Texas Instruments TMS370 Series Use and care manual

TMS370 Family
Application Board
Technical
Reference
1993 8-Bit Microcontroller Family

Printed in U.S.A., June 1993
2615131-9761 revision*SPNU029

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TMS370 Family
Application Board
Technical Reference
June 1993
SPNU029

IMPORTANT NOTICE
Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any
semiconductor product or service without notice, and advises its customers to obtain the latest
version of relevant information to verify, before placing orders, that the information being relied
on is current.
TIwarrantsperformanceofitssemiconductorproductsandrelatedsoftwaretothespecifications
applicableatthetimeofsaleinaccordancewithTI’sstandardwarranty.Testingandotherquality
control techniques are utilized to the extent TI deems necessary to support this warranty.
Specific testing of all parameters of each device is not necessarily performed, except those
mandated by government requirements.
Certain applications using semiconductor products may involve potential risks of death,
personal injury, or severe property or environmental damage (“Critical Applications”).
TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES
OR SYSTEMS OR OTHER CRITICAL APPLICATIONS.
Inclusion of TI products in such applications is understood to be fully at the risk of the customer.
UseofTI products in such applicationsrequiresthe written approval of anappropriateTI officer.
Questions concerning potential risk applications should be directed to TI through a local SC
sales office.
In order to minimize risks associated with the customer’s applications, adequate design and
operating safeguards should be provided by the customer to minimize inherent or procedural
hazards.
TI assumes no liability for applications assistance, customer product design, software
performance, or infringement of patents or services described herein. Nor does TI warrant or
representthatanylicense,eitherexpressorimplied,isgrantedunderanypatentright,copyright,
mask work right, or other intellectual property right of TI covering or relating to any combination,
machine, or process in which such semiconductor products or services might be or are used.
Copyright 1996, Texas Instruments Incorporated

IMPORTANT NOTICE
Texas Instruments Incorporated (TI) reserves the right to make changes to its products or to
discontinue any semiconductor product or service without notice, and advises its customers to
obtain the latest version of relevant information to verify, before placing orders, that the
information being relied on is current.
TI warrants performance of its semiconductor products and related software to current
specifications in accordance with TI’s standard warranty. Testing and other quality control
techniquesareutilizedtotheextentTIdeemsnecessarytosupportthiswarranty.Specifictesting
of all parameters of each device is not necessarily performed, except those mandated by
government requirements.
Please be aware that TI products are not intended for use in life-support appliances, devices,
or systems. Use of TI product in such applications requires the written approval of the
appropriate TI officer. Certain applications using semiconductor devices may involve potential
risks of personal injury, property damage, or loss of life. In order to minimize these risks,
adequate design and operating safeguards should be provided by the customer to minimize
inherentor procedural hazards. Inclusion of TI products in such applications is understood to be
fully at the risk of the customer using TI devices or systems.
TI assumes no liability for applications assistance, customer product design, software
performance, or infringement of patents or services described herein. Nor does TI warrant or
representthatanylicense,eitherexpressorimplied,isgrantedunderanypatentright,copyright,
mask work right, or other intellectual property right of TI covering or relating to any combination,
machine, or process in which such semiconductor products or services might be or are used.
WARNING
Thisequipmentisintendedforuse in a laboratory test environment only.Itgenerates,uses,and
can radiate radio frequency energy and has not been tested for compliance with the limits of
computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide
reasonableprotectionagainstradiofrequencyinterference.Operationofthisequipmentinother
environments may cause interference with radio communications, in which case the user at his
own expense will be required to take whatever measures may be required to correct this
interference.
Copyright 1993, Texas Instruments Incorporated

About This Manual
iii Read This First
Read This First
About This Manual
This manual describes the components of the TMS370 family application
board and contains the following chapters:
Chapter 1 Installing the Application Board and Invoking the Command Monitor.
Provides an overview and description of the functional blocks that compose
the TMS370 application board; tells you how to install the board and invoke
the command monitor.
Chapter 2 Master Operation. Discusses the functions of the master processor.
Chapter 3 Interfacing Between the Slave and the TMS370 Application Board.
Describes how the slave devices interface with the application board.
Chapter 4 Commands and Functions of the Command Monitor. Describes the
commands that you can use with the command monitor in TTY mode.
Appendix A Jumper and Switch Settings. Describes the location and function of each of
the jumpers and switches on the TMS370 application board.
Appendix B Using the TMS370 Assembly Language Tools With the Application
Board. Describes how the TMS370 assembler and code converter work with
the application board.
Appendix C Alphabetical Summary of Command-Monitor Messages. Describes
progress and error messages that the command monitor may display.
Appendix D Schematics. Contains schematics for the TMS370 family application board,
its spare gates, its power source, the master controller, the master/slave
buffer, the ’370Cx1x and ’370Cx5x slaves, the recreation ports, the protoarea
connections, and the PAL descriptions of the master and slave signals.
Appendix E Glossary. Defines acronyms and key terms used in this book.

