National Instruments PC-TIO-10 User manual

© Copyright 1990, 1994 National Instruments Corporation.
All Rights Reserved.
PC-TIO-10
User Manual
Timing I/O Board for the PC
July 1993 Edition
Part Number 320292-01
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Limited Warranty
The PC-TIO-10 is warranted against defects in materials and workmanship for a period of one year from the date of
shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace
equipment that proves to be defective during the warranty period. This warranty includes parts and labor.
The media on which you receive National Instruments software are warranted not to fail to execute programming
instructions, due to defects in materials and workmanship, for a period of 90 days from date of shipment, as
evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace software
media that do not execute programming instructions if National Instruments receives notice of such defects during
the warranty period. National Instruments does not warrant that the operation of the software shall be uninterrupted
or error free.
A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the
outside of the package before any equipment will be accepted for warranty work. National Instruments will pay the
shipping costs of returning to the owner parts which are covered by warranty.
National Instruments believes that the information in this manual is accurate. The document has been carefully
reviewed for technical accuracy. In the event that technical or typographical errors exist, National Instruments
reserves the right to make changes to subsequent editions of this document without prior notice to holders of this
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© National Instruments Corporation v PC-TIO-10 User Manual
Preface
Introduction to the PC-TIO-10
This manual describes the mechanical and electrical aspects of the PC-TIO-10 and contains
information concerning its operation and programming. The PC-TIO-10 is a timing and digital
I/O interface for the PC. Two Advanced Micro Devices (AMD) Am9513A System Timing
Controllers (STCs) are used for the timing interface. With these chips, which feature many
different timing and counting modes, the PC-TIO-10 can perform a wide range of pulse
measurement and wave generation functions. A Motorola MC6821 Peripheral Interface Adapter
(PIA) is used for the digital I/O interface; each of the two 8-bit I/O ports is bit-configurable. In
addition, the PC-TIO-10 has two edge-sensitive interrupt inputs with programmable edge
selection. Any external transistor-transistor logic (TTL) signal, including any of the counter
outputs, can be connected to these interrupt inputs.
This manual describes installation, theory of operation, and basic programming considerations
for the PC-TIO-10. The example programs included are written in C and assembly language.
Organization of This Manual
This manual is divided into the following chapters and appendixes:
• Chapter 1, Introduction, describes the PC-TIO-10, lists the contents of your PC-TIO-10 kit,
lists the optional software and equipment for use with the PC-TIO-10, and explains how to
unpack the PC-TIO-10 kit.
• Chapter 2, Configuration and Installation, describes the PC-TIO-10 jumper configurations,
installation of the PC-TIO-10 board in your computer, signal connections to the PC-TIO-10
board, and cabling instructions.
• Chapter 3, Theory of Operation, explains the basic operation of the PC-TIO-10 circuitry.
• Chapter 4, Programming, describes in detail the address and function of each of the
PC-TIO-10 control and status registers. This chapter also includes important information
about programming the PC-TIO-10.
• Appendix A, Specifications, lists the specifications of the PC-TIO-10.
• Appendix B, I/O Connector, describes the pinout and signal names for the I/O connector on
the PC-TIO-10.
• Appendix C, AMD Am9513A Data Sheet,contains the manufacturer data sheet for the AMD
Am9513A integrated circuit. This circuit is used on the PC-TIO-10 board.
• Appendix D, Motorola MC6821 Data Sheet,contains the manufacturer data sheet for the
Motorola MC6821 integrated circuit. This circuit is used on the PC-TIO-10 board.
• Appendix E, Switch Settings, lists the possible switch settings, the corresponding base I/O
address, and the base I/O address space used for that setting.

