850
32072H–AVR32–10/2012
AT32UC3A3
TRTYP: Transfer Type
TRDIR: Transfer Direction
Writing a zero to this bit will configure the transfer direction as write transfer.
Writing a one to this bit will configure the transfer direction as read transfer.
TRCMD: Transfer Command
MAXLAT: Max Latency for Command to Response
Writing a zero to this bit will configure a 5-cycle max latency.
Writing a one to this bit will configure a 64-cycle max latency.
OPDCMD: Open Drain Command
Writing a zero to this bit will configure the push-pull command.
Writing a one to this bit will configure the open-drain command.
SPCMD: Special Command
TRTYP
Transfer Type
0
MMC/SDCard Single Block
1
MMC/SDCard Multiple Block
2
MMC Stream
3
Reserved
4
SDIO Byte
5SDIO Block
others
Reserved
TRCMD
Transfer Type
0
No data transfer
1
Start data transfer
2
Stop data transfer
3
Reserved
SPCMD
Command
0
Not a special CMD.
1
Initialization CMD:
74 clock cycles for initialization sequence.
2
Synchronized CMD:
Wait for the end of the current data block transfer before sending the pending command.
3
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
Interrupt command:
Corresponds to the Interrupt Mode (CMD40).
5
Interrupt response:
Corresponds to the Interrupt Mode (CMD40).
others
Reserved