Style and Symbol Conventions
iv
Style and Symbol Conventions
This document uses the following conventions.
- Program listings, program examples, interactive displays, filenames, and
symbol names are shown in a special typeface similar to a typewriter’s.
Examples use a bold version of the special typeface for emphasis;
interactive displays use a bold version of the special typeface to
distinguish commands that you enter from items that the system displays
(such as prompts, command output, error messages, etc.).
Here is a sample program listing:
.SECT ”TIUSE”,7FDEh ;specify a new memory section
.WORD 7FE0h ;Trap 0 vector
PUSH ST ;save status register
DINT ;stop all interrupts
BR 2000h ;goto master control interface
JMP $ ;used before WR and RR commands
RTI ;used before SS and RU commands
Here is an example of a system prompt and a command that you might
enter:
>LM 7000 700D 1 2 3 4
- In syntax descriptions, the instruction or command is in a bold face font,
and parameters are in
italics . Portions of a syntax that are in bold face
should be entered as shown; portions of a syntax that are in
italics
describe the kind of information that should be entered. Here is an
example of a command syntax:
DM
start [ stop ]
DM is the command. This command has two parameters, indicated by
start and stop .
- Square brackets ( [and ]) identify an optional parameter. If you use an
optional parameter, you specify the information within the brackets; you
don’t enter the brackets themselves. In the command syntax above,
stop
in an optional parameter.
- Braces( {and} )indicatealist.Thesymbol|(readas
or )separatesitems
within the list. Here’s an example of a list:
BL D {1|0}
Theregion andfill valueparametersfor theBL commandarenotoptional,
but you need to make a choice between 1 and 0.

Information About Cautions / Related Documentation From Texas Instruments
v Read This First
Information About Cautions
This is an example of a caution statement.
A caution statement describes a situation that could potentially
damage your software or equipment.
The information in a caution is provided for your protection. Please read each
caution carefully.
Related Documentation From Texas Instruments
The following books describe the TMS370 family devices and related support
tools. To obtain a copy of any of these TI documents, call the Texas
Instruments Literature Response Center at (800) 477–8924. When ordering,
please identify the book by its title and literature number.
TMS370 8-Bit Microcontroller Family Assembly Language Tools User’s
Guide
(literature number SPNU010) describes the assembly language
tools(assembler,linker,andothertoolsusedtodevelopassemblycode),
assembler directives, macros, common object file format, and symbolic
debugging directives for the ’370 family of devices.
TMS370 Family C Source Debugger User’s Guide (literature number
SPNU028) tells you how to invoke the TMS370 family application board
and XDS versions of the C source debugger interface. This book
discusses various aspects of the debugger interface, including window
management, command entry, code execution, data management, and
breakpoints, and includes a tutorial that introduces basic debugger
functionality.
TMS370 Family Data Manual (literature number SPNS014) describes the
TMS370familyof8-bitmicrocontrollerdevicesandcoverstopicssuchas
pin functions, architecture, internal register structure, stack operation,
instruction set, specifications, and operation of the TMS370 family
modules.

