Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32MG1P/EFR32MG1P632F256IM32/CRYOTIMER/PERIODSEL#0x0
Interrupt Duration
Interrupts/Wakeup Events Period Setting
https://github.com/cmsis-svd/cmsis-svd-data