ST19WK08

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.

The chip includes also a MAP which is based on a

1088 bits processor architecture. It processes

modular multiplication, squaring and additional

calculations up to 2176 bit operands.

Internal Modular Arithmetic Processor (MAP) and

enhanced DES accelerator are designed to speed

up cryptographic calculations using Public Key Al-

gorithms and Secret Key Algorithms.

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:

–

ST19-HDSX Emulator,

–

ST19X simulation package,

–

NT, 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, MAP, and

EDES FIREWALL

RAM

USER ROM

ST ROM, MAP

and EDES

LIBRARY

EDES

ACCELE

-RATOR

455

Vcc

GUN A

&

GUN B

SECU-

RITY

ADMIN.

RESET

EEPROM

MAP

1088 bits