SD-Card connect to STM32H7x3
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‎2019-03-18 12:51 AM
Hello,
I would like to start a new design based on STM32H7x3.
The STM32H7 Evalboard uses a dual voltage level translator between MCU and SD-Card. But this required some extra pins (DIR_0,DIR_1_3, CLK_FB, DIR_CMD) that I need for anothere peripheral.
Could someone confirm that I can directly connect a SD-Card (or eMMC in 4bit mode) only using DATA[0..3], CMD, CLK instead?
Does anyone know of a Evalbord that connects a SD-Card in this "simpe" way to the MCU?
Thank you.
- Labels:
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SDIO-SDMMC
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STM32H7 Series
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‎2019-03-18 01:00 AM
Check schematics of F746-Discovery kit.
https://www.st.com/en/evaluation-tools/32f746gdiscovery.html
You may do it with 6 pins for 4-bit SDIO.
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‎2019-03-18 01:28 AM
I've used SD and eMMC directly using classic wiring on NUCLEO H743ZI​
​
I have an other board, also without transceiver.
Up vote any posts that you find helpful, it shows what's working..
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‎2019-03-18 01:36 AM
thank you.
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