Preface
PC-TIO-10 User Manual vi © National Instruments Corporation
• Appendix F, Customer Communication,contains forms for you to complete to facilitate
communication with National Instruments concerning our products.
• The Index alphabetically lists topics covered in this manual, including the page where the
topic can be found.
Conventions Used in This Manual
The following conventions are used throughout this manual:
italic Italic text denotes emphasis, a cross reference, or an introduction to a key
concept.
monospace Lowercase text in this font denotes text or characters that are to be literally
input from the keyboard, sections of code, programming examples, and
syntax examples. This font is also used for the proper names of disk
drives, paths, directories, programs, subprograms, subroutines, device
names, functions, variables, filenames, and extensions, and for statements
and comments taken from program code.
NI-DAQ NI-DAQ is used throughout this manual to refer to the NI-DAQ software
for DOS/Windows/LabWindows unless otherwise noted.
PC PC refers to the IBM PC/XT, the IBM PC AT, and compatible computers,
as well as EISA personal computers.
Abbreviations
The following metric system prefixes are used with abbreviations for units of measure:
Prefix Meaning Value
n- nano- 10-9
µ- micro- 10-6
m- milli- 10-3
k- kilo- 103
M- mega- 106
The following accepted abbreviations are used in this manual:
A amperes
C Celsius
°degrees
hex hexadecimal
Hz hertz

Preface
© National Instruments Corporation vii PC-TIO-10 User Manual
Abbreviations (continued)
in. inches
Iout ouput current
m meters
% percent
sec seconds
V volts
VEXT external volt
VIH volts, input high
VIL volts, input low
Vin volts in
Acronyms
The following acronyms are used in this manual:
AMD Advanced Micro Devices
AWG American Wire Gauge
BCD binary-coded decimal
DMA direct memory access
EISA Extended Industry Standard Architecture
FSK frequency shift keying
ISA Industry Standard Architecture
LSB least significant bit
MSB most significant bit
PIA Peripheral Interface Adapter
STC System Timing Controller
TTL transistor-transistor logic
VDC volts direct current
Related Documentation
The following documents contain information that you may find helpful as you read this manual:
•Am9513A/Am9513 System Timing Controller technical manual
•IBM Personal Computer XT Technical Reference manual

Preface
PC-TIO-10 User Manual viii © National Instruments Corporation
Customer Communication
National Instruments wants to receive your comments on our products and manuals. We are
interested in the applications you develop with our products, and we want to help if you have
problems with them. To make it easy for you to contact us, this manual contains comment and
configuration forms for you to complete. These forms are in Appendix B, Customer
Communication, at the end of this manual.

© National Instruments Corporation ix PC-TIO-10 User Manual
Contents
Chapter 1
Introduction ..........................................................................................................................1-1
What Your Kit Should Contain......................................................................................1-2
Optional Software ..........................................................................................................1-3
Optional Equipment .......................................................................................................1-3
Unpacking ......................................................................................................................1-4
Chapter 2
Configuration and Installation.......................................................................................2-1
Board Configuration ......................................................................................................2-1
Base I/O Address Settings..................................................................................2-2
Interrupt Level Selection....................................................................................2-4
Local Interrupt Selection....................................................................................2-5
Installation......................................................................................................................2-6
Signal Connections ........................................................................................................2-6
I/O Connector Pin Description...........................................................................2-6
Signal Connection Descriptions.........................................................................2-8
Timing Signal Connections................................................................................2-9
Digital I/O Signal Connections..........................................................................2-13
Power Connections ............................................................................................2-15
Cabling...........................................................................................................................2-15
Chapter 3
Theory of Operation ..........................................................................................................3-1
Data Transceivers...........................................................................................................3-2
PC I/O Channel Control Circuitry .................................................................................3-2
Am9513A System Timing Controller ...........................................................................3-2
MC6821 Peripheral Interface Adapter ..........................................................................3-2
Interrupt Control Circuitry.............................................................................................3-2
Timing and Digital I/O Connector.................................................................................3-3
Chapter 4
Programming........................................................................................................................4-1
Introduction....................................................................................................................4-1
Register Map..................................................................................................................4-2
Register Descriptions .....................................................................................................4-2
Register Descriptions for the Am9513A STCs..................................................4-3
Am9513A Data Registers ......................................................................4-4
Am9513A Command Registers .............................................................4-5
Am9513A Status Registers ....................................................................4-6
Register Descriptions for the MC6821 ..............................................................4-7
MC6821 Data Registers.........................................................................4-8
MC6821 Control Registers ....................................................................4-9
Programming Considerations for the Am9513A STCs .................................................4-10

