PIC16F688

Manufacturer Part NumberPIC16F688
ManufacturerMicrochip Technology Inc.
PIC16F688 datasheet
 
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Page 67/202:

ANALOG-TO-DIGITAL CONVERTER (ADC) MODULE

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8.0
ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
The
Analog-to-Digital
Converter
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
either V
or a voltage applied to the external reference
DD
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 8-1 shows the block diagram of the ADC.
FIGURE 8-1:
ADC BLOCK DIAGRAM
RA0/AN0
RA1/AN1/V
REF
RA2/AN2
RA4/AN3
RC0/AN4
RC1/AN5
RC2/AN6
RC3/AN7
© 2007 Microchip Technology Inc.
(ADC)
allows
V
DD
VCFG = 0
V
REF
VCFG = 1
000
001
A/D
010
GO/DONE
011
100
ADFM
101
110
ADON
111
V
SS
CHS
PIC16F688
10
0 = Left Justify
1 = Right Justify
10
ADRESH ADRESL
DS41203D-page 65