PIC16F753 datasheet(104/230 Pages) MICROCHIP

104 / 230 page

PIC16F753/HV753

DS40001709C-page 104

 2013-2015 Microchip Technology Inc.

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

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 12-1 shows the block diagram of the ADC.

FIGURE 12-1:

ADC BLOCK DIAGRAM

Note:

The ADRESL and ADRESH registers are

read-only.

AN0

A/D

AN1

AN2

VDD

VREF+

ADON

GO/DONE

ADPREF = 1

ADPREF = 0

CHS<3:0>

Vss

Dac output

Fixed Voltage Reference

AN3

ADRESH

ADRESL

ADFM

= Left Justify

= Right Justify

0000

0001

0010

0011

1110

1111

AN4

AN5

AN6

AN7

0100

0101

0110

0111

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