reg_blocksize (SDIO) Register Description
| Register Name | reg_blocksize |
|---|---|
| Offset Address | 0x0000000004 |
| Absolute Address |
0x00FF160004 (SD0) 0x00FF170004 (SD1) |
| Width | 16 |
| Type | rwNormal read/write |
| Reset Value | 0x00000000 |
| Description | Configure the Number of Bytes in a Data Block. |
reg_blocksize (SDIO) Register Bit-Field Summary
| Field Name | Bits | Type | Reset Value | Description |
|---|---|---|---|---|
| sdma_bufboundary | 14:12 | rwNormal read/write | 0x0 | Write the size of the contiguous DMA buffer in the system memory. The System Address register is updated at every system boundary during the DMA transfer The DMA transfer waits at the every boundary specified by these fields and the SDIO controller generates the DMA interrupt to request the controller to update the System Address register. This function is active when the [DMA Enable] bit in the Transfer Mode register is set = 1. 000b: 4KB 001b: 8KB 010b: 16KB 011b: 32KB 100b: 64KB 101b: 128KB 110b: 256KB 111b: 512KB |
| xfer_blocksize | 11:0 | rwNormal read/write | 0x0 | Block size for data transfers for CMD17, CMD18, CMD24, CMD25 and CMD53. Read-only. Valid if no transaction is executing (i.e after a transaction has stopped). 0000h: No data transfer. 0001h: 1 byte 0002h: 2 bytes 0003h: 3 bytes .. 0200h: 512 bytes .. 0800h: 2048 bytes (maximum block size) |