4.2.5 Crystal Oscillator

The PIC32CM LS00 Curiosity Nano+ Touch Evaluation Kit has the option for a 32.768 kHz crystal. By default, the crystal is not connected; instead, the GPIOs are routed to the edge connector.

To use a crystal oscillator, some hardware modifications are required. The two I/O lines routed to the edge connector must be disconnected through the J12 and J13 cut points. Disconnecting the GPIO route will reduce the chance of crystal contention and remove excessive line capacitance.