This document intended describe functional differences electrical spec

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PIC16F84 PIC16F84A Migration
This document intended describe functional differences electrical specification differences that present when migrating from device next. Table shows considerations that must taken into account when migrating from PIC16F84 PIC16F84A. Table shows electrical timing differences.
Even though compatible devices tested same electrical specifications, device characteristics different from each other (due process differences). These process differences should have effect systems that were designed well within device specifications. systems that operate close device specifications, process differences cause device behave differently.
Even though user made changes oscillator circuit, oscillator operation should verified ensure that starts performs expected. Adjusting loading capacitor values oscillator mode required.
TABLE
Module Oscillator Legend:
PIC16F84 PIC16F84A FUNCTIONAL DIFFERENCES
Differences from PIC16F84 PIC16F84 oscillator 10MHz. PIC16F84A oscillator 20MHz. Issues exist with regard application circuit. Issues exist with regard user program.
OSCILLATOR
PIC16F84A crystals MHz, resulting double execution speed. changes code, other than timing concerns, required. changes configuration word required. crystal loading capacitors need adjusted higher speed crystal, verifying oscillator operation same speed already recommended transition from PIC16F84 PIC16F84A.
1999 Microchip Technology Inc.
DS30072A-page
TABLE
Param Core
PIC16F84 PIC16F84A SPECIFICATION DIFFERENCES
PIC16F84 Symbol Characteristic PIC16F84A Units
FOSC D001 D001A D004A D010A TmcL SVDD
Eternal CLKIN Frequency mode) Oscillator Frequency mode) Supply Voltage (XT, modes) Supply Voltage mode) MCLR pulse width (low) rise rate ensure internal Poweron Reset signal (PWRT disabled) Supply current during FLASH programming (Fosc MHz, 5.5V) Supply Current mode (VDD 5.5V) PIC16F84 (FOSC MHz) PIC16F84A (FOSC MHz)
V/mS
D013
1.02 1.02
D021 D021A D022
Power down current (VDD 4.0V, disabled) Module Differential Current Watchdog Timer
Commercial Industrial Commercial Extended
IWDT
D040 D040A D041 D042 D043 D043A D050 VHYS
Input High Voltage Ports with buffer (4.5V<VDD<5.5V)1 (VDD Entire Range)1 with Schmitt Trigger MCLR, RA4/T0CKI OSC1 mode) OSC1 (XT, modes) OSC1 mode) Hysteresis Schmitt Trigger inputs
0.48VDD 0.45VDD 0.85VDD 0.7VDD
0.25VDD 0.8VDD 0.8VDD 0.7VDD 0.9VDD
EEPROM Data Memory D121 D122 VDRW TDEW read/write Erase/Write Cycle Time VMIN VMIN
FLASH Program Memory D131 D133 TDEW read Erase/Write Cycle Time VMIN VMIN
Data "Typ" column 25°C unless otherwise stated. These parameters design guidance only tested. Note user choose better specifications. This specification changed since last data sheet errata published 5/99.
DS30072A-Page
1999 Microchip Technology Inc.
NOTES:
DS30072A-Page
1999 Microchip Technology Inc.
WORLDWIDE SALES SERVICE
AMERICAS
Corporate Office
Microchip Technology Inc. 2355 West Chandler Blvd. Chandler, 85224-6199 Tel: 480-786-7200 Fax: 480-786-7277 Technical Support: 480-786-7627 Address: http://www.microchip.com
AMERICAS (continued)
Toronto
Microchip Technology Inc. 5925 Airport Road, Suite Mississauga, Ontario 1W1, Canada Tel: 905-405-6279 Fax: 905-405-6253
ASIA/PACIFIC (continued)
Singapore
Microchip Technology Singapore Ltd. Middle Road #07-02 Prime Centre Singapore 188980 Tel: 65-334-8870 Fax: 65-334-8850
ASIA/PACIFIC
Hong Kong
Microchip Asia Pacific Unit 2101, Tower Metroplaza Hing Fong Road Kwai Fong, N.T., Hong Kong Tel: 852-2-401-1200 Fax: 852-2-401-3431
Taiwan, R.O.C
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Atlanta
Microchip Technology Inc. Sugar Mill Road, Suite 200B Atlanta, 30350 Tel: 770-640-0034 Fax: 770-640-0307
Boston
Microchip Technology Inc. Mount Royal Avenue Marlborough, 01752 Tel: 508-480-9990 Fax: 508-480-8575
EUROPE
United Kingdom
Arizona Microchip Technology Ltd. Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 Tel: 5858 Fax: 44-118 921-5835
Beijing
Microchip Technology, Beijing Unit 915, Chaoyangmen Dajie Dong Erhuan Road, Dongcheng District China Hong Kong Manhattan Building Beijing 100027 Tel: 86-10-85282100 Fax: 86-10-85282104
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Japan
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France
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Dayton
Microchip Technology Inc. Prestige Place, Suite Miamisburg, 45342 Tel: 937-291-1654 Fax: 937-291-9175
Detroit
Microchip Technology Inc. Tri-Atria Office Building 32255 Northwestern Highway, Suite Farmington Hills, 48334 Tel: 248-538-2250 Fax: 248-538-2260
Korea
Microchip Technology Korea 168-1, Youngbo Bldg. Floor Samsung-Dong, Kangnam-Ku Seoul, Korea Tel: 82-2-554-7200 Fax: 82-2-558-5934
Germany
Arizona Microchip Technology GmbH Gustav-Heinemann-Ring D-81739 Germany Tel: 49-89-627-144 Fax: 49-89-627-144-44
Angeles
Microchip Technology Inc. 18201 Karman, Suite 1090 Irvine, 92612 Tel: 949-263-1888 Fax: 949-263-1338
Italy
Arizona Microchip Technology Centro Direzionale Colleoni Palazzo Taurus Colleoni 20041 Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883
11/15/99
Shanghai
Microchip Technology Shanghai Golden Bridge Bldg. 2077 Yan'an Road West, Hong Qiao District Shanghai, 200335 Tel: 86-21-6275-5700 Fax: 21-6275-5060
York
Microchip Technology Inc. Motor Parkway, Suite Hauppauge, 11788 Tel: 631-273-5305 Fax: 631-273-5335
Jose
Microchip Technology Inc. 2107 North First Street, Suite Jose, 95131 Tel: 408-436-7950 Fax: 408-436-7955
Microchip received QS-9000 quality system certification worldwide headquarters, design wafer fabrication facilities Chandler Tempe, Arizona July 1999. Company's quality system processes procedures QS-9000 compliant PICmicro® 8-bit MCUs, KEELOQ® code hopping devices, Serial EEPROMs microperipheral products. addition, Microchip's quality system design manufacture development systems 9001 certified.
rights reserved. 1999 Microchip Technology Incorporated. Printed USA. 11/99
Printed recycled paper.
Information contained this publication regarding device applications like intended suggestion only superseded updates. representation warranty given liability assumed Microchip Technology Incorporated with respect accuracy such information, infringement patents other intellectual property rights arising from such otherwise. Microchip's products critical components life support systems authorized except with express written approval Microchip. licenses conveyed, implicitly otherwise, under intellectual property rights. Microchip logo name registered trademarks Microchip Technology Inc. U.S.A. other countries. rights reserved. other trademarks mentioned herein property their respective companies.
1999 Microchip Technology Inc.

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