Can pins connected to an external crystal be used for general purpose I/O?
I have a Curiosity High-Pin Count development board. For the 28-pin headers, a 32 kHz external crystal is connected to RC0 and RC1. This is not a crystal that I have added; it is hard-wired as part of the board. I do not need the external crystal for a current application, but don't want to try to remove it from the development board. If I use pins RC0 and RC1 as general purpose digital outputs, will it harm either the board or the PIC microcontroller I am using? I understand that doing so doesn't get me the external oscillator function; I don't need that. If I set RC0 digitally high and RC1 digitally low, for example, will that damage anything? Asked another way, will a constant voltage potential across a crystal harm either the crystal or the microcontroller supplying the voltage?