Changing ADC Control Bits During Free-Running Mode not Working

If control signals are changed during Free-Running mode, the new configuration is not properly taken into account in the next measurement. This is valid for the ADC.CTRLB, ADC.CTRLC, ADC.SAMPCTRL registers and the ADC.MUXPOS, ADC.WINLT and ADC.WINHT registers.

Work around

Disable ADC Free-Running mode before updating the ADC.CTRLB, ADC.CTRLC, ADC.SAMPCTRL, ADC.MUXPOS, ADC.WINLT or ADC.WINHT registers.

Affected Silicon Revisions

ATtiny1616
Rev. A            
X            
ATtiny3216
Rev. A Rev. B Rev. C          
* * -          
Parent topic: ADC - Analog-to-Digital Converter