PIC16F685-ESLASHML datasheet(109/306 Pages) MICROCHIP

109 / 306 page

DS41262E-page 107

PIC16F631/677/685/687/689/690

9.0

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 9-1 shows the block diagram of the ADC.

FIGURE 9-1:

ADC BLOCK DIAGRAM

Note:

The ADC module applies to PIC16F677/

PIC16F685/PIC16F687/PIC16F689/

PIC16F690 devices only.

VDD

VREF

ADON

GO/DONE

VCFG = 1

VCFG = 0

CHS

VSS

RA0/AN0/C1IN+/ICSPDAT/ULPWU

RA1/AN1/C12IN0-/VREF/ICSPCLK

RA2/AN2/T0CKI/INT/C1OUT

RA4/AN3/T1G/OSC2/CLKOUT

RC0/AN4/C2IN+

RC1/AN5/C12IN1-

RC2/AN6/C12IN2-/P1D(1)

RC3/AN7/C12IN3-/P1C(1)

RC6/AN8/SS(2)

RC7/AN9/SDO(2)

RB4/AN10/SDI/SDA(2)

RB5/AN11/RX/DT(2)

CVREF

VP6 Reference

Note 1:

P1C and P1D available on PIC16F685/PIC16F690 only.

SS, SDO, SDA, RX and DT available on PIC16F677/PIC16F687/PIC16F689/PIC16F690 only.

ADC module applies to the PIC16F677/PIC16F685/PIC16F687/PIC16F689/PIC16F690 devices only.

ADRESH ADRESL

ADFM

= Left Justify

= Right Justify

ADC

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