Contents
PC-TIO-10 User Manual x © National Instruments Corporation
Programming Example for the Am9513A STCs ...........................................................4-10
Interrupt Programming Example for the MC6821.........................................................4-13
Appendix A
Specifications........................................................................................................................A-1
I/O Connector Electrical Specifications.........................................................................A-1
I/O Signal Ratings..............................................................................................A-1
Input Signal Specifications ................................................................................A-1
Output Signal Specifications..............................................................................A-1
Operating Environment..................................................................................................A-2
Storage Environment......................................................................................................A-2
Physical Specifications ..................................................................................................A-2
Power Requirement (from PC I/O Channel)..................................................................A-2
Appendix B
I/O Connector.......................................................................................................................B-1
Appendix C
AMD Am9513A Data Sheet.............................................................................................C-1
Appendix D
Motorola MC6821 Data Sheet........................................................................................D-1
Appendix E
Switch Settings.....................................................................................................................E-1
Appendix F
Customer Communication...............................................................................................F-1
Index ..............................................................................................................................Index-1
Figures
Figure 1-1. PC-TIO-10 Interface Board ...............................................................................1-1
Figure 2-1. PC-TIO-10 Parts Locator Diagram....................................................................2-2
Figure 2-2. Example Base I/O Address Switch Settings ......................................................2-3
Figure 2-3. Interrupt Jumper Setting for IRQ5 (Factory Setting).........................................2-4
Figure 2-4. Interrupt Jumper Setting for Disabling Interrupts..............................................2-5
Figure 2-5. Local Interrupt Jumper Setting (Factory Setting) ..............................................2-5
Figure 2-6. PC-TIO-10 I/O Connector Pin Assignments .....................................................2-7
Figure 2-7. Event-Counting Application with External Switch Gating................................2-10
Figure 2-8. Frequency Measurement Application ................................................................2-11
Figure 2-9. Timing Signal Relationships..............................................................................2-12
Figure 2-10. Digital I/O Connections .....................................................................................2-14
Figure 3-1. PC-TIO-10 Block Diagram................................................................................3-1
Figure B-1. PC-TIO-10 I/O Connector .................................................................................B-1

Contents
© National Instruments Corporation xi PC-TIO-10 User Manual
Tables
Table 2-1. PC-TIO-10 Factory-Set Switch and Jumper Settings ........................................2-1
Table 2-2. Default Settings of National Instruments Products for the PC ..........................2-4
Table 4-1. PC-TIO-10 Address Map...................................................................................4-2
Table E-1. Switch Settings with Corresponding Base I/O Address and Base I/O
Address Space....................................................................................................E-1

© National Instruments Corporation 1-1 PC-TIO-10 User Manual
Chapter 1
Introduction
This chapter describes the PC-TIO-10, lists the contents of your PC-TIO-10 kit, lists the optional
software and equipment for use with the PC-TIO-10, and explains how to unpack the PC-TIO-10
kit.
The PC-TIO-10 is a timing and digital I/O interface for the PC. Two AMD Am9513A STCs are
used for the timing interface. With these chips, which feature many different timing and
counting modes, the PC-TIO-10 can perform of a wide range of pulse measurement and wave
generation functions. A Motorola MC6821 PIA is used for the digital I/O interface; each of the
two 8-bit I/O ports is bit-configurable. In addition, the PC-TIO-10 has two edge-sensitive
interrupt inputs with programmable edge selection. Any external TTL signal, including any of
the counter outputs, can be connected to these interrupt inputs.
Figure 1-1 shows the PC-TIO-10 interface board.
Figure 1-1. PC-TIO-10 Interface Board

Introduction Chapter 1
PC-TIO-10 User Manual 1-2 © National Instruments Corporation
The timing circuits on the board make the PC-TIO-10 useful for the following operations:
• Wave and pulse generation
• Frequency shift keying (FSK)
• Pulse-width measurement
• Time-of-day counting and alarm generation
• Event counting
The digital I/O lines on the PC-TIO-10 interface the PC to the following:
• BCD-compatible panel meters and test equipment
• Opto-isolated, solid-state relays and I/O module mounting racks
The PC-TIO-10 turns the PC into a timing and digital I/O system controller for applications in
laboratory testing, production testing, and industrial process monitoring and control.
What Your Kit Should Contain
The contents of the PC-TIO-10 kit (part number 776452-01) are listed as follows.
Kit Component Part Number
PC-TIO-10 board
PC-TIO-10 User Manual
NI-DAQ software for DOS/Windows/LabWindows, with manuals
NI-DAQ Software Reference Manual for DOS/Windows/LabWindows
NI-DAQ Function Reference Manual for DOS/Windows/LabWindows
181195-01
320292-01
776250-01
320498-01
320499-01
If your kit is missing any of the components, contact National Instruments.
Your PC-TIO-10 is shipped with the NI-DAQ software for DOS/Windows/LabWindows.
NI-DAQ has a library of functions that can be called from your application programming
environment. These functions include routines for analog input (A/D conversion), buffered data
acquisition (high-speed A/D conversion), analog output (D/A conversion), waveform generation,
digital I/O, counter/timer, SCXI, RTSI, and self-calibration. NI-DAQ maintains a consistent
software interface among its different versions so you can switch between platforms with
minimal modifications to your code. NI-DAQ comes with language interfaces for Professional
BASIC, Turbo Pascal, Turbo C, Turbo C++, Borland C++, and Microsoft C for DOS; and Visual
Basic, Turbo Pascal, Microsoft C with SDK, and Borland C++ for Windows. NI-DAQ software
is on high-density 5.25 in. and 3.5 in. diskettes.

