DBLOCKSIZE=B_0x0, FIFORST=B_0x0, DTMODE=B_0x0, RWMOD=B_0x0, DTEN=B_0x0, BOOTACKEN=B_0x0, DTDIR=B_0x0, RWSTOP=B_0x0
SDMMC data control register
| DTEN | Data transfer enable bit This bit can only be written by firmware when DPSM is inactive (DPSMACT = 0). This bit is cleared by Hardware when data transfer completes. This bit must only be used to transfer data when no associated data transfer command is used, i.e. must not be used with SD or e.MMC cards. 0 (B_0x0): Do not start data transfer without CPSM data transfer command. 1 (B_0x1): Start data transfer without CPSM data transfer command. |
| DTDIR | Data transfer direction selection This bit can only be written by firmware when DPSM is inactive (DPSMACT = 0). 0 (B_0x0): From host to card. 1 (B_0x1): From card to host. |
| DTMODE | Data transfer mode selection This bit can only be written by firmware when DPSM is inactive (DPSMACT = 0). 0 (B_0x0): Block data transfer ending on block count. 1 (B_0x1): SDIO multibyte data transfer. 2 (B_0x2): e.MMC Stream data transfer. (WIDBUS must select 1-bit wide bus mode) 3 (B_0x3): Block data transfer ending with STOP_TRANSMISSION command (not to be used with DTEN initiated data transfers). |
| DBLOCKSIZE | Data block size This bit can only be written by firmware when DPSM is inactive (DPSMACT = 0). Define the data block length when the block data transfer mode is selected: When DATALENGTH is not a multiple of DBLOCKSIZE, the transfered data is truncated at a multiple of DBLOCKSIZE. (None of the remaining data are transfered.) When DDR = 1, DBLOCKSIZE = 0000 must not be used. (No data are transfered) 0 (B_0x0): Block length = 20 = 1 byte 1 (B_0x1): Block length = 21 = 2 bytes 2 (B_0x2): Block length = 22 = 4 bytes 3 (B_0x3): Block length = 23 = 8 bytes 4 (B_0x4): Block length = 24 = 16 bytes 5 (B_0x5): Block length = 25 = 32 bytes 6 (B_0x6): Block length = 26 = 64 bytes 7 (B_0x7): Block length = 27 = 128 bytes 8 (B_0x8): Block length = 28 = 256 bytes 9 (B_0x9): Block length = 29 = 512 bytes 10 (B_0xA): Block length = 210 = 1024 bytes 11 (B_0xB): Block length = 211 = 2048 bytes 12 (B_0xC): Block length = 212 = 4096 bytes 13 (B_0xD): Block length = 213 = 8192 bytes 14 (B_0xE): Block length = 214 = 16384 bytes |
| RWSTART | Read Wait start If this bit is set, Read Wait operation starts. |
| RWSTOP | Read Wait stop This bit is written by firmware and auto cleared by hardware when the DPSM moves from the R_W state to the Wait_R or Idle state. 0 (B_0x0): No Read Wait stop. 1 (B_0x1): Enable for Read Wait stop when DPSM is in the R_W state. |
| RWMOD | Read Wait mode This bit can only be written by firmware when DPSM is inactive (DPSMACT = 0). 0 (B_0x0): Read Wait control using SDMMC_D2 1 (B_0x1): Read Wait control stopping SDMMC_CK |
| SDIOEN | SD I/O interrupt enable functions This bit can only be written by firmware when DPSM is inactive (DPSMACT = 0). If this bit is set, the DPSM enables the SD I/O card specific interrupt operation. |
| BOOTACKEN | Enable the reception of the boot acknowledgment This bit can only be written by firmware when DPSM is inactive (DPSMACT = 0). 0 (B_0x0): Boot acknowledgment disabled, not expected to be received 1 (B_0x1): Boot acknowledgment enabled, expected to be received |
| FIFORST | FIFO reset, flushes any remaining data This bit can only be written by firmware when IDMAEN= 0 and DPSM is active (DPSMACT = 1). This bit only takes effect when a transfer error or transfer hold occurs. 0 (B_0x0): FIFO not affected. 1 (B_0x1): Flush any remaining data and reset the FIFO pointers. This bit is automatically cleared to 0 by hardware when DPSM gets inactive (DPSMACT = 0). |