PIC18F2680ISPSQTP datasheet(179/482 Pages) MICROCHIP

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Preliminary

DS39625C-page 177

PIC18F2585/2680/4585/4680

FIGURE 16-2:

PWM OUTPUT RELATIONSHIPS (ACTIVE-HIGH STATE)

FIGURE 16-3:

PWM OUTPUT RELATIONSHIPS (ACTIVE-LOW STATE)

Period

SIGNAL

PR2 + 1

ECCP1CON

<7:6>

P1A Modulated

P1B Modulated

P1A Active

P1B Inactive

P1C Inactive

P1D Modulated

P1A Inactive

P1B Modulated

P1C Active

P1D Inactive

Duty

Cycle

(Single Output)

(Half-Bridge)

(Full-Bridge,

Forward)

(Full-Bridge,

Reverse)

Delay(1)

Period

SIGNAL

PR2 + 1

ECCP1CON

<7:6>

P1A Modulated

P1B Modulated

P1A Active

P1B Inactive

P1C Inactive

P1D Modulated

P1A Inactive

P1B Modulated

P1C Active

P1D Inactive

Duty

Cycle

(Single Output)

(Half-Bridge)

(Full-Bridge,

Forward)

(Full-Bridge,

Reverse)

Delay(1)

Relationships:

• Period = 4 * TOSC * (PR2 + 1) * (TMR2 Prescale Value)

• Duty Cycle = TOSC * (ECCPR1L<7:0>:ECCP1CON<5:4>) * (TMR2 Prescale Value)

• Delay = 4 * TOSC * (ECCP1DEL<6:0>)

Note1: Dead-band delay is programmed using the ECCP1DEL register (Section 16.4.6 “Programmable Dead-Band Delay”).

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