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ATmega 32
ATmega16/32 ADC Features
  • It is 10-bit ADC
  • Converted output binary data is held in two special functions 8-bit register ADCL (result Low) and ADCH (result in High).
  • ADC gives 10-bit output, so (ADCH: ADCL) only 10-bits are useful out of 16-bits.
  • We have options to use this 10-bits as upper bits or lower bits.
  • We also have three options for Vref. 1. AVcc (analog Vcc), 2. Internal 2.56 v3. External Aref. Pin.
  • The total conversion time depends on crystal frequency and ADPS0: 2 (frequency devisor)
  • If you decided to use AVcc or Vref pin as ADC voltage reference, you can make it more stable and increase the precision of ADC by connecting a capacitor between that pin and GND.
 

ATmega 32

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  • ATmega 32 ADC Features

    • It is 10-bit ADC
    • Converted output binary data is held in two special functions 8-bit register ADCL (result Low) and ADCH (result in High).
    • ADC gives 10-bit output, so (ADCH: ADCL) only 10-bits are useful out of 16-bits.
    • We have options to use this 10-bits as upper bits or lower bits.
    • We also have three options for Vref. 1. AVcc (analog Vcc), 2. Internal 2.56 v3. External Aref. Pin.
    • The total conversion time depends on crystal frequency and ADPS0: 2 (frequency devisor)
    • If you decided to use AVcc or Vref pin as ADC voltage reference, you can make it more stable and increase the precision of ADC by connecting a capacitor between that pin and GND.

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