PIC18F45J50-I/SOSQTP 데이터 시트보기 (PDF) - Microchip Technology

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PIC18F45J50-I/SOSQTP

28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology

Microchip Technology 

PIC18F46J50 FAMILY

FIGURE 18-14: PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PxRSEN = 0)

Shutdown Event

PWM Period

ECCPxASE bit

PWM Activity

Start of

PWM Period

Normal PWM

Shutdown

Event Occurs

ECCPxASE

Shutdown Cleared by PWM

Event Clears Firmware Resumes

18.5.5 AUTO-RESTART MODE

The Enhanced PWM can be configured to automatically

restart the PWM signal once the auto-shutdown condi-

tion has been removed. Auto-restart is enabled by

setting the PxRSEN bit in the ECCPxDEL register.

If auto-restart is enabled, the ECCPxASE bit will

remain set as long as the auto-shutdown condition is

active. When the auto-shutdown condition is removed,

the ECCPxASE bit will be cleared via hardware and

normal operation will resume.

The module will wait until the next PWM period begins,

however, before re-enabling the output pin. This behav-

ior allows the auto-shutdown with auto-restart features

to be used in applications based on current mode PWM

control.

FIGURE 18-15: PWM AUTO-SHUTDOWN WITH AUTO-RESTART ENABLED (PxRSEN = 1)

Shutdown Event

PWM Period

ECCPxASE bit

PWM Activity

Start of

PWM Period

Normal PWM

Shutdown

Event Occurs

Shutdown

Event Clears

PWM

Resumes

DS39931D-page 262

 2011 Microchip Technology Inc.

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