PIC16F1946 Datasheet, PDF (226/440 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

PIC16F/LF1946/47
FIGURE 22-14:
PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PXRSEN = 0)
Timer
Overflow
Missing Pulse
(Auto-Shutdown)
Timer
Overflow
Timer
Overflow
Missing Pulse
(CCPxASE not clear)
Timer
Overflow
Timer
Overflow
PWM Activity
Shutdown Event
PWM Period
Start of
PWM Period
CCPxASE bit
Shutdown
Event Occurs
Shutdown
Event Clears
PWM
Resumes
CCPxASE
Cleared by
Firmware
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.
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.
FIGURE 22-15:
PWM AUTO-SHUTDOWN WITH AUTO-RESTART (PXRSEN = 1)
Timer
Overflow
Missing Pulse
(Auto-Shutdown)
Timer
Overflow
Timer
Overflow
Missing Pulse
(CCPxASE not clear)
Timer
Overflow
Timer
Overflow
PWM Activity
Shutdown Event
PWM Period
Start of
PWM Period
CCPxASE bit
Shutdown
Event Occurs
Shutdown
Event Clears
PWM
Resumes
CCPxASE
Cleared by
Hardware
DS41414A-page 224
Preliminary
 2010 Microchip Technology Inc.