Microchip Technology MA160014 データシート
PIC18(L)F2X/4XK22
DS41412F-page 198
2010-2012 Microchip Technology Inc.
FIGURE 14-14:
PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PXRSEN = 0)
14.4.4
AUTO-RESTART MODE
The Enhanced PWM can be configured to
automatically restart the PWM signal once the auto-
shutdown condition has been removed. Auto-restart is
enabled by setting the PxRSEN bit in the PWMxCON
register.
automatically restart the PWM signal once the auto-
shutdown condition has been removed. Auto-restart is
enabled by setting the PxRSEN bit in the PWMxCON
register.
If auto-restart is enabled, the CCPxASE bit will remain
set as long as the auto-shutdown condition is active.
When the auto-shutdown condition is removed, the
CCPxASE bit will be cleared via hardware and normal
operation will resume.
set as long as the auto-shutdown condition is active.
When the auto-shutdown condition is removed, the
CCPxASE bit will be cleared via hardware and normal
operation will resume.
FIGURE 14-15:
PWM AUTO-SHUTDOWN WITH AUTO-RESTART (PXRSEN = 1)
Shutdown
PWM
CCPxASE bit
Activity
Event
Shutdown
Event Occurs
Shutdown
Event Clears
PWM
Resumes
Resumes
PWM Period
Start of
PWM Period
PWM Period
CCPxASE
Cleared by
Firmware
Timer
Overflow
Timer
Overflow
Timer
Overflow
Timer
Overflow
Missing Pulse
(Auto-Shutdown)
Missing Pulse
(CCPxASE not clear)
(CCPxASE not clear)
Timer
Overflow
Shutdown
PWM
CCPxASE bit
Activity
Event
Shutdown
Event Occurs
Shutdown
Event Clears
PWM Period
Start of
PWM Period
PWM Period
CCPxASE
Cleared by
Hardware
Timer
Overflow
Timer
Overflow
Timer
Overflow
Timer
Overflow
Missing Pulse
(Auto-Shutdown)
Missing Pulse
(CCPxASE not clear)
(CCPxASE not clear)
Timer
Overflow
PWM
Resumes
Resumes