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STM32F429: GPIO logic level during power on

Question asked by shiwei luan on Mar 27, 2018
Latest reply on Mar 27, 2018 by waclawek.jan

What is the logic level of GPIO pins of STM32F429 during powering on?

I am using several GPIO pins as enable pins to enable downstream devices. These GPIOs must be "LOW" during power on until the firmware actively enables them.

I tried to find information from datasheet, but this information is not specified. My question is: when STM32F429 is being powered on and before the firmware takes care of GPIO configurations, what is the status of GPIO, HIGH, LOW or HIGH Z?

 

Thank you.

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