NEC MPD784225 Series Manuel utilisateur

PD784225, 784225Y Subseries

16-/8-Bit Single-Chip Microcontrollers

Hardware

PD784224

PD784224Y

PD784225

PD784225Y

PD78F4225

PD78F4225Y

Document No. U12697EJ3V0UM00 (3rd edition)

Date Published April 2001 N CP(K)

1997, 2000

User’s Manual

Printed in Japan

User’s Manual

2User’s Manual U12697EJ3V0UM

[MEMO]

User’s Manual U12697EJ3V0UM

EEPROM and IEBus are trademarks of NEC Corporation.

Windows is either a registered trademark or trademark of Microsoft Corporation in the United States and/

or other countries.

PC/AT is a trademark of International Business Machines Corporation.

SPARCstation is a trademark of SPARC International, Inc.

Solaris and SunOS are trademarks of Sun Microsystems, Inc.

HP9000 series 700 and HP-UX are trademarks of Hewlett-Packard Company.

NEWS and NEWS-OS are trademarks of Sony Corporation.

Ethernet is a trademark of Xerox Corporation.

OSF/Motif is a trademark of the Open Software Founction, Inc.

TRON is the abbreviation for the Realtime Operating system Nucleus.

ITRON is the abbreviation for Industrial TRON.

NOTES FOR CMOS DEVICES

1 PRECAUTION AGAINST ESD FOR SEMICONDUCTORS

Note:

Strong electric field, when exposed to a MOS device, can cause destruction of the gate oxide and

ultimately degrade the device operation. Steps must be taken to stop generation of static electricity

as much as possible, and quickly dissipate it once, when it has occurred. Environmental control

must be adequate. When it is dry, humidifier should be used. It is recommended to avoid using

insulators that easily build static electricity. Semiconductor devices must be stored and transported

in an anti-static container, static shielding bag or conductive material. All test and measurement

tools including work bench and floor should be grounded. The operator should be grounded using

wrist strap. Semiconductor devices must not be touched with bare hands. Similar precautions

need to be taken for PW boards with semiconductor devices on it.

2 HANDLING OF UNUSED INPUT PINS FOR CMOS

Note:

No connection for CMOS device inputs can be cause of malfunction. If no connection is provided

to the input pins, it is possible that an internal input level may be generated due to noise, etc., hence

causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input

levels of CMOS devices must be fixed high or low by using a pull-up or pull-down circuitry. Each

unused pin should be connected to VDD or GND with a resistor, if it is considered to have a

possibility of being an output pin. All handling related to the unused pins must be judged device

by device and related specifications governing the devices.

3 STATUS BEFORE INITIALIZATION OF MOS DEVICES

Note:

Power-on does not necessarily define initial status of MOS device. Production process of MOS

does not define the initial operation status of the device. Immediately after the power source is

turned ON, the devices with reset function have not yet been initialized. Hence, power-on does

not guarantee out-pin levels, I/O settings or contents of registers. Device is not initialized until

the reset signal is received. Reset operation must be executed immediately after power-on for

devices having reset function.

4User’s Manual U12697EJ3V0UM

License not needed:

PD78F4225, 78F4225Y

The customer must judge the need for license:

PD784224, 784225, 784224Y, 784225Y

Purchase of NEWS I2C components conveys a license under the Philips I2C Patent Rights to use these components

in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.

The application circuits and their parameters are for reference only and are not intended for use in actual design-ins.

The export of these products from Japan is regulated by the Japanese government. The export of some or all of these

products may be prohibited without governmental license. To export or re-export some or all of these products from a

country other than Japan may also be prohibited without a license from that country. Please call an NEC sales

representative.

User’s Manual U12697EJ3V0UM

M8E 00. 4

The information in this document is current as of January, 2001. The information is subject to

change without notice. For actual design-in, refer to the latest publications of NEC's data sheets or

data books, etc., for the most up-to-date specifications of NEC semiconductor products. Not all

products and/or types are available in every country. Please check with an NEC sales representative

for availability and additional information.

No part of this document may be copied or reproduced in any form or by any means without prior

written consent of NEC. NEC assumes no responsibility for any errors that may appear in this document.

NEC does not assume any liability for infringement of patents, copyrights or other intellectual property rights of

third parties by or arising from the use of NEC semiconductor products listed in this document or any other

liability arising from the use of such products. No license, express, implied or otherwise, is granted under any

patents, copyrights or other intellectual property rights of NEC or others.

