PIC18LF448T-I/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF448T-I/SP

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

Microchip Technology 

FIGURE 9-4:

RB7:RB4 PINS BLOCK

DIAGRAM

RBPU(2)

Data Bus

WR LATB

or

WR PORTB

Data Latch

DQ

CK

TRIS Latch

DQ

VDD

P

Weak

Pull-up

I/O pin(1)

WR TRISB

CK

RD TRISB

TTL

Input

Buffer

ST

Buffer

RD LATB

RD PORTB

Set RBIF

Latch

QD

EN

Q1

From other

RB7:RB4 pins

QD

EN

Q3

RBx/INTx

Note 1: I/O pins have diode protection to VDD and VSS.

2: To enable weak pull-ups, set the appropriate TRIS

bit(s) and clear the RBPU bit (INTCON2 register).

PIC18FXX8

FIGURE 9-5:

RBPU(2)

Data Bus

WR Port

RB1:RB0 PINS BLOCK

DIAGRAM

VDD

Data Latch

DQ

CK

P

Weak

Pull-up

I/O pin(1)

WR TRIS

TRIS Latch

DQ

CK

TTL

Input

Buffer

RD TRIS

QD

EN

RD Port

RBx/INTx

Schmitt Trigger

Buffer

Note 1: I/O pins have diode protection to VDD and VSS.

2: To enable weak pull-ups, set the appropriate TRIS

bit(s) and clear the RBPU bit (INTCON2 register).

© 2006 Microchip Technology Inc.

DS41159E-page 97

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