18F8680 datasheet(183/496 Pages) MICROCHIP

Part #	18F8680

Description	64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module

PDF	496 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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183 / 496 page

 2004 Microchip Technology Inc.

DS30491C-page 181

PIC18F6585/8585/6680/8680

16.2.5

FULL-BRIDGE MODE

In Full-Bridge Output mode, four pins are used as

outputs; however, only two outputs are active at a time.

In the Forward mode, pin P1A is continuously active

and pin P1D is modulated. In the Reverse mode, pin

PGC is continuously active and pin P1B is modulated.

These are illustrated in Figure 16-7.

P1A, P1B, P1C and P1D outputs are multiplexed with

the PORTC<2>, PORTE<6:5> and PORTG<4> data

latches. The TRISC<2>, TRISC<6:5> and TRISG<4>

bits must be cleared to make the P1A, P1B, P1C and

P1D pins outputs.

FIGURE 16-7:

FULL-BRIDGE PWM OUTPUT

Period

Duty Cycle

P1A(2)

P1B(2)

P1C(2)

P1D(2)

Forward Mode

(1)

Period

Duty Cycle

P1A(2)

P1C(2)

P1D(2)

P1B(2)

Reverse Mode

(1)

Note 1: At this time, the TMR2 register is equal to the PR2 register.

Note 2: Output signal is shown as active-high.

18F8680 Datasheet(PDF) 183 Page - Microchip Technology