Atmel C51 Users Manual Microcontrollers Demo Board

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C51 Microcontrollers Demo Board
..............................................................................................

User Guide

Table of Contents

Section 1
Introduction ........................................................................................... 1-2
1.1
1.2

C51/C251 Support ....................................................................................1-2
Demo Board Features...............................................................................1-3

Section 2
Hardware Description ........................................................................... 2-4
2.1
2.2
2.3
2.4
2.5
2.6

Block Diagram...........................................................................................2-4
Specifications ............................................................................................2-4
Supported Microcontrollers .......................................................................2-4
Board Supply Considerations....................................................................2-5
Board Layout.............................................................................................2-6
J11 Switches .............................................................................................2-7

Section 3
Operation Mode .................................................................................. 3-10
3.1

Flash Products ........................................................................................3-10

3.1.1

Switch Configuration.........................................................................3-10

3.1.2

Running ISP .....................................................................................3-10

3.2

ISP External Flash Memory Mode ..........................................................3-11

3.2.1

Hardware Configuration....................................................................3-11

3.2.2

Terminal Configuration .....................................................................3-11

3.2.3

ISP Operation ...................................................................................3-11

3.3

Demo Mode ............................................................................................3-14

3.3.1

C51 Mode .........................................................................................3-14

3.3.2

C251 Mode .......................................................................................3-15

Section 4
Bill of Material ..................................................................................... 4-16
Section 5
Schematics ......................................................................................... 5-18

C51 Microcontrollers Demo Board User Guide

i
4119C–8051–3/03

Introduction

Section 1
Introduction
The C51/C251 Demo Board allows easy evaluation of most of Atmel C51/C251 devices.
The C51/C251 Demo Board can be powered using a simple 9V battery or using a 9V
rechargeable battery. The C51/C251 Demo Board can also be used as programming
tool for Flash products.

1.1

Package
Contents

n One PCB C51/C251 Demo Board (with battery connector)
n One Serial cable (1.8m length)
Figure 1-1. C51/C251 Demo Board

1.2

On-line Utilities

The following utilies involved in using the C51/C251 Demo Board are available on the
Atmel Web site http://www.atmel.com.
Search for DEMOBOARD1.

n FLIP: In-System Programming (ISP) software for Flash microcontrollers
n ISP Demo Board Source and Code to program external Flash memory
n Source and Code of demo software

C51 Microcontrollers Demo Board User Guide

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Introduction

1.3

Support

Questions can be sent to: mcu@atmel.com

1.4

Demo Board
Features

n An LCD Display (2 lines of 16 characters)
n An Eight LED Bar Graph
n 128 KB Flash Memory
n Three Different Sockets: PLCC44, PLCC68 & DIL24
n In-System Programming (ISP) Software to Download HEX Files in Flash Memory
n Hardware Capability to Program the Microcontrollers On-Chip Flash Memory
n Extension Connectors for Special Features, Applications, New Products, or Demos

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C51 Microcontrollers Demo Board User Guide

Hardware Description

Section 2
Hardware Description

2.1

Block Diagram

Figure 2-1. Block Diagram
Synchro connectors

RS232

Reset & INT1#

C51/C251

Bargraph

LCD 2*16

Glue
128 K Flash memory

To All

Config switches

Extensions
connector

Power
interface

2.2

Specifications
Parameter

2.3

Supported
Microcontrollers

Typ

Max

Unit

Supply DC voltage

9

12

V

Supply DC current

200

Consumption at 12 MHz

60

100

mA

Consumption at 60 MHz in X2 mode

110

150

mA

non-rechargeable battery capacity

550

mAh

Rechargeable battery capacity

150

mAh

mA

Most Atmel C51 and C251 microcontrollers are supported.
The Demo Board does not support low voltage parts, only 5V parts are supported.

C51 Microcontrollers Demo Board User Guide

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Hardware Description

2.4

Board Supply
Considerations

n Power connector J1 or battery connector J2 may be used to power the board.
n On J2 connector a rechargeable battery or a non-rechargeable battery may be used.
n In case of rechargeable battery usage on J2, if J18 is ON the battery is charged when
the board is powered by J1.
n Board may be powered by J2 for about 10 hours with one new non-rechargeable
battery.
Note: J18 must be Off, when the board is powered by J1 with a non-rechargeable
battery connected on J2 (see figure 3).

Figure 2-2. C51/C251 Demo Board powered by J1 with a non-rechargeable battery on J2
AC-DC

LCD display

J1 Power Supply Connector
9V to 12V DC IN

J2

J18

OFF
non-rechargeable
battery

9V
PP3

Figure 2-3. C51/C251 Demo Board powered by J1 with a rechargeable battery on J2

J1 Power Supply Connector
AC-DC

LCD display

9V to 12V DC IN

J2

J18

ON
rechargeable
battery

9V
PP3
In this configuration
battery is being charged

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C51 Microcontrollers Demo Board User Guide

Hardware Description

Figure 2-4. C51/C251 Demo Board Powered by J2.

