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DATA BRIEF

May 2004

For further information contact your local ST sales office.

ST19WP18

Trusted Platform Module (TPM)

PRODUCT FEATURES

SINGLE-CHIP TRUSTED PLATFORM
MODULE (TPM)

EMBEDDED TPM 1.2 FIRMWARE

FULL TPM SOLUTION WITH COMPLETE
TCG COMPLIANT SOFTWARE STACK
LAYERS

33-MHz LOW PIN COUNT (LPC)
INTERFACE V1.1

COMPLIANT WITH TCG PC CLIENT
SPECIFIC TPM IMPLEMENTATION
SPECIFICATION (TIS) V1.2

DEDICATED LPC COMMUNICATION
BUFFER FOR TPM COMMANDS HANDLING
OPTIMIZATION

TRUSTED COMPUTING GROUP (TCG)

(1)

V1.1B / V1.2 CONFIGURABLE MODE OF
OPERATIONS

ARCHITECTURE BASED ON ST19W
SECURE SMARTCARD IC PLATFORM:

1088-bit Modular Arithmetic Processor
providing Full support for Asymmetric
operations

Hardware-based SHA-1 accelerator
enabling BIOS related fast hash
operations

FIPS 140-2 compliant Random Number
Generator

Active security sensors

EEPROM-BASED NVM INCLUDING 128
BYTES OF OTP AREA FOR PRODUCTION
CONFIGURATION

Highly reliable CMOS EEPROM
submicron technology

10 year data retention

500,000 Erase/Write cycle endurance

Storage for up to 30 keys

5 SOFTWARE-CONTROLLED GENERAL
PURPOSE I/O (GPIO) PINS

POWER SAVING MODE

AVAILABLE IN RECOMMENDED TCG PC
CLIENT 1.2 COMPATIBLE TSSOP28

3.3V ą 10% POWER SUPPLY VOLTAGE

0-70

C OPERATING TEMPERATURE

RANGE

Figure 1. Delivery Form

1. TCG website: http://www.trustedcomputinggroup.org

Function

Speed

(1)

Typical values, independent of external clock frequency and
supply voltage.

RSA 1024 bits signature with CRT

(1)

62 ms

RSA 1024 bits signature without CRT

(2)

CRT: Chinese Remainder Theorem.

206 ms

RSA 1024 bits verification (e='$10001')

4 ms

RSA 1024 bits key generation

1.8 s

RSA 2048 bits signature with CRT

(2)

416 ms

RSA 2048 bits verification (e='$10001')

66 ms

TSSOP28

ST19WP18

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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

SERIRQ

VBAT

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ST19WP18

SOFTWARE DESCRIPTION

Embedded firmware
The ST19WP18 includes fully compliant TCG
v1.1b firmware which supports features like cryp-
tographic key generation, integrity metrics and se-
cure storage. In addition, the product is TCG v1.2
ready and provides support for functions such as
Delegation, Transport session and Locality.
This TCG v1.1b / v1.2 compliant firmware uses an
optimized and flexible software architecture allow-
ing the integration of Trusted Computing Frame-
work enhancements or implementation of dedicat-
ed functions.
TCG Software Stack
The ST19WP18 provides complete system soft-
ware layers, fully compliant with TCG Trusted
Software Stack specification.
Microsoft Windows

2000/XP operating systems

are supported. Please contact ST for a complete
list of supported operating systems. The embed-
ded firmware plus additional modules bring OEMs
a complete TPM solution for their PC platforms.

The software stack comprises the following mod-
ules:

BIOS Memory Absent driver (MA)

BIOS Memory Present driver (MP)

TPM Device Driver (TDD)

TPM Device Driver Library (TDDL)

TSS Core Services (TCS)

TSS Service Provider (TSP)

Cryptographic infrastructure interface

Secure and trustworthy functions of the
ST19WP18 module are made available to applica-
tions through cryptographic Application Program-
ming Interfaces (APIs) compliant either to
PKCS#11standard or to the MS CAPI specifica-
tion. An ST19WP18 ready Cryptographic Service
Provider (CSP) can then be used to enhance Op-
erating System security policies or applications se-
curity plug-ins which take full advantage of the
secure TPM functionalities such as sealed stor-
age, key generation, signature and encryption.

Figure 3. Software Layers

Application 1

Application 3

Application 2

MS CAPI

CSP

PKCS#

CSP

Cryptographic
Infrastructure Interface

TSP Interface

OS User

Mode

TSS Service Provider

TSS Core Services

TPM Device Driver Library

TCS Interface

TDDL Interface

TPM Device Driver

ST19WP18 - TPM

OS Kernel
Mode

Hardware

ai09876

TPM BIOS

MA Driver

TPM BIOS

MP Driver

System Processes

User Processes

ST19WP18

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PIN AND SIGNAL OVERVIEW

Figure 4. Pinout description

Table 1. Signal description

Signal

Type

Description

LAD[3:0]

Bidir

Multiplexed Command, Address and Data (see LPC Interface Spec)

LPCPD#

Input

Power Down indicates that the peripheral should prepare for power to be removed
from the LPC i/F devices. Actual power removal is system dependent (see LPC Inter-
face Spec)

LCLK

Input

Clock Same 33Mhz clock as PCI clock on the host. Same clock phase with typical PCI
skew. (see LPC Interface Spec)

LFRAME#

Input

Frame indicates start of a new cycle, termination of broken cycle (see LPC Interface
Spec)

LRESET#

Input

Reset same as PCI Reset on the host (see LPC Interface Spec)

SERIRQ

Bidir

Serialized IRQ is used by TPM to handle interrupt support (see LPC Interface Spec)

GPIO5/CLKRUN#

Bidir

General Purpose IO, weak internal pull-up fully configurable by Software
CLKRUN# same as PCI CLKRUN#. Only needed by peripherals that need DMA or bus
mastering in a system that can stop the PCI bus (generally in mobile systems)

Input

Physical Presence, active high, internal pull-down. Used to indicate Physical Pres-
ence to the TPM

GPIO[4:1]

Bidir

General Purpose IOs with weak internal pull-up fully configurable by Software

Bidir

Bidirectional IO ISO 7816-2 compliant serial port

VPS

Input

3.3v Power supply. VPS has to be connected to 3.3v DC power rail supplied by the
motherboard

GND

Input

Zero volts ground reference. GND has to be connected to the main motherboard
ground

GPIO1

GPIO2

GND

GPIO3

GPIO4

VPS

GND

LPCPD#

SERIRQ

LAD0

VPS

LAD1

LFRAME#

LCLK

LAD2

GPIO5/CLKRUN#

LRESET#

GND

LAD3

TSSOP28

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ST19WP18

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted

by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject

to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not

authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

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All other names are the property of their respective owners.

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Part Number ST19WP18