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User’s Manual
78K0S/KU1+
8-Bit Single-Chip Microcontrollers
μPD78F9200 μPD78F9201 μPD78F9202
μPD78F9500 μPD78F9501 μPD78F9502
Document No. U18172EJ3V0UD00 (3rd edition)
Date Published November 2009 NS
©
Printed in Japan
2006

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[MEMO]
2 User’s Manual U18172EJ3V0UD

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NOTES FOR CMOS DEVICES
(1) VOLTAGE APPLICATION WAVEFORM AT INPUT PIN: Waveform distortion due to input noise or a reflected
wave may cause malfunction. If the input of the CMOS device stays in the area between VIL (MAX) and VIH
(MIN) due to noise, etc., the device may malfunction. Take care to prevent chattering noise from entering the
device when the input level is fixed, and also in the transition period when the input level passes through the
area between VIL (MAX) and VIH (MIN).
(2) HANDLING OF UNUSED INPUT PINS: Unconnected CMOS device inputs can be cause of malfunction. If
an input pin is unconnected, it is possible that an internal input level may be generated due to noise, etc.,
causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input levels of CMOS
devices must be fixed high or low by using pull-up or pull-down circuitry. Each unused pin should be
connected to VDD or GND via a resistor if there is a possibility that it will be an output pin. All handling related
to unused pins must be judged separately for each device and according to related specifications governing
the device.
(3) PRECAUTION AGAINST ESD: A 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 when it has occurred. Environmental control
must be adequate. When it is dry, a humidifier should be used. It is recommended to avoid using insulators
that easily build up 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 benches
and floors should be grounded. The operator should be grounded using a wrist strap. Semiconductor devices
must not be touched with bare hands. Similar precautions need to be taken for PW boards with mounted
semiconductor devices.
(4) STATUS BEFORE INITIALIZATION: Power-on does not necessarily define the initial status of a MOS device.
Immediately after the power source is turned ON, devices with reset functions have not yet been initialized.
Hence, power-on does not guarantee output pin levels, I/O settings or contents of registers. A device is not
initialized until the reset signal is received. A reset operation must be executed immediately after power-on
for devices with reset functions.
(5) POWER ON/OFF SEQUENCE: In the case of a device that uses different power supplies for the internal
operation and external interface, as a rule, switch on the external power supply after switching on the internal
power supply. When switching the power supply off, as a rule, switch off the external power supply and then
the internal power supply. Use of the reverse power on/off sequences may result in the application of an
overvoltage to the internal elements of the device, causing malfunction and degradation of internal elements
due to the passage of an abnormal current. The correct power on/off sequence must be judged separately for
each device and according to related specifications governing the device.
(6) INPUT OF SIGNAL DURING POWER OFF STATE : Do not input signals or an I/O pull-up power supply while
the device is not powered. The current injection that results from input of such a signal or I/O pull-up power
supply may cause malfunction and the abnormal current that passes in the device at this time may cause
degradation of internal elements. Input of signals during the power off state must be judged separately for
each device and according to related specifications governing the device.
User’s Manual U18172EJ3V0UD
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Windows is a registered trademark or a trademark 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.
SuperFlash is a registered trademark of Silicon Storage Technology, Inc. in several countries including the
United States and Japan.
Caution: This product uses SuperFlash® technology licensed from Silicon Storage Technology, inc.
• The information in this document is current as of November, 2009. 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 Electronics 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 the 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 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 a customer's equipment shall be done under the full responsibility of the customer. NEC Electronics assumes no
responsibility for any losses incurred by customers or third parties arising from the use of these circuits, software and
information.
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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.
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"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 an 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
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equipment, home electronic appliances, machine tools, personal electronic equipment and industrial robots.
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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 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 an NEC Electronics sales representative in advance to determine NEC Electronics' willingness to support a
given application.
(Note 1) "NEC Electronics" as used in this statement means NEC Electronics Corporation and also includes its majority-owned
subsidiaries.
(Note 2) "NEC Electronics products" means any product developed or manufactured by or for NEC Electronics (as defined
above).
(M8E0909)
4 User’s Manual U18172EJ3V0UD

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INTRODUCTION
Target Readers
<R>
Purpose
Organization
This manual is intended for user engineers who wish to understand the functions of
the 78K0S/KU1+ in order to design and develop its application systems and
programs.
The target devices are the following subseries products.
78K0S/KU1+: μPD78F9200, 78F9201, 78F9202, 78F9500, 78F9501, 78F9502
This manual is intended to give users on understanding of the functions described in
the Organization below.
Two manuals are available for 78K0S/KU1+: this manual and the Instruction Manual
(common to the 78K/0S Series).
78K0S/KU1+
User’s Manual
Pin functions
Internal block functions
Interrupts
Other internal peripheral functions
Electrical specifications
78K/0S Series
Instructions
User’s Manual
CPU function
Instruction set
Instruction description
How to Use This Manual
It is assumed that the readers of this manual have general knowledge of electrical
engineering, logic circuits, and microcontrollers.
To understand the overall functions of 78K0S/KU1+
Read this manual in the order of the CONTENTS. The mark <R> shows major
revised points. The revised points can be easily searched by copying an “<R>”
in the PDF file and specifying it in the “Find what:” field.
How to read register formats
For a bit number enclosed in angle brackets (<>), the bit name is defined as a
reserved word in the RA78K0S, and is defined as an sfr variable using the
#pragma sfr directive in the CC78K0S.
To learn the detailed functions of a register whose register name is known
See APPENDIX B REGISTER INDEX.
To learn the details of the instruction functions of the 78K/0S Series
Refer to 78K/0S Series Instructions User’s Manual (U11047E) separately
available.
To learn the electrical specifications of the 78K0S/KU1+
See CHAPTER 19 ELECTRICAL SPECIFICATIONS.
User’s Manual U18172EJ3V0UD
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