ST19WP18

2/5

GENERAL DESCRIPTION

The ST19WP18 is a cost effective Trusted Plat-

form Module (TPM) solution. The ST19WP18 is

designed to provide PC platforms with enhanced

security and integrity mechanisms as defined by

Trusted Computing Group standards. The product

provides full support of TCG v1.1b as well as TCG

v1.2 specifications

The ST19WP18 is driven from the Smartcard IC

ST19W platform. It is manufactured using the ad-

vanced highly reliable STMicroelectronics CMOS

EEPROM technology.

The ST19WP18 has an 8-bit CPU architecture

and includes the following on-chip memories:

User ROM, User RAM and EEPROM with state of

the art security features. ROM, RAM and EEP-

ROM memories can be configured into partitions

with customized access rules.

The ST19WP18 also includes a Modular Arithme-

tic Processor (MAP). The 1088 bits architecture of

this cryptographic engine allows processing of

modular multiplication, squaring and additional

calculations up to 2176 bit operands.

The Modular Arithmetic Processor is designed to

speed up cryptographic calculations using Public

Key Algorithms.

The Secure Hash Accelerator allows fast SHA-1

computation especially well suited for BIOS hash

operations during early boot stages.

The ST19WP18 has been specially designed in

line with TCG PC Client Specific TPM Implemen-

tation Specification (TIS) referring to Intel’s LPC

Specification revision 1.0.

Figure 2. Block Diagram

INTERNAL BUS

MEMORY ACCESS FIREWALL

I/O0

1 x

Serial

interface

Gnd 2

8 bit

CPU

3 x

8 bit

Timers

CRC

module

CLK

Clock

Generator

module

ST ROM, MAP and DES FIREWALL

RAM

User ROM

ST ROM, RF

and Crypto

Libraries

EDES

Accelerator

MAP

1088 bits

514

Vcc 2

Gun A

&

Gun B

Security

Admin.

RESET

EEPROM

SHA

Module

5 x

General

purpose

I/Os

interface

Gpi/0

RAM 2K

LPC

interface

LFrame LPCPD

Lad3

Lad2

Lad1

Lad0

PP

SERIRQ

VBAT