Li Liang,
下面的信息可以在数据手册里面找到。
The device includes MMC/SD Controllers which are compliant with MMC V3.31, Secure Digital Part 1
Physical Layer Specification V1.1 and Secure Digital Input Output (SDIO) V2.0 specifications.
请参考e2e的论坛讨论:
https://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/100/t/149762