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5V tolerant pin as output with pullup

Question asked by Mr_M_from_G on Apr 19, 2013
Latest reply on Apr 24, 2013 by kragelund.klaus

I need to replace a 5V-uC by a 3.3V type and maybe it will be a STM32F0xxx. Now there is one question concerning 5V tolerance: If the 3.3V-uC drives an output that has a pullup resistor to 5V, is that any problem because of current flowing into the output pin?

Thank you very much