National Instruments PCI-DIO-96 User Manual

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PCI-DIO-96 User Manual

A 96-Bit Parallel Digital I/O Interface

for PCI Bus Computers

January 1997 Edition

Part Number 320938B-01

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Important Information

Warranty

The PCI-DIO-96 is warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace 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 the warranty period. National Instruments does not warrant that the operation of the software shall be uninterrupted or error free.

A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before any equipment will be accepted for warranty work. National Instruments will pay the shipping costs of returning to the owner parts which are covered by warranty.

National Instruments believes that the information in this manual is accurate. The document has been carefully reviewed for technical accuracy. In the event that technical or typographical errors exist, National Instruments reserves the right to make changes to subsequent editions of this document without prior notice to holders of this edition. The reader should consult National Instruments if errors are suspected. In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it.

XCEPT AS SPECIFIED HEREIN

SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE

USTOMER’S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL

NSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER

WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA, PROFITS, USE OF PRODUCTS, OR INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY THEREOF

Instruments will apply regardless of the form of action, whether in contract or tort, including negligence. Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover damages, defects, malfunctions, or service failures caused by owner’s failure to follow the National Instruments installation, operation, or maintenance instructions; owner’s modification of the product; owner’s abuse, misuse, or negligent acts; and power failure or surges, fire, flood, accident, actions of third parties, or other events outside reasonable control.

ATIONAL INSTRUMENTS MAKES NO WARRANTIES, EXPRESS OR IMPLIED, AND

, N

ATIONAL INSTRUMENTS

. N

. This limitation of the liability of National

Copyright

Under the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or mechanical, including photocopying, recording, storing in an information retrieval system, or translating, in whole or in part, without the prior written consent of National Instruments Corporation.

Trademarks

LabVIEW®, NI-DAQ®, ComponentWorks™, CVI™, MITE™, and SCXI™ are trademarks of National Instruments Corporation.

Product and company names listed are trademarks or trade names of their respective companies.

WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS

National Instruments products are not designed with components and testing intended to ensure a level of reliability suitable for use in treatment and diagnosis of humans. Applications of National Instruments products involving medical or clinical treatment can create a potential for accidental injury caused by product failure, or by errors on the part of the user or application designer. Any use or application of National Instruments products for or involving medical or clinical treatment must be performed by properly trained and qualified medical personnel, and all traditional medical safeguards, equipment, and procedures that are appropriate in the particular situation to prevent serious injury or death should always continue to be used when National Instruments products are being used. National Instruments products are NOT intended to be a substitute for any form of established process, procedure, or equipment used to monitor or safeguard human health and safety in medical or clinical treatment.

About This Manual

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

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

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

Related Documentation.................................................................................................xii

Customer Communication............................................................................................xii

Chapter 1 Introduction

About the PCI-DIO-96..................................................................................................1-1

What You Need to Get Started .....................................................................................1-2

Software Programming Choices...................................................................................1-2

National Instruments Application Software...................................................1-2

NI-DAQ Driver Software...............................................................................1-3

Optional Equipment......................................................................................................1-5

Custom Cabling ............................................................................................................1-5

Unpacking.....................................................................................................................1-6

Table

Contents

Chapter 2 Installation and Configuration

Software Installation.....................................................................................................2-1

Hardware Installation....................................................................................................2-1

Board Configuration .....................................................................................................2-2

Chapter 3 Signal Connections

I/O Connector................................................................................................................3-1

I/O Connector Pin Descriptions......................................................................3-1

Port C Pin Assignments ...................................................................3-5

Digital I/O Signal Connections ......................................................................3-6

Power Connections.........................................................................................3-8

Timing Specifications.....................................................................................3-8

National Instruments Corporation v PCI-DIO-96 User Manual

Table of Contents

Mode 1 Input Timing....................................................................... 3-10

Mode 1 Output Timing.................................................................... 3-11

Mode 2 Bidirectional Timing .......................................................... 3-12

Chapter 4 Theory of Operation

Functional Overview.................................................................................................... 4-1

PCI Interface Circuitry...................................................................................4-2

82C55A Programmable Peripheral Interface................................................. 4-3

82C53 Programmable Interval Timer ............................................................ 4-3

Interrupt Control Circuitry............................................................................. 4-3

Chapter 5 Register Map and Description

Introduction .................................................................................................................. 5-1

Register Map ................................................................................................................ 5-2

