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 |