PIC18F258-ESLASHSOSQTP datasheet(141/402 Pages) MICROCHIP

部件名	PIC18F258-E/SOSQTP

功能描述	28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PDF	402 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

标志

141 / 402 page

DS41159E-page 139

PIC18FXX8

FIGURE 16-7:

PWM DIRECTION CHANGE

FIGURE 16-8:

PWM DIRECTION CHANGE AT NEAR 100% DUTY CYCLE

Period(1)

SIGNAL

Note

The direction bit in the ECCP1 Control Register (ECCP1CON.EPWM1M1) is written any time during the PWM

cycle.

2: The P1A and P1C signals switch at intervals of TOSC, 4 TOSC or 16 TOSC, depending on the Timer2 prescaler

value earlier when changing direction. The modulated P1B and P1D signals are inactive at this time.

Period

(2)

P1A (Active-High)

P1B (Active-High)

P1C (Active-High)

P1D (Active-High)

Forward Period

Reverse Period

(PWM)

P1A(1)

(PWM)

ton

(2)

toff

(3)

t = toff – ton

(2,3)

P1B(1)

P1C(1)

P1D(1)

External Switch D(1)

Potential

Shoot-Through

Current(1)

Note

1: All signals are shown as active-high.

2: ton is the turn-on delay of power switch and driver.

3: toff is the turn-off delay of power switch and driver.

External Switch C(1)

PIC18F258-E/SOSQTP 数据表(PDF) 141 Page - Microchip Technology

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