10.4.1 Primary Oscillator Pin Functionality

The Primary Oscillator pins (OSCI and OSCO) can be used for other functions when the Primary Oscillator is not being used. The POSCMD[1:0] Configuration bits in the Oscillator Configuration register (FOSC[1:0]) determine the oscillator pin function. The OSCIOFNC bit (FOSC[2]) determines the OSCO/CLKO pin function. By default, the CLKO function is active and the pin will output a clock frequency of F_CY. A clock signal is present on the OSCO/CLKO pin when device is unprogrammed or during the programming sequence. Care should be taken when the OSCO/CLKO pin is used to drive other circuity.