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© National Instruments Corporation vii PC-DIO-24 User Manual
Contents
About This Manual............................................................................................................. xi
Organization of This Manual ......................................................................................... xi
Conventions Used in This Manual................................................................................. xii
National Instruments Documentation ............................................................................ xii
Related Documentation.................................................................................................. xiii
Customer Communication ............................................................................................. xiii
Chapter 1
Introduction
.......................................................................................................................... 1-1
About the PC-DIO-24 .................................................................................................... 1-1
What You Need to Get Started ...................................................................................... 1-2
Software Programming Choices .................................................................................... 1-2
LabVIEW and LabWindows/CVI Application Software .................................. 1-2
NI-DAQ Driver Software................................................................................... 1-3
Register-Level Programming............................................................................. 1-4
Optional Equipment ....................................................................................................... 1-4
Custom Cables ................................................................................................... 1-4
Unpacking ...................................................................................................................... 1-6
Chapter 2
Configuration and Installation
...................................................................................... 2-1
Board Configuration ...................................................................................................... 2-1
Base I/O Address Settings.................................................................................. 2-2
Interrupt Selection.............................................................................................. 2-4
Interrupt Enable Settings........................................................................ 2-4
Interrupt Level Settings.......................................................................... 2-4
Installation...................................................................................................................... 2-5
Signal Connections ........................................................................................................ 2-6
I/O Connector Pin Description........................................................................... 2-6
Signal Connection Descriptions......................................................................... 2-7
Port C Pin Assignments ......................................................................... 2-7
Timing Specifications ........................................................................................ 2-8
Mode 1 Input Timing ............................................................................. 2-9
Mode 1 Output Timing .......................................................................... 2-10
Mode 2 Bidirectional Timing................................................................. 2-11
Chapter 3
Theory of Operation
.......................................................................................................... 3-1
Address Decoder ............................................................................................................ 3-2
Bus Transceivers ............................................................................................................ 3-2
PC I/O Channel Control Circuitry ................................................................................. 3-2
82C55A Programmable Peripheral Interface ................................................................ 3-2
Interrupt Control Circuitry ............................................................................................. 3-2
Digital I/O Connector..................................................................................................... 3-2
- PC-DIO-24 1
- Limited Warranty 3
- Copyright 3
- Trademarks 3
- Instructions to Users 5
- Contents 6
- About This Manual 10
- Related Documentation 11
- Customer Communication 11
- Chapter 1 12
- Introduction 12
- What You Need to Get Started 13
- Software Programming Choices 13
- NI-DAQ Driver Software 14
- Optional Equipment 15
- Chapter 1 Introduction 16
- Unpacking 17
- Chapter 2 18
- Base I/O Address Settings 19
- Interrupt Selection 21
- Installation 22
- Signal Connections 23
- Timing Specifications 25
- Chapter 3 29
- Theory of Operation 29
- Theory of Operation Chapter 3 30
- Chapter 4 31
- Register-Level Programming 31
- Single Bit Set/Reset Feature 32
- Register Map 33
- Register Descriptions 33
- Programming Considerations 35
- Mode 1–Strobed Input 37
- Mode 1–Strobed Output 39
- 1 X X X X10X 40
- 76543210 40
- Mode 2–Bidirectional Bus 42
- Interrupt Handling 45
- Appendix A 47
- Specifications 47
- Physical 48
- Transfer Rates 48
- Appendix B 49
- I/O Connector 49
- OKI 82C55A Data Sheet 50
- PC-DIO-24 User Manual C-2 51
- PC-DIO-24 User Manual C-4 53
- PC-DIO-24 User Manual C-6 55
- PC-DIO-24 User Manual C-8 57
- PC-DIO-24 User Manual C-10 59
- PC-DIO-24 User Manual C-12 61
- PC-DIO-24 User Manual C-14 63
- PC-DIO-24 User Manual C-16 65
- Appendix D 67
- Technical Support Form 68
- Configuration Form 69
- Documentation Comment Form 70
- Glossary 71
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