LCD display

J1 Power Supply Connector
NOT USED

J2

J18

battery
(rechargeable or not)

2.5

Board Layout

ON

9V
PP3

n On-Off
–

Switches ON the power supply.

n Reset
–

Resets the microcontrollers.

n INT1#
–

Issues an interruption on microcontollers on INT1# pin.

n J8 Connector
–

Configure hardware in Page Mode or Non Page Mode.

–

for C251 microcontrollers. For C51 products, the configuration must be set to
Non Page Mode.

n Synchro IN
–

Used to connect several C51/C251 Demo Boards together, provides global
reset / interrupt for all connected C51/C251 Demo Boards.

n Synchro OUT
–

Only one power supply is needed but it may be able to deliver enough
current to supply all the C51/C251 Demo Boards.

–

There are no rules to connect two boards together anyone of the two DB9
may be used.

n RS232
–

Used to connect a terminal or through an RS232 serial communication port.

–

This serial port can be used for displaying messages or for programming
external Flash memory.

Note:

The cable that connect this RS232 Connector MUST be a pin to pin cable.

C51 Microcontrollers Demo Board User Guide

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Hardware Description

Figure 2-5. C51/C251 Demo Board
RS232 Cable to Terminal

RS232
R21

+ LCD CTRST

LCD
J11

J17
OFF

Synchro IN

ON

RESET

Synchro OUT
J8
J9

INT1

J16

1

1

Page Mode

1

X2

PLCC44

J8

X1
X3

Non Page Mode
DIL24

PLCC68
Extension connector

2.6

J11 Switches

Table 1. J11 Switches
7

6

5

4

3

2

1

0

ISP

ALE

PSEN

UC4

UC3

UC2

UC1

UC0

Bit
Number

Bit
Mnemonic Description
In-System Programming (external Flash memory)

7

ISP1

Set to enable external Flash memory programming
Clear to protect external Flash memory from erasure and programming
Address Latch Enable

6

ALE

Set to see ALE activity
Clear to ground ALE
Program Store Enable

5

PSEN

Set to run demos
Clear to program T89C51RD2 on-chip Flash memory

4-0

UC4:0

User Code
Free of use as data input for demos.

(Set=1, Clear=0)

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C51 Microcontrollers Demo Board User Guide

Hardware Description

Table 2. J9 Switches

Bit
Number

0

MAP SELECT

EA

Bit
Mnemonic Description
MAP
SELECT

1

1

Map Select
Set to select external Flash memory zone from $10000 to $1FFFF
Clear to select external Flash memory zone from $00000 to $0FFFF
External Address

0

EA

Set to fetch internal code (on chip code).
Clear to fetch code from external Flash memory

Table 3. J16 Switches
0
ISP2
Bit
Number

Bit
Mnemonic Description
In System Programming 2 (external Flash memory)

0

ISP2

RESERVED
MUST BE OFF (set to 1)

Figure 2-6. Switch Configuration
RS232 Cable to PC
J11
User Code

0

PSEN
ALE
ISP1

J11

7
1

J9

J9

Set = 1
Clear = 0

1

0

0
EA
MAP SELECT

J16

OFF

ISP2

J16

Socket and Quartz Crystal

The C51/C251 Demo Board provides three different sockets for microcontrollers, a
PLCC44, a PLCC68 and a DIL24.
Each socket has it own quartz crystal X1, X2 and X3.
Only one Atmel microcontroller must be plugged-in at one time, in one of the three
sockets.
Crystal may be easily changed on each socket.

C51 Microcontrollers Demo Board User Guide

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Operation Mode

Section 3
Operation Mode

3.1

Flash Products

3.1.1

Switch
Configuration

To program the on-chip Flash memory, hardware configuration of the chip should be the
following: PSEN = 0, EA = 1 and ALE = 1 or not connected.
On C51/C251 Demo Board, switches must be as shown on Figure 3-2.

Figure 3-1. C51/C251 Demo Board Switches Configuration to use ISP
RS232 Cable to PC
Position don’t care

J11
User Code

Position needed

PSEN
ALE
ISP1

J11

1

J9

J9

1

0

0
EA
MAP SELECT

J16

ISP2

J16

3.1.2

Running ISP

The C51/C251 Demo Board must be connected to a PC com port via the RS232 cable
connected to the RS232 connector of C51/C251 Demo Board.
After downloading, you can run code by switching PSEN on J11 to 1 and pressing the
RESET push button.