Register Descriptions.................................................................................................... 5-3

Interrupt Control Register 1............................................................. 5-7

Interrupt Control Register 2............................................................. 5-9

Interrupt Clear Register ................................................................... 5-10

Chapter 6 Programming

PCl Local Bus...............................................................................................................6-1

Programming Examples .............................................................................................. 6-1

PCI Initialization for the PC........................................................................... 6-3

PCI Initialization for the Macintosh............................................................... 6-4

Programming Options...................................................................... 6-4

Using NI-DAQ and the Driver Toolkit .............................6-4

Performing Simple Accesses............................................. 6-5

Developing Your Own Interrupt Method..........................6-5

Port Identification............................................................................ 6-6

Programming Considerations for the 82C55A............................................................. 6-7

Modes of Operation ....................................................................................... 6-7

Mode 0............................................................................................. 6-7

Mode 1............................................................................................. 6-8

Mode 2............................................................................................. 6-8

PCI-DIO-96 User Manual vi

National Instruments Corporation

Table of Contents

Single Bit Set/Reset Feature ............................................................6-8

Mode 0–Basic I/O...........................................................................................6-8

Mode 0 Basic I/O Programming Example.......................................6-10

Mode 1–Strobed Input....................................................................................6-10

Port C Status-Word Bit Definitions for Input (Ports A and B)........6-12

Mode 1 Strobed Input Programming Example ................................6-13

Mode 1–Strobed Output.................................................................................6-13

Port C Status-Word Bit Definitions for Output (Ports A and B) .....6-15

Mode 1 Strobed Output Programming Example..............................6-16

Mode 2–Bidirectional Bus..............................................................................6-16

Port C Status-Word Bit Definitions for Bidirectional Data Path

(Port A Only).................................................................................6-18

Mode 2 Bidirectional Bus Programming Example..........................6-19

Interrupt Handling.........................................................................................................6-20

Interrupt Programming Examples for the 82C55A ........................................6-20

Mode 1 Strobed Input Programming Example ................................6-21

Mode 1 Strobed Output Programming Example..............................6-21

Mode 2 Bidirectional Bus Programming Example..........................6-21

Programming Considerations for the 82C53 ................................................................6-22

General Information .......................................................................................6-22

Interrupt Programming Example....................................................................6-22

Appendix A Specifications

Appendix B MSM82C55A Data Sheet

Appendix C MSM82C53 Data Sheet

Appendix D Customer Communication

Glossary Index

National Instruments Corporation vii PCI-DIO-96 User Manual

Table of Contents

Figures

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

Figure 3-1. PCI-DIO-96 Cable-Assembly Connector Pinout for Pins 1 through

Figure 3-2. PCI-DIO-96 Cable-Assembly Connector Pinout for Pins 51 through

Figure 3-3. Digital I/O Connections Block Diagram............................................... 3-7

Figure 3-4. Timing Specifications for Mode 1 Input Transfer................................. 3-10

Figure 3-5. Timing Specifications for Mode 1 Output Transfer.............................. 3-11

Figure 3-6. Timing Specifications for Mode 2 Bidirectional Transfer.................... 3-12

Figure 4-1. PCI-DIO-96 Block Diagram.................................................................. 4-2

Figure 4-2. PCI-DIO-96 Interrupt Control Circuitry Block Diagram......................4-4

Figure 5-1. Control Word Formats for the 82C55A................................................. 5-4

Figure 5-2. Control Word Format for the 82C53..................................................... 5-6

Figure 6-1. Control Word to Configure Port A for Mode 1 Input ........................... 6-10

Figure 6-2. Control Word to Configure Port B for Mode 1 Input............................ 6-11

Figure 6-3. Port C Pin Assignments on I/O Connector when Port C Configured

Figure 6-4. Control Word to Configure Port A for Mode 1 Output......................... 6-14

Figure 6-5. Control Word to Configure Port B for Mode 1 Output......................... 6-14

Figure 6-6. Port C Pin Assignments on I/O Connector when Port C Configured

Figure 6-7. Control Word to Configure Port A as Mode 2 Bidirectional

Figure 6-8. Port C Pin Assignments on I/O Connector when Port C is

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

50 with the R1005050 Ribbon Cable .................................................... 3-2

100 with the R1005050 Ribbon Cable .................................................. 3-3

for Mode 1 Input.................................................................................... 6-13

for Mode 1 Output................................................................................. 6-16

