Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK Data Sheet
Product codes
ATSAM4L-XSTK
448
42023E–SAM–07/2013
ATSAM4L8/L4/L2
18.5.13
Parameter Register
Name: Parameter
Access Type: Read-only
Offset:
0xF8
Reset Value:
-
• CTRMEAS: Countermeasures
• OPMODE: Maximum Number of Confidentiality Modes of Operation
• KEYSIZE: Maximum Key Size
31
30
29
28
27
26
25
24
-
-
-
-
-
-
-
-
23
22
21
20
19
18
17
16
-
-
-
-
-
-
-
-
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
CTRMEAS
7
6
5
4
3
2
1
0
-
-
-
OPMODE
KEYSIZE
CTRMEAS
Description
0
Countermeasures not implemented
1
Countermeasures implemented
OPMODE
Description
0
ECB only
1
ECB and CBC only
2
ECB, CBC, and CFB only
3
ECB, CBC, CFB, and OFB only
4
ECB, CBC, CFB, OFB, and CTR
KEYSIZE
Description
0
128-bit only
1
128- and 192-bit only
2
128-, 192-, and 256-bit only