Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAML11E14A/SERCOM0/USART/STATUS#0x0
USART Status
Parity Error
Frame Error
Buffer Overflow
Clear To Send
Inconsistent Sync Field
Collision Detected
Transmitter Empty
Maximum Number of Repetitions Reached
https://github.com/cmsis-svd/cmsis-svd-data