40.7.4 32.768 kHz Crystal Oscillator

The PIC32CM6408PL10 32.768 kHz crystal oscillator is optimized for very low power consumption; therefore, close attention must be paid when selecting crystals.

Figure 40-10. 32.768 kHz Crystal Oscillator Schematics
Note: 32.768 kHz crystal selection must be done using both the crystal data sheet and the crystal oscillator parameters given in the XOSC32K Electrical Specifications from the Electrical Characteristics chapter.
Table 40-5. 32.768 kHz Crystal Oscillator Checklist
Signal NameDescriptionRecommended Pin Connection
XIN32External Crystal.

Crystal frequency range is specified in the XOSC32K Electrical Characteristics (XOSC32K_1 parameter).

C1 Load Capacitor (1,2)
XOUT32C2 Load Capacitor (1,2)
Note:
  1. The capacitors must be placed close to the device.
  2. The calculation for crystal load capacitors is provided in the XOSC32K Electrical Characteristics.