PIC16F688-I/ST View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F688-I/ST

14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F688

FIGURE 7-5:

COMPARATOR I/O OPERATING MODES

Comparators Reset (POR Default Value)

CM<2:0> = 000

Two Independent Comparators

CM<2:0> = 100

C1IN- A

C1IN+ A

VIN-

VIN+ C1

Off(1)

C1IN- A

C1IN+ A

VIN-

VIN+ C1

C2IN- A

C2IN+ A

VIN-

VIN+ C2

Off(1)

C2IN- A

C2IN+ A

VIN-

VIN+ C2

Three Inputs Multiplexed to Two Comparators

CM<2:0> = 001

C1IN- A

C1IN+ A

CIS = 0 VIN-

CIS = 1 VIN+ C1

C1OUT

One Independent Comparator

CM<2:0> = 101

C1IN- I/O

C1IN+ I/O

VIN-

VIN+ C1

C1OUT

C2OUT

Off(1)

C2IN- A

C2IN+ A

VIN-

VIN+ C2

C2OUT

Four Inputs Multiplexed to Two Comparators

CM<2:0> = 010

C1IN- A

C1IN+ A

CIS = 0

CIS = 1

VIN-

VIN+ C1

C1OUT

C2IN- A

C2IN+ A

CIS = 0

CIS = 1

VIN-

VIN+ C2

C2OUT

From CVREF Module

Two Common Reference Comparators

CM<2:0> = 011

C1IN- A

C1IN+ I/O

VIN-

VIN+ C1

C1OUT

C2IN- A

C2IN+ A

VIN-

VIN+ C2

C2OUT

Two Common Reference Comparators with Outputs

CM<2:0> = 110

C1IN- A

VIN-

VIN+ C1

C1OUT

C1OUT(pin) D

C2IN- A

C2IN+ A

VIN-

VIN+ C2

C2OUT

C2OUT(pin) D

Comparators Off (Lowest Power)

CM<2:0> = 111

C1IN- I/O

C1IN+ I/O

VIN-

VIN+ C1

Off(1)

C2IN- A

C2IN+ A

VIN-

VIN+ C2

C2OUT

Legend: A = Analog Input, ports always reads ‘0’

I/O = Normal port I/O

Note 1: Reads as ‘0’, unless CxINV = 1.

C2IN- I/O

C2IN+ I/O

VIN-

VIN+ C2

Off(1)

CIS = Comparator Input Switch (CMCON0<3>)

D = Comparator Digital Output

© 2007 Microchip Technology Inc.

DS41203D-page 57

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