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The UART device operates in three modes:
To be used as a UART, the operating mode must be programmed appropriately in the UART_MDR1[2-0] MODE_SELECT bit field to select UART, IrDA, or CIR mode, and the UART_MDR3[4] DIR_EN bit field to select RS-485 mode.
The UART uses a wired interface for serial communication with a remote device.
The UART is functionally compatible with the TL16C750 UART and earlier designs such as the TL16C550.
Figure 12-238 shows the UART frame data format.