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Tesla DeLorean
Tesla DeLorean
Guru
June 10, 2019

https://community.st.com/s/question/0D50X0000Aurs9QSQQ/stm32f103-sdiofatfs-interface-project-not-working

Perhaps look at STM3240G-EVAL card schematic. I'd recommend 33-47K pull-ups on D0,D1,D2,D3,CMD, nothing on CLK, and a pull-up on a Card Detect pin depending on the configuration/construction of the socket.

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Tesla DeLorean
Tesla DeLorean
Guru
June 10, 2019

https://community.st.com/s/question/0D50X0000AqDVtUSQW/hi-i-wanted-interface-stm32f401re-nucleo-to-sdio4-bitfatfs-sd-card-can-anyone-help-me-to-construct-the-hardware-circuitfor-this

Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
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