Atmel C51 Manuel utilisateur

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

4119C–8051–3/03

1.3 Support Questions can be sent to: mcu@atmel.com

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

4119C–8051–3/03

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

2-5 C51 Microcontrollers Demo Board User Guide

4119C–8051–3/03

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

PP3

OFF

non-rechargeable

battery

AC-DC

LCD display

J1 Power Supply Connector

9V to 12V DC IN

J18

PP3

battery is being charged

In this configuration

rechargeable

battery

AC-DC

Hardware Description

C51 Microcontrollers Demo Board User Guide 2-6

4119C–8051–3/03

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

J1 Power Supply Connector

PP3

battery

NOT USED

(rechargeable or not)

LCD display

Hardware Description

2-7 C51 Microcontrollers Demo Board User Guide

4119C–8051–3/03

Figure 2-5. C51/C251 Demo Board

2.6 J11 Switches Table 1. J11 Switches

(Set=1, Clear=0)

J11

J16

RS232 Cable to Terminal

LCD CTRST

RESET

INT1

OFF

J17

R21

Page Mode

Non Page Mode

Synchro IN Synchro OUT

RS232

LCD

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.

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