Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Holtek/HT32F275x/USART1/USART1_IER#0x0
USART1_IER
RFTLI_RTOIE
TFTLIE
RLSIE
MODSIE
Reserved.
https://github.com/cmsis-svd/cmsis-svd-data