Descriptions of circuits, software and other related information in this document are provided for illustrative

purposes in semiconductor product operation and application examples. The incorporation of these

circuits, software and information in the design of customer's equipment shall be done under the full

responsibility of customer. NEC assumes no responsibility for any losses incurred by customers or third

parties arising from the use of these circuits, software and information.

While NEC endeavours to enhance the quality, reliability and safety of NEC semiconductor products, customers

agree and acknowledge that the possibility of defects thereof cannot be eliminated entirely. To minimize

risks of damage to property or injury (including death) to persons arising from defects in NEC

semiconductor products, customers must incorporate sufficient safety measures in their design, such as

redundancy, fire-containment, and anti-failure features.

NEC semiconductor products are classified into the following three quality grades:

"Standard", "Special" and "Specific". The "Specific" quality grade applies only to semiconductor products

developed based on a customer-designated "quality assurance program" for a specific application. The

recommended applications of a semiconductor product depend on its quality grade, as indicated below.

Customers must check the quality grade of each semiconductor product before using it in a particular

application.

"Standard": Computers, office equipment, communications equipment, test and measurement equipment, audio

and visual equipment, home electronic appliances, machine tools, personal electronic equipment

and industrial robots

"Special": Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster

systems, anti-crime systems, safety equipment and medical equipment (not specifically designed

for life support)

"Specific": Aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life

support systems and medical equipment for life support, etc.

The quality grade of NEC semiconductor products is "Standard" unless otherwise expressly specified in NEC's

data sheets or data books, etc. If customers wish to use NEC semiconductor products in applications not

intended by NEC, they must contact an NEC sales representative in advance to determine NEC's willingness

to support a given application.

(Note)

(1) "NEC" as used in this statement means NEC Corporation and also includes its majority-owned subsidiaries.

(2) "NEC semiconductor products" means any semiconductor product developed or manufactured by or for

NEC (as defined above).

•

6User’s Manual U12697EJ3V0UM

Regional Information

Some information contained in this document may vary from country to country. Before using any NEC

product in your application, pIease contact the NEC office in your country to obtain a list of authorized

representatives and distributors. They will verify:

• Device availability

• Ordering information

• Product release schedule

• Availability of related technical literature

• Development environment specifications (for example, specifications for third-party tools and

components, host computers, power plugs, AC supply voltages, and so forth)

• Network requirements

In addition, trademarks, registered trademarks, export restrictions, and other legal issues may also vary

from country to country.

NEC Electronics Inc. (U.S.)

Santa Clara, California

Tel: 408-588-6000

800-366-9782

Fax: 408-588-6130

800-729-9288

NEC Electronics (Germany) GmbH

Duesseldorf, Germany

Tel: 0211-65 03 02

Fax: 0211-65 03 490

NEC Electronics (UK) Ltd.

Milton Keynes, UK

Tel: 01908-691-133

Fax: 01908-670-290

NEC Electronics Italiana s.r.l.

Milano, Italy

Tel: 02-66 75 41

Fax: 02-66 75 42 99

NEC Electronics (Germany) GmbH

Benelux Office

Eindhoven, The Netherlands

Tel: 040-2445845

Fax: 040-2444580

NEC Electronics (France) S.A.

Velizy-Villacoublay, France

Tel: 01-3067-5800

Fax: 01-3067-5899

NEC Electronics (France) S.A.

Madrid Office

Madrid, Spain

Tel: 091-504-2787

Fax: 091-504-2860

NEC Electronics (Germany) GmbH

Scandinavia Office

Taeby, Sweden

Tel: 08-63 80 820

Fax: 08-63 80 388

NEC Electronics Hong Kong Ltd.

Hong Kong

Tel: 2886-9318

Fax: 2886-9022/9044

NEC Electronics Hong Kong Ltd.

Seoul Branch

Seoul, Korea

Tel: 02-528-0303

Fax: 02-528-4411

NEC Electronics Singapore Pte. Ltd.

Novena Square, Singapore

Tel: 253-8311

Fax: 250-3583

NEC Electronics Taiwan Ltd.

Taipei, Taiwan

Tel: 02-2719-2377

Fax: 02-2719-5951

NEC do Brasil S.A.

Electron Devices Division

Guarulhos-SP, Brasil

Tel: 11-6462-6810

Fax: 11-6462-6829

J01.2

User’s Manual U12697EJ3V0UM

Major Revisions in This Edition

Page Description

Throughout The following products have been developed.

