ATmega325PA Atmel Corporation, ATmega325PA Datasheet - Page 210

• Manufacturer Part Number: ATmega325PA
• Manufacturer: Atmel Corporation

22. AC - Analog Comparator
8285D–AVR–06/11
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P
The Analog Comparator compares the input values on the positive pin AIN0 and negative pin
AIN1. When the voltage on the positive pin AIN0 is higher than the voltage on the negative pin
AIN1, the Analog Comparator output, ACO, is set. The comparator’s output can be set to trigger
the Timer/Counter1 Input Capture function. In addition, the comparator can trigger a separate
interrupt, exclusive to the Analog Comparator. The user can select Interrupt triggering on com-
parator output rise, fall or toggle. A block diagram of the comparator and its surrounding logic is
shown in
The Power Reduction ADC bit, PRADC, in
be disabled by writing a logical zero to be able to use the ADC input MUX.
Figure 22-1. Analog Comparator Block Diagram
Notes:
ADC MULTIPLEXER
1. See
2. Refer to
Figure
REFERENCE
ACME
ADEN
BANDGAP
OUTPUT
placement.
Table 22-1 on page
(1)
22-1.
ACBG
Figure 1-1 on page 2
211.
and
Figure 14-5 on page 74
”PRR – Power Reduction Register” on page 45
(2)
for Analog Comparator pin
must
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