3.5 Clock Circuitry

The PIC32CM SG00/GC00 generates its necessary clocks based on a slow clock (SLCK) oscillator running at 32.768 kHz. By default, in the PIC32CM SG00/GC00 Curiosity Pro board a low-power 32.768 kHz crystal oscillator, Y303, is assembled. For additional information about this crystal, refer to the “VMK3-9005-32K7680000 Data Sheet” (DS20006440) available at product webpage.

The PIC32CM SG00/GC00 provides a 32.768 kHz ultra-low power internal RC oscillator that can be used instead of the previous external crystal.

For evaluation purpose, the board also supports the use of a quartz crystal of 12 MHz (Y300) instead of using SLCK. For additional information about this crystal, refer to the “VXM8-9014-12M0000000 Data Sheet” available at product webpage.

Figure 3-7. Microcontroller Crystal’s Schematic

In addition to both crystal options for those frequencies, also available the Y302 and Y303 footprints to solder the following oscillators, featuring part numbers DSC6011JI3B-032K768 and DSC1001DI5-012.0000. For additional information about these oscillators, refer to the “DSC6011JI3B-032K768 Data Sheet” (DS20006133) and “DSC1001DI5-012.0000 Data Sheet” (DS20005529) available for download at product webpage.

Figure 3-8. Microcontroller Oscillator’s Schematic