13.22.1 Overview

The inter-integrated circuit ( I²C) interface is one of the available modes in the serial communication interface (SERCOM).

The I²C interface uses the SERCOM transmitter and receiver configured as shown in Figure 13-108. Labels in capital letters are registers accessible by the CPU, while lowercase labels are internal to the SERCOM. Each master and slave have a separate I²C interface containing a shift register, a transmit buffer and a receive buffer. In addition, the I²C master uses the SERCOM baud-rate generator, while the I²C slave uses the SERCOM address match logic.