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STM32F030 Eval Board PORTF.0 Problem

Question asked by PICguy on Dec 3, 2014
I am using an ‘030 with its internal oscillator.  Thus I should be able to use F0 and F1 for anything any GPIO pin can be used for.  I turned on internal pullups on these pins and only F1 worked.  F0 read high or low randomly when the pin was open and when the pin was grounded.

My hardware guy put his scope on the pin.  8 MHz.  My guess is that the internal osc is somehow routed out through that pin.

FWIW, I’m running the CPU at 48 MHz.  Could there be any RCC setup that would cause this symptom?  

Or is this a known 030 problem that I have not read about?

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