28.2 Overview

There are two instances of the serial communication interface (SERCOM) peripheral.

SERCOM0 can be configured to support all three modes: I²C, SPI, and USART. SERCOM1 supports SPI and USART.

When an instance of SERCOM is configured and enabled, all of the resources of that SERCOM instance will be dedicated to the selected mode.

The SERCOM serial engine consists of a transmitter, a receiver, a baud rate generator, and address matching functionality. It can use either the internal generic clock or an external clock. Using an external clock allows the SERCOM to operate in all sleep modes.