SAM4L Datasheet, PDF (442/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

18.5.13 Parameter Register
Name:
Parameter
Access Type:
Read-only
Offset:
0xF8
Reset Value:
-
31
30
29
28
27
26
-
-
-
-
-
-
23
22
21
20
19
18
-
-
-
-
-
-
15
14
13
12
11
10
-
-
-
-
-
-
7
6
5
4
3
2
-
-
-
OPMODE
• CTRMEAS: Countermeasures
CTRMEAS
0
1
Description
Countermeasures not implemented
Countermeasures implemented
• OPMODE: Maximum Number of Confidentiality Modes of Operation
OPMODE
0
1
2
3
4
Description
ECB only
ECB and CBC only
ECB, CBC, and CFB only
ECB, CBC, CFB, and OFB only
ECB, CBC, CFB, OFB, and CTR
• KEYSIZE: Maximum Key Size
KEYSIZE
0
1
2
Description
128-bit only
128- and 192-bit only
128-, 192-, and 256-bit only
42023C–SAM–02/2013
ATSAM4L4/L2
25
24
-
-
17
16
-
-
9
8
-
CTRMEAS
1
0
KEYSIZE
442