ST19WS04

2/3

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 reli-

able ST CMOS EEPROM technology.

It is based on the STMicroelectronics 8 bit CPU al-

ready 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 ac-

cess rules.

An additional ST ROM contains all ST provided

functions and libraries.

Access from any memory area to another are pro-

tected by hardware FIREWALLS. Access rules are

User defined and can be selected by mask op-

tions.

The chip includes an Enhanced DES accelerator

which is accessible via cryptographic software li-

braries located in ST ROM.

As with all the other ST19W products, a serial in-

terface fully compatible with the ISO7816 standard

for Smartcard applications is available.

A CRC calculation block is also available and is di-

rectly accessible by the User.

Figure 2. Block Diagram

SOFTWARE DEVELOPMENT

Software development and firmware generation

(ROM and options) are supported by a compre-

hensive set of development tools, dedicated at de-

velopment and validation of softwares:

–

Smartcard ICs Emulator,

–

ST19X simulation package,

–

2000, XP based stations,

–

Powerful C/C++ compiler and debugger are

also available (third party tools).

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

ST ROM, and

EDES FIREWALL

RAM

USER ROM

EDES

ACCELE

-RATOR

469

Vcc

GUN A

&

GUN B

SECU-

RITY

ADMIN.

RESET

EEPROM

ST ROM, and

EDES LIBRARY