STM32MP135F pad slew-rate / speed settings

[aloiseau]

Hi

 

I have a board based on a STM32MP135F. I can see that CLK signal of my sdcard (SDMMC1) very look like a 50 MHz sinusoidal instead of a clock. I have tested with and without my 22 Ohm resistor on this line and I am now looking into the device-tree/pinmux.

I can alter slew-rate in my DTS, but sadly I fail to find datasheet about this to know which value would suit best.

Commercial presentations tells about 4 speed values from slow to very-fast, reference manual tells about GPIOx_OSPEEDER, but I can't find more.

 

Were can I find pad setting documentation?

Otherwise, which are the characteristics of slew-rate values?

 

Best regards.