Data Bus ................................................................................................ 6-17

Configured for Mode 2..........................................................................6-19

Tables

Table 3-1. Signal Descriptions for PCI-DIO-96 I/O Connector Pins..................... 3-4

Table 3-2. Port C Signal Assignments....................................................................3-5

Table 3-3. Signal Names Used in Timing Diagrams.............................................. 3-8

Table 5-1. PCI-DIO-96 Address Map..................................................................... 5-2

Table 5-2. Port C Set/Reset Control Words............................................................ 5-5

Table 6-1. Port Identification..................................................................................6-7

Table 6-2. Mode 0 I/O Configurations ................................................................... 6-9

PCI-DIO-96 User Manual viii

National Instruments Corporation

This manual describes the electrical and mechanical aspects of the

PCI-DIO-96 and contains information concerning its installation,

operation, and programming. The PCI-DIO-96 is a member of the

National Instruments PCI Series of expansion boards for PCI bus

computers. These boards are designed for high-performance data

acquisition and control for applications in laboratory testing,

production testing, and industrial process monitoring and control.

Organization of This Manual

The

PCI-DIO-96 User Manual

• Chapter 1, need to get started, software programming choices, and optional equipment; describes custom cabling options; and explains how to unpack the PCI-DIO-96.

• Chapter 2, and configure your PCI-DIO-96 board.

• Chapter 3, output signal connections to your PCI-DIO-96 via the board I/O connector.

• Chapter 4, the PCI-DIO-96 and explains the operation of each functional unit comprising the PCI-DIO-96.

• Chapter 5, address and function of each PCI-DIO-96 register.

• Chapter 6, the PCI-DIO-96 circuitry, and examples of the programming steps necessary to execute an operation.

• Appendix A, PCI-DIO-96.

Introduction

Installation and Configuration

Signal Connections

Theory of Operation

Programming

Specifications

About

This

Manual

is organized as follows:

, describes the PCI-DIO-96; lists what you

, describes how to install

, describes how to make input and

, contains a functional overview of

, describes in detail the

, contains instructions on how to operate

, lists the specifications of the

National Instruments Corporation ix PCI-DIO-96 User Manual

About This Manual

• Appendix B, data sheet for the MSM82C55A CMOS programmable peripheral interface (OKI Semiconductor). This device is used on the PCI-DIO-96.

• Appendix C, sheet for the MSM82C53 CMOS programmable interval timer (OKI Semiconductor). This timer is used on the PCI-DIO-96.

• Appendix D, use to request help from National Instruments or to comment on our products.

• The

Glossary

used in this manual, including abbreviations, acronyms, metric prefixes, mnemonics, symbols, and terms.

Index

in this manual, including the page where each one can be found.

MSM82C55A Data Sheet,

MSM82C53 Data Sheet,

Customer Communication

contains an alphabetical list and description of terms

contains an alphabetical list of key terms and topics used

contains a manufacturer

contains a manufacturer data

, contains forms you can

Conventions Used in This Manual

The following conventions are used in this manual:

bold

bold italic

italic

Macintosh Macintosh refers to all Macintosh computers with PCI bus, unless

monospace Text in this font denotes text or characters that are to be literally input

NI-DAQ NI-DAQ is used in this manual to refer to NI-DAQ software for PC or

PC PC refers to all IBM PC compatible computers with PCI bus. PPI x PPI x, where the x is replaced by A, B, C, or D, refers to one of the four

Bold text denotes menu items, function panel items, and dialog box buttons or options.

Bold italic text denotes a note, caution, or warning. Italic text denotes emphasis, a cross reference, or an introduction to a

key concept.

otherwise noted.

from the keyboard, sections of code, programming examples, and syntax examples. This font is also used for the proper names of disk drives, paths, directories, programs, subprograms, subroutines, device names, functions, variables, parameters, file names, and extensions, and for statements and comments taken from program code.

Macintosh computers unless otherwise noted.

programmable peripheral interface (PPI) chips on the PCI-DIO-96.

PCI-DIO-96 User Manual x

National Instruments Corporation

About This Manual

SCXI SCXI stands for Signal Conditioning eXtensions for Instrumentation

and is a National Instruments product line designed to perform front-end signal conditioning for National Instruments plug-in DAQ boards.

< > Angle brackets containing numbers separated by an ellipses represent a

range of values associated with a bit, signal, or port (for example, ACH<0..7> stands for ACH0 through ACH7).

