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 10-11: BLOCK DIAGRAM OF RB4/AN6/RX/DT/KBI0 PIN

EUSART Enabled

Analog Input Mode

DT TRIS

DT Data

Data Bus

WR LATB or

PORTB

WR TRISB

RBPU(2)

1

0

RD LATB

D

Q

CK Q

Data Latch

D

Q

CK Q

TRIS Latch

RD TRISB

Set RBIF

RD PORTB

Q

D

EN

From other

RB7:RB4 pins

To A/D Converter

QD

EN

RX/DT Input

RD PORTB

Q3

Schmitt

Trigger

Analog Input

Mode

VDD

P

Weak

Pull-up

TTL

Input

Buffer

Q1

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>).

RB4 pin

DS39605F-page 94

© 2007 Microchip Technology Inc.

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