How to use SD card in your own carrier board

I designed the circuit myself, used SDMMC3 as SDIO through the reference manual, and modified the corresponding device tree, but it didn’t work. After inserting the SD card, there was no response. Attach the device tree and schematic diagram I modified.


Hi, from HW design PoV, why don’t you follow the Design Guide as below showing? Why do you add pull-up to lines and not add load switch for VDD?

Can’t SDIO’s VDD be directly supplied by the pull-up resistor 3V3 like this? Can I use 3V3 and 1V8 to power SDIO according to the reference design?

Please follow Design Guide well to make your design first.

ok,thank you, i try

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