Datasheet

444
42023E–SAM–07/2013
ATSAM4L8/L4/L2
18.5.9 Initialization Vector Registers
Name:
INITVECTn
Access Type: Write-only
Offset: 0x40 + (n * 0x04)
Reset Value: 0x00000000
• INITVECTn: Initialization Vector Word n
This register stores the n
th
word of the initialization vector or counter used by all confidentiality modes of operation, except the
ECB operation mode:
31 30 29 28 27 26 25 24
INITVECTn[31:24]
23 22 21 20 19 18 17 16
INITVECTn[23:16]
15 14 13 12 11 10 9 8
INITVECTn[15:8]
76543210
INITVECTn[7:0]
Confidentiality Mode of Operation Description
CBC, OFB, CFB Initialization vector
CTR Counter
ECB Not used