Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
ADTS2 | ADTS1 | ADTS0 | |||||
Access | R/W | R/W | R/W | ||||
Reset | 0 | 0 | 0 |
ADC Auto Trigger Source [n = 2:0]
If ADATE in ADCSRA is written to one, the value of these bits selects which source will trigger an ADC conversion. If ADATE is cleared, the ADTS[2:0] settings will have no effect. A conversion will be triggered by the rising edge of the selected Interrupt Flag. Note that switching from a trigger source that is cleared to a trigger source that is set, will generate a positive edge on the trigger signal. If ADEN in ADCSRA is set, this will start a conversion. Switching to Free Running mode (ADTS[2:0]=0) will not cause a trigger event, even if the ADC Interrupt Flag is set.
ADTS[2:0] | Trigger Source |
---|---|
000 | Free Running mode |
001 | Analog Comparator |
010 | External Interrupt Request 0 |
011 | Timer/Counter 0 Compare Match A |
100 | Timer/Counter 0 Overflow |
101 | Timer/Counter 0 Compare Match B |
110 | Pin Change Interrupt 0 Request |
111 | Timer/Counter 0 Capture Event |