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PIC18F23K20-E/ML Datasheet(PDF) 184 Page - Microchip Technology

Part # PIC18F23K20-E/ML
Description  28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
PDF  456 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F23K20-E/ML Datasheet(HTML) 184 Page - Microchip Technology

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PIC18F2XK20/4XK20
DS41303G-page 184
 2010 Microchip Technology Inc.
FIGURE 16-10:
PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PRSEN = 0)
16.4.5
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 PRSEN bit in the PWM1CON register.
If auto-restart is enabled, the ECCPASE bit will remain
set as long as the auto-shutdown condition is active.
When the auto-shutdown condition is removed, the
ECCPASE bit will be cleared via hardware and normal
operation will resume.
FIGURE 16-11:
PWM AUTO-SHUTDOWN WITH AUTO-RESTART ENABLED (PRSEN = 1)
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.
Shutdown
PWM
ECCPASE bit
Activity
Event
Shutdown
Event Occurs
Shutdown
Event Clears
PWM
Resumes
Normal PWM
Start of
PWM Period
ECCPASE
Cleared by
Firmware
PWM Period
Shutdown
PWM
ECCPASE bit
Activity
Event
Shutdown
Event Occurs
Shutdown
Event Clears
PWM
Resumes
Normal PWM
Start of
PWM Period
PWM Period



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