Atmel C51 User manual

C51 Microcontrollers Demo Board
..............................................................................................
User Guide

C51 Microcontrollers Demo Board User Guide i
4119C–8051–3/03
Table of Contents
Section 1
Introduction...........................................................................................1-2
1.1 C51/C251 Support ....................................................................................1-2
1.2 Demo Board Features...............................................................................1-3
Section 2
Hardware Description ...........................................................................2-4
2.1 Block Diagram...........................................................................................2-4
2.2 Specifications............................................................................................2-4
2.3 Supported Microcontrollers.......................................................................2-4
2.4 Board Supply Considerations....................................................................2-5
2.5 Board Layout.............................................................................................2-6
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

Introduction
C51 Microcontrollers Demo Board User Guide 1-2
4119C–8051–3/03
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
nOne PCB C51/C251 Demo Board (with battery connector)
nOne 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.
nFLIP: In-System Programming (ISP) software for Flash microcontrollers
nISP Demo Board Source and Code to program external Flash memory
nSource and Code of demo software

Introduction
1-3 C51 Microcontrollers Demo Board User Guide
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1.3 Support Questions can be sent to: [e-mail]
1.4 Demo Board
Features
nAn LCD Display (2 lines of 16 characters)
nAn Eight LED Bar Graph
n128 KB Flash Memory
nThree Different Sockets: PLCC44, PLCC68 & DIL24
nIn-System Programming (ISP) Software to Download HEX Files in Flash Memory
nHardware Capability to Program the Microcontrollers On-Chip Flash Memory
nExtension Connectors for Special Features, Applications, New Products, or Demos

Hardware Description
C51 Microcontrollers Demo Board User Guide 2-4
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Section 2
Hardware Description
2.1 Block Diagram
Figure 2-1. Block Diagram
2.2 Specifications
2.3 Supported
Microcontrollers Most Atmel C51 and C251 microcontrollers are supported.
The Demo Board does not support low voltage parts, only 5V parts are supported.
Reset & INT1#
Power
interface
RS232
C51/C251 LCD 2*16
Bargraph
Config switches
128 K Flash memory Glue
Synchro connectors
To All Extensions
connector
Parameter Typ Max Unit
Supply DC voltage 9 12 V
Supply DC current 200 mA
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

Hardware Description
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2.4 Board Supply
Considerations
nPower connector J1 or battery connector J2 may be used to power the board.
nOn J2 connector a rechargeable battery or a non-rechargeable battery may be used.
nIn case of rechargeable battery usage on J2, if J18 is ON the battery is charged when
the board is powered by J1.
nBoard 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 J1with 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
Figure 2-3. C51/C251 Demo Board powered by J1 with a rechargeable battery on J2
J1 Power Supply Connector
9V to 12V DC IN
J18
9V
PP3
J2
OFF
non-rechargeable
battery
AC-DC
LCD display
LCD display
J1 Power Supply Connector
9V to 12V DC IN
J18
9V
PP3
J2
ON
battery is being charged
In this configuration
rechargeable
battery
AC-DC

Hardware Description
C51 Microcontrollers Demo Board User Guide 2-6
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Figure 2-4. C51/C251 Demo Board Powered by J2.
2.5 Board Layout nOn-Off
–Switches ON the power supply.
nReset
–Resets the microcontrollers.
nINT1#
–Issues an interruption on microcontollers on INT1# pin.
nJ8 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.
nSynchro IN
–Used to connect several C51/C251 Demo Boards together, provides global
reset / interrupt for all connected C51/C251 Demo Boards.
nSynchro 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.
nRS232
–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.
J18
ON
J1 Power Supply Connector
9V
PP3
J2
battery
NOT USED
(rechargeable or not)
LCD display

