ATXMEGA64A1-CU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATXMEGA64A1-CU

8/16-bit XMEGA A1 Microcontroller

Atmel Corporation 

XMEGA A1

26.3 Input Selection

26.4

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

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

Upper limit of window

+

AC0

-

Input signal

+

AC1

Lower limit of window -

Interrupt

sensitivity

control

Interrupts

Events

46

8067L–AVR–08/10

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