AN1978 Datasheet, PDF(1/14 Page) STMicroelectronics

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AN1978 Datasheet, PDF (1/14 Pages) STMicroelectronics – SMART CARD INTERFACE

AN1978

APPLICATION NOTE

ST8004: SMART CARD INTERFACE

1. INTRODUCTION

The ST8004 is a smart card interface designed to minimize the microprocessor hardware and software

complexity in all the applications that need a smart card, such as Set-Top-Boxes, electronic payments,

pay TV and identification.

The ST8004 is compliant with the NDS requirements. It implements all the blocks and procedures for the

card activation/deactivation as shown in the block diagram of figure 1.

Figure 1: ST8004 internal block diagram

VDD

100nF

VDDP

100nF

VTHSEL 18

OFF 23

RSTIN 20

CMDVCC 19

5/3V 3

S1 S2

SUPPLY

INTERNAL

REFERENCE

VOLTAGE

SUPERVISOR

ST8004 6

STEP-UP CONVERTER

Vref

INTERNAL OSCILLATOR

2.5MHz

ALARM

En1 CLKUP

En2

VCC

GENERATOR

PVCC

En5 RST BUFFER

SEQUENCER

CLKDIV1 1

CLKDIV2 2

En4

CLOCK

CIRCUITRY

CLK

En4

CLOCK

BUFFER

XTAL1 24

XTAL2 25 OSCILLATOR

THERMAL

PROTECTIO

En3

4 PGND

8 VUP

17 VCC

14 CGND

16 RST

15 CLK

10 PRES

9 PRES

AUX1UC 27

I/O TRANSCEIVER

13 AUX1

100nF

AUX2UC 28

I/O TRANSCEIVER

12 AUX2

I/OUC 26

GND

I/O TRANSCEIVER

11 I/O

June 2004

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