Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Texas Instruments/CC26x0/UART0/FR#0x0
Flag Reads from this register return the UART flags.
CTS
BUSY
RXFE
TXFF
RXFF
TXFE
https://github.com/cmsis-svd/cmsis-svd-data