Abbreviations, acronyms, metric prefixes, mnemonics, symbols, and terms are listed in the Glossary.

National Instruments Documentation

The PCI-DIO-96 User Manual is one piece of the documentation set for your data acquisition system. You could have any of several types of manuals, depending on the hardware and software in your system. Use the manuals you have as follows:

• Getting Started with SCXI—If you are using SCXI, this is the first manual you should read. It gives an overview of the SCXI system and contains the most commonly needed information for the modules, chassis, and software.

• Your SCXI hardware user manuals—If you are using SCXI, read these manuals next for detailed information about signal connections and module configuration. They also explain in greater detail how the module works and contain application hints.

• Your DAQ hardware user manuals—These manuals have detailed information about the DAQ hardware that plugs into or is connected to your computer. Use these manuals for hardware installation and configuration instructions, specification information about your DAQ hardware, and application hints.

• Software documentation—Examples of software documentation you may have are the LabVIEW, LabWindows/CVI, or ComponentWorks documentation sets and the NI-DAQ documentation. After you set up your hardware system, use either the application software or the NI-DAQ documentation to help you write your application. If you have a large and complicated system, it is worthwhile to look through the software documentation before you configure your hardware.

National Instruments Corporation xi PCI-DIO-96 User Manual

About This Manual

• Accessory installation guides or manuals—If you are using accessory products, read the terminal block and cable assembly installation guides or accessory board user manuals. They explain how to physically connect the relevant pieces of the system. Consult these guides when you are making your connections.

• SCXI Chassis User Manual—If you are using SCXI, read these manuals for maintenance information on the chassis and installation instructions.

Customer Communication

National Instruments wants to receive your comments on our products and manuals. We are interested in the applications you develop with our products, and we want to help if you have problems with them. To make it easy for you to contact us, this manual contains comment and configuration forms for you to complete. These forms are in Appendix D, Customer Communication, at the end of this manual.

PCI-DIO-96 User Manual xii

National Instruments Corporation

Chapter

Introduction

This chapter describes the PCI-DIO-96; lists what you need to get started, software programming choices, optional equipment; describes custom cabling options; and explains how to unpack the PCI-DIO-96.

About the PCI-DIO-96

Thank you for purchasing a National Instruments PCI-DIO-96 board. The PCI-DIO-96 is a 96-bit, parallel, digital I/O interface for PCI bus computers. Four 82C55A programmable peripheral interface (PPI) chips control the 96 bits of TTL-compatible digital I/O. The four OKI Semiconductor 82C55A PPI chips can operate in unidirectional mode, bidirectional mode, or handshaking mode and can generate interrupt requests to your computer. You can program the 82C55A for almost any 8-bit or 16-bit digital I/O application. The OKI Semiconductor 82C53 counter/timer chip has two usable counters that can generate timed interrupt requests to your computer. The digital I/O lines are all accessible through a 100-pin female connector.

The PCI-DIO-96 is a completely switchless and jumperless DAQ board. All resource allocation is completed automatically at startup, so you will not need to set interrupt levels or base addresses for the PCI-DIO-96.

You can use the PCI-DIO-96 in a wide range of digital I/O applications. For example, you can connect the PCI-DIO-96 to any of the following: panel meters, instruments and test equipment with BCD readouts and/or controls, or optically isolated, solid-state relays and I/O module mounting racks.

With the PCI-DIO-96, you can use your computer as a digital I/O system controller for laboratory testing, production testing, and industrial process monitoring and control.

Detailed PCI-DIO-96 specifications are in Appendix A, Specifications.

National Instruments Corporation 1-1 PCI-DIO-96 User Manual

Chapter 1 Introduction

What You Need to Get Started

To set up and use your PCI-DIO-96 board, you will need the following:

❑ PCI-DIO-96 board ❑ PCI-DIO-96 User Manual ❑ One of the following software packages and documentation:

ComponentWorks LabVIEW for Macintosh LabVIEW for Windows LabWindows/CVI for Windows NI-DAQ for Macintosh NI-DAQ for PC Compatibles

❑ Your computer

Software Programming Choices

There are several options to choose from when programming your National Instruments DAQ hardware. You can use LabVIEW, LabWindows/CVI, ComponentWorks, or other application development environments with the NI-DAQ instrument driver, or you can register-level program.

