2.

Block Diagram

Figure 2-1. Block Diagram

ROM

Program

Flash

Program

ARM

®

32-bit RISC

CPU

SRAM*

Flash*

Data

CRYPTO

Engine

GPIO

SPI

Interface

Physical

Security

Circuitry

MOSI

MISO

SPI_CLK

SPI_CS#

PIRQ#

SPI_RST

#

GPIO

Express-00

PP/GPIO

Note: GPIO Pins are

not available in

UDFN-8 Package

Note: * SRAM and Flash Data are

not accessible by user.

RNG

Timer

Random Number Generator

The ATTPM20P includes a hardware Random Number Generator (RNG), configured as a FIPS

Deterministic Random Bit Generator (DRBG) that is used for key generation and TCG protocol functions.

The RNG is also available to the system to generate random numbers that may be needed during normal

operation.

Physical Security

The ATTPM20P has voltage and temperature tampers, an active shield and other physical security

measures built into the device.

TCG Documentation

The ATTPM20P has been designed to be compliant with the Trusted Computing Group TPM 2.0

specification. Full documentation for TCG primitives can be found in the TCG Trusted Platform Module

Library, Parts 1 to 3, on the TCG website: https://www.trustedcomputinggroup.org. TPM features specific

ATTPM20P

Block Diagram

Datasheet Summary

DS40002082A-page 6