PIC18F1220 View Datasheet(PDF) - Microchip Technology

Part Name

Description

MFG CO.

PIC18F1220

18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

Microchip Technology 

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PIC18F1220/1320

FIGURE 10-9:

BLOCK DIAGRAM OF RB2/P1B/INT2 PIN

RBPU(2)

P1B Enable

P1B Data

P1B/D Tri-State

1

Auto-Shutdown

0

Data Bus

WR LATB or

PORTB

WR TRISB

Data Latch

DQ

CK

TRIS Latch

DQ

CK

RD TRISB

RD LATB

RD PORTB

VDD

P

Weak

Pull-up

TTL

Input

Buffer

RB2 pin(1)

Q

D

EN

INT2 Input

Schmitt

Trigger

RD PORTB

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<7>).

DS39605F-page 92

© 2007 Microchip Technology Inc.

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