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STM32L4P5 PB9 pin states in reset

_EFrie
Associate III

Why does PB9 idle high in reset for the STM32L4P5?  At least I'd like to know this the next time I design a board, where I could find this reference.  Full part is STM32L4P5RET although I'm guessing its the same across multiple parts.

2 REPLIES 2

PB3 / PB4 based on default GPIO MODER RM0432

Perhaps CAN1_TX PB9 involvement per AN2606 in the Boot Loader, not if your code runs.

Tips, buy me a coffee, or three.. PayPal Venmo Up vote any posts that you find helpful, it shows what's working..

On what hardware do you see this?

How do you make sure the mcu is in reset?

How do you observe the pin in question?

JW