Atmel AT89EVK-01 Manual de usuario

AT89EVK-01 User Guide 1-3

4325C–SCR–09/04

Section 1

Introduction

This document describes the AT89EVK-01 evaluation kit dedicated to the AT83C24

Smart Card Reader Interface IC. This board is designed to allow an easy evaluation of

the AT83C24 on an application using the TDA8004.

This board can be connected on the TDA8004 footprint.

1.1 Features The AT89EVK-01 provides the following features:



Possibility to replace the TDA8004 (or TDA8024) with the AT89EVK-01 board . The

AT89EVK-01 board is soldered on the TDA8004 footprint.



The AT83C24 registers are programmed with the TWI link (SDA,SCL). The

T89C5121 microcontroller sends the TWI commands to configure the AT83C24

registers.



The configuration software is stored in T89C5121 Flash memory. The program can be

reloaded by using FLIP / BatchISP (In-System Programming tool) and an RS-232

adaptor board (CEIBO for example).



Hardware configuration allowed with switches and solder pads.



The program can be modified and reloaded with Batchisp (see 2.2.2)

Introduction

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AT89EVK-01 User Guide 2-5

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Section 2

Hardware Description

2.1 TDA8004 Mode

2.1.1 Overview The AT89EVK-01 board is soldered on the customer application by using the SO plug. If

there is a problem to connect the AT89EVK-01 board on the SO plug, connectors can

be added to lift the board.

Figure 2-1. General Description

Input signals of the TDA8004 footprint are connected to AT83C24.

Output signals of the TDA8004 footprint are provided by AT83C24.

The program stored in the Flash memory configures the AT83C24 registers once after

the reset. The functionalities of the TDA8004 are provided by the AT83C24.

Remarks:



The AT89EVK-01 board power supply comes from the TDA8004 footprint.



The program stored in the Flash memory configures the AT83C24 registers once after

the reset.

2.1.2 Clock signal (CLK)

The AT89EVK-01 board needs a clock signal. The AT89EVK-01 board needs a clock

signal for T89C5121 (XTAL1 pin) and for AT83C24 (CLK pin).

Customer board

TDA8004 footprint

SO plug

AT89EVK01board AT83C24

extra connectors

Hardware Description

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Two solutions are proposed for the clock generation: waveform generator or crystal.

Figure 2-2. External Waveform Generator for Clock

Figure 2-3. Crystal for Clock

A solder pad (SW4) is used to configure the source: crystal or external waveform

generator.

2.1.3 Smart Card Clock

Signal (CCLK) The AT83C24 outputs the smart card clock signal (CCLK). Two modes are available to

generate this signal:

1. The source is CLK. The CKS prescaler is used to divide CLK signal or DCCLK

signal.

2. The source is A2. The CKS prescaler is used to divide A2 signal.

2.1.4 Power Supply The power supply comes from the TDA8004 footprint. The signal VDDP of the TDA8004

is used (5V).

The EVCC pin of the AT83C24 is connected to the VDD (3.3V). EVCC is used to supply

the AT83C24 pads connected to the customer application.

2.1.5 PRES, PRES\ The TWI_SEL switch is connected on an I/O of the T89C5121. The TDA8004

(TDA8024) PRES pin and PRES\ pin are connected on T89C5121 I/Os. The position of

Table 2-1. Clock Solder Pads Configuration

SW4 Configuration

without solder Waveform generator

with solder crystal

SO plug

AT83C24

AT89C5121 RESET

AT83C24 2.0.0

ATMEL

SCL

SDA

VCC

VSS

XTAL1

waveform

generator

SO plug

AT83C24

AT89C5121 RESET

AT83C24 2.0.0

ATMEL

SCL

SDA

VCC

VSS

XTAL1

14.74MHz

Hardware Description

AT89EVK-01 User Guide 2-7

4325C–SCR–09/04

the TWI_SEL switch selects the polarity of the smart card presence: information on

PRES or on PRES\ (see §2.1.8). See Figure 4-1 on page 16 for TWI_SEL selection.

Figure 2-4. Power Supply Configuration

Remark:



VCC and L1 must be connected to the same voltage.

2.1.6 TWI Link The TWI link is managed by T89C5121. The program stored in the Flash memory con-

figures the AT83C24 registers once after the reset.

The T89C5121 sends TWI commands. The AT83C24 TWI address depends on level on

A2,A1,A0 pins at reset. The T89C5121 sends TWI commands at all addresses to avoid

any problem of level on A2, A1, A0 at reset.

