Atmel ATmega128 User Manual

243
2467S–AVR–07/09
ATmega128
conversions. For a complete description of this bit, see “The ADC Data Register – ADCL and
ADCH” on page 245.
• Bits 4:0 – MUX4:0: Analog Channel and Gain Selection Bits
The value of these bits selects which combination of analog inputs are connected to the ADC.
These bits also select the gain for the differential channels. See Table 98 for details.
If these bits
are changed during a conversion, the change will not go in effect until this conversion is
complete (ADIF in ADCSRA is set).
Table 98. Input Channel and Gain Selections
MUX4..0
Single Ended
Input
Positive Differential
Input
Negative Differential
Input Gain
00000 ADC0
00001 ADC1
00010 ADC2
00011 ADC3 N/A
00100 ADC4
00101 ADC5
00110 ADC6
00111 ADC7
01000
(1)
ADC0 ADC0 10x
01001
ADC1 ADC0 10x
01010
(1)
ADC0 ADC0 200x
01011
ADC1 ADC0 200x
01100
ADC2 ADC2 10x
01101
ADC3 ADC2 10x
01110
ADC2 ADC2 200x
01111
ADC3 ADC2 200x
10000
ADC0 ADC1 1x
10001
ADC1 ADC1 1x
10010
N/A ADC2 ADC1 1x
10011
ADC3 ADC1 1x
10100
ADC4 ADC1 1x
10101
ADC5 ADC1 1x
10110
ADC6 ADC1 1x
10111
ADC7 ADC1 1x
11000
ADC0 ADC2 1x
11001
ADC1 ADC2 1x
11010
ADC2 ADC2 1x
11011
ADC3 ADC2 1x
11100
ADC4 ADC2 1x

Atmel ATmega128 Specifications

General

Brand	Atmel
Model	ATmega128
Category	Microcontrollers
Language	English