29.2 Overview

The Universal Synchronous and Asynchronous Receiver and Transmitter (USART) is one of the available modes in the SERCOM — Serial Communication Interface.

The transmitter consists of a single write buffer, a shift register, and control logic for different frame formats. The write buffer supports data transmission without any delay between frames. The receiver consists of a two-level receive buffer and a shift register. Status information for the received data is available for error checking. Data and clock recovery units ensure robust synchronization and noise filtering during asynchronous data reception.