SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
The connections required to use the UART port are the following two pins: UART0 TX and UART0 RX. The device communicating with the bootloader drives the UART0 RX pin on the CC13x2x7 and CC26x2x7 device platform, while the CC13x2x7 and CC26x2x7 device platform drives the UART0 TX pin.
While the baud rate is flexible, the UART serial format is fixed at 8 data bits, no parity, and 1 stop bit. The bootloader automatically detects the baud rate for communication.