Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Holtek/HT32F275x/USART0/USART0_LSR#0x0
USART0_LSR
RFDR
OEI
PEI
FEI
BII
TXFEMPT
TXEMPT
ERRRX
RSADDEF
Reserved.
https://github.com/cmsis-svd/cmsis-svd-data