If You Need Assistance
vi
Trademarks
CROSSTALK is a trademark of Microstuf, Inc.
Kermit is a registered trademark of Columbia University.
MS-DOS is a registered trademark of Microsoft Corp.
PC-DOS is a trademark of International Business Machines Corp.
PROCOMM is a registered trademark of Datastorm Technologies Inc.
If You Need Assistance. . .
If you want to. .. Do this. . .
Request more information about
Texas Instruments
microcontroller products
Write to:
Texas Instruments Incorporated
Market Communications Manager, MS 736
P.O. Box 1443
Houston, Texas 77251–1443
Order Texas Instruments
documentation Call the TI Literature Response Center: (800) 477–8924
Ask questions about product
operation or report suspected
problems
Call the microcontroller hotline:
(713) 274–2370
FAX: [phone]
Reportmistakesinthisdocument
or any other TI documentation Send your comments to: Texas Instruments Incorporated
Technical Publications Manager, MS 702
P.O. Box 1443
Houston, Texas 77251–1443
FCC Warning
This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can radiate radio frequency energy and has not been
testedfor compliancewiththe limits ofcomputingdevices pursuanttosubpart
Jofpart15ofFCC rules,whicharedesignedtoprovidereasonableprotection
against radio frequency interference. Operation of this equipment in other
environments may cause interference with radio communications, in which
case the user at his own expense will be required to take whatever measures
may be required to correct this interference.

Contents
vii Contents
Contents
1 Installing the Application Board and Invoking the Command Monitor 1-1. . . . . . . . . . . . . . .
Provides an overview and description of the functional blocks that compose the TMS370 application board; tells
you how to install the board and invoke the command monitor.
1.1 Overview of the TMS370 Application Board 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of components 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating modes 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 What You’ll Need 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardware checklist 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software checklist 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental requirements 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Step 1: Preparing the Application Board for Installation 1-6. . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Step 2: Connecting the Cables 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to the host PC 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to the power supply 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Step 3: Setting Up the RS232-C Communications 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 Step 4: Applying Power 1-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Step 5: Invoking the Command Monitor 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Master Operation 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The master processor is responsible for communicating with the host, controlling all of the functions of the
applicationboard,andschedulingtasksfortheslave.Thischapterdiscussesthefunctionsofthemasterprocessor.
2.1 Functions of the Master Processor 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Executing the Command Monitor 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Changing the Operating Mode 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Communicating With the Host Through the RS232 Serial Port 2-5. . . . . . . . . . . . . . . . . . . .
2.5 Communicating With the Slave Through the Transceiver 2-7. . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Controlling the Slave Through Wait States 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Controlling Slave Programming 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Interfacing Between the Slave and the TMS370 Application Board 3-1. . . . . . . . . . . . . . . . . .
Describes how the slave devices interface with the application board.

Contents
viii
3.1 Slave Operation 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave-processor module operation 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command monitor operation and slave memory 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28-pin slave operations 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Microcomputer mode limitations of slave devices 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Interfacing With the Prototyping Area 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Interfacing With the TMS370 Modules 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Interfacing With I/O Ports 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Using Microprocessor Mode 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Protoarea Mode Control, Clock, Reset, and Wait Signals 3-13. . . . . . . . . . . . . . . . . . . . . . . .
Mode control pin—SMC 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CLKIN circuits 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slave reset circuits 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory wait interfacing 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7 Slave Memory Mapping 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External and internal memory areas 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8 Zero-Ohm Resistors 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.9 Interfacing With the Analog-to-Digital Conversion Module 3-21. . . . . . . . . . . . . . . . . . . . . . .
3.10 Programming Additional TMS370 Devices 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Commands and Functions of the Command Monitor 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Describes the commands that you can use with the command monitor in TTY mode.
4.1 Entering Commands From the Command Line 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering numerical parameters 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Escaping commands or long displays 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Modifying Displayed Values 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Prompts 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Protecting the EEPROM Memory 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 Using Run and Single-Step Commands 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 Using Software Breakpoints 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7 Functional Summary of Command-Monitor Commands 4-7. . . . . . . . . . . . . . . . . . . . . . . . . .
Modifying and displaying memory 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Modifying and displaying register data 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manipulating the processor state 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Managing breakpoints 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other TTY mode commands 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8 Alphabetical Summary of Command-Monitor Commands 4-9. . . . . . . . . . . . . . . . . . . . . . . .
A Jumper and Switch Settings A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Describes the location and function of each of the jumpers and switches on the TMS370 application board.
A.1 Overview of the Jumpers and Switches A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.2 Resetting the Application Board (SW1) A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.3 Setting the Operating Mode of the Master (SW2) A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting SW2.1 and SW2.2 A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting SW2.3 A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting SW2.4 A-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
ix Contents
A.4 Setting the Socket Memory (JP1) A-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.5 Selecting the EPROM Type for the Slave Memory (JP2) A-8. . . . . . . . . . . . . . . . . . . . . . . . .
A.6 Setting the Operating Mode of the Slave Device (JP3) A-10. . . . . . . . . . . . . . . . . . . . . . . . . .
A.7 Connecting the CLKIN Pin (JP4) A-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.8 Selecting the EPROM Type for the Master’s Monitor (JP5) A-11. . . . . . . . . . . . . . . . . . . . . .
B Using the TMS370 Assembly Language Tools With the Application Board B-1. . . . . . . . . . .
Describes how the TMS370 assembler and code converter work with the application board.
B.1 The Software Development Tools B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The assembler B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The code converter for TTY mode B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The starter program B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.2 Using the Assembler Without the Linker B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.3 Example Batch Files B-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Alphabetical Summary of Command-Monitor Messages C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Describes progress and error messages that the command monitor may display.
D Schematics D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contains schematics for the TMS370 family application board, its spare gates, its power source, the master
controller, the master/slave buffer, the ’370Cx1x and ’370Cx5x slaves, the recreation ports, the protoarea
connections, and the PAL descriptions of the master and slave signals.
E Glossary E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defines acronyms and key terms used in this book.

