Preliminary User’s Manual
µPD780828A Subseries
8-bit Single-Chip Microcontroller
µPD780824A
µPD780826A
µPD780828A
µPD78F0828A
Document No. U16504EE1V1UD00
Date Published January 2003
NEC Corporation 2003
Printed in Germany
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 V
DD
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.
2
User’s Manual U16504EE1V1UD00
•
The information in this document is current as of 28.01, 2003. The information is subject to change
without notice. For actual design-in, refer to the latest publications of NEC Electronics data sheets or
data books, etc., for the most up-to-date specifications of NEC Electronics 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 Electronics. NEC Electronics assumes no responsibility for any errors that
may appear in this document.
NEC Electronics 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 Electronics products
listed in this document or any other liability arising from the use of such NEC Electronics products.
No license, express, implied or otherwise, is granted under any patents, copyrights or other intellectual
property rights of NEC Electronics 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 Electronics no responsibility for any losses incurred by
customers or third parties arising from the use of these circuits, software and information.
While NEC Electronics endeavors to enhance the quality, reliability and safety of NEC Electronics
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 Electronics products, customers must incorporate sufficient safety measures in their
design, such as redundancy, fire-containment and anti-failure features.
NEC Electronics products are classified into the following three quality grades: “Standard”, “Special”
and “Specific”.
•
•
•
•
•
The "Specific" quality grade applies only to NEC Electronics products developed based on a customer-
designated “quality assurance program” for a specific application. The recommended applications of
NEC Electronics product depend on its quality grade, as indicated below. Customers must check the
quality grade of each NEC Electronics 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.
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).
Aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems,
life support systems and medical equipment for life support, etc.
"Special":
"Specific":
The quality grade of NEC Electronics products is “Standard” unless otherwise expressly specified in
NEC Electronics data sheets or data books, etc. If customers wish to use NEC Electronics products in
applications not intended by NEC Electronics, they must contact NEC Electronics sales representative
in advance to determine NEC Electronics 's willingness to support a given application.
Notes:
1.
2.
" NEC Electronics" as used in this statement means NEC Electronics Corporation and
also includes its majority-owned subsidiaries.
" NEC Electronics products" means any product developed or manufactured by or for
NEC Electronics (as defined above).
M8E 02.10
User’s Manual U16504EE1V1UD00
3
Regional Information
Some information contained in this document may vary from country to country. Before using any NEC
product in your application, please 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 (Europe) GmbH
Duesseldorf, Germany
Tel: 0211-65 03 01
Fax: 0211-65 03 327
Sucursal en España
Madrid, Spain
Tel: 091- 504 27 87
Fax: 091- 504 28 60
Succursale Française
Vélizy-Villacoublay, France
Tel: 01-30-67 58 00
Fax: 01-30-67 58 99
Filiale Italiana
Milano, Italy
Tel: 02-66 75 41
Fax: 02-66 75 42 99
Branch The Netherlands
Eindhoven, The Netherlands
Tel: 040-244 58 45
Fax: 040-244 45 80
Branch Sweden
Taeby, Sweden
Tel: 08-63 80 820
Fax: 08-63 80 388
United Kingdom Branch
Milton Keynes, UK
Tel: 01908-691-133
Fax: 01908-670-290
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.
Singapore
Tel: 65-6253-8311
Fax: 65-6250-3583
NEC Electronics Taiwan Ltd.
Taipei, Taiwan
Tel: 02-2719-2377
Fax: 02-2719-5951
NEC do Brasil S.A.
Electron Devices Division
Guarulhos, Brasil
Tel: 55-11-6465-6810
Fax: 55-11-6465-6829
4
User’s Manual U16504EE1V1UD00
Preface
Readers
This manual has been prepared for engineers who want to understand the
functions of the µPD780828A Subseries and design and develop its
application systems and programs.
µPD780828A Subseries:
µPD780824A(A), µPD780826A(A), µPD780828A(A), µPD78F0828A(A),
µPD780824A(A1), µPD780826A(A1), µPD780828A(A1),
µPD780824A(A2), µPD780826A(A2), µPD780828A(A2)
Purpose
This manual is intended for users to understand the functions of the
µPD780828A Subseries.
The µPD780828A subseries manual is separated into two parts: this manual
and the instruction edition (common to the 78K/0 series).
Organization
µPD780828A
Subseries
This Manual
78K/0 series
User’s Manual
Instruction
•
•
•
•
Pin functions
Internal block functions
Interrupt
Other on-chip peripheral functions
• CPU functions
• Instruction set
• Explanation of each instruction
How to Read This Manual
Before reading this manual, you should have general knowledge of electric
and logic circuits and microcontrollers.
• When you want to use this manual as the manual for (A) products, (A1) products,
and (A2) products:
→
Only the quality grade differs between (A), (A1) and (A2) products.
Read the part number as follows:
µPD780824A
→
µPD780824A(A), µPD780824A(A1), µPD780824A(A2)
µPD780826A
→
µPD780826A(A), µPD780826A(A1), µPD780826A(A2)
µPD780828A
→
µPD780828A(A), µPD780828A(A1), µPD780828A(A2)
µPD78F0828A
→
µPD78F0828A(A)
• When you want to understand the function in general:
→
Read this manual in the order of the contents.
• How to interpret the register format:
→
For the bit number enclosed in square, the bit name is defined as a reserved word in RA78K/0,
and in CC78K/0 and defined in the header file of hte IAR compiler.
• To make sure the details of the registers when you know the register name.
→
Refer to
Appendix C.
User’s Manual U16504EE1V1UD00
5
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