OPDCMD=PUSHPULL, TRTYP=SINGLE, MAXLAT=5, SPCMD=STD, ATACS=NORMAL, TRDIR=WRITE, RSPTYP=NORESP, TRCMD=NO_DATA, IOSPCMD=STD
Command Register
| CMDNB | Command Number |
| RSPTYP | Response Type 0 (NORESP): No response 1 (48_BIT): 48-bit response 2 (136_BIT): 136-bit response 3 (R1B): R1b response type |
| SPCMD | Special Command 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. |
| OPDCMD | Open Drain Command 0 (PUSHPULL): Push pull command. 1 (OPENDRAIN): Open drain command. |
| MAXLAT | Max Latency for Command to Response 0 (5): 5-cycle max latency. 1 (64): 64-cycle max latency. |
| TRCMD | Transfer Command 0 (NO_DATA): No data transfer 1 (START_DATA): Start data transfer 2 (STOP_DATA): Stop data transfer |
| TRDIR | Transfer Direction 0 (WRITE): Write. 1 (READ): Read. |
| TRTYP | Transfer Type 0 (SINGLE): MMC/SD Card Single Block 1 (MULTIPLE): MMC/SD Card Multiple Block 2 (STREAM): MMC Stream 4 (BYTE): SDIO Byte 5 (BLOCK): SDIO Block |
| IOSPCMD | SDIO Special Command 0 (STD): Not an SDIO Special Command 1 (SUSPEND): SDIO Suspend Command 2 (RESUME): SDIO Resume Command |
| ATACS | ATA with Command Completion Signal 0 (NORMAL): Normal operation mode. 1 (COMPLETION): This bit indicates that a completion signal is expected within a programmed amount of time (HSMCI_CSTOR). |
| BOOT_ACK | Boot Operation Acknowledge |