bytcnt
The number of bytes to be transferred.
| Module Instance | Base Address | Register Address |
|---|---|---|
| sdmmc | 0xFF704000 | 0xFF704020 |
Offset: 0x20
Access: RW
| Bit Fields | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
byte_count RW 0x200 |
|||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
byte_count RW 0x200 |
|||||||||||||||
bytcnt Fields
| Bit | Name | Description | Access | Reset |
|---|---|---|---|---|
| 31:0 | byte_count | This value should be an integer multiple of the Block Size for block transfers. For undefined number of byte transfers, byte count should be set to 0. When byte count is set to 0, it is responsibility of host to explicitly send stop/abort command to terminate data transfer. Note: In SDIO mode, if a single transfer is greater than 4 bytes and non-DWORD-aligned, the transfer should be broken where only the last transfer is non-DWORD-aligned and less than 4 bytes. For example, if a transfer of 129 bytes must occur, then the driver should start at least two transfers; one with 128 bytes and the other with 1 byte. |
RW | 0x200 |