Datasheet

SFDE INTENSET.RXS INTENSET.RXC Description

0 X X Start-of-frame detection disabled.

1 0 0 Reserved

1 0 1 Start-of-frame detection enabled. RXC wakes up the device

from all sleep modes.

1 1 0 Start-of-frame detection enabled. RXS wakes up the device

from all sleep modes.

1 1 1 Start-of-frame detection enabled. Both RXC and RXS wake

up the device from all sleep modes.

Bit 8 – COLDEN Collision Detection Enable

This bit enables collision detection.

This bit is not synchronized.

Value Description

Collision detection is not enabled.

Collision detection is enabled.

Bit 6 – SBMODE Stop Bit Mode

This bit selects the number of stop bits transmitted.

This bit is not synchronized.

Value Description

One stop bit.

Two stop bits.

Bits 2:0 – CHSIZE[2:0] Character Size

These bits select the number of bits in a character.

These bits are not synchronized.

CHSIZE[2:0] Description

0x0 8 bits

0x1 9 bits

0x2-0x4 Reserved

0x5 5 bits

0x6 6 bits

0x7 7 bits

SAM D21 Family

SERCOM USART

Datasheet Complete

DS40001882D-page 493