MODE=BLOCK_DATA_TRANSFER_, DIRECTION=FROM_CONTROLLER_TO_C, DMAENABLE=DMA_DISABLED_
Data control register.
| ENABLE | Data transfer enable. |
| DIRECTION | Data transfer direction 0 (FROM_CONTROLLER_TO_C): From controller to card. 1 (FROM_CARD_TO_CONTROL): From card to controller. |
| MODE | Data transfer mode 0 (BLOCK_DATA_TRANSFER_): Block data transfer. 1 (STREAM_DATA_TRANSFER): Stream data transfer. |
| DMAENABLE | Enable DMA 0 (DMA_DISABLED_): DMA disabled. 1 (DMA_ENABLED_): DMA enabled. |
| BLOCKSIZE | Data block length |
| RESERVED | Reserved. Read value is undefined, only zero should be written. |