参数资料
型号: MCV18E-I/P
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PDIP18
封装: 0.300 INCH, LEAD FREE, PLASTIC, DIP-18
文件页数: 45/108页
文件大小: 1509K
代理商: MCV18E-I/P
2009 Microchip Technology Inc.
DS41399A-page 41
MCV18E
7.0
ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
The
Analog-to-Digital
Converter
(ADC)
allows
conversion of an analog input signal to a 8-bit binary
representation of that signal. This device uses analog
inputs, which are multiplexed into a single sample and
hold circuit. The output of the sample and hold is
connected to the input of the converter. The converter
generates
a
8-bit
binary
result
via
successive
approximation and stores the conversion result into the
ADC result register (ADRES).
The ADC voltage reference is software selectable to
either VDD or a voltage applied to the external reference
pins.
The ADC can generate an interrupt upon completion of
a conversion. This interrupt can be used to wake-up the
device from Sleep.
Figure 7-1 shows the block diagram of the ADC.
FIGURE 7-1:
ADC BLOCK DIAGRAM
RA0/AN0
RA1/AN1
RA2/AN2
VDD
VREF
ADON
GO/DONE
CHS
ADRES
8
VSS
RA3/VREF/AN3
000
001
010
011
PFCG<2:0>
(ADCON1 register)
ADC
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