Datasheet

28.8.7. ADCSRB – ADC Control and Status Register B
Name: ADCSRB
Offset: 0x8E
Reset: 0x00
Property: –
Bit 7 6 5 4 3 2 1 0
ADTS2 ADTS1 ADTS0
Access
R/W R/W R/W
Reset 0 0 0
Bits 2:0 – ADTSn: 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 ADTS2:0 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.
Table 28-6 ADC Auto Trigger Source Selections
ADTS[2:0] Trigger Source
000 Free Running mode
001 Analog Comparator
010 External Interrupt Request 0
011 Timer/Counter0 Compare Match
100 Timer/Counter0 Overflow
101 Timer/Counter1 Compare Match B
110 Timer/Counter1 Overflow
111 Timer/Counter1 Capture Event
Atmel ATmega64A [DATASHEET]
Atmel-8160E-ATmega64A_Datasheet_Complete-09/2015
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