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PC-DIO-24 User Manual

Contents

About This Manual

.............................................................................................................

Organization of This Manual .........................................................................................

Conventions Used in This Manual .................................................................................

National Instruments Documentation ............................................................................

Related Documentation ..................................................................................................

Customer Communication .............................................................................................

Chapter 1
Introduction

..........................................................................................................................

About the PC-DIO-24 ....................................................................................................

What You Need to Get Started ......................................................................................

Software Programming Choices ....................................................................................

LabVIEW and LabWindows/CVI Application Software ..................................

NI-DAQ Driver Software...................................................................................

Register-Level Programming .............................................................................

Optional Equipment .......................................................................................................

Custom Cables ...................................................................................................

Unpacking ......................................................................................................................

Chapter 2
Configuration and Installation

......................................................................................

Board Configuration ......................................................................................................

Base I/O Address Settings..................................................................................

Interrupt Selection ..............................................................................................

Interrupt Enable Settings........................................................................

Interrupt Level Settings..........................................................................

Installation......................................................................................................................

Signal Connections ........................................................................................................

I/O Connector Pin Description...........................................................................

Signal Connection Descriptions .........................................................................

Port C Pin Assignments .........................................................................

Timing Specifications ........................................................................................

Mode 1 Input Timing .............................................................................

Mode 1 Output Timing ..........................................................................

Mode 2 Bidirectional Timing.................................................................

Chapter 3
Theory of Operation

..........................................................................................................

Address Decoder ............................................................................................................

Bus Transceivers ............................................................................................................

PC I/O Channel Control Circuitry .................................................................................

82C55A Programmable Peripheral Interface ................................................................

Interrupt Control Circuitry .............................................................................................

Digital I/O Connector.....................................................................................................