atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 243

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

18.9.2
7647A–AVR–02/08
ADC Control and Status Register A – ADCSRA
• Bit 4, 2, 1, 0 – MUX4, MUX3, MUX2, MUX1, MUX0: ADC Channel Selection Bits
These 4 bits determine which analog inputs are connected to the ADC input. The different set-
ting are shown in
Table 18-5.
If these bits are changed during a conversion, the change will not take effect until this conversion
is complete (it means while the ADIF bit in ADCSRA register is set).
Bit
Read/Write
Initial Value
• Bit 7 – ADEN: ADC Enable Bit
Set this bit to enable the ADC.
Clear this bit to disable the ADC.
Clearing this bit while a conversion is running will take effect at the end of the conversion.
MUX4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
MUX3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
1
ADC Input Channel Selection
ADEN
R/W
7
0
Table
MUX2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
x
18-5.
ADSC
R/W
6
0
MUX1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
x
x
ADATE
R/W
5
0
ADIF
MUX0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
x
x
R
4
0
ADIE
R/W
3
0
Description
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADC8
ADC9
ADC10
Temp Sensor
VCC/4
ISRC
AMP0
AMP1 (- is ADC8, + is ADC9)
AMP2 (- is ADC6)
Bandgap
GND
Reserved
Reserved
Reserved
ATmega32/64/M1/C1
ADPS2
R/W
2
0
ADPS1
R/W
1
0
ADPS0
R/W
0
0
ADCSRA
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