Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG11B/EFM32GG11B110F2048IM64/CRYOTIMER/IFC#0x0
Interrupt Flag Clear Register
Clear PERIOD Interrupt Flag
https://github.com/cmsis-svd/cmsis-svd-data