2023-11-06 10:01 AM
2023-11-06 10:14 AM
Perhaps, but I don't recall the F4 having a direction pin, or a clock feedback path. Some of the H7 have this to facilitate a buffer, and lower voltages in Ultra / DDR modes, etc.
Suspect you'd need to prototype and test.
There are eMMC that will work at 1.8V as I recall
2023-11-07 02:23 AM
Hi Tesla,
Thanks. The STM32F4 only supports SDIO v2.00 so it will only be running in non-UHS modes. The translators I shared are auto-directional so direction pin should not be required.
I don't entirely understand the purpose of clock feedback (provided by most SDIO voltage translators) and when would it be required. Could you share some thoughts?
2023-11-07 02:46 AM
The feedback clock allows the peripheral to handle the delay / skewing of the signals across the shifter in the return path.
I'd want to see this work before building hundreds of boards.
Look at H7 rather than F4