2.5.2 Internal ADC Reference Has Too Low Value
The internal ADC reference has a value lower than specified.
Work Around
- Use AVCC or external reference
- Measure the actual reference value by applying a known voltage to the ADC when using the internal reference. The result, when doing later conversions, can then be calibrated.
Affected Silicon Revisions
| ATmega2560/2561 | |||
|---|---|---|---|
| Rev. A | Rev. C | Rev. E | Rev. F |
| X | X | - | - |