Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 365

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

Name:   CRCCU_MR

Address:0x40044038

Access: Read Write

Reset:    0x00000000

If set to one, this bit indicates that the CRCCU DMA will compare the CRC computed on the data stream with the value stored.

in the TR_CRC reference register. If a mismatch occurs, the ERRISR bit in the CRCCU_ISR register is set.

CRCCU DMA performs successive transfers. It is possible to reduce the bandwidth drained by the CRCCU DMA by programming 
the DIVIDER field. The transfer request frequency is divided by 2^(DIVIDER+1).

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

–

15

14

13

12

11

10

9

8

–

–

–

–

–

–

–

–

7

6

5

4

3

2

1

0

DIVIDER

PTYPE

COMPARE

ENABLE

0

CCITT8023

Polynom 0x04C11DB7

1

CASTAGNOLI

Polynom 0x1EDC6F41

2

CCITT16

Polynom 0x1021