
t7
Completion time for requests (with or without data
stage).
TYP
MAX
UNITS
μsec
1
2.0
500
μsec
99.5
msec
100
msec
100
msec
undefined
msec
5
msec
Notes:
When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than
100mA from the upstream USB power source during t4+t5+t6+t7.
All Power Supplies must have reached the operating levels mandated in Chapter 8, DC
Parameters, prior to (or coincident with) the assertion of RESET_N.
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
RESET_N for SMBus Slave Configuration
7.6.2.3
Hardware
reset
asserted
Reset
Negation
SMBus Code
Load
t1
t2
Hub PHY
Stabilization
Attach
USB
Upstream
t3
t4
USB Reset
recovery
Start
completion
request
response
Idle
t6
t5
t7
RESET_N
VSS
Figure 7.6 Reset_N Timing for SMBus Mode
Table 7.8 Reset_N Timing for SMBus Mode
NAME
DESCRIPTION
MIN
t1
RESET_N Asserted.
t2
Hub Recovery/Stabilization.
t3
SMBus Code Load (See Note).
t4
Hub Configuration and USB Attach.
t5
Host acknowledges attach and signals USB
Reset.
t6
USB Idle.
t7
Completion time for requests (with or without data
stage).
TYP
MAX
UNITS
μsec
1
250
500
μsec
300
msec
100
msec
100
msec
Undefined
msec
5
msec
Notes:
7.6.3
For Bus-Powered configurations, the 99.5ms (MAX) is required, and the Hub and its associated
circuitry must not consume more than 100mA from the upstream USB power source during
t2+t3+t4+t5+t6+t7. For Self-Powered configurations, t3 MAX is not applicable and the time to load
the configuration is determined by the external SMBus host.
All Power Supplies must have reached the operating levels mandated in Chapter 8, DC
Parameters, prior to (or coincident with) the assertion of RESET_N.
USB Bus Reset
In response to the upstream port signaling a reset to the Hub, the Hub does the following:
Note: The Hub does not propagate the upstream USB reset to downstream devices.
1. Sets default address to 0.
2. Sets configuration to: Unconfigured.
3. Negates PRTPWR[7:1] to all downstream ports.
4. Clears all TT buffers.
5. Moves device from suspended to active (if suspended).
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Datasheet
6. Complies with Section 11.10 of the USB 2.0 Specification for behavior after completion of the reset
sequence.
The Host then configures the Hub and the Hub’s downstream port devices in accordance with the USB Specification.
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Chapter 8 DC Parameters
8.1
Maximum Guaranteed Ratings
PARAMETER
SYMBOL
MIN
MAX
UNITS
Storage
Temperature
TSTOR
-55
150
°C
325
°C
Lead
Temperature
1.8V supply
voltage
VDDA18PLL,
VDD18
2.5
V
3.3V supply
voltage
VDDA33,
VDD33PLL,
VDD33,
VDD33CR
4.6
V
Voltage on any
I/O pin
-0.5
5.5
V
Voltage on
XTAL1
-0.5
4.0
V
Voltage on
XTAL2
-0.5
3.6
V
8.2
COMMENTS
Soldering < 10 seconds
Note 8.1
Stresses above the specified parameters could cause permanent damage to the device.
This is a stress rating only and functional operation of the device at any condition above
those indicated in the operation sections of this specification is not implied.
Note 8.2
When powering this device from laboratory or system power supplies, it is important that
the Absolute Maximum Ratings not be exceeded or device failure can result. Some power
supplies exhibit voltage spikes on their outputs when the AC power is switched on or off.
In addition, voltage transients on the AC power line may appear on the DC output. When
this possibility exists, it is suggested that a clamp circuit be used.
Operating Conditions
PARAMETER
SYMBOL
MIN
MAX
UNITS
COMMENTS
Operating
Temperature
TA
0
70
°C
Ambient temperature in still air.
