Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

1012

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

Name: AES_MR

0xF000C004

Access: Read-write 

0: Decrypts data.

1: Encrypts data.

The Processing Time represents the number of clock cycles that the AES needs in order to perform one encryption/decryption.

Note:

The best performance is achieved with PROCDLY equal to 0.

Values which are not listed in the table must be considered as “reserved”.

If a DMA transfer is used, 0x2 must be configured. Refer to 

 for more details.

Values which are not listed in the table must be considered as “reserved”.

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

CKEY

–

CFBS

15

14

13

12

11

10

9

8

LOD

OPMOD

KEYSIZE

SMOD

7

6

5

4

3

2

1

0

PROCDLY

DUALBUFF

–

–

CIPHER

0x0

INACTIVE

AES_IDATARx cannot be written during processing of previous block.

0x1

ACTIVE

AES_IDATARx can be written during processing of previous block when SMOD = 0x2. It 
speeds up the overall runtime of large files.

0x0

MANUAL_START

Manual Mode

0x1

AUTO_START

Auto Mode

0x2

IDATAR0_START

AES_IDATAR0 access only Auto Mode

0x0

AES128

AES Key Size is 128 bits

0x1

AES192

AES Key Size is 192 bits

0x2

AES256

AES Key Size is 256 bits

Processing Time

12

1

+

(

)

×

=