SWCU191 February 2022 CC1311P3 , CC1311R3 , CC2651P3 , CC2651R3 , CC2651R3SIPA
Each CC13x1x3 and CC26x1x3 UART performs the functions of parallel-to-serial and serial-to-parallel conversions. The CC13x1x3 and CC26x1x3 UART is similar in functionality to a 16C550 UART, but is not register compatible.
The UART is configured for transmit and receive through the UART Control Register (UART:CTL) TXE and RXE bits. Transmit and receive are both enabled out of reset. Before any control registers are programmed, the UART must be disabled by clearing the UART:CTL UARTEN register bit. If the UART is disabled during a transmit or receive operation, the current transaction completes before the UART stops.