Datasheet

647
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
31.6.10 AES Initialization Vector Register x
Name: AES_IVRx
Address: 0x40004060
Access: Write-only
 IV: Initialization Vector
The four 32-bit Initialization Vector Registers set the 128-bit Initialization Vector data block that is used by some modes of
operation as an additional initial input.
AES_IVR0 corresponds to the first word of the Initialization Vector, AES_IVR3 to the last one.
These registers are write-only to prevent the Initialization Vector from being read by another application.
For CBC, OFB and CFB modes, the IV input value corresponds to the initialization vector.
For CTR mode, the IV input value corresponds to the initial counter value.
Note: These registers are not used in ECB mode and must not be written.
31 302928 27 26 25 24
IV
23 22 21 20 19 18 17 16
IV
15 14 13 12 11 10 9 8
IV
76543 210
IV