National Instruments Application Software

ComponentWorks contains tools for data acquisition and instrument control built on NI-DAQ driver software. ComponentWorks provides a higher-level programming interface for building virtual instruments through standard OLE controls and DLLs. With ComponentWorks, you can use all of the configuration tools, resource management utilities, and interactive control utilities included with NI-DAQ.

LabVIEW features interactive graphics, a state-of-the-art user interface, and a powerful graphical programming language. The LabVIEW Data Acquisition VI Library, a series of VIs for using LabVIEW with National Instruments DAQ hardware, is included with LabVIEW. The LabVIEW Data Acquisition VI Library is functionally equivalent to the NI-DAQ software.

PCI-DIO-96 User Manual 1-2

National Instruments Corporation

LabWindows/CVI features interactive graphics, a state-of-the-art user interface, and uses the ANSI standard C programming language. The LabWindows/CVI Data Acquisition Library, a series of functions for using LabWindows/CVI with National Instruments DAQ hardware, is included with the NI-DAQ software kit. The LabWindows/CVI Data Acquisition Library is functionally equivalent to the NI-DAQ software.

Using ComponentWorks, LabVIEW, or LabWindows/CVI software will greatly reduce the development time for your data acquisition and control application.

NI-DAQ Driver Software

The NI-DAQ driver software is included at no charge with all National Instruments DAQ hardware. NI-DAQ is not included with SCXI or accessory products, except the SCXI-1200. NI-DAQ has an extensive library of functions that you can call from your application programming environment. These functions include routines for analog input (A/D conversion), buffered data acquisition (high-speed A/D conversion), analog output (D/A conversion), waveform generation (timed D/A conversion), digital I/O, counter/timer operations, SCXI, RTSI, self-calibration, messaging, and acquiring data to memory.

Chapter 1 Introduction

NI-DAQ has both high-level DAQ I/O functions for maximum ease of use and low-level DAQ I/O functions for maximum flexibility and performance. Examples of high-level functions are streaming data to disk or acquiring a certain number of data points. An example of a low-level function is writing directly to registers on the DAQ device. NI-DAQ does not sacrifice the performance of National Instruments DAQ devices because it lets multiple devices operate at their peak performance.

NI-DAQ also internally addresses many of the complex issues between the computer and the DAQ hardware such as programming interrupts and DMA controllers. NI-DAQ maintains a consistent software interface among its different versions so that you can change platforms with minimal modifications to your code. Whether you are using conventional programming languages, ComponentWorks, LabVIEW, or LabWindows/CVI, your application uses the NI-DAQ driver software, as illustrated in Figure 1-1.

National Instruments Corporation 1-3 PCI-DIO-96 User Manual

Chapter 1 Introduction

Programming Environment

SCXI Hardware

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

Register-Level Programming

The final option for programming any National Instruments DAQ hardware is to write register-level software. Writing register-level programming software can be very time-consuming and inefficient, and is not recommended for most users.

Conventional 

 

DAQ or

ComponentWorks,

NI-DAQ

Driver Software

NI-DAQ, and Your Hardware



LabVIEW, or

LabWindows/CVI

 

Personal 

Computer or 

Workstation

Even if you are an experienced register-level programmer, consider using NI-DAQ or other National Instruments application software to program your National Instruments DAQ hardware. Using NI-DAQ, ComponentWorks, LabVIEW, or LabWindows/CVI software is easier than, and as flexible as, register-level programming, and can save weeks of development time.

PCI-DIO-96 User Manual 1-4

National Instruments Corporation

Optional Equipment

National Instruments offers a variety of products to use with your PCI-DIO-96 board, including cables, connector blocks, and other accessories, as follows:

• Cables and cable assemblies

• Connector blocks, 50-pin screw terminals

• SCXI modules and accessories for isolating, amplifying, exciting, and multiplexing signals for relays and analog output. With SCXI you can condition and acquire up to 3,072 channels.

• Low channel count signal conditioning modules, boards, and accessories, including conditioning for strain gauges and RTDs, simultaneous sample and hold, and relays

For more information about optional equipment available from National Instruments, refer to your National Instruments catalog or call the office nearest you.

Custom Cabling

Chapter 1 Introduction

National Instruments offers cables and accessories for you to prototype your application or to use if you frequently change board interconnections.

