User’s Manual
µPD788001A,
788002A, 78F8002A
8-Bit Single-Chip Microcontroller
With LIN Transceiver & Power Supply
µPD788001A
µPD788002A
µPD78F8002A
Document No. U17742EJ3V0UD00 (3rd edition)
Date Published September 2006 NS CP(K)
2006
Printed in Japan
[MEMO]
2
User’s Manual U17742EJ3V0UD
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 V
IL
(MAX) and V
IH
(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 V
IL
(MAX) and
V
IH
(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 V
DD
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 U17742EJ3V0UD
3
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HP9000 series 700 and HP-UX are trademarks of Hewlett-Packard Company.
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Solaris and SunOS are trademarks of Sun Microsystems, Inc.
TRON stands for The Realtime Operating system Nucleus.
ITRON is an abbreviation of Industrial TRON.
These commodities, technology or software, must be exported in accordance
with the export administration regulations of the exporting country.
Diversion contrary to the law of that country is prohibited.
•
The information in this document is current as of September, 2006. The information is subject to
change without notice. For actual design-in, refer to the latest publications of NEC Electronics data
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representative for availability and additional information.
•
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•
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•
Descriptions of circuits, software and other related information in this document are provided for illustrative
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•
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•
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M8E 02. 11-1
4
User’s Manual U17742EJ3V0UD
INTRODUCTION
Readers
This manual is intended for user engineers who wish to understand the functions of the
µ
PD788001A, 78F8002A, 78F8002A, and to design and develop application systems
and programs for these devices.
Purpose
This manual is intended to give users an understanding of the functions described in the
Organization
below.
Organization
The
µ
PD788001A, 78F8002A, 78F8002A’s manuals are separated into three manuals:
this manual, 78K0/KB1 User’s Manual, and the Instructions edition (common to the
78K/0 microcontrollers).
µ
PD788001A, 78F8002A,
78F8002A
User’s Manual (This Manual)
•
Pin functions
•
Internal block functions
•
On-chip peripheral functions
•
Electrical specifications
78K0/KB1
User’s Manual
•
Pin functions
•
Internal block functions
•
Interrupts
•
Other on-chip peripheral functions
•
Electrical specifications
78K/0 Series
User’s Manual
Instructions
•
CPU functions
•
Instruction set
•
Explanation of each instruction
How to Read This Manual
It is assumed that the readers of this manual have general knowledge of electrical
engineering, logic circuits, and microcontrollers.
•
To gain a general understanding of functions:
→
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.
•
To know details of the microcontroller part:
→
Refer to the separate document
78K0/KB1 User’s Manual (U15836E).
The products corresponding to
the 78K0/KB1 products
78K0/KB1 products
µ
PD780101
µ
PD780102
µ
PD780103
µ
PD78F0103
−
µ
PD788001A
µ
PD788002A
µ
PD78F8002A
•
To know details of the 78K/0 microcontrollers instructions:
→
Refer to the separate document
78K/0 Series Instructions User’s Manual
(U12326E).
•
To know electrical specifications of the
µ
PD788001A(A1) and 788002A(A1):
→
Refer to the separate document
µ
PD788001A(A1), 788002A(A1) Data Sheet
(U18334E).
User’s Manual U17742EJ3V0UD
5
