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.
| 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.