Figures
x
Figures
1–1 Application Board Block Diagram 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 Connecting the Power Supply to Connector P1 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 Slave-Master Communication 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 Wait-State Generator 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–1 Port Recreation 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 Mode Control Circuit 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 CLKIN Circuits 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–4 ’370Cx1x and ’370Cx5x Reset Circuits 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–5 The Wait Interface 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–6 ’370 Application Board Slave Memory Map 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–1 Program to Support Executing Commands 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–2 Stand-Alone Help Screen 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A–1 ’370 Application Board A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A–2 SW2 Switches A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A–3 JP1 Selections A-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A–4 JP2 Selections A-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A–5 Slave Memory Map and External Memory A-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A–6 JP3 Selections A-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B–1 Sections Directives B-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables
xi Contents
Tables
1–1 Temperature and Humidity Ranges 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 Switch and Jumper Settings for the TTY Mode 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–3 RS232 Cable and Pin Assignments for Connector P2 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–4 Application Board Power Supply Connector P1 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–5 Format for RS232-C Communications 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 Format for RS232 Communications 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 RS232 Pin Assignments on DB25 Connector P2 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 Master-to-Slave Communication 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–4 Slave-to-Master Communication 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–1 Memory Restrictions 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 Protoarea Connector (All Available Signals) 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 Module Output Signals on Protoarea Connector P4 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–4 Electrical Characteristics 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–5 Port Recreation on Protoarea Connector P5 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–6 Microprocessor Signals on Prototype Connector P3 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–7 Miscellaneous Signals on Protoarea Connectors 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–8 Switching Characteristics of 74ACT11008 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–9 Zero-Ohm Resistor Assignments 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–10 Interfacing Additional Programming Sockets 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–1 TMS370 Family Slave Devices 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–2 Test Command Parameters for T0 Command 4-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–3 Test Command Parameters for T1 Command 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A–1 Default Switch and Jumper Settings A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A–2 Switch Mode Selections for SW2 A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C–1 Device Addresses C-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xii

