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AM2634-Q1: How to implement SDIO CMD53.

Wei Yao
Prodigy 60 points
Part Number: AM2634-Q1

Tool/software:

We have implemented the SDIO function based on MMC/SD driver, including CMD5 CND3 CMD7 and CMD52.

But the CMD53 didn't implement now. Maybe there are some errors in my CMD53 trans configuration. You can see below picture.

Could you give us more information how to implement CMD53 read and write.

  • 0
    TI__Guru**** 197126 points

    Hi Yao,

    SDMMC CMD53 is a multi-byte or multi-block read/write command. It is not used in AM263x SDK. The SDK uses multiple commands to implement block reads and block writes, such as CMD18 for multi-block read and CMD25 for multi-block write. I knew that CMD53 simplifies this process by combining the multi-block or multi-byte transfer into a single, efficient command.

    You can try to replace the CMD18 or CMD25 with CMD53 manually, but we don't support it. 

  • 0
    TI__Prodigy 150 points

    Hi,
    Can you please let us know your use case? How is SDIO being used here?

    Regards,
    Shivank