Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/BGM1/BGM121A256V2/LETIMER0/CMD#0x0
Command Register
Start LETIMER
Stop LETIMER
Clear LETIMER
Clear Toggle Output 0
Clear Toggle Output 1
https://github.com/cmsis-svd/cmsis-svd-data