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.
FIP, EEPROM, and IEBus are trademarks of NEC Corporation.
Windows and Windows NT are either registered trademarks or trademarks of Microsoft Corporation in the
United States and/or other countries.
PC/AT is a trademark of International Business Machines Corporation.
HP9000 Series 700 and HP-UX are trademarks of Hewlett-Packard Company.
SPARCstation is a trademark of SPARC International, Inc.
Solaris and SunOS are trademarks of Sun Microsystems, Inc.
Ethernet is a trademark of Xerox Corporation.
OSF/Motif is a trademark of OpenSoftware Foundation, Inc.
TRON stands for The Realtime Operating system Nucleus.
ITRON is an abbreviation of Industrial TRON.
User’s Manual U16035EJ2V0UD
3
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.
License not needed:
µ
PD78F0034BSGB-8ET, 78F0034BSGB(A)-8ET
The customer must judge the need for a license for the following products:
µ
PD780021ASGB-xxx-8ET, 780022ASGB-xxx-8ET, 780023ASGB-xxx-8ET, 780024ASGB-xxx-8ET,
µ
PD780031ASGB-xxx-8ET, 780032ASGB-xxx-8ET, 780033ASGB-xxx-8ET, 780034ASGB-xxx-8ET,
µ
PD780021ASGB(A)-xxx-8ET, 780022ASGB(A)-xxx-8ET, 780023ASGB(A)-xxx-8ET,
µ
PD780024ASGB(A)-xxx-8ET, 780031ASGB(A)-xxx-8ET, 780032ASGB(A)-xxx-8ET,
µ
PD780033ASGB(A)-xxx-8ET, 780034ASGB(A)-xxx-8ET
•
The information in this document is current as of June, 2002. 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).
M8E 00. 4
4
User’s Manual U16035EJ2V0UD
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
• 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
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 do Brasil S.A.
Electron Devices Division
Guarulhos-SP, Brasil
Tel: 11-6462-6810
Fax: 11-6462-6829
• Branch Sweden
Taeby, Sweden
Tel: 08-63 80 820
NEC Electronics (Europe) GmbH
Fax: 08-63 80 388
Duesseldorf, Germany
• United Kingdom Branch
Tel: 0211-65 03 01
Milton Keynes, UK
Fax: 0211-65 03 327
Tel: 01908-691-133
Fax: 01908-670-290
• 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
NEC Electronics Shanghai, Ltd.
Shanghai, P.R. China
Tel: 021-6841-1138
Fax: 021-6841-1137
NEC Electronics Taiwan Ltd.
Taipei, Taiwan
Tel: 02-2719-2377
Fax: 02-2719-5951
NEC Electronics Singapore Pte. Ltd.
Novena Square, Singapore
Tel: 253-8311
Fax: 250-3583
J02.4
User’s Manual U16035EJ2V0UD
5
Embedded System
京公网安备 11010802033920号
EEWORLD
