29.5.2 MUX Control A

ACn.MUXCTRLA controls the analog comparator MUXes.

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


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 a ‘1’ to this bit enables inversion of the output of the AC. This effectively inverts the input to all the peripherals connected to the signal and affects the internal status signals.

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`	VREF	Voltage Reference
`0x3`	DAC	DAC output Instance n of the AC will use instance n of the DAC: for example, AC0 will use DAC0 and AC1 will use DAC1

ATtiny3216/3217

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