Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Data Sheet
Product codes
AT32UC3A3-XPLD
910
32072H–AVR32–10/2012
AT32UC3A3
33.5.10
Initialization Vector n Register
Name: IVnR
Access Type: Write-only
Offset:
0x60 + (n-1)*0x04
Reset Value:
0x00000000
• IVn[31:0]: Initialization Vector n
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:
IV1 corresponds to the first word of the Initialization Vector, IV4 to the last one.
This field is always read as zero to prevent the Initialization Vector from being read by another application.
31
30
29
28
27
26
25
24
IVn[31:24]
23
22
21
20
19
18
17
16
IVn[23:16]
15
14
13
12
11
10
9
8
IVn[15:8]
7
6
5
4
3
2
1
0
IVn[7:0]
MODE(OPMODE.
Description
CBC,OFB, CFB
initialization vector
CTR
counter value
ECB
not used, must not be written