Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32FG12P/EFR32FG12P433F1024GM68/CRYPTO1/DATA0BYTE#0x0
DATA0 Register Byte Access
Data 0 Byte Access
https://github.com/cmsis-svd/cmsis-svd-data