Datasheet

28.10.12 FIFO Space

Name: FIFOSPACE

Offset: 0x34

Reset: 0x0000

Property: -

This register allows the user to identify the number of bytes present in each TX and RX FIFO.

Bit 15 14 13 12 11 10 9 8

RXSPACE[4:0]

Access

R R R R R

Reset 0 0 0 0 0

Bit 7 6 5 4 3 2 1 0

TXSPACE[4:0]

Access

R R R R R

Reset 0 0 0 0 0

Bits 12:8 – RXSPACE[4:0] RX FIFO Filled Space

These bits return the number filled locations in the RX FIFO (bytes or words, depending on

CTRLC.DATA32B setting).

Bits 4:0 – TXSPACE[4:0] TX FIFO Empty Space

These bits return the number of available locations in the TX FIFO (bytes or words, depending on

CTRLC.DATA32B setting).

SAM D21 Family

SERCOM I2C – Inter-Integrated Circuit

Datasheet Complete

DS40001882D-page 623