Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32PG12B/EFM32PG12B500F1024GM48/MSC/ADDRB#0x0
Page Erase/Write Address Buffer
Page Erase or Write Address Buffer
https://github.com/cmsis-svd/cmsis-svd-data