The Universal Asynchronous Receiver/Transmitter (UART) provides serial
communication capability with external devices through a level converter and an RS-232
cable or through use of external circuitry that converts infrared signals to electrical
signals (for reception) or transforms electrical signals to signals that drive an infrared
LED (for transmission) to provide low speed IrDA compatibility.
UART supports NRZ encoding format , RS485 compatible 9 bit data format and IrDAcompatible
infrared slow data rate (SIR) format.
You can refer to our reference design:
