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ATXMEGA64A1 Datasheet(PDF) 46 Page - ATMEL Corporation

Part # ATXMEGA64A1
Description  8/16-bit XMEGA A1 Microcontroller
PDF  99 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATXMEGA64A1 Datasheet(HTML) 46 Page - ATMEL Corporation

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8067I–AVR–04/09
XMEGA A1
26.3
Input Selection
The Analog comparators have a very flexible input selection and the two comparators grouped
in a pair may be used to realize a window function. One pair of analog comparators is shown in
Figure 26-1 on page 45.
• Input selection from pin
– Pin 0, 1, 2, 3, 4, 5, 6 selectable to positive input of analog comparator
– Pin 0, 1, 3, 5, 7 selectable to negative input of analog comparator
• Internal signals available on positive analog comparator inputs
– Output from 12-bit DAC
• Internal signals available on negative analog comparator inputs
– 64-level scaler of the VCC, available on negative analog comparator input
– Bandgap voltage reference
– Output from 12-bit DAC
26.4
Window Function
The window function is realized by connecting the external inputs of the two analog comparators
in a pair as shown in Figure 26-2.
Figure 26-2. Analog comparator window function
AC0
+
-
AC1
+
-
Input signal
Upper limit of window
Lower limit of window
Interrupt
sensitivity
control
Interrupts
Events



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