1

Note: This is a summary document. A complete document is

available under NDA. For more information, please contact your

local Atmel sales office.

Features

°C Temperature Range

Description

The AT97SC3201 is a fully integrated security module designed to be integrated into

personal computers and other embedded systems. It implements version 1.1b of the

Trusted Computing Platform Alliance (TCPA) specification for Trusted Platform

Modules (TPM). This specification has been adopted by the Trusted Computing Group

(TCG).

The TPM includes a crypto accelerator capable of computing a 2048-bit RSA

signature in 500 ms and a 1024-bit RSA signature in 100 ms, both using CRT.

Communication to and from the TPM can occur through one of two interface

protocols: either a 33-MHz LPC interface or a 100-KHz SMBus two-wire interface.

Figure 1. AT97SC3201 Block Diagram

The chip includes a full hardware random number generator that is used for the TCG

protocol and is also available to the system for any random numbers it may need

during normal operation.

33 MHz

LPC

Interface

AVR

8/16 Bit

CPU

Physical

Security

Circuitry

SMBCLK/IOA

SMBus Interface

or GPIO

RTC

32.768 kHz

RNG

Timer

ROM

Program

EEPROM

Program

EEPROM

Data

CRYPTO

Engine

SRAM

IOC

SMBDAT/IOB

Trusted

Platform

Module

AT97SC3201

Summary

Rev. 2015DS-TPM–7/04