Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG12B/EFM32GG12B410F1024GQ64/USART2/RXDATAX#0x0
RX Buffer Data Extended Register
RX Data
Data Parity Error
Data Framing Error
https://github.com/cmsis-svd/cmsis-svd-data