The eUSCI modules are used for serial data communication. The eUSCI module supports synchronous communication protocols such as SPI (3 or 4 pin) and I2C, and asynchronous communication protocols such as UART, enhanced UART with automatic baud-rate detection, and IrDA.
The eUSCI_An module provides support for SPI (3 or 4 pin), UART, enhanced UART, and IrDA.
The eUSCI_Bn module provides support for SPI (3 or 4 pin) and I2C.
Two eUSCI_A modules and two eUSCI_B modules are implemented.