Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG12B/EFM32GG12B530F512IL120/PDM/CMD#0x0
PDM Core Command Register
Start DCF
Stop DCF
Clear DCF
FIFO Flush
https://github.com/cmsis-svd/cmsis-svd-data