Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG12B/EFM32GG12B810F1024IL112/PDM/CFG1#0x0
PDM Core Configuration Register1
Prescalar Setting for PDM sample
https://github.com/cmsis-svd/cmsis-svd-data