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How to detect M.2 SDIO properly on imx8M-EVK board?

Question asked by garyjiang on Jul 5, 2018

Hi,

 

It seems the detection pin for M.2 SDIO interface is missing. Currently in order for M.2 SDIO to be read/written, a dummy micro-sd card should be plugged into the micro-sd slot on the board. Basically the M.2 SDIO detection replies on the DET PIN from micro-sd card.

 

Is there a proper way for M.2 SDIO to work without micro-sd card getting involved?

 

See the schematic attached.

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