Chapter 1 Introduction
© National Instruments Corporation 1-3 PC-TIO-10 User Manual
Optional Software
This manual contains complete instructions for directly programming the PC-TIO-10. Normally,
however, you should not need to read the low-level programming details in the user manual
because the NI-DAQ software package for controlling the PC-TIO-10 is included with the board.
Using NI-DAQ is quicker and easier than and as flexible as using the low-level programming
described in Chapter 4, Programming.
You can use the PC-TIO-10 with LabVIEW for Windows or LabWindows for DOS. LabVIEW
and LabWindows are innovative program development software packages for data acquisition
and control applications. LabVIEW uses graphical programming, whereas LabWindows
enhances Microsoft C and QuickBASIC. Both packages include extensive libraries for data
acquisition, instrument control, data analysis, and graphical data presentation.
Part numbers for these software packages are listed in the following table.
Software Part Number
LabVIEW for Windows
LabWindows
Standard package
Advanced Analysis Library
Standard package with the Advanced Analysis Library
776670-01
776473-01
776474-01
776475-01
Optional Equipment
Equipment Part Number
CB-50 I/O connector block – 0.5 m cable 776164-01
CB-50 I/O connector block – 1.0 m cable 776164-02
Standard ribbon cable – 0.5 m 180524-05
Standard ribbon cable – 1.0 m 180524-10
Shielded ribbon cable – 0.5 m 180554-05
Shielded ribbon cable – 1.0 m 180554-10
Refer to the Cabling section in Chapter 2 for additional information on cabling and connectors.

Introduction Chapter 1
PC-TIO-10 User Manual 1-4 © National Instruments Corporation
Unpacking
Your PC-TIO-10 board is shipped in an antistatic package to prevent electrostatic damage to the
board. Several components on the board can be damaged by electrostatic discharge. To avoid
such damage in handling the board, take the following precautions:
• Touch the antistatic package to a metal part of your computer chassis before removing the
board from the package.
• Remove the board from the package and inspect the board for loose components or any other
sign of damage. Notify National Instruments if the board appears damaged in any way. Do
not install a damaged board into your computer.

© National Instruments Corporation 2-1 PC-TIO-10 User Manual
Chapter 2
Configuration and Installation
This chapter describes the PC-TIO-10 jumper configurations, installation of the PC-TIO-10
board in your computer, signal connections to the PC-TIO-10 board, and cabling instructions.
Board Configuration
The PC-TIO-10 contains one DIP switch and two jumpers to configure the base I/O address and
interrupts, respectively. The DIP switch and jumpers are shown in the parts locator diagram in
Figure 2-1.
The PC-TIO-10 is configured at the factory to a base I/O address of hex 1A0, to interrupt
level 5, and to local interrupt setting No Connect and No Connect. These settings (shown in
Table 2-1) are suitable for most systems. However, if your system has other hardware at this
base I/O address or interrupt level, you need to change these settings on the PC-TIO-10 (as
described in the following pages) or on the other hardware. Record your settings in the PC-TIO-
10 Hardware and Software Configuration Form in Appendix F, Customer Communication.
Table 2-1. PC-TIO-10 Factory-Set Switch and Jumper Settings
Base I/O Address Hex 1A0
(factory setting)
Interrupt Level Interrupt level 5 selected
(factory setting)
Local Interrupt No Connect and No Connect
(factory setting)
7612345
U12
A9
A8
A7
A6
A5
A4
A3
(The black side indicates the side of the
switch that is pushed down.)
W1: Row 5
W2: No Connect
No Connect

