PIC18LF2580IPTSQTP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF2580IPTSQTP

28/40/44-Pin Enhanced Flash Microcontrollers with ECAN™ Technology, 10-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC18F2480/2580/4480/4580

FIGURE 17-8:

PWM DIRECTION CHANGE

SIGNAL

Period(1)

Period

P1A (Active-High)

P1B (Active-High)

DC

P1C (Active-High)

P1D (Active-High)

(Note 2)

DC

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(1)

P1B(1)

P1C(1)

P1D(1)

DC

External Switch C(1)

External Switch D(1)

Potential

Shoot-Through

Current(1)

Note 1:

2:

3:

All signals are shown as active-high.

tON is the turn-on delay of power switch QC and its driver.

tOFF is the turn-off delay of power switch QD and its driver.

DC

tON(2)

tOFF(3)

t = tOFF – tON(2,3)

© 2009 Microchip Technology Inc.

DS39637D-page 185

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