Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

1123

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

Name: HSMCI_MR

0x40080004

Access: Read/Write

This register can only be written if the WPEN bit is cleared in the 



High Speed MultiMedia Card Interface clock (MCCK or HSMCI_CK) is Master Clock (MCK) divided by 
({CLKDIV,CLKODD}+2).



High Speed MultiMedia Card Interface clock is divided by 2

(PWSDIV)

 + 1 when entering Power Saving Mode.

Warning: This value must be different from 0 before enabling the Power Save Mode in the HSMCI_CR (HSMCI_PWSEN 
bit).



Enabling Read Proof allows to stop the HSMCI Clock during read access if the internal FIFO is full. This will guarantee data 
integrity, not bandwidth.

0: Disables Read Proof.

1: Enables Read Proof.



Enabling Write Proof allows to stop the HSMCI Clock during write access if the internal FIFO is full. This will guarantee 
data integrity, not bandwidth.

0: Disables Write Proof.

1: Enables Write Proof.



Enabling Force Byte Transfer allow byte transfers, so that transfer of blocks with a size different from modulo 4 can be 
supported.

Warning: BLKLEN value depends on FBYTE.

0: Disables Force Byte Transfer.

1: Enables Force Byte Transfer.

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

CLKODD

15

14

13

12

11

10

9

8

PDCMODE

PADV

FBYTE

WRPROOF

RDPROOF

PWSDIV

7

6

5

4

3

2

1

0

CLKDIV