short circuit effects on GPIO pins during mcu startup

[armindavatgaran]

Posted on January 29, 2017 at 21:31

Hello

What will happen to gpio pins that are connected to each other, during mcu startup and before their state is set (e.g input with pull up or output push pull) from excess current source/sink respective? is external pull up/down resistors necessary to avoid over current source/sinking for when the gpio state isn't set (startup, reset, etc)?

Thanks.

[Tesla DeLorean]

Posted on January 30, 2017 at 04:00

Other than the System Loader case the pins mostly reset into Hi-Z state, review the Reference Manual for your part.