參數(shù)資料
型號(hào)： MB90F949PF
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁(yè)數(shù)： 38/65頁(yè)
文件大?。?/td> 713K
代理商： MB90F949PF
46
XMEGA C3 [DATASHEET]
8492F–AVR–07/2013
27.
AC – Analog Comparator
27.1
Features
Two Analog Comparators (AC)
Selectable hysteresis
No
Small
Large
Analog comparator output available on pin
Flexible input selection
All pins on the port
Bandgap reference voltage
A 64-level programmable voltage scaler of the internal V
CC voltage
Interrupt and event generation on:
Rising edge
Falling edge
Toggle
Window function interrupt and event generation on:
Signal above window
Signal inside window
Signal below window
Constant current source with configurable output pin selection
27.2
Overview
The analog comparator (AC) compares the voltage levels on two inputs and gives a digital output based on this
comparison. The analog comparator may be configured to generate interrupt requests and/or events upon several
different combinations of input change.
The analog comparator hysteresis can be adjusted in order to achieve the optimal operation for each application.
The input selection includes analog port pins, several internal signals, and a 64-level programmable voltage scaler. The
analog comparator output state can also be output on a pin for use by external devices.
A constant current source can be enabled and output on a selectable pin. This can be used to replace, for example,
external resistors used to charge capacitors in capacitive touch sensing applications.
The analog comparators are always grouped in pairs on each port. These are called analog comparator 0 (AC0) and
analog comparator 1 (AC1). They have identical behavior, but separate control registers. Used as pair, they can be set in
window mode to compare a signal to a voltage range instead of a voltage level.
PORTA has one AC pair. Notation is ACA .
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