Intel G1620T CM8063701448300 User Manual

Datasheet

697

This section describes the security components and capabilities. The security system 
contains an Intel

®

 TXE and additional hardware security feature that enable a secure 

and robust platform.

TXE firmware is required on the Platform as part of the PCU SPI flash image.

The Intel

®

 TXE

in the processor is responsible for supporting and handling security 

related features.

Intel TXE features:

•

32-bit RISC processor

•

256KB Data/Code RAM accessible only to the Intel

®

 TXE

•

128KB On Chip Mask ROM for storage of Intel

®

 TXE code

•

Common Timer 1-100 µS granularity, configurable interrupt (under FW control)

•

Inter-Processor Communication for message passing between the Host CPU and 
Intel

®

 TXE

•

64 byte input and output command buffers

•

256 byte shared payload (enables 2048-bit keys to be exchanged as part of the 
command)

•

No Host CPU address domain access to the Intel

®

 TXE address domain by any Host 

CPU address domain units

•

Security controller has direct access to Host CPU address domain (Some 
Restrictions Apply). Multiple context DMA engine to transfer data between Host 
CPU address domain (System memory) and the Intel

®

 TXE; programmable by the 

Intel

®

 TXE CPU only.

•

One multi-tiered FW Key Ladder and one Intel Key ladder.

•

Paging DMA operations includes encryption/decryption and integrity check value 
(ICV) calculation.  Auxiliary GPIOs to support input alert and two GP Outputs.

•

DES/3DES (ECB, CBC) – 128b ABA key for 3DES Key Ladder Operations

•

Three AES engines - Two fast -128 and one slow- 128/256