C51 Microcontrollers Demo Board User Guide

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Operation Mode

3.2

ISP External
Flash Memory
Mode

External Flash memory might be programmed using Windows hyper terminal or any terminal able to send HEX files in text mode.

3.2.1

Hardware
Configuration

The C51/C251 Demo Board must be connected to the PC com port with the cable connected to the RS232 connector J10.
The switch must be set as shown on Figure 3-2.
PLCC44 socket and X1 Quartz crystal will be used to program external Flash memory.
X1 must be 11.0592 Mhz and Atmel microcontroller must be plugged into PLCC44
socket.
Figure 3-2. C51/C251 Demo Board Switches Configuration to Program External Flash
Memory.
RS232 Cable to PC
J11

Position don’t care
User Code

Position needed

PSEN
ALE
ISP1

J11

1

J9

J9

1

0

0
EA
MAP SELECT

J16

ISP2

J16

3.2.2

3.2.3

Terminal
Configuration

ISP Operation

Use the following configuration for the terminal.
Parameter

Value

Bauds

9600

Data bits

8

Stop bits

1

Parity

None

Flow control

Xon-Xoff

1. Connect C51/C251 Demo Board to the PC com port with the cable.
2. Run Windows hyper terminal and configure it with the parameter specified in Figure 3-3.

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C51 Microcontrollers Demo Board User Guide

Operation Mode

Figure 3-3. Com Port Configuration

Figure 3-4. Terminal Window on Running ISP

Turn on the C51/C251 Demo Board and then follow the instructions on the terminal
screen and LCD display. After erasing Flash, the program asks for the memory zone,
and then asks to send the HEX file in text mode (see Figure 3-4, Figure 3-5 & Figure 36).

C51 Microcontrollers Demo Board User Guide

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Operation Mode

Figure 3-5. Send HEX File in Text Mode

Figure 3-6. Use *.* in the Selection Zone to See HEX files in the Directory

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C51 Microcontrollers Demo Board User Guide

Operation Mode

After the download of the HEX file, the program asks if you want to download another
HEX file in the second zone of the external Flash memory.
In this case you’ll have to switch MAP SELECT (to access second zone) and send
another HEX file in text mode.
All the external flash memory (128K bytes) is erased when ISP is used, even if you only
want to download one zone.
If you have one external Flash memory zone programmed, and later you want to add
another program to the second memory zone, you will have to download both programs
at the same time.
Note: The data transfer is seen on bar graph.

3.3

Demo Mode

In demo mode, programs stored into external flash memory are executed to demonstrate capability of Atmel Microcontrollers. To run external code we must have EA=0.
In this mode the first four bits of J11 (UC3:0) are used to select demo program and UC4
is used to select display (LCD or RS232).

Figure 3-7. Switch Utilities in Demo Mode
J11
User Code

Used to select demo program

Used to select display
PSEN
ALE
ISP1

J11

1

J9

J16

J9

1

0

0
EA

Used to select memory zone

MAP SELECT

ISP2

J16

3.3.1

C51 Mode

In C51 mode (Non Page Mode) switch J8 must be as shown in Figure 3-8.

C51 Microcontrollers Demo Board User Guide

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Operation Mode

Figure 3-8. C51 Mode (Non Page Mode)

J11

J8

NON PAGE MODE
J9

J16

3.3.2

C251 Mode

In C251 mode, the microcontroller can be used in Page Mode or Non Page Mode.
For Non Page Mode switch J8 must be in the same configuration as in C51 mode.
For Page Mode switch J8 must be as shown in Figure 3-9.

Figure 3-9. C251 Mode (Page Mode)

J11

PAGE MODE
J8

J9

J16

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C51 Microcontrollers Demo Board User Guide