Running Title—Attribute Reference
1-1 Chapter Title—Attribute Reference
Installing the Application Board
and Invoking the Command Monitor
The ’370 family application board emulates ’370 microcontroller functions by
using ’370 microprocessors. This chapter provides an overview and descrip-
tion of the functional blocks that compose the TMS370 application board. In
addition, the chapter tells you how to install the ’370 application board and
invoke the command monitor.
Ifyou plan to install the application boardandusetheC source debugger, use
the installation instructions in the
TMS370 Family Application Board Installa-
tion Guide.
Topic Page
1.1 Overview of the TMS370 Application Board 1-2. . . . . . . . . . . . . . . . . . . . .
Summary of components 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating modes 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 What You’ll Need 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardware checklist 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software checklist 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental requirements 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Step 1: Preparing the Application Board for Installation 1-6. . . . . . . . . .
1.4 Step 2: Connecting the Cables 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to the host PC 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to the power supply 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Step 3: Setting Up the RS232-C Communications 1-9. . . . . . . . . . . . . . . .
1.6 Step 4: Applying Power 1-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Step 5: Invoking the Command Monitor 1-11. . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Overview of the TMS370 Application Board
1-2
1.1 Overview of the TMS370 Application Board
This section summarizes the major components of the application board and
describes the board’s operating modes.
Summary of components
The ’370 application board has these major components:
- A TMS370C250 master microprocessor that communicates with the
hostPCterminalviatheRS232-Cport,controlsalloftheapplicationboard
functions, and schedules tasks to be performed by the slave. Wait-state
generator and transceiver circuits enable both communication between
the master and slave and also program control. The master’s memory
space is completely separate from the slave’s memory.
- A16K-byteEPROM(27C128)dedicatedtothemasterforstoringthecom-
mand-monitor program (may be upgraded to 32K bytes).
- A separate TMS370C256 slave microprocessor that can function as an
independent microprocessor. The slave executes your code, self-pro-
gramsany internalmemorysuch asEEPROM,and hasitsown dedicated
memory space. This separate memory arrangement enables the slave to
run your programs without interference from the command monitor sys-
tem.
- 32K bytes of CMOS static RAM (62C256) for the slave to store and run
your programs.
- The transceiver (74HCT652) through which the master and slave com-
municate.
- The slave wait-state generator that allows the master to stop the slave
upon any external memory cycle. You can use the wait-state generator in
conjunction with the transceiver to read or write values directly on the
slave’s data bus.
- Port recreation logic thatrebuilds the ’370Cx5x slave’sportA,B,C, and
D functionality.
Other components of the application board include:
- A 28-pin PLCC socket and a 28-pin DIP socket for ’370Cx1x devices.
- Aprototypingareasurroundedbyallsignalsfromthe68-pinsocket,28-pin
sockets, VCC, and ground.

Overview of the TMS370 Application Board
1-3 Installing the Application Board and Invoking the Command Monitor
- RS232-C communications via MAX232 line driver and DB-25 connector.
- An adjustable 5-volt to 18-volt set-up power supply for write protect over-
ride (WPO) mode of slave devices.
- Programmable array logic unit (PAL) for master and slave memory deco-
ding.
- Power terminals for a 5-volt power supply.
Figure 1–1 shows how the board components interact.
Figure 1–1.Application Board Block Diagram
DB 25
Connector
P1
RS232-C
Interface
TMS370C250
Master
Controller
Master EPROM
16K to 32K Bytes
Switching
Power Supply
Off: 5 V
On: 8 V–18 V
Wait-State
Generator
Master/Slave
Transceiver
’370Cx1x Slave
28-pin PLCC
’370Cx1x Slave
28-pin DIP
’370Cx5x
Slave
68-pin PLCC
Slave Memory
RAM or ROM
8K to 32K Bytes
Port Recreation
Logic
Master
Slave
PAL
Memory
Decoder
Port A
Port B
Port C
Port D
Data
MC
WAIT
EDS
CS
Addr
CS
Stop
CS
EDSTEP
Data
CTRLS
Address
SELA SELB

Overview of the TMS370 Application Board
1-4
Operating modes
The ’370 application board allows you to operate in one of three modes:
- Debugging mode. The debugger mode is the standard TI programmer’s
interface. There are many advantages to using the debugger mode of
operation:
J Multilevel debugging
J Powerful command set
J Window-oriented interface
J Fully configurable, state-of-the-art, window-oriented interface
J Comprehensive data displays
J On-screen editing
J Patch assembly
The debugging mode is described in detail in the
TMS370 Family C
Source Debugger User’s Guide,
literature number SPNU028.
- TTY mode. The TTY mode allows you to communicate using an ASCII
serialprotocolwith equipmentsuchas“dumb”terminals, PCsrunningter-
minal interface programs (for example, CROSSTALK or PROCOMM), or
computers that are not IBM-compatible. This mode is most useful when
you don’t have access to an IBM-compatible computer or if you need to
doonlysimpleoperationsorprogramming.TheTTYmodealsohassever-
alcommandsthatallowyoutochecktheoperationofanapplicationboard.
Additionally, you can perform the following memoryoperations in the TTY
mode; these operations aren’t available in the debugging mode. You
execute these commands by using the command-monitor interface.
J Run system tests
J Find bytes
J Compare memory
J Block Program
J Directly read the analog pin
J Load on-chip EPROM from on-board EPROM
J Use a computer in “dumb” terminal mode
J Reverse assemble with cycle times
- Isolated mode. After you have written and debugged a program for a
slave, you can check the accuracy of that program by using the isolated
mode. This mode “turns off” all debugger software and allows the slave
device to run on its own.