ST19WR02

2/4

Hardware description

The product, member of the ST19W platform, is a serial access microcontroller specially designed for

cost-effective secure portable applications.

It is manufactured using an advanced highly reliable ST CMOS EEPROM technology.

It is based on the STMicroelectronics 8-bit CPU already implemented on the ST19X product family and

includes on-chip memories: User ROM, User RAM and EEPROM with state-of-the-art security features.

ROM, RAM and EEPROM memories can be configured into partitions with customized access rules.

An additional ST ROM contains all ST provided functions and libraries.

Access from any memory area to another are protected by hardware firewalls. Access rules are user-

defined and can be selected by mask options.

The chip includes a DES accelerator which is accessible via cryptographic software libraries located in ST

ROM.

As with all the other ST19W products, a serial interface fully compatible with the ISO 7816 standard for

Smartcard applications is available.

A CRC calculation block is also available and is directly accessible by the User.

Block Diagram

INTERNAL BUS

MEMORY ACCESS FIREWALL

I/O

1 X

SERIAL

INTER-

FACE

GND

8 BIT

CPU

2 X

8 BIT

TIMERS

CRC

MODULE

CLK

CLOCK

GENE-

RATOR

MODULE

Vcc

GUN A

&

GUN B

ST ROM, and

DES FIREWALL

RAM

USER ROM

ST ROM, RF

and DES

LIBRARIES

DES

ACCELE

-RATOR

516

SECU-

RITY

ADMIN.

RESET

RF

INTER-

FACE

EEPROM

AC0 AC1