31.1 Overview

The device supports up to three SERCOM modules. Two SERCOM’s (SERCOM0/1) can be configured to support a number of modes: I²C, SPI and USART. One of the SERCOM (SERCOM2) has only I²C functionality. When an instance of SERCOM is configured and enabled, all of the resources of that SERCOM instance is dedicated to the selected mode.

The SERCOM serial engine consists of a transmitter and receiver, baud-rate generator and address-matching functionality and mode-specific transmitter and receiver logic. It can use the internal generic clock or an external clock.