ALXD800EEXJ2VD C3 AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD C3 Datasheet - Page 525

• Manufacturer Part Number: ALXD800EEXJ2VD C3
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD C3

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

Security Block Register Descriptions
6.12.3.9 SB Length B (SB_LENGTH_B)
SB Memory Offset 028h
Type
Reset Value
6.12.3.10 SB Writable Key 0 (SB_WKEY_0)
SB Memory Offset 030h
Type
Reset Value
AMD Geode™ LX Processors Data Book
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31:4
31:0
Bit
3:0
Bit
WKEY_ 0
Name
LENGTH_B
RSVD
Name
R/W
00000000h
WO
00000000h
Description
Writable Key 0. Bits [31:0] of the Writable Key for the Security Block. This register
should not be changed during an AES encryption or decryption operation. To prevent
one process from reading the key written by another process, this register is not read-
able.
Description
Length B. The Length field is a 32-bit value that describes the number of bytes to be
encrypted or decrypted in the next operation using pointer set B. The lower four bits
must be written as zero and always read zero. This forces the data length to be an inte-
ger number of 16-byte blocks. This register should not be changed during an AES
encryption or decryption operation using the A pointer set (i.e., while STA is asserted,
SB Memory Offset 000h[0] = 1). This register can be modified during an operation using
the B pointer set (while STB is asserted, SB Memory Offset 004h[0] = 1).
Reserved. Set to 0.
SB_LENGTH_B Register Bit Descriptions
SB_LENGTH_B Register Map
SB_WKEY_0
SB_W_KEY0
LENGTH_B
W_EY_0[31:0]
Bit Descriptions
Register Map
9
9
8
8
33234H
7
7
6
6
5
5
4
4
3
3
RSVD
2
2
1
1
525
0
0