Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/MGM13/MGM13S12F512GA/PCNT0/SYNCBUSY#0x0
Synchronization Busy Register
CTRL Register Busy
CMD Register Busy
TOPB Register Busy
OVSCFG Register Busy
https://github.com/cmsis-svd/cmsis-svd-data