ATXMEGA256A3B_09 ATMEL [ATMEL Corporation], ATXMEGA256A3B_09 Datasheet - Page 46

• Manufacturer Part Number: ATXMEGA256A3B_09
• Description: 8/16-bit XMEGA A3B Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

27. AC - Analog Comparator
27.1
27.2
8116F–AVR–09/09
Features
Overview
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XMEGA A3B features four Analog Comparators (AC). An Analog Comparator compares two
voltages, and the output indicates which input is largest. The Analog Comparator may be config-
ured to give interrupt requests and/or events upon several different combinations of input
change.
Both hysteresis and propagation delays may be adjusted in order to find the optimal operation
for each application.
A wide range of input selection is available, both external pins and several internal signals can
be used.
The Analog Comparators are always grouped in pairs (AC0 and AC1) on each analog port. They
have identical behavior but separate control registers.
Optionally, the state of the comparator is directly available on a pin.
PORTA and PORTB each have one AC pair. Notations are ACA and ACB, respectively.
Four Analog Comparators
Selectable Power vs. Speed
Selectable hysteresis
Analog Comparator output available on pin
Flexible Input Selection
Interrupt and event generation on
Window function interrupt and event generation on
– 0, 20 mV, 50 mV
– All pins on the port
– Output from the DAC
– Bandgap reference voltage.
– Voltage scaler that can perform a 64-level scaling of the internal VCC voltage.
– Rising edge
– Falling edge
– Toggle
– Signal above window
– Signal inside window
– Signal below window
XMEGA A3B
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