Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Fiche De Données
Codes de produits
ATSAM4E-XPRO
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.
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
30
29
28
27
26
25
24
IV
23
22
21
20
19
18
17
16
IV
15
14
13
12
11
10
9
8
IV
7
6
5
4
3
2
1
0
IV