National Instruments PC-DIO-96 User manual

© Copyright 1990, 1995 National Instruments Corporation.
All Rights Reserved.
PC-DIO-96
User Manual
Digital I/O Board for the IBM PC/XT/AT
September 1995 Edition
Part Number 320289B-01

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The PC-DIO-96 is warranted against defects in materials and workmanship for a period of one year from the date of
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equipment that proves to be defective during the warranty period. This warranty includes parts and labor.
The media on which you receive National Instruments software are warranted not to fail to execute programming
instructions, due to defects in materials and workmanship, for a period of 90 days from date of shipment, as
evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace software
media that do not execute programming instructions if National Instruments receives notice of such defects during
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or error free.
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© National Instruments Corporation
vPC-DIO-96 User Manual
Contents
Chapter 1
About This Manual............................................................................................................v
Organization of This Manual ........................................................................................v
Conventions Used in This Manual ................................................................................vi
National Instruments Documentation............................................................................vii
Related Documentation .................................................................................................vii
Chapter 1
Introduction..........................................................................................................................1-1
About the PC-DIO-96 ...................................................................................................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
Cabling ..............................................................................................................1-4
Unpacking .....................................................................................................................1-5
Chapter 2
Configuration and Installation ..................................................................................... 2-1
Board Configuration......................................................................................................2-1
Base I/O Address Settings.................................................................................2-2
Interrupt Level Selection ...................................................................................2-5
Installation .....................................................................................................................2-5
Signal Connections........................................................................................................2-6
I/O Connector Pin Description ..........................................................................2-7
I/O Connector Signal Connection Descriptions ................................................2-8
Port C Pin Assignments.........................................................................2-8
Cable Assembly Connectors .............................................................................2-9
Digital I/O Signal Connections .........................................................................2-12
Power Connections............................................................................................2-13
Timing Specifications........................................................................................2-14
Mode 1 Input Timing ............................................................................2-15
Mode 1 Output Timing..........................................................................2-16
Mode 2 Bidirectional Timing ................................................................2-17
Chapter 3
Theory of Operation..........................................................................................................3-1
Data Transceivers ..........................................................................................................3-2
PC I/O Channel Control Circuitry.................................................................................3-2
82C55A Programmable Peripheral Interface ................................................................3-2
8253 Programmable Interval Timer ..............................................................................3-2
Interrupt Control Circuitry ............................................................................................3-2
Digital I/O Connector....................................................................................................3-3

Contents
PC-DIO-96 User Manual vi © National Instruments Corporation
Chapter 4
Register-Level Programming.........................................................................................4-1
Introduction ...................................................................................................................4-1
Register Map .................................................................................................................4-2
Register Descriptions ....................................................................................................4-3
Register Description for the 82C55A................................................................4-3
Register Description for the 8253 .....................................................................4-4
Register Description for the Interrupt Control Registers ..................................4-5
Interrupt Control Register 1 ..................................................................4-6
Interrupt Control Register 2 ..................................................................4-8
Programming Considerations for the 82C55A..............................................................4-9
Modes of Operation for the 82C55A.................................................................4-9
Mode 0 ...................................................................................................4-9
Mode 1 ...................................................................................................4-9
Mode 2 ...................................................................................................4-10
Single Bit Set/Reset Feature..................................................................4-10
Mode 0—Basic I/O ...........................................................................................4-10
Mode 0 Programming Example ............................................................4-11
Mode 1—Strobed Input.....................................................................................4-12
Mode 1 Input Programming Example ...................................................4-14
Mode 1—Strobed Output ..................................................................................4-15
Mode 1 Output Programming Example ................................................4-16
Mode 2—Bidirectional Bus...............................................................................4-17
Mode 2 Programming Example ............................................................4-19
Interrupt Programming Examples for the 82C55A ...........................................4-19
Programming Considerations for the 8253 ...................................................................4-21
General Information ..........................................................................................4-21
Interrupt Programming Example for the 8253 ..................................................4-22
Interrupt Handling .........................................................................................................4-28
Appendix A
Specifications........................................................................................................................A-1
Appendix B
OKI 82C55A Data Sheet..................................................................................................B-1
Appendix C
AMD 8253 Data Sheet.......................................................................................................C-1
Appendix D
Customer Communication..............................................................................................D-1
Glossary ......................................................................................................................Glossary-1
Index..................................................................................................................................Index-1

Contents
© National Instruments Corporation vii PC-DIO-96 User Manual
Figures
Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your
Hardware ...........................................................................................................1-3
Figure 2-1. PC-DIO-96 Parts Locator Diagram...................................................................2-2
Figure 2-2. Example Base I/O Address Switch Settings......................................................2-3
Figure 2-3. Interrupt Jumper Setting for IRQ5 (Factory Setting) ........................................2-5
Figure 2-4. Digital I/O Connector Pin Assignments............................................................2-7
Figure 2-5. Cable-Assembly Connector Pinout for Pins 1 through 50 ................................2-10
Figure 2-6. Cable-Assembly Connector Pinout for Pins 51 through 100 ............................2-11
Figure 2-7. Digital I/O Connections.....................................................................................2-13
Figure 3-1. PC-DIO-96 Block Diagram...............................................................................3-1
Figure 4-1. Control Word Formats for the 82C55A ............................................................4-3
Figure 4-2. Control-Word Format for the 8253 ...................................................................4-4
Tables
Table 2-1. PC-DIO-96 Factory-Set Switch and Jumper Settings .......................................2-1
Table 2-2. Switch Settings with Corresponding Base I/O Address
and Base I/O Address Space .............................................................................2-4
Table 2-3. Port C Signal Assignments................................................................................2-9
Table 4-1. PC-DIO-96 Address Map..................................................................................4-2
Table 4-2. Port C Set/Reset Control Words........................................................................4-4
Table 4-3. Mode 0 I/O Configurations ...............................................................................4-11
Table A-1. Maximum Average Transfer Rates for the PC-DIO-96 ....................................A-3

