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526 AMD Geode™ LX Processors Data Book
Security Block Register Descriptions
33234H
6.12.3.11 SB Writable Key 1 (SB_WKEY_1)
6.12.3.12 SB Writable Key 2 (SB_WKEY_2)
SB Memory Offset 034h
Typ e WO
Reset Value 00000000h
SB_WKEY_1 Register Map
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
WKEY_1[63:32]
SB_WKEY_1 Bit Descriptions
Bit Name Description
31:0 WKEY_1 Writable Key 1. Bits [63:32] 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.
SB Memory Offset 038h
Typ e WO
Reset Value 00000000h
SB_WKEY_2 Register Map
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
WKEY_2[95:64]
SB_WKEY_2 Bit Descriptions
Bit Name Description
31:0 WKEY_2 Writable Key 2. Bits [95:64] 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.