If no other interrupts occur before the ADC conversion completes, the ADC interrupt will wake up the CPU and execute the ADC Conversion Complete interrupt routine. The ADC will start a conversion once the CPU has been halted.ģ. Enter ADC Noise Reduction mode (or Idle mode). Single Conversion mode must be selected and the ADC conversion complete interrupt must be enabled.Ģ. Make sure that the ADC is enabled and is not busy converting. To make use of this feature, the following procedure should be used:ġ. The noise canceler can be used with ADC Noise Reduction and Idle mode. ADC Noise Canceler The ADC features a noise canceler that enables conversion during sleep mode to reduce noise induced from the CPU core and other I/O peripherals. If differential channels are used, the selected reference should not be closer to AVCC than indicated in Table 115 on page 259. Switching reference voltage source may be inaccurate, and the user is advised to discard this result.
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