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POR RESET never work.

kkim6
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Hi. I'm developing a custom wireless board using STM32WB09TEF7TR microcontroller.

 

Currently, my microcontroller doesn't reset when the VDD supply is turned on. (Power-on-reset, PORRSTF bit)

The microcontroller can only be reset by pulling-down the reset pin.

 

Is there any possible reason that causes this kind of behavior?

 

 

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