PIC18F-LF1XK50 Datasheet, PDF (130/420 Pages) Microchip Technology – 20-Pin USB Flash Microcontrollers

PIC18F/LF1XK50
Note 1: The auto-shutdown condition is a
level-based signal, not an edge-based
signal. As long as the level is present, the
auto-shutdown will persist.
2: Writing to the ECCPASE bit is disabled
while an auto-shutdown condition
persists.
3: Once the auto-shutdown condition has
been removed and the PWM restarted
(either through firmware or auto-restart)
the PWM signal will always restart at the
beginning of the next PWM period.
4: Prior to an auto-shutdown event caused
by a comparator output or INT pin event,
a software shutdown can be triggered in
firmware by setting the CCPxASE bit to a
‘1’. The auto-restart feature tracks the
active status of a shutdown caused by a
comparator output or INT pin event only
so, if it is enabled at this time. It will imme-
diately clear this bit and restart the ECCP
module at the beginning of the next PWM
period.
FIGURE 14-12: PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PRSEN = 0)
Shutdown Event
PWM Period
ECCPASE bit
PWM Activity
Start of
PWM Period
Normal PWM
Shutdown
Event Occurs
ECCPASE
Cleared by
Shutdown Firmware PWM
Event Clears
Resumes
DS41350E-page 130
Preliminary
 2010 Microchip Technology Inc.