ST33TPHF20SPI datasheet(12/47 Pages) STMICROELECTRONICS

12 / 47 page

FIPS140-2 SECURITY POLICY

Page 12 of 47

NON-PROPRIETARY DOCUMENT

1.4.2

FW block diagrams

Block diagrams of the TPM FW are provided at Figure 16: TPM FW block diagram (TPM2E)

and Figure 17: TPM FW block diagram.

1.4.2.1

AAF0 / AAF1 / AHB3 / AHB4 / AHB7 / AHB8

Figure 16: TPM FW block diagram (TPM2E)

TPM FW is composed of:



Non-upgradable code blocks located in ROM & flash memories (depicted in orange)



Boot code



Cryptographic library



HW and memory low-level services



Upgradable code blocks via secure field upgrade mechanism (blue and green boxes)



Application flash loader (AFL) in charge of TPM field upgrade



TPM1.2 core (irreversibly deactivated as indicated in

§1.7.1)



TPM1.2 commands code (irreversibly deactivated as indicated in

§1.7.1)



TPM2.0 core



TPM2.0 commands code



Low-

level services API (incl. cryptographic services, memory management, …)

TPM1.2

core

TPM1.2

commands

AFL

Boot

Low-level services API

Cryptographic

library

HW and memory

services

TPM2.0

core

TPM2.0

commands

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