© National Instruments Corporation
vPC-DIO-96 User Manual
Contents
Chapter 1
About This Manual............................................................................................................v
Organization of This Manual ........................................................................................v
Conventions Used in This Manual ................................................................................vi
National Instruments Documentation............................................................................vii
Related Documentation .................................................................................................vii
Chapter 1
Introduction..........................................................................................................................1-1
About the PC-DIO-96 ...................................................................................................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
Cabling ..............................................................................................................1-4
Unpacking .....................................................................................................................1-5
Chapter 2
Configuration and Installation ..................................................................................... 2-1
Board Configuration......................................................................................................2-1
Base I/O Address Settings.................................................................................2-2
Interrupt Level Selection ...................................................................................2-5
Installation .....................................................................................................................2-5
Signal Connections........................................................................................................2-6
I/O Connector Pin Description ..........................................................................2-7
I/O Connector Signal Connection Descriptions ................................................2-8
Port C Pin Assignments.........................................................................2-8
Cable Assembly Connectors .............................................................................2-9
Digital I/O Signal Connections .........................................................................2-12
Power Connections............................................................................................2-13
Timing Specifications........................................................................................2-14
Mode 1 Input Timing ............................................................................2-15
Mode 1 Output Timing..........................................................................2-16
Mode 2 Bidirectional Timing ................................................................2-17
Chapter 3
Theory of Operation..........................................................................................................3-1
Data Transceivers ..........................................................................................................3-2
PC I/O Channel Control Circuitry.................................................................................3-2
82C55A Programmable Peripheral Interface ................................................................3-2
8253 Programmable Interval Timer ..............................................................................3-2
Interrupt Control Circuitry ............................................................................................3-2
Digital I/O Connector....................................................................................................3-3

Contents
PC-DIO-96 User Manual vi © National Instruments Corporation
Chapter 4
Register-Level Programming.........................................................................................4-1
Introduction ...................................................................................................................4-1
Register Map .................................................................................................................4-2
Register Descriptions ....................................................................................................4-3
Register Description for the 82C55A................................................................4-3
Register Description for the 8253 .....................................................................4-4
Register Description for the Interrupt Control Registers ..................................4-5
Interrupt Control Register 1 ..................................................................4-6
Interrupt Control Register 2 ..................................................................4-8
Programming Considerations for the 82C55A..............................................................4-9
Modes of Operation for the 82C55A.................................................................4-9
Mode 0 ...................................................................................................4-9
Mode 1 ...................................................................................................4-9
Mode 2 ...................................................................................................4-10
Single Bit Set/Reset Feature..................................................................4-10
Mode 0—Basic I/O ...........................................................................................4-10
Mode 0 Programming Example ............................................................4-11
Mode 1—Strobed Input.....................................................................................4-12
Mode 1 Input Programming Example ...................................................4-14
Mode 1—Strobed Output ..................................................................................4-15
Mode 1 Output Programming Example ................................................4-16
Mode 2—Bidirectional Bus...............................................................................4-17
Mode 2 Programming Example ............................................................4-19
Interrupt Programming Examples for the 82C55A ...........................................4-19
Programming Considerations for the 8253 ...................................................................4-21
General Information ..........................................................................................4-21
Interrupt Programming Example for the 8253 ..................................................4-22
Interrupt Handling .........................................................................................................4-28
Appendix A
Specifications........................................................................................................................A-1
Appendix B
OKI 82C55A Data Sheet..................................................................................................B-1
Appendix C
AMD 8253 Data Sheet.......................................................................................................C-1
Appendix D
Customer Communication..............................................................................................D-1
Glossary ......................................................................................................................Glossary-1
Index..................................................................................................................................Index-1

Contents
© National Instruments Corporation vii PC-DIO-96 User Manual
Figures
Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your
Hardware ...........................................................................................................1-3
Figure 2-1. PC-DIO-96 Parts Locator Diagram...................................................................2-2
Figure 2-2. Example Base I/O Address Switch Settings......................................................2-3
Figure 2-3. Interrupt Jumper Setting for IRQ5 (Factory Setting) ........................................2-5
Figure 2-4. Digital I/O Connector Pin Assignments............................................................2-7
Figure 2-5. Cable-Assembly Connector Pinout for Pins 1 through 50 ................................2-10
Figure 2-6. Cable-Assembly Connector Pinout for Pins 51 through 100 ............................2-11
Figure 2-7. Digital I/O Connections.....................................................................................2-13
Figure 3-1. PC-DIO-96 Block Diagram...............................................................................3-1
Figure 4-1. Control Word Formats for the 82C55A ............................................................4-3
Figure 4-2. Control-Word Format for the 8253 ...................................................................4-4
Tables
Table 2-1. PC-DIO-96 Factory-Set Switch and Jumper Settings .......................................2-1
Table 2-2. Switch Settings with Corresponding Base I/O Address
and Base I/O Address Space .............................................................................2-4
Table 2-3. Port C Signal Assignments................................................................................2-9
Table 4-1. PC-DIO-96 Address Map..................................................................................4-2
Table 4-2. Port C Set/Reset Control Words........................................................................4-4
Table 4-3. Mode 0 I/O Configurations ...............................................................................4-11
Table A-1. Maximum Average Transfer Rates for the PC-DIO-96 ....................................A-3