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G400D PA13 disappears?


#1

Hi Everyone, I’m glad to join the community on this new forum.

Just a question, what happen to PA13 on G400D? I am designing a new custom board based on g400d and would like to be able to upgrade the board as deeply as possible. Should I expose PA13 on the board?


#2

PA13, along with PA11 and PA12, are mapped to SPI1 which is used by the flash chip for the G400D. They are only usable as SPI pins, not GPIO.


#3

I know that but in the past this pin was need to upgrade the bootloader. My question then is should I expose this pin in my new PCB in order to ground it and then access through samba tools?


#4

Yes, exposing that pin in your design is recommend so that you can perform device recovery and updates if needed.


#5

This is already answered under “Design consideration” -> “required pins” in the G400 datasheet.

Isn’t this what you need?


#6

Ho I forgot to reread the Datasheet… blame on me :confounded: