NEC IE-784937-NS-EM1 User manual

User’s Manual
Target devices
µ
µµ
µ
PD784938A Subseries
IE-784937-NS-EM1
Emulation Board
Document No. U16556EJ1V0UM00 (1st edition)
Date Published May 2003 N CP(K)
Printed in Japan
2003

User’s Manual U16556EJ1V0UM
2
[MEMO]

User’s Manual U16556EJ1V0UM 3
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M8E 02. 11-1

User’s Manual U16556EJ1V0UM
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Regional Information
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Device availability
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Availability of related technical literature
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•
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User’s Manual U16556EJ1V0UM 5
INTRODUCTION
Product Overview The IE-784937-NS-EM1 is designed to be used with the IE-78K4-NS to debug the
following target devices that belong to the 78K/IV Series of 16-bit single-chip
microcontrollers.
• µ
PD784938A Subseries:
µ
PD784935A, 784936A, 784937A, 784938A, 78F4938A
Target Readers This manual is intended for engineers who will use the IE-784937-NS-EM1 with the IE-
78K4-NS to perform system debugging.
Engineers who use this manual are expected to be thoroughly familiar with the target
device’s functions and use methods and to be knowledgeable about debugging.
Organization When using the IE-784937-NS-EM1, refer to not only this manual (supplied with the IE-
784937-NS-EM1) but also the manual that is supplied with the IE-78K4-NS.
IE-78K4-NS IE-784937-NS-EM1
User’s Manual User’s Manual
•Basic specifications •General
•System configuration •Part names
•External interface functions •Installation
•Differences between target devices
and target interface circuits
•Restrictions
•Cautions
Purpose This manual’s purpose is to explain various debugging functions that can be performed
when using the IE-784937-NS-EM1.

User’s Manual U16556EJ1V0UM
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Terminology The meanings of certain terms used in this manual are listed below.
Term Meaning
Emulation device This is a general term that refers to the device in the emulator that is used to emulate the
target device. It includes the emulation CPU.
Emulation CPU This is the CPU block in the emulator that is used to execute user-generated programs.
Target device This is the device (a real chip) that is the target for emulation.
Target system This includes the target program and the hardware provided by the user. When defined
narrowly, it includes only the hardware.
IE system This refers to the combination of the IE-78K4-NS and the IE-784937-NS-EM1.
Conventions Data significance: Higher digits on the left and lower digits on the right
Note: Footnote for item marked with Note in the text
Caution: Information requiring particular attention
Remark: Supplementary information
Related Documents The related documents (user’s manuals) indicated in this publication may include
preliminary versions. However, preliminary versions are not marked as such.
Document Name Document No.
IE-78K4-NS In-Circuit Emulator U13356E
IE-784937-NS-EM1 Emulation Board This manual
ID78K Series Integrated Debugger Ver. 2.30 or Later WindowsTM Based Operation U15185E
µ
PD784938A Subseries Hardware U15609E
Caution The related documents listed above are subject to change without notice. Be sure to use the
latest version of each document for designing.

User’s Manual U16556EJ1V0UM 7
CONTENTS
CHAPTER 1 GENERAL..............................................................................................................................10
1.1 System Configuration................................................................................................................................ 11
1.2 Hardware Configuration ............................................................................................................................ 13
1.3 Basic Specifications .................................................................................................................................. 14
CHAPTER 2 PART NAMES .......................................................................................................................15
2.1 Parts of Main Unit ...................................................................................................................................... 16
CHAPTER 3 INSTALLATION.....................................................................................................................18
3.1 Connection ................................................................................................................................................. 19
3.2 Selection of Emulator Main Unit............................................................................................................... 20
3.3 Clock Settings ............................................................................................................................................ 20
3.3.1 Overview of clock settings ............................................................................................................. 20
3.3.2 Main system clock settings............................................................................................................ 22
3.3.3 Timer clock settings ....................................................................................................................... 26
3.4 Pin Mask Function Settings ...................................................................................................................... 29
3.4.1 NMI interrupt mask setting............................................................................................................. 29
3.4.2 Wait (WAIT)/hold (HOLD) mask function ....................................................................................... 29
3.4.3 Wait display function setting .......................................................................................................... 29
3.4.4 Hold display function setting.......................................................................................................... 30
3.5 Low-Voltage Emulation Setting ................................................................................................................ 30
3.6 External Trigger ......................................................................................................................................... 31
CHAPTER 4 DIFFERENCES BETWEEN TARGET DEVICES AND TARGET INTERFACE CIRCUITS..32
CHAPTER 5 RESTRICTIONS ....................................................................................................................36
CHAPTER 6 CAUTIONS ............................................................................................................................37
APPENDIX A EMULATION PROBE PIN ASSIGNMENT TABLE ............................................................. 38
APPENDIX B PROGRAM WAIT CONTROL REGISTER SETTINGS IN IN-CIRCUIT EMULATOR.........40
APPENDIX C NOTES ON TARGET SYSTEM DESIGN ............................................................................42

User’s Manual U16556EJ1V0UM
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LIST OF FIGURES
Figure No. Title Page
1-1 System Configuration .................................................................................................................................. 11
1-2 Basic Hardware Configuration..................................................................................................................... 13
2-1 IE-784937-NS-EM1 Part Names ................................................................................................................. 16
2-2 4937 PROBE Board Part Names ................................................................................................................ 17
3-1 Connection of Emulation Probe................................................................................................................... 19
3-2 External Circuits Used as System Clock Oscillator..................................................................................... 20
3-3 When Using Clock That Is Already Mounted on Emulation Board .............................................................. 21
3-4 When Using User-Mounted Clock ............................................................................................................... 21
3-5 When Using an External Clock.................................................................................................................... 22
3-6 Connections on Parts Board (When Using Main System Clock or User-Mounted Clock)........................... 23
3-7 Crystal Oscillator (When Using Main System Clock or User-Mounted Clock)............................................. 24
3-8 Pin Alignment of Crystal Oscillator and Socket........................................................................................... 25
3-9 Connections on Parts Board (When Using Timer Clock or User-Mounted Clock) ...................................... 27
3-10 Crystal Oscillator (When Using Timer Clock or User-Mounted Clock) ........................................................ 28
3-11 External Trigger Input Position .................................................................................................................... 31
4-1 Equivalent Circuit 1 of Emulation Circuit ..................................................................................................... 33
4-2 Equivalent Circuit 2 of Emulation Circuit ..................................................................................................... 34
4-3 Equivalent Circuit 3 of Emulation Circuit ..................................................................................................... 35
C-1 Distance Between IE System and Conversion Adapter .............................................................................. 42
C-2 Connection Conditions of Target System (When NP-100GF-TQ Is Used).................................................. 43
C-3 Connection Conditions of Target System (When NP-H100GF-TQ Is Used) ............................................... 43

User’s Manual U16556EJ1V0UM 9
LIST OF TABLES
Table No. Title Page
1-1 Correspondence Between Emulation Probes and Conversion Adapters.....................................................12
1-2 Basic Specifications .....................................................................................................................................14
3-1 Main System Clock Settings ........................................................................................................................22
3-2 Subsystem Clock Settings ...........................................................................................................................26
3-3 DIP Switch Setting for NMI Interrupt Mask...................................................................................................29
3-4 DIP Switch Setting for Wait (WAIT)/Hold (HOLD) Mask Function................................................................29
3-5 DIP Switch Setting for Wait Display Function ..............................................................................................29
3-6 DIP Switch Setting for Hold Display Function ..............................................................................................30
6-1 SW1 Setting When Using IE-784000-R .......................................................................................................37
6-2 SW1-7 Setting When Using IE-784000-R ....................................................................................................37
A-1 NP-100GF, NP-100GF-TQ, NP-H100GF-TQ Pin Assignments ...................................................................38
C-1 Distance Between IE System and Conversion Adapter ...............................................................................42

User’s Manual U16556EJ1V0UM
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CHAPTER 1 GENERAL
The IE-784937-NS-EM1 is a development tool for efficient debugging of hardware or software when using one of
the following target devices that belong to the 78K/IV Series of 16-bit single-chip microcontrollers.
This chapter describes the IE-784937-NS-EM1’s system configuration and basic specifications.
•Target devices
•
µ
PD784938A Subseries

CHAPTER 1 GENERAL
User’s Manual U16556EJ1V0UM 11
1.1 System Configuration
Figure 1-1 illustrates the IE-784937-NS-EM1’s system configuration.
Figure 1-1. System Configuration
FG Cable
IE-78K4-NS
(sold separately)
NS CARD
Cable
MC CARD
Cable
IE-70000-CD-IF-A
(sold separately)
Debugger
ID78K4-NS
(sold separately)
Device fileNote 1
(sold separately)
Control software
Host machine
PC-9800 Series
or IBM PC/AT™
or compatibles
Interface board
IE-70000-98-IF-C
(sold separately)
Interface board
IE-70000-PC-IF-C
(sold separately)
Interface board
IE-70000-PCI-IF(-A)
(sold separately)
or
Interface card
Interface
cable
Interface cable
(NS IF Cable)
In-circuit emulator
IE-784937-NS-EM1
(This product)
AC adapter
IE-70000-MC-PS-B
(sold separately)
Emulation probeNote 2
(sold separately)
Conversion socket/conversion adapterNote 3
(sold separately)

CHAPTER 1 GENERAL
User’s Manual U16556EJ1V0UM
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Notes 1. The device file is as follows.
µ
S××××DF784937:
µ
PD784938A Subseries
The device file can be downloaded from the website of NEC Electronics (http://www.necel.com/micro/).
2. The emulation probes NP-100GF, NP-100GF-TQ, and NP-H100GF-TQ are products of Naito Densei
Machida Mfg. Co., Ltd.
For further information, contact Naito Densei Machida Mfg. Co., Ltd. (TEL: [phone])
3. The conversion adapter TGF-100RBP is a product of TOKYO ELETECH CORPORATION.
For further information, contact Daimaru Kogyo Co., Ltd.
Tokyo Electronics Department (TEL: [phone])
Osaka Electronics Department (TEL: [phone])
Table 1-1 shows the correspondence between emulation probes and conversion adapters that are sold
separately.
Table 1-1. Correspondence Between Emulation Probes and Conversion Adapters
Package Emulation Probe Conversion Adapter
NP-100GF (Probe length: 200 mm) EV-9200GF-100100-pin plastic QFP
(GF-3BA type) NP-100GF-TQ (Probe length: 200 mm)
NP-H100GF-TQ (Probe length: 400 mm)
TGF-100RBP

CHAPTER 1 GENERAL
User’s Manual U16556EJ1V0UM 13
1.2 Hardware Configuration
Figure 1-2 shows the IE-784937-NS-EM1’s position in the basic hardware configuration.
Figure 1-2. Basic Hardware Configuration
IE-78K4-NS (sold separately) IE-784937-NS-EM1
Emulation probe
(sold separately)
Dedicated bus interface
IE system
Host machine Interface board
(sold separately)
78K4 main board
(G-78K4 MAIN Board)
78K4 emulation board
(G-78K4 EM Board)
Emulation board
(This product)
Interface card
(sold separately)

CHAPTER 1 GENERAL
User’s Manual U16556EJ1V0UM
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1.3 Basic Specifications
The IE-784937-NS-EM1’s basic specifications are listed in Table 1-1.
Table 1-2. Basic Specifications
Parameter Description
Target device
µ
PD784935A, 784936A, 784937A, 784938A, 78F4938A Subseries
System clock 12.58 MHz
Main system clock supply External: Input via an emulation probe from the target system
Internal: Mounted on emulation board (12.58 MHz), or mounted on the board by the user
Timer clock supply External: Input via an emulation probe from the target system
Internal: Mounted on emulation board (32.768 kHz), or mounted on the board by the user
Low-voltage support 2.7 to 5.5 V (at 6.29 MHz operation)
4.5 to 5.5 V (at 12.58 MHz operation)

User’s Manual U16556EJ1V0UM 15
CHAPTER 2 PART NAMES
This chapter introduces the parts of the IE-784937-NS-EM1 main unit.
The packing box contains the emulation board (IE-784937-NS-EM1), 4937 PROBE Board (GC), and 4937 PROBE
Board (GF).
If there are any missing or damaged items, please contact an NEC sales representative.
Fill out and return the guarantee document that comes with the main unit.

CHAPTER 2 PART NAMES
User’s Manual U16556EJ1V0UM
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2.1 Parts of Main Unit
Figure 2-1. IE-784937-NS-EM1 Part Names
GND
LowVolt
Probe connector
ACN1 100GF
EXTOUT
EXTIN
USER VDD
LED
TP3
JP3
USCLK
SW1
UMCLK
TP1
External sense
Probe connector
ACN2 (for expansion)
Connector for IE-784000-R
RCN3
TP2
TP1
HOLD LED3
WAIT LED2
IE-784937-NS-EM1

CHAPTER 2 PART NAMES
User’s Manual U16556EJ1V0UM 17
Figure 2-2. 4937 PROBE Board Part Names
(a) 4937 PROBE Board (GF) (b) 4937 PROBE Board (GC)
RCN3
ACN1
RCN3
ACN2
Caution The 4937 PROBE Board (GF) is used when the IE-784937-NS-EM1 and IE-78K4-R-EX3 are
combined to connect to the IE-784000-R. The 4937 PROBE Board (GF) is not used for
connection with the IE-78K4-NS, the 4937 PROBE Board (GC) is used for expansion.

User’s Manual U16556EJ1V0UM
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CHAPTER 3 INSTALLATION
This chapter describes methods for connecting the IE-784937-NS-EM1 to the IE-78K4-NS, emulation probe, etc.
Mode setting methods are also described.
Caution Connecting or removing components to or from the target system, or making switch or other
setting changes must be carried out after the power supply to both the IE system and the target
system has been switched OFF.

CHAPTER 3 INSTALLATION
User’s Manual U16556EJ1V0UM 19
3.1 Connection
(1) Connection with IE-78K4-NS main unit
See the IE-78K4-NS User’s Manual (U13356E) for a description of how to connect the IE-784937-NS-EM1 to the
IE-78K4-NS.
(2) Connection with emulation probe
See the IE-78K4-NS User’s Manual (U13356E) for a description of how to connect an emulation probe to the IE-
784937-NS-EM1.
Connect the emulation probe to ACN1 on this board.
Cautions 1. Incorrect connection may damage the IE system.
Be sure to read the emulation probe’s user’s manual for a detailed description of the
connection method.
2. Do not use ACN2, which is for expansion.
Figure 3-1. Connection of Emulation Probe
Emulation board
(IE-784937-NS-EM1)
Main board
(G-78K4 MAIN Board)
Emulation board
(G-78K4 EM Board)
Emulation probe
(sold separately)
ACN2 for expansion
ACN1 100GF
RCN3 for IE-784000-R
(3) Mounting 4937 PROBE Board
The 4937 PROBE Board need not be mounted when the IE-78K4-NS is used.
Mount the 4937 PROBE Board when using the IE-784000-R. Refer to CHAPTER 6 CAUTIONS.

CHAPTER 3 INSTALLATION
User’s Manual U16556EJ1V0UM
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3.2 Selection of Emulator Main Unit
JP3 in the IE-784937-NS-EM1 must be set in accordance with the emulator main unit to be used as follows.
Using IE-784937-NS-EM1 in combination with IE-78K4-NS: Short 1 and 2 (shipment setting)
Using IE-784000-R in combination with IE-784937-NS-EM1 and IE-78K4-R-EX3: Short 2 and 3
3.3 Clock Settings
3.3.1 Overview of clock settings
The main system clock to be used during debugging can be selected from (1) to (3) below, and the timer clock
from (1) and (2) below.
(1) Clock that is already mounted on emulation board
(2) Clock that is mounted by user
(3) External clock
If the target system includes an internal clock, select either “(1) Clock that is already mounted on emulation board”
or “(2) Clock that is mounted by user”. For an internal clock, the target device is connected to a resonator and the
target device’s internal oscillator is used. An example of the external circuit is shown in part (a) of Figure 3-2. During
emulation, the resonator that is mounted on the target system is not used. Instead, it uses the clock that is mounted
on the emulation board, which is installed for the IE-78K4-NS.
If the target system includes an external clock, select “(3) External clock”.
For an external clock, a clock signal is supplied from outside of the target device and the target device’s internal
oscillator is not used. An example of the external circuit is shown in part (b) of Figure 3-2.
Figure 3-2. External Circuits Used as System Clock Oscillator
(a) Internal clock (b) External clock
X2 or XT2 X2 or XT2
Target device Target device
External
clock
X1 or XT1 X1 or XT1