PIC18F6X2X Datasheet, PDF (171/386 Pages) Microchip Technology – 64/80-Pin High Performance, 64-Kbyte Enhanced FLASH Microcontrollers with A/D

PIC18F6X2X/8X2X
FIGURE 17-8:
PWM DIRECTION CHANGE
SIGNAL
Period⁽¹⁾
Period
P1A (Active High)
P1B (Active High)
DC
P1C (Active High)
P1D (Active High)
DC
(Note 2)
Note 1: The direction bit in the CCP1 Control register (CCP1CON<7>) is written any time during the PWM cycle.
2: When changing directions, the P1A and P1C signals switch before the end of the current PWM cycle at intervals
of 4 TOSC, 16 TOSC or 64 TOSC, depending on the Timer2 prescaler value. The modulated P1B and P1D signals
are inactive at this time.
FIGURE 17-9:
PWM DIRECTION CHANGE AT NEAR 100% DUTY CYCLE
Forward Period
t1
Reverse Period
P1A
P1B
P1C
P1D
DC
External Switch C
External Switch D
Potential
Shoot-Through
Current
Note 1: All signals are shown as active high.
2: t_ON is the turn on delay of power switch QC and its driver.
3: t_OFF is the turn off delay of power switch QD and its driver.
DC
t_ON
t_OFF
t = t_OFF – t_ON
 2003 Microchip Technology Inc.
Advance Information
DS39612A-page 169