The eUSCI modules are used for serial data communication. The eUSCI module supports synchronous communication protocols such as SPI (3-pin 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-pin or 4-pin), UART, enhanced UART, and IrDA.
The eUSCI_Bn module provides support for SPI (3-pin or 4-pin) and I2C.
MSP432P4x1xT devices offer up to four eUSCI_A and four eUSCI_B modules.