SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
Each UART performs the functions of parallel-to-serial and serial-to-parallel conversions. It is similar in functionality to a 16C550 UART, but is not register compatible.
The UART is configured for transmit or receive through the TXE and RXE bits of the UART Control (UARTCTL) register (see Section 26.5.8). Transmit and receive are both enabled out of reset. Before any control registers are programmed, the UART must be disabled by clearing the UARTEN bit in UARTCTL. If the UART is disabled during a TX or RX operation, the current transaction is completed prior to the UART stopping.
The UART module also includes a serial IR (SIR) encoder and decoder block that can be connected to an infrared transceiver to implement an IrDA SIR physical layer. The SIR function is programmed using the UARTCTL register.