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Question on GPIO

Question asked by Nayani.Partha on May 8, 2016
Latest reply on May 9, 2016 by Nayani.Partha
Hi all,
I have seen a code where a GPIO pin is configured as output in push-pull mode but the pin is driven by an external circuit to low some times (essentially shorting the top transistor to GND). Is it safe to implement such a circuit? Will the I/O pin remain undamaged? Your comments please? Thank you.

PS: I have created a sample schematic for clear understanding of my question.