PIC16F/LF1946/47
FIGURE 22-14:
PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PXRSEN = 0)
Missing Pulse
(Auto-Shutdown)
Missing Pulse
(CCPxASE not clear)
Timer
Overflow
Timer
Overflow
Timer
Overflow
Timer
Overflow
Timer
Overflow
PWM Period
PWM Activity
Start of
PWM Period
Shutdown Event
CCPxASE bit
PWM
Resumes
Shutdown
Event Occurs
Shutdown
Event Clears
CCPxASE
Cleared by
Firmware
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.
22.4.4
AUTO-RESTART MODE
The Enhanced PWM can be configured to automati-
cally 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.
FIGURE 22-15:
PWM AUTO-SHUTDOWN WITH AUTO-RESTART (PXRSEN = 1)
Missing Pulse
(Auto-Shutdown)
Missing Pulse
(CCPxASE not clear)
Timer
Overflow
Timer
Overflow
Timer
Overflow
Timer
Overflow
Timer
Overflow
PWM Period
PWM Activity
Start of
PWM Period
Shutdown Event
CCPxASE bit
PWM
Resumes
Shutdown
Event Occurs
Shutdown
Event Clears
CCPxASE
Cleared by
Hardware
DS41414A-page 224
Preliminary
2010 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