Configuration and Installation Chapter 2
PC-TIO-10 User Manual 2-2 © National Instruments Corporation
Figure 2-1. PC-TIO-10 Parts Locator Diagram
Base I/O Address Settings
The base I/O address for the PC-TIO-10 is determined by the switches at position U12 (see
Figure 2-1). The switches are set at the factory for the I/O address hex 1A0. With this default
setting, the PC-TIO-10 uses the I/O address space hex 1A0 through 1A7.
Note: Verify that this space is not already used by other equipment installed in your computer.
If any equipment in your computer uses this I/O address space, you must change the base
I/O address for the PC-TIO-10 or for the other device.

Chapter 2 Configuration and Installation
© National Instruments Corporation 2-3 PC-TIO-10 User Manual
Each switch in U12 corresponds to one of the address lines A9 through A3. Thus, the range for
possible base I/O address settings is hex 000 through 3F8. Base I/O address values hex 000
through 0FF are reserved for system use. Base I/O values hex 100 through 3FF are available on
the I/O channel. A2, A1, and A0 are used by the PC-TIO-10 to decode accesses to the onboard
registers. On the U12 DIP switches, press the side marked OFF to select a binary value of 1 for
the corresponding address bit. Press the other side of the switch to select a binary value of 0 for
the corresponding address bit. Figure 2-2 shows two possible switch settings. The black side
indicates the side of the switch that is pushed down.
A. Switches Set to Default Setting (Base I/O Address Hex 1A0)
O F F
12345
O N
U12
A9
A8
A7
A6
A5
A4
A3
6 7
B. Switches Set to Base I/O Address Hex 228
O F F
12345
O N
U12
A9
A8
A7
A6
A5
A4
A3
67
Figure 2-2. Example Base I/O Address Switch Settings

Configuration and Installation Chapter 2
PC-TIO-10 User Manual 2-4 © National Instruments Corporation
Table 2-2. Default Settings of National Instruments Products for the PC
Board DMA Channel Interrupt Level Base I/O Address
AT-A2150
AT-AO-6/10
AT-DIO-32F
AT-DSP2200
AT-GPIB
AT-MIO-16
AT-MIO-16D
AT-MIO-16F-5
AT-MIO-16X
AT-MIO-64F-5
GPIB-PCII
GPIB-PCIIA
GPIB-PCIII
Lab-PC
PC-DIO-24
PC-DIO-96
PC-LPM-16
PC-TIO-10
None*
Channel 5
Channels 5, 6
None*
Channel 5
Channels 6, 7
Channels 6, 7
Channels 6, 7
None*
None*
Channel 1
Channel 1
Channel 1
Channel 3
None
None
None
None
None*
Lines 11, 12
Lines 11, 12
None*
Line 11
Line 10
Lines 5, 10
Line 10
None*
None*
Line 7
Line 7
Line 7
Line 5
Line 5
Line 5
Line 5
Line 5
120 hex
1C0 hex
240 hex
120 hex
2C0 hex
220 hex
220 hex
220 hex
220 hex
220 hex
2B8 hex
02E1 hex
280 hex
260 hex
210 hex
180 hex
260 hex
1A0 hex
* These settings are software configurable and are disabled at startup time.
Interrupt Level Selection
There are two sets of jumpers for interrupt selection on the PC-TIO-10 board. W1 is used for
selecting the interrupt level, while W2 is used for local selection of two of the counter outputs as
interrupt sources. The locations of these jumpers are shown in Figure 2-1.
The PC-TIO-10 board can connect to any one of six interrupt lines of the PC I/O Channel:
IRQ3, IRQ4, IRQ5, IRQ6, IRQ7, or IRQ9. You select the interrupt line by setting a jumper on
W1. The default interrupt line is IRQ5. To change to another line, remove the jumper from
IRQ5 and place it on the pins for another request line. Figure 2-3 shows the default factory
setting for IRQ5.
W1
IRQ9 IRQ7 IRQ6 IRQ5 IRQ3 IRQ4
IRQ3 IRQ9
Figure 2-3. Interrupt Jumper Setting for IRQ5 (Factory Setting)