If you want to develop your own cable, the mating connector for the PCI-DIO-96 is a 100-position, right-angle receptacle without board locks. Recommended manufacturer part numbers for this mating connector are as follows:

• AMP Corporation (part number 749076-9)

• Honda Corporation (part number PCS-XE100LFD-HS)

National Instruments Corporation 1-5 PCI-DIO-96 User Manual

Chapter 1 Introduction

Unpacking

Your PCI-DIO-96 board is shipped in an antistatic package to prevent electrostatic damage to the board. Electrostatic discharge can damage several components on the board. To avoid such damage in handling the board, take the following precautions.

• Ground yourself via a grounding strap or by holding a grounded object.

• Touch the antistatic package to a metal part of your computer chassis before removing the board from the package.

• Remove the board from the package and inspect the board for loose components or any other sign of damage. Notify National Instruments if the board appears damaged in any way. Do not install a damaged board into your computer.

• Never touch the exposed pins of connectors.

PCI-DIO-96 User Manual 1-6

National Instruments Corporation

Installation and

Chapter

Configuration

This chapter describes how to install and configure your PCI-DIO-96 board.

Software Installation

If you are using NI-DAQ, ComponentWorks, LabWindows/CVI, or LabVIEW, refer to the installation instructions in your documentation to install and configure your software.

If you are a register-level programmer, refer to Chapter 5, Register Map and Description, and Chapter 6, Programming, of this manual.

Hardware Installation

The PCI-DIO-96 can be installed in any unused PCI expansion slot in your computer.

The following are general installation instructions. Consult your computer user manual or technical reference manual for specific instructions and warnings.

1. Turn off your computer.

2. Remove the top cover or access port to the I/O channel.

3. Remove the expansion slot cover on the back panel of the computer.

4. Insert the PCI-DIO-96 in an unused 5 V PCI slot. The fit may be tight, but do not force the board into place.

5. Screw the PCI-DIO-96 mounting bracket to the back panel rail of the computer, or use the slot side tabs, if available, to secure the PCI-DIO-96 in place.

6. Replace the computer cover.

The PCI-DIO-96 board is installed. You are now ready to configure your hardware.

National Instruments Corporation 2-1 PCI-DIO-96 User Manual

Chapter 2 Installation and Conﬁguration

Board Configuration

The PCI-DIO-96 is completely software configurable. The PCI-DIO-96 is fully compliant with the PCI Local Bus Specification, Revision 2.0. Therefore, all board resources are automatically allocated by the PCI system, including the base address and interrupt level. The base address for the PCI-DIO-96 is mapped into PCI memory space. You do not need to perform any configuration steps after the system powers up.

PCI-DIO-96 User Manual 2-2

National Instruments Corporation

Chapter

Signal Connections

This chapter describes how to make input and output signal connections to your PCI-DIO-96 via the board I/O connector.

I/O Connector

The I/O connector for the PCI-DIO-96 has 100 pins that you can connect to 50-pin accessories with the R1005050 cable.

Warning: Connections that exceed any of the maximum ratings of input or output

I/O Connector Pin Descriptions

signals on the PCI-DIO-96 can damage the PCI-DIO-96 board and your computer. The description of each signal in this chapter includes information about maximum input ratings. National Instruments is NOT liable for any damages resulting from signal connections that exceed these maximum ratings.

Figures 3-1 and 3-2 show the pin assignments for the PCI-DIO-96 digital I/O connector using the R1005050 ribbon cable.

See Table 3-1 for descriptions of each pin on the I/O connector.

National Instruments Corporation 3-1 PCI-DIO-96 User Manual

Chapter 3 Signal Connections

APC7 APC6

APC5

APC4

APC3

APC2 APC1 APC0

APB7

APB6

APB5

APB4

APB3

APB2

APB1

APB0

APA7 APA6

APA5

APA4 APA3

APA2

APA1 APA0

+5 V

12 34 56 78

910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

BPC7 BPC6 BPC5 BPC4 BPC3 BPC2 BPC1 BPC0

BPB7 BPB6

BPB5 BPB4 BPB3 BPB2 BPB1 BPB0 BPA7 BPA6 BPA5 BPA4 BPA3 BPA2 BPA1 BPA0 GND

Figure 3-1. PCI-DIO-96 Cable-Assembly Connector Pinout for Pins 1 through 50

with the R1005050 Ribbon Cable

PCI-DIO-96 User Manual 3-2

National Instruments Corporation

Chapter 3 Signal Connections

CPC7 CPC6

CPC5

CPC4 CPC3

CPC2 CPC1 CPC0

CPB7

CPB6

CPB5 