Features

Interface for configuring into one of the following:
- Inter-Integrated Circuit (I²C) Two-wire Serial Interface
- System Management Bus (SMBus™) compatible
- Serial Peripheral Interface (SPI)
- Universal Synchronous/Asynchronous Receiver/Transmitter (USART)
Single transmit buffer and double receive buffer
Baud-rate generator
Address match/mask logic
Operational in all Sleep modes with an external clock source
Can be used with DMA

The following table lists the supported features for each SERCOM instance:

Table 1. SERCOM Features Summary
Protocol	SERCOM Instance
Protocol	SERCOM0	SERCOM1	SERCOM2
SPI	Yes	Yes	Yes
I²C ⁽¹⁾	Yes High-speed mode (≤ 3,4 Mbit/s)	Yes Fast plus Mode (≤ 1 Mbit/s)	No
USART	Yes including: Hardware Handshaking IrDA	Yes including: Hardware Handshaking IrDA	Yes including: Hardware Handshaking IrDA RS-485 Auto-baud mode LIN Client ISO7816
USART/SPI Receive Buffer Size	Two-level	Four-level	Two-level
Secure Pin Multiplexing (SAM L11 only)	No	Yes	No

Note:

1.I²C is not supported on all SERCOM pins. Refer to the ²SERCOM IC Pins table for more details.