Rainbow Electronics ATmega128L - Manual (Page 234)

234
ATmega128(L)
2467B–09/01
regardless of any ongoing conversions. For a complete description of this bit, see “The
ADC Data Register – ADCL and ADCH” on page 236.
• 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 97 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 97. 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 ADC0 ADC0 10x
01001 ADC1 ADC0 10x
01010 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