32.4 Signal Description

Signal NameTypeDescription
PAD[0]Digital I/OSDA
PAD[1]Digital I/OSCL
PAD[2]Digital I/OSDA_OUT (4-wire operation)
PAD[3]Digital I/OSCL_OUT (4-wire operation)

One signal can be mapped on several pins.

Not all the pins are I2C pins.

Refer to the Pinout chapter for more information.

In order to use the I/O lines of this peripheral, the I/O pins must be configured using the I/O Pin Controller (PORT).

When the SERCOM is used in I2C mode, the SERCOM controls the direction and value of the I/O pins. If the receiver or transmitter is disabled, these pins can be used for other purposes.

All SERCOM I2C pins support the Fast Mode frequency. The High Speed frequency is only supported by the following pins:

Table 32-1. SERCOM Pins Supporting I2C High Speed Frequency
SERCOMPadsPackage
32-pins48-pins64-pins100-pins
0pad0PA08
pad1PA09
1pad0PA16
pad1PA17
2pad0PA08PA08, PA12
pad1PA09PA09, PA13
3pad0PA16, PA22
pad1PA17, PA23
4pad0NAPA12
pad1PA13
5pad0PA22
pad1PA23
6pad0NANAPC16
pad1PC17
7pad0PC16
pad1PC17