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Registers
4.8MMC Block Length Register (MMCBLEN)
The MMC block length register (MMCBLEN) specifies the data block length in bytes. This value must match the block length setting in the memory card.
The MMC block length register (MMCBLEN) is shown in Figure 25 and described in Table 13.
Figure 25. MMC Block Length Register (MMCBLEN)
31 |
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| 16 |
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| Reserved |
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15 | 12 | 11 | 0 |
| Reserved |
| BLEN |
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LEGEND: R/W = Read/Write; R = Read only;
Table 13. MMC Block Length Register (MMCBLEN) Field Descriptions
Bit | Field | Value | Description |
Reserved | 0 | Reserved | |
BLEN |
| Block length. This field is used to set the block length, which is the byte count of a data block. The | |
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| value 0 is prohibited. |
Note: The BLEN bits value must be the same as the CSD register settings in the MMC/SD card. To be precise, it should match the value of the READ_BL_LEN field for read, or WRITE_BL_LEN field for write.
SPRUE30B | Multimedia Card (MMC)/Secure Digital (SD) Card Controller | 49 |
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