Hi, I am going to use this STM32H7 CPU at my board and I want to know what the GPIOs state during power up, configuration and reset.

IGAL TALOR · ‎2021-07-27

are the GPIOs at HI-z? pulled up? or Pulled down?

this is very important to me, I don't want to enable any circuit at start up.

TDK · ‎2021-07-27

Generally, they are in high impedance mode with no pullup/pulldown. Pins used for SWD/JTAG programming are the exception. The reference manual will provide this information in the GPIO registers section.

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IGAL TALOR · ‎2021-07-28

I tried to find it at the datasheet or application note, nothing about it.

where can I find explanation about it?

waclawek.jan · ‎2021-07-29

As TDK said:

The reference manual will provide this information in the GPIO registers section.

JW

Amel NASRI · ‎2021-08-04

Hi @IGAL TALOR ,

The application note STM32 GPIO configuration for hardware settings and low-power consumption (AN4899) should be useful for you.

-Amel

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