National Instruments PC-DIO-24 user manual Contents

© 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