National Instruments PC-DIO-24/PnP

Contents

National Instruments Corporation vii PC-DIO-24/PnP User Manual

Mode 1—Strobed Input..................................................................................C-11

Mode 1 Input Programming Example..............................................C-13

Mode 1—Strobed Output...............................................................................C-14

Mode 1 Output Programming Example...........................................C-16

Mode 2—Bidirectional Bus............................................................................C-17

Mode 2 Programming Example.......................................................C-19

Interrupt Programming Examples for the 82C55A........................................C-20

Interrupt Handling.........................................................................................................C-22

Appendix D

Differences between the PC-DIO-24PnP and thePC-DIO-24 .....................................D-1

Configuration................................................................................................................D-2

Base I/O Address Settings..............................................................................D-3

Interrupt Selection..........................................................................................D-5

Interrupt Enable Settings..................................................................D-6

Interrupt Level Settings....................................................................D-6

Installation....................................................................................................................D-7

Appendix E

Customer Communication

Glossary

Index

Figures

Figure 1-1. The Relationship between the Programming Environment,

NI-DAQ,and Your Hardware ...............................................................1-4

Figure 2-1. Jumper W1 Location..............................................................................2-1

Figure 3-1. Digital I/O Connector Pin Assignments................................................3-2

Figure 3-2. Digital I/O Connections.........................................................................3-6

Figure 3-3. DIO Channel Configured for High DIO Power-up State

with External Load.................................................................................3-8

Figure 3-4. DIO Channel Configured for Low DIO Power-up State

with External Load.................................................................................3-9

Figure 3-5. Mode 1 Timing Specification for Input Transfers.................................3-12

Figure 3-6. Mode 1 Timing Specification for Output Transfers.............................. 3-13