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How could I use the 4-bit width SD Card with FATFS on F746-Disco

Question asked by Lingjun Kong on Jul 17, 2017
Latest reply on Aug 3, 2017 by Lingjun Kong

at the thread: SD Card Cannot be mounted successfully using the Code generated by CubeMX 

I set the sd card as 4-bit width as mentioned on that thread. but cannot mount the sd card.

 

john doe suggest me use 1-bit width and the system could work well.

 

so my question is, why it couldn't work when I config the width as 4bit? how should I use the 4-bit sdio on F746?

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