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

SAM4E [DATASHEET]

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

1128

Name: HSMCI_CMDR

0x40080014

Access: Write-only 

 

This register is write-protected while CMDRDY is 0 in HSMCI_SR. If an Interrupt command is sent, this register is only writ-
able by an interrupt response (field SPCMD). This means that the current command execution cannot be interrupted or 
modified.



This is the command index.





31

30

29

28

27

26

25

24

–

–

–

–

BOOT_ACK

ATACS

IOSPCMD

23

22

21

20

19

18

17

16

–

–

TRTYP

TRDIR

TRCMD

15

14

13

12

11

10

9

8

–

–

–

MAXLAT

OPDCMD

SPCMD

7

6

5

4

3

2

1

0

RSPTYP

CMDNB

0

NORESP

No response

1

48_BIT

48-bit response

2

136_BIT

136-bit response

3

R1B

R1b response type

0

STD

Not a special CMD.

1

INIT

Initialization CMD:
74 clock cycles for initialization sequence.

2

SYNC

Synchronized CMD:
Wait for the end of the current data block transfer before sending the pending command.

3

CE_ATA

CE-ATA Completion Signal disable Command.
The host cancels the ability for the device to return a command completion signal on the command line.

4

IT_CMD

Interrupt command:
Corresponds to the Interrupt Mode (CMD40).

5

IT_RESP

Interrupt response:
Corresponds to the Interrupt Mode (CMD40).

6

BOR

Boot Operation Request.
Start a boot operation mode, the host processor can read boot data from the MMC device directly.

7

EBO

End Boot Operation.
This command allows the host processor to terminate the boot operation mode.