Bill of Material

Section 4
Bill of Material
Reference

Type

C1-C28

POL_CAPACITOR

4,7uF

Qty
2

CMS_TAJ_Package_B

Comment

C2:C10-C19:C23

CAPACITOR

100nF

14

Package_0805

C11

POL_CAPACITOR

3,3uF

1

TAJ_CMS_Package_B

C12

POL_CAPACITOR

10uF

1

TAJ_CMS_Package_B

C13-C14-C24:C27

CAPACITOR

22pF

6

Serie_680

C15:C18

POL_CAPACITOR

10uF

4

CMS_TAJ_Package_B

D1-D14

1N4001

1N4001

2

Package_DO204AL

D2-D11:D13

LED

LED

4

CMS_STANDART

D3:D6

LED_GREEN

GREEN LED

1

in_line_2.54mm step

D7:D8

LED_YELLOW

YELLOW LED

1

in_line_2.54mm step

D9:D10

LED_RED

RED LED

1

in_line_2.54mm step

J1

CONNECTOR

CONNECTOR

J2

CONNECTOR_BATTERY_9V CONN_BATTERY_9V

1

J3

STRAP

STRAP

0

J4

DB9_MALE

DB9_MALE

1

SUBD9Pins_Right_Angle

J5-J10

DB9_FEMELLE

DB9_FEMELLE

2

SUBD9Pins_Right_Angle
CMS

1

J6:J7

Push_Button

Push_Button

2

J8

SWITCH_ON_ON

SWITCH_ON_ON

1

J9

Commut_DIP_2

Commut_DIP_2

1

J11

Commut_DIP_8

Commut_DIP_8

1

DIL

J12

CONNECTOR

CONNECTOR

1

DIN41612_3*32_MALE_Right_Angle

J13

Jumper_2,54mm

CONNECTOR

1

2*11 contacts

J14

LCD_2X16

LCD_2X16

1

NULL

J15

ALE_DIS

Strap

0

J16

Commut_DIP_1

Commut_DIP_1

1

J17

Switch ON-ON

Switch ON-ON

1

Inter. ON/OFF

J18

jumper Battery

Picot Pile

1

2 pins, step of 2,54mm

J19

Switch ON-ON

Switch ON-ON

R1-R24-R28-R29

RESISTOR

1kOhm

4

Package_0603

10kOhm

6

Package_0603

R2-R3-R20-R21-R25: RESISTOR
R4:R11

RESISTOR

10kOhm

2

Package_1206-CMS_ARC_241

R12-R19

RESISTOR

1kOhm

2

Package_1206_CMS_ARC_241

R21

POTENTIOMETER

10kOhm

1

SERIE_3362P

R23

RESISTOR

100 Ohm

1

0.6W-1%

R30

RESISTOR

180 Ohm

1

0,5W

U1

LM7805C

LM7805C

1

TO220 + Heater

U2

LM2936Z5

LM2936Z5

1

TO92

U3-U4-U7-U8

74ACT573

74ACT573

4

CMS

U5

TSC80C31

Socket

1

PLCC44

U6

AT49HF010-45JC

Socket

1

PLCC32

U9

ICL232CBE

ICL232CBE

1

CMS

U10

HEF4555P

HEF4555P

1

DIL

U12

TSC80C51

Socket

1

DIL24

U13

TSC80C51

Socket

1

PLCC68

U14

74ACT14

74ACT14

1

CMS

U15

74ACT00

74ACT00

1

CMS

X1

Quartz_11.05920

11,0592 MHz

1

HC49/4H

X2

Quartz_22,1184

22,1184 MHz

1

HC49/U

C51 Microcontrollers Demo Board User Guide

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Section 5
Schematics

C51 Demo Board User Guide

5-18
Rev. 4119C–8051–3/03

Schematics

5-19
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C51 Demo Board User Guide

Schematics

C51 Demo Board User Guide

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Schematics

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Schematics

C51 Demo Board User Guide

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Schematics

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C51 Demo Board User Guide

Atmel Headquarters

Atmel Operations

Corporate Headquarters

Memory

2325 Orchard Parkway
San Jose, CA 95131
TEL 1(408) 441-0311
FAX 1(408) 487-2600

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FAX (41) 26-426-5500

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East Kowloon
Hong Kong
TEL (852) 2721-9778
FAX (852) 2722-1369

Japan
Atmel Japan K.K.
9F, Tonetsu Shinkawa Bldg.
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
Japan
TEL (81) 3-3523-3551
FAX (81) 3-3523-7581

Atmel Corporate
2325 Orchard Parkway
San Jose, CA 95131
TEL 1(408) 436-4270
FAX 1(408) 436-4314

Microcontrollers
Atmel Corporate
2325 Orchard Parkway
San Jose, CA 95131
TEL 1(408) 436-4270
FAX 1(408) 436-4314
Atmel Nantes
La Chantrerie
BP 70602
44306 Nantes Cedex 3, France
TEL (33) 2-40-18-18-18
FAX (33) 2-40-18-19-60

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FAX (33) 4-42-53-60-01

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FAX (49) 71-31-67-2340
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Colorado Springs, CO 80906
TEL 1(719) 576-3300
FAX 1(719) 540-1759
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Maxwell Building
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TEL (44) 1355-803-000
FAX (44) 1355-242-743

e-mail
literature@atmel.com

Web Site
http://www.atmel.com
© Atmel Corporation 2003.
Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty
which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors
which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does
not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted
by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical
components in life support devices or systems.

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Other terms and product names may be the trademarks of others.
Printed on recycled paper.
4119C–8051–3/03

/xM



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Title                           : C51 Microcontrollers Demo Board
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