Rainbow Electronics ATmega64M1 - Manual (Page 245)

245
8209A–AVR–08/09
ATmega16M1/32M1/64M1
22.10.2 Bit 4: 0 – MUX[4:0]: 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 22-5 .
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).
22.10.3 ADCSRA – ADC Control and Status Register A
• 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.
Table 22-5. ADC Input Channel Selection
MUX[4:0] Description
00000 ADC0
00001 ADC1
00010 ADC2
00011 ADC3
00100 ADC4
00101 ADC5
00110 ADC6
00111 ADC7
01000 ADC8
01001 ADC9
01010 ADC10
01011 Temp Sensor
01100 VCC/4
01101 ISRC
01110 AMP0
01111 AMP1 (- is ADC8, + is ADC9)
10000 AMP2 (- is ADC6)
10001 Bandgap
10010 GND
10011 Reserved
101xx Reserved
1xxxx Reserved
Bit 7 6 5 4 3 2 1 0
ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 ADCSRA
Read/Write R/W R/W R/W R R/W R/W R/W R/W
Initial Value 0 0 0 0 0 0 0 0