1.8V supply voltage
VDDA18PLL
VDD18
1.62
1.98
V
3.3V supply voltage
VDDA33
VDDA33PLL
VDD33
VDD33CR
3.0
3.6
V
3.3V supply rise time
tRT
400
μs
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(See Figure 8.1, "Supply Rise
Time Model")
Revision 2.8 (09-17-12)
USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
PARAMETER
SYMBOL
Voltage on any I/O pin
MIN
MAX
UNITS
COMMENTS
-0.3
5.5
V
If any 3.3V supply voltage drops
b e l o w 3 . 0 V, t h e n t h e M A X
becomes:
(3.3V supply voltage) + 0.5
Voltage on XTAL1
-0.3
VDD33
V
Voltage on XTAL2
-0.3
VDD18
V
Voltage
tRT
VDD33
3.3V
100%
90%
VSS
10%
t90%
t10%
Time
Figure 8.1 Supply Rise Time Model
Table 8.1 DC Electrical Characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
0.8
V
COMMENTS
I, IS Type Input Buffer
Low Input Level
VILI
High Input Level
VIHI
2.0
IIL
-10
+10
uA
VHYSI
250
350
mV
0.8
V
Input Leakage
Hysteresis (‘IS’ Only)
TTL Levels
V
VIN = 0 to VDD33
Input Buffer with Pull-Up
(IPU)
TTL Levels
Low Input Level
VILI
High Input Level
VIHI
2.0
Low Input Leakage
IILL
+35
+90
uA
VIN = 0
High Input Leakage
IIHL
-10
+10
uA
VIN = VDD33
0.8
V
TTL Levels
V
Input Buffer with PullDown (IPD)
Low Input Level
VILI
High Input Level
VIHI
2.0
Low Input Leakage
IILL
+10
-10
uA
VIN = 0
High Input Leakage
IIHL
-35
-90
uA
VIN = VDD33
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Table 8.1 DC Electrical Characteristics (continued)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
0.5
V
COMMENTS
ICLK Input Buffer
Low Input Level
VILCK
High Input Level
VIHCK
1.4
IIL
-10
Input Leakage
V
+10
uA
VIN = 0 to VDD33
0.4
V
IOL = 12mA @ VDD33 = 3.3V
V
IOH = -12mA @ VDD33 = 3.3V
VIN = 0 to VDD33
(Note 8.3)
O12, I/O12 & I/OSD12
Type Buffer
Low Output Level
VOL
High Output Level
VOH
2.4
Output Leakage
IOL
-10
+10
uA
VHYSC
250
350
mV
Hysteresis (‘SD’ pad only)
IO-U
(Note 8.4)
Supply Current
Unconfigured
Hi-Speed Host
Full-Speed Host
ICCINTHS
ICCINITFS
95
95
mA
mA
All supplies combined
Supply Current
Configured
(Hi-Speed Host) (Note 8.5)
1
2
2
4
7
Port HS, 1 Port LS/FS
Ports @ LS/FS
Ports @ HS
Ports @ HS
Ports @ HS
IHCH1C1
IHCC2
IHCH2
IHCH4
IHCH7
230
230
270
330
420
460
mA
mA
mA
mA
mA
Supply Current
Configured
(Full-Speed Host)
1
2
3
4
7
Port
Ports
Ports
Ports
Ports
All supplies combined
IFCC1
IFCC2
IFCC3
IFCC4
IFCC7
205
210
215
220
235
270
mA
mA
mA
mA
mA
Supply Current
Suspend
ICSBY
360
610
μA
All supplies combined
Supply Current
Reset
ICRST
110
400
μA
All supplies combined
Note 8.3
Output leakage is measured with the current pins in high impedance.
Note 8.4
See USB 2.0 Specification for USB DC electrical characteristics.
Note 8.5
Max supply current was measured under ICH10 EHCI controller while transferring files in
Windows7 using fastest available HDs, at VDD=3.3V+20% and T (case) temperature -55C.
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
CAPACITANCE TA = 25°C; fc = 1MHz; VDD18, VDDPLL = 1.8V
Table 8.2 Pin Capacitance
LIMITS
PARAMETER
Clock Input
Capacitance
Input Capacitance
Output Capacitance
Revision 2.8 (09-17-12)
SYMBOL
MIN
TYP
MAX
UNIT
TEST CONDITION
CXTAL
2
pF
All pins except USB pins (and pins under
test tied to AC ground)
CIN
10
pF
COUT
20
pF
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USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
Chapter 9 AC Specifications
9.1
Oscillator/Clock
Crystal: Parallel Resonant, Fundamental Mode, 24 MHz ±350ppm.
External Clock: 50% Duty cycle ± 10%, 24 MHz ± 350ppm, Jitter < 100ps rms.
XTAL1
(C S 1 =
C B + C XTAL )
C1
C ry s ta l
1M eg
CL
C2
XTAL2
(C S 2 =
C B + C XTAL )
Figure 9.1 Typical Crystal Circuit
Note: CB equals total board/trace capacitance.
(C1 + CS1) x (C2 + CS2)
= CL
(C1 + CS1 + C2 + CS2)
Figure 9.2 Formula to find value of C1 and C2
9.1.1
SMBus Interface:
The SMSC Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the SMBus
1.0 Specification for Slave-Only devices (except as noted in Section 7.3, "SMBus Slave Interface").
9.1.2
I2C EEPROM:
Frequency is fixed at 58.6KHz ± 20%.
9.1.3
USB 2.0
The SMSC Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the USB
2.0 Specification. Please refer to the USB 2.0 Specification for more information.
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SMSC USB2517
Figure 10.1 64-Pin QFN, 9x9mm Body, 0.5mm Pitch
Datasheet
Revision 2.8 (09-17-12)
Chapter 10 Package Outline
Source Exif Data:
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