How do I connect a TCXO to an EFR32 Series 1 SoC?
A TCXO clock source can be used to supply the EFR32 main clock. Reconfiguration of the HFXO register settings in the Clock Management Unit will be required for operation with a TCXO. Consult the EFR32 Reference Manual for additional details regarding the following settings:
Be sure to physically connect the TCXO to the HFXTAL_N pin for the above register settings. The HFXTAL_P pin should be no-connect.