18F8680 datasheet(131/496 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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131 / 496 page

 2004 Microchip Technology Inc.

DS30491C-page 129

PIC18F6585/8585/6680/8680

FIGURE 10-6:

BLOCK DIAGRAM OF RB2:RB0 PINS

FIGURE 10-7:

BLOCK DIAGRAM OF RB3 PIN

Data Latch

RBPU(2)

VDD

Data Bus

WR Port

WR TRIS

RD TRIS

RD Port

Weak

Pull-up

RD Port

INTx

I/O pin(1)

TTL

Input

Buffer

Schmitt Trigger

Buffer

TRIS Latch

Note 1:

I/O pins have diode protection to VDD and VSS.

To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (OPTION_REG<7>).

Data Latch

VDD

Data Bus

WR LATB or

WR TRISB

RD TRISB

RD PORTB

Weak

Pull-up

CCP2 or INT3

TTL

Input

Buffer

Schmitt Trigger

Buffer

TRIS Latch

RD LATB

WR PORTB

RBPU(2)

Enable(3)

CCP Output

RD PORTB

CCP Output(3)

VDD

VSS

I/O pin(1)

CCP2MX

CCP2MX = 0

Note 1:

I/O pin has diode protection to VDD and VSS.

To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (INTCON2<7>).

For PIC18FXX85 parts, the CCP2 input/output is multiplexed with RB3 if the CCP2MX bit is enabled (= 0) in the Configuration

18F8680 Datasheet(PDF) 131 Page - Microchip Technology

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