•

PD78F4225GC-8BT, 78F4225GK-9EU, 78F4225YGC-8BT, 78F4225YGK-9EU

CHAPTER 8 16-BIT TIMER/EVENT COUNTER

p.174 •Addition of Caution related to operation in one-shot pulse output mode

CHAPTER 11 WATCH TIMER

p.223 •Change of watch timer interrupt interval from 0.5 second to “214/fWor 25/fW”

CHAPTER 18 I2C BUS MODE (

PD784225Y SUBSERIES ONLY)

p.340 •Modification of Figure 18-17 Communication Reservation Procedure

CHAPTER 23 LOCAL BUS INTERFACE FUNCTIONS

p.450 •Modification of Figure 23-8 Read Modify Write Timing for External Memory in External

Memory Expansion Mode

CHAPTER 27

PD78F4225 AND

PD78F4225Y PROGRAMMING

p.518 27.2 Flash Memory Overwriting

•Deletion of self overwrite mode

p.518 27.3 On-Board Overwrite Mode

•Deletion of dedicated flash programmer (Flashpro II)

p.519 •Modification of Table 27-3 Communication Modes

p.520 •Modification of Figure 27-2 Format of Communication Mode Selection

p.520 •Modification of Table 27-4 Major Functions of On-Board Overwrite Mode

•Deletion of batch erase, batch blank check, and batch verify

•Change of “block”to “area”

8User’s Manual U12697EJ3V0UM

INTRODUCTION

Target Readers This manual is intended for user engineers who wish to understand the functions of the

PD784225 and 784225Y Subseries and design its application systems.

Purpose This manual describes the hardware functions of the

PD784225 and 784225Y Subseries.

Organization The

PD784225 and 784225Y Subseries User’s Manual is divided into two parts: Hardware

(this manual) and Instruction.

Hardware Instruction

Pin functions CPU functions

Internal block functions Addressing

Interrupts Instruction set

Other on-chip peripheral functions

There are cautions associated with using this product.

Be sure to read the cautions in the text of each chapter and summarized at the end

of each chapter.

How to Read This Manual It is assumed that the readers of this manual have general knowledge about electrical

engineering, logic circuits, and microcontrollers.

•If there are no particular differences in the function

The

PD784225 in the

PD784225 Subseries is described as the representative mask

ROM version, and the

PD78F4225 is described as the representative flash memory

version.

•If there are differences in the function

Each product name is presented and described separately.

Since

PD784225 Subseries products are described as representative even this case,

for information on the operation of

PD784225Y Subseries products, read the sections

on the

PD784224Y, 784225Y, and 78F4225Y instead of the

PD784224, 784225, and

78F4225.

9User’s Manual U12697EJ3V0UM

•To understand the overall functions

→Read in the order of the contents.

•To debug when the operation is unusual

→Since the cautions are summarized at the end of each chapter, see the cautions

associated with the function.

• For detailed explanations of registers whose names are known

→See APPENDIX D REGISTER INDEX.

• For detailed explanations of the instruction functions

→Refer to the other manual 78K/IV Series User’s Manual Instruction (U10905E).

• For explanations of the application examples of the functions

→Refer to the Application Note.

Differences Between the

PD784225 Subseries and the

PD784225Y Subseries

The only functional difference between the

PD784225 Subseries and

PD784225Y

Subseries is the clocked serial interface. The two subseries share all other functions.

Caution

The clock serial interface is described in the following two chapters.

• CHAPTER 17 3-WIRE SERIAL I/O MODE

• CHAPTER 18 I2C BUS MODE (

PD784225Y SUBSERIES only)

For an overview of the serial interface, also read CHAPTER 15.

Conventions Data significance: Higher digits on the left and lower digits on the right

Active low representation: ××× (overscore over pin or signal name)

Note: Footnote for item marked with Note in the text

Caution: Information requiring particular attention

Remark: Supplementary information

Numerical representation: Binary ... ××××B or ××××

Decimal ... ××××

Hexadecimal ... ××××H

10 User’s Manual U12697EJ3V0UM

Never write a combination of codes that have “Setting prohibited” written in the

Characters that are confused: 0 (zero), O (capital o)

1 (one), l (letter l), I (capital i)

When writing

0×

3210

EDC 1 0 ×

Read the value that

conforms to the

operating state.

When reading

Write 0 or 1. The operation

is not affected by either

value.

Must write 0.

Must write 1.

Write the value for the

function be used.

Read 0 or 1.

Bits whose numbers are circled are reserved

words in NEC’s assembler or are defined as sfr

variables by the #pragma sfr directive in the C

compiler.

Ce manuel convient aux modèles suivants

Table des matières

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