GPIO Output speed range STM32H7

[Gabriel T]

Hi,

I am working with STM32H743ZI

I was configuring GPIO output pins and I have to define "speed" which I assume is related to opamp slew rate. But I have a problem with the units, I can choose between "Very high", "High", "Medium", "Low". After reading the GPIO section of the reference manual I still don't know what these terms are referring to. Perhaps "Very High" = sysclk/2 and "High" = sysclk/4 etc.

Regards,

Gabriel

[TDK · Accepted solution]

It refers to drive strength. The achievable frequency will depend on the capacitance of the circuit and your drive voltage (and some other things).

See tables 160 and 161 (Output timing characteristics) in the datasheet for details on this:

https://www.st.com/resource/en/datasheet/stm32h743bi.pdf

[Ons KOOLI]

Hi Gabriel,

You can also find relevant details on the STM32 GPIO configuration for hardware setting sand low-power consumption Application Note provided by ST.

Best Regards,

Ons.