PIC18LF4331 datasheet(177/392 Pages) MICROCHIP

Part #	PIC18LF4331

Description	28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D

PDF	392 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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177 / 392 page

 2010 Microchip Technology Inc.

DS39616D-page 177

PIC18F2331/2431/4331/4431

FIGURE 18-4:

PWM TIME BASE BLOCK DIAGRAM

The PWM time base can be configured for four different

modes of operation:

• Free-Running mode

• Single-Shot mode

• Continuous Up/Down Count mode

• Continuous Up/Down Count mode with interrupts

for double updates

These four modes are selected by the PTMOD<1:0>

bits in the PTCON0 register. The Free-Running mode

produces

edge-aligned

PWM

generation.

The

Continuous

Up/Down

Count

modes

produce

center-aligned PWM generation. The Single-Shot

mode allows the PWM module to support pulse control

of certain Electronically Commutated Motors (ECMs)

and produces edge-aligned operation.

PTMR Register

PTPER

Comparator

PTPER Buffer

Comparator

Zero Match

Period Match

PTMOD1

Up/Down

Timer Reset

FOSC/4

Clock

Control

Period Load

Duty Cycle Load

PTMOD1

Period Match

Zero Match

PTMR Clock

Interrupt

Control

PTMOD1

Period Match

Zero Match

PTMOD0

PTEN

PTIF

PTDIR

PTMR Clock

Update Disable (UDIS)

Timer

Direction

Control

Postscaler

1:1-1:16

Prescaler

1:1, 1:4, 1:16, 1:64

PIC18LF4331 Datasheet(PDF) 177 Page - Microchip Technology

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