Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
ACME | ADTS [2:0] | ||||||
Access | R/W | R/W | R/W | R/W | |||
Reset | 0 | 0 | 0 | 0 |
Analog Comparator Multiplexer Enable
ADC Auto Trigger Source
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/Counter0 Compare Match A |
100 | Timer/Counter0 Overflow |
101 | Timer/Counter1 Compare Match B |
110 | Timer/Counter1 Overflow |
111 | Timer/Counter1 Capture Event |