Hardware Description
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Figure 2-5. C51/C251 Demo Board
2.6 J11 Switches Table 1. J11 Switches
(Set=1, Clear=0)
J11
J9
J16
RS232 Cable to Terminal
J8
J8
LCD CTRST
+
RESET
INT1
OFF
ON
J17
R21
Page Mode
Non Page Mode
Synchro IN Synchro OUT
RS232
LCD
11
1
X2
X3
X1
PLCC44
PLCC68
DIL24
Extension connector
76543210
ISP ALE PSEN UC4 UC3 UC2 UC1 UC0
Bit
Number Bit Mnemonic Description
7ISP1
In-System Programming (external Flash memory)
Set to enable external Flash memory programming
Clear to protect external Flash memory from erasure and programming
6ALE
Address Latch Enable
Set to see ALE activity
Clear to ground ALE
5PSEN
Program Store Enable
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.

Hardware Description
C51 Microcontrollers Demo Board User Guide 2-8
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Table 2. J9 Switches
Table 3. J16 Switches
Figure 2-6. Switch Configuration
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.
10
MAP SELECT EA
Bit
Number Bit Mnemonic Description
1MAP
SELECT
Map Select
Set to select external Flash memory zone from $10000 to $1FFFF
Clear to select external Flash memory zone from $00000 to $0FFFF
0EA
External Address
Set to fetch internal code (on chip code).
Clear to fetch code from external Flash memory
0
ISP2
Bit
Number Bit Mnemonic Description
0ISP2
In System Programming 2 (external Flash memory)
RESERVED
MUST BE OFF (set to 1)
J11
PSEN
ALE
ISP1
User Code
10
10
J11
J9
J16
J9
J16
EA
MAP SELECT
ISP2
RS232 Cable to PC
0
7
Set = 1
Clear = 0
OFF

Operation Mode
C51 Microcontrollers Demo Board User Guide 3-10
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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
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.
J11
PSEN
ALE
ISP1
User Code
10
10
J11
J9
J16
J9
J16
EA
MAP SELECT
ISP2
RS232 Cable to PC Position don’t care
Position needed

Operation Mode
3-11 C51 Microcontrollers Demo Board User Guide
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3.2 ISP External
Flash Memory
Mode
External Flash memory might be programmed using Windows hyper terminal or any ter-
minal 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 con- nected 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.
3.2.2 Terminal
Configuration Use the following configuration for the terminal.
3.2.3 ISP Operation 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 Fig-
ure 3-3.
J11
PSEN
ALE
ISP1
User Code
10
10
J11
J9
J16
J9
J16
EA
MAP SELECT
ISP2
RS232 Cable to PC
Position don’t care
Position needed
Parameter Value
Bauds 9600
Data bits 8
Stop bits 1
Parity None
Flow control Xon-Xoff

Operation Mode
C51 Microcontrollers Demo Board User Guide 3-12
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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 3-
6).

Operation Mode
3-13 C51 Microcontrollers Demo Board User Guide
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Figure 3-5. Send HEX File in Text Mode
Figure 3-6. Use *.* in the Selection Zone to See HEX files in the Directory

Operation Mode
C51 Microcontrollers Demo Board User Guide 3-14
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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 demon-
strate 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
3.3.1 C51 Mode In C51 mode (Non Page Mode) switch J8 must be as shown in Figure 3-8.
J11
PSEN
ALE
ISP1
User Code
10
10
J11
J9
J16
J9
J16
EA
MAP SELECT
ISP2
Used to select demo program
Used to select display
Used to select memory zone

Operation Mode
3-15 C51 Microcontrollers Demo Board User Guide
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Figure 3-8. C51 Mode (Non Page Mode)
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
J9
J16
J8 NON PAGE MODE
J11
J9
J16
J8
PAGE MODE

Bill of Material
C51 Microcontrollers Demo Board User Guide 4-16
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Section 4
Bill of Material
Reference Type Qty Comment
C1-C28 POL_CAPACITOR 4,7uF 2 CMS_TAJ_Package_B
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 1
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
J6:J7 Push_Button Push_Button 2 CMS
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
R2-R3-R20-R21-R25:RESISTOR 10kOhm 6 Package_0603
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