6.2.3 SERCOM USART and I2C Configurations

The SAM L22 has up to six instances of the serial communication interface (SERCOM) peripheral. The following table lists the supported communication protocols for each SERCOM instance.

Table 6-5. SERCOM USART and I2C Protocols
SERCOM Instance
Protocol SERCOM0 SERCOM1 SERCOM2 SERCOM3 SERCOM4 SERCOM5
I2C no yes yes yes yes yes
I2C at 3.4MHz no yes no no no yes
USART

including RS485 and ISO 7816

yes yes yes yes yes yes
SPI yes yes yes yes yes yes
Note: Not all available I2C pins support I2C mode at 3.4MHz.