ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 507

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Security Block
6.11
The Security block provides a hardware Advanced Encryp-
tion Standard (AES) encryption/decryption engine and
interface for accessing EEPROM memory for storing
unique IDs and/or security keys. The AES and EEPROM
sections have separate control registers but share a single
set of interrupt registers.
6.11.1
• AES
• EEPROM I/F
AMD Geode™ LX Processors Data Book
rqout
daout
dain
rqin
— Electronic Code Book (ECB) or Cipher Block
— CBC 128-bit hardware encryption and decryption
— DMA read and write (two contexts)
— Hidden key, (stored on EEPROM)
— Writable key can be written by the x86 processor
— Can use interrupts, SMIs, or be polled for completion
— Memory mapped register interface
— Provides 2K bit of EEPROM storage
— Programmable lock bits
Chaining (CBC) 128-bit hardware encryption and
decryption
status
Security Block
Security Block Features
Control
Clock
GLIU
Unit
slave
master
Figure 6-54. Security Block Diagram
Security Block
AES Engine
True Random Number Generator
Control
Clock
SB Specific
Control
Unit
Clock
Registers
• True Random Number Generator (TRNG)
Note: For security purposes, the EEPROM interface
6.11.1.1 Performance Metrics
• System goals:
Unit
DMA
EEPROM ID Interface
— Programmable “Hidden” AES key
— Can use interrupts, SMIs, or be polled for completion
— Memory mapped register interface
— Read via MSR
— 400 MHz GLIU interface
— > 40 MB/Sec. encrypt or decrypt
status
resets to the “debug disabled” state. It takes
approximately 490 us to read the EEPROM and
unlock the debug interface. Therefore, the “CPU
stall” feature must be available even when the
debug interface is disabled. Since the EEPROM
may not respond for up to 10 ms after a write oper-
ation, the time out for accessing the EEPROM is
set to approximately 17 ms. Therefore it takes
approximately 17 ms for a part without an
EEPROM to unlock after the release from reset.
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33234C
I/O
EEPROM
SCL
SDA
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