The datasheet says that the absolute maximum input voltage on a pin is Vcc+.5.
If I place a resistor (e.g. in series) on the input pin, will it increase the maximum voltage a pin can withstand?
I'm asking because I have a circuit which I believe is a 5V circuit but also uses a 9V supply. I'd like to protect my uC pins from inadvertent connection to a 9V signal.