Datasheet

26.3.1 SFIOR – Analog Comparator Control and Status Register

Name: SFIOR

Offset: 0x30

Reset: N/A

Property: When addressing I/O Registers as data space the offset address is 0x50

When using the I/O specific commands IN and OUT, the I/O addresses 0x00 - 0x3F must be used. When

addressing I/O Registers as data space using LD and ST instructions, 0x20 must be added to these offset

addresses.

Bit 7 6 5 4 3 2 1 0

ACME

Access

R/W

Reset 0

Bit 3 – ACME Analog Comparator Multiplexer Enable

When this bit is written logic one and the ADC is switched off (ADEN in ADCSRA is zero), the ADC

multiplexer selects the negative input to the Analog Comparator. When this bit is written logic zero, AIN1

is applied to the negative input of the Analog Comparator. For a detailed description of this bit, see

Analog Comparator Multiplexed Input table.