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

SAM4E [DATASHEET]

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

1130

DTOMUL and DTOCYC fields located in the HSMCI_DTOR. If the acknowledge pattern is not received then an acknowl-
edge timeout error is raised. If the acknowledge pattern is corrupted then an acknowledge pattern error is set.

Name: HSMCI_BLKR

0x40080018

Access: Read/Write 

 



This field determines the number of data byte(s) or block(s) to transfer.

The transfer data type and the authorized values for BCNT field are determined by the TRTYP field in the HSMCI Com-
mand Register (HSMCI_CMDR).

When TRTYP = 1 (MMC/SDCARD Multiple Block), BCNT can be programmed from 1 to 65535, 0 corresponds to an infi-
nite block transfer. 

When TRTYP = 4 (SDIO Byte), BCNT can be programmed from 1 to 511, 0 corresponds to 512-byte transfer. Values in 
range 512 to 65536 are forbidden.

When TRTYP = 5 (SDIO Block), BCNT can be programmed from 1 to 511, 0 corresponds to an infinite block transfer. Val-
ues in range 512 to 65536 are forbidden.

Warning: In SDIO Byte and Block modes (TRTYP = 4 or 5), writing the 7 last bits of BCNT field with a value which differs 
from 0 is forbidden and may lead to unpredictable results.



This field determines the size of the data block. 

Bits 16 and 17 must be configured to 0 if FBYTE is disabled.

Note: In SDIO Byte mode, BLKLEN field is not used.

31

30

29

28

27

26

25

24

BLKLEN

23

22

21

20

19

18

17

16

BLKLEN

15

14

13

12

11

10

9

8

BCNT

7

6

5

4

3

2

1

0

BCNT