52.6.2 Crystal Oscillator

Figure 52-7. Crystal Oscillator Schematics

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

Note: Crystal selection must be done using the “Crystal Data Sheet” and the “Crystal Oscillator Parameters” given in the XOSC Electrical Specifications from the “Electrical Characteristics” chapter.
Table 52-4. Crystal Oscillator Checklist
Signal NameDescriptionRecommended Pin Connection
XINExternal Crystal

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

C1 Load Capacitor
XOUTC2 Load Capacitor