National Instruments PC-DIO-24 User Manual

Contents

National Instruments PC-DIO-24 User Manual Manual pdf 6 page image

© National Instruments Corporation vii PC-DIO-24 User ManualContentsAbout This Manual............................................................................................................. xiOrganization of This Manual .........................................................................................xiConventions Used in This Manual ................................................................................. xiiNational Instruments Documentation ............................................................................xiiRelated Documentation .................................................................................................. xiiiCustomer Communication .............................................................................................xiiiChapter 1Introduction .......................................................................................................................... 1-1About the PC-DIO-24 ....................................................................................................1-1What You Need to Get Started ...................................................................................... 1-2Software Programming Choices .................................................................................... 1-2LabVIEW and LabWindows/CVI Application Software ..................................1-2NI-DAQ Driver Software................................................................................... 1-3Register-Level Programming .............................................................................1-4Optional Equipment .......................................................................................................1-4Custom Cables ...................................................................................................1-4Unpacking ......................................................................................................................1-6Chapter 2Configuration and Installation ...................................................................................... 2-1Board Configuration ......................................................................................................2-1Base I/O Address Settings..................................................................................2-2Interrupt Selection ..............................................................................................2-4Interrupt Enable Settings........................................................................2-4Interrupt Level Settings..........................................................................2-4Installation......................................................................................................................2-5Signal Connections ........................................................................................................ 2-6I/O Connector Pin Description........................................................................... 2-6Signal Connection Descriptions ......................................................................... 2-7Port C Pin Assignments ......................................................................... 2-7Timing Specifications ........................................................................................2-8Mode 1 Input Timing .............................................................................2-9Mode 1 Output Timing .......................................................................... 2-10Mode 2 Bidirectional Timing................................................................. 2-11Chapter 3Theory of Operation .......................................................................................................... 3-1Address Decoder ............................................................................................................3-2Bus Transceivers ............................................................................................................3-2PC I/O Channel Control Circuitry ................................................................................. 3-282C55A Programmable Peripheral Interface ................................................................3-2Interrupt Control Circuitry .............................................................................................3-2Digital I/O Connector.....................................................................................................3-2