46.7.2 Crystal Oscillator

Figure 46-8. Crystal Oscillator Schematic

The crystal should be located as close to the device as possible. Long signal lines may cause too high of a load to operate the crystal, and cause crosstalk to other parts of the system.

Note: Crystal selection must be done using both the crystal data sheet and the crystal oscillator parameters given in the XOSC Electrical Specifications from Electrical Characteristics chapter.
Table 46-4. Crystal Oscillator Checklist
Signal Name Description Recommended Pin Connection
XIN External Crystal

Crystal frequency range specified in the XOSC Electrical Specifications (XOSC_1 parameter)

 C1 Load Capacitor (1,2)
XOUT C2 Load Capacitor (1,2)
Note:
  1. The capacitors should be placed close to the device.
  2. Crystal Load Capacitors Calculation is given in the XOSC Electrical Specifications.