PIC18F2682-I/PT MICROCHIP [Microchip Technology], PIC18F2682-I/PT Datasheet - Page 183

• Manufacturer Part Number: PIC18F2682-I/PT
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 16-8:
FIGURE 16-9:
© 2007 Microchip Technology Inc.
Note 1:
External Switch C
External Switch D
Note 1:
P1A (Active-High)
P1B (Active-High)
P1C (Active-High)
P1D (Active-High)
2:
Shoot-Through
SIGNAL
2:
3:
The direction bit in the ECCP1 Control register (ECCP1CON<7>) is written any time during the PWM cycle.
When changing directions, the P1A and P1C signals switch before the end of the current PWM cycle at
intervals of 4 T
P1D signals are inactive at this time.
Current
Potential
All signals are shown as active-high.
t
t
ON
OFF
P1C
P1D
P1A
P1B
PWM DIRECTION CHANGE
PWM DIRECTION CHANGE AT NEAR 100% DUTY CYCLE
is the turn-on delay of power switch QC and its driver.
is the turn-off delay of power switch QD and its driver.
(1)
(1)
(1)
(1)
(1)
(1)
(1)
OSC
, 16 T
DC
OSC
or 64 T
Forward Period
PIC18F2682/2685/4682/4685
Period
OSC
DC
Preliminary
, depending on the Timer2 prescaler value. The modulated P1B and
(1)
t1
DC
(Note 2)
t
ON
t
t = t
(2)
OFF
Reverse Period
(3)
OFF
Period
DC
– t
ON
(2,3)
DS39761B-page 181