34.6.1 Overview

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

The USART uses the SERCOM transmitter and receiver, BAUD Rate Generator, and either an internal or external clock.

The transmitter consists of a 16-byte FIFO, 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 16-byte FIFO and a Shift register. Status information of the received data is available for error checking. Data and clock recovery units ensure robust synchronization and noise filtering during asynchronous data reception.