ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 276
ATMEGA2561V
Manufacturer Part Number
ATMEGA2561V
Description
8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATMEGA2561V.pdf
(449 pages)
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Analog Comparator
Multiplexed Input
276
ATmega640/1280/1281/2560/2561
It is possible to select any of the ADC15:0 pins to replace the negative input to the Ana-
log Comparator. The ADC multiplexer is used to select this input, and consequently, the
ADC must be switched off to utilize this feature. If the Analog Comparator Multiplexer
Enable bit (ACME in ADCSRB) is set and the ADC is switched off (ADEN in ADCSRA is
zero), MUX5 and MUX2:0 in ADMUX select the input pin to replace the negative input to
the Analog Comparator, as shown in Table 124. If ACME is cleared or ADEN is set,
AIN1 is applied to the negative input to the Analog Comparator.
Table 124. Analog Comparator Mulitiplexed Input
ACME
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
ADEN
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
x
MUX5
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
x
x
MUX2:0
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
xxx
xxx
AIN1
AIN1
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADC8
ADC9
ADC10
ADC11
ADC12
ADC13
ADC14
ADC15
Analog Comparator Negative Input
2549K–AVR–01/07
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