29.5.2 MUX Control A


Bit	7	6	5	4	3	2	1	0
	INVERT			MUXPOS[1:0]			MUXNEG[1:0]
Access	R/W			R/W	R/W		R/W	R/W
Reset	0			0	0		0	0

Bit 7 – INVERT Invert AC Output

Writing this bit to ‘1’ enables inversion of the output of the AC. This inversion has to be taken into account when using the AC output signal as an input signal to other peripherals or parts of the system.

Bits 4:3 – MUXPOS[1:0] Positive Input MUX Selection

Writing to this bit field selects the input signal to the positive input of the AC.


Value	Name	Description
`0x0`	AINP0	Positive pin 0
`0x1`	AINP1	Positive pin 1
`0x2`	AINP2	Positive pin 2
`0x3`	AINP3	Positive pin 3

Bits 1:0 – MUXNEG[1:0] Negative Input MUX Selection

Writing to this bit field selects the input signal to the negative input of the AC.


Value	Name	Description
`0x0`	AINN0	Negative pin 0
`0x1`	AINN1	Negative pin 1
`0x2`	AINN2	Negative pin 2
`0x3`	DACREF	Voltage reference

Name:	MUXCTRLA
Offset:	0x02
Reset:	0x00
Property:	-

ATtiny3224/3226/3227

29.5.2 MUX Control A

Bit 7 – INVERT Invert AC Output

Bits 4:3 – MUXPOS[1:0] Positive Input MUX Selection

Bits 1:0 – MUXNEG[1:0] Negative Input MUX Selection