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PIC16F946-E/MLQTP Datasheet(PDF) 177 Page - Microchip Technology

Part # PIC16F946-E/MLQTP
Description  28/40/44/64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology
PDF  330 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F946-E/MLQTP Datasheet(HTML) 177 Page - Microchip Technology

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© 2007 Microchip Technology Inc.
DS41250F-page 175
PIC16F913/914/916/917/946
12.0 ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
The
Analog-to-Digital
Converter
(ADC)
allows
conversion of an analog input signal to a 10-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 10-bit binary result via successive
approximation and stores the conversion result into the
ADC result registers (ADRESL and ADRESH).
The ADC voltage reference is software selectable to be
either internally generated or externally supplied.
The ADC can generate an interrupt upon completion of
a conversion. This interrupt can be used to wake-up the
device from Sleep.
Figure 12-1 shows the block diagram of the ADC.
FIGURE 12-1:
ADC BLOCK DIAGRAM
RA0/AN0
RA1/AN1
RA2/AN2
RA5/AN4
VDD
VREF+
ADON
GO/DONE
VCFG0 = 1
VCFG0 = 0
CHS
VSS
RE0/AN5(1)
RE1/AN6(1)
RE2/AN7(1)
RA3/AN3
VCFG1 = 1
VCFG1 = 0
VREF-
Note 1:
These channels are only available on PIC16F914/917 and PIC16F946 devices.
ADRESH ADRESL
10
10
ADFM
0
= Left Justify
1
= Right Justify
000
001
010
011
100
101
110
111
ADC



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