2.1.7 External TWI Link If the user wants to use an external TWI source to configure the AT83C24, the 2 test

points SCL and SDA are used.

To avoid any conflict with T89C5121 signals, the T89C5121 software must check the

SW2 signal before to send data on SCL and SDA.

2.1.8 Board configuration The table below describes the switches and solder pads configurations.

AT83C24

VCC

VDDP TDA8004 (5V)

EVCC

VDD TDA8004 (3.3V or 5V)

Table 2-2. Configuration Description

Solder pad

or Switch Default

Configuration Description

SW1 no solder RFU (TDA8004AT)

SW2 TWI_SEL = 0 Smart card presence detection:

TWI_SEL = 0: PRES indicates the smart card presence.

TWI_SEL = 1: PRES\ indicates the smart card presence.

SW5 Reset button

SW4 with solder Used for clock configuration (see §2.1.2)

SW9 solder Used to connect TDA8004 clock on A2 (transparent

mode). Use firmware from version 3 (at89evk01_V3.zip)

SW11 no solder Used to connect a pull up resistor on RESET pin

Hardware Description

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2.2 T89C5121

Firmware

Reconfiguration

The program stored in the T89C5121 (Flash version) sends TWI commands to config-

ure the AT83C24 registers at each reset or power on.

If the user wants to modify the AT83C24 configuration, it need to reprogram the

T89C5121 Flash memory by using FLIP/BatchISP software (free download on

www.atmel.com) as described below.

Figure 2-5. T89C5121 In System Programming Description

2.2.1 CEIBO MP-51RD2

Programmer The CEIBO “MP-51RD2 Programmer” board is used to interface the RS-232 and the Rx

Tx pins of the T89C5121. This board makes the electrical interface between microcon-

troller signals (5V) and RS-232 signals (12V).

FLIP/BatchISP software

(ATMEL In System Programming software)

RS-232 CEIBO

MP-51RD2 board

EVK01 board

Rx, Tx signals (5V)

Power Supply

Waveform

Generator

XTAL1

VCC

VSS

(14.74 MHz)

Hardware Description

AT89EVK-01 User Guide 2-9

4325C–SCR–09/04

Figure 2-6. CEIBO “MP-51RD2 Programmer” Board and J1 connector

Figure 2-7. CEIBO “MP-51RD2 Programmer” Board and AT89EVK-01 connections

2.2.2 AT83C24 registers

programming The Flash memory of the T89C5121 is loaded with FLIP/BatchISP if a new configuration

is needed for the AT83C24.

1. Unzip the AT89EVK01_Vx.zip (x : version)

This zip file contains 3 files :

– AT83C24_batchisp.hex : T89C5121 firmware file

– at89evk01.bat : DOS command file

– AT83C24_batchisp_prog.txt : script file for batchisp software

2. Copy all files at C:\Program Files\ATMEL\FLIP x.x.x\bin

3. Connect the external waveform generator - Frequency at 14.74MHz or solder

SW4

4. Connect the RS232C cable to PC serial port

5. Connect power supply to the AT89EVK-01 board

6. Switch on the power supply

7. Execute at89evk01.bat

RS-232 AT89EVK01boar

Rx(6)

Tx (4)

Vss(9)

Vcc (1)

Vcc

Vss

5V Power Supply

Hardware Description

2-10 AT89EVK-01 User Guide

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Figure 2-8. Execution of at89evk01.bat (V1.0)

Hardware Description

AT89EVK-01 User Guide 2-11

4325C–SCR–09/04

Figure 2-9. FLIP/BatchISP command script file AT83C24_batchisp_prog.txt (V1.0)

Following the application need, the AT83C24 registers can be changed. Only the value

of fillbuffer FLIP/BatchISP commands has to be modified. By default values of AT83C24

registers are:

Table 2-3. AT83C24 register address and default value

Name Address

Default

Values

V1.0

Default

Values

V2.0

Default

Values

V3.0(1) Comments

Config0 0x26D 0x80 0x80 0x80

Config1 0x26E 0x0A 0x0A 0x0A

Config2 0x26F 0x00 0x24 0x24 Note: For Smart Card Clock frequency of

AT83C24 at 4.5MHz, XTAL1 must

be set at 4.5MHz - V1.0

Config3 0x270 0x80 0x80 0x80

Config4 0x271 0x0B 0x0B 0x0B

Interface 0x272 0x00 0x00 0x00

Note: 1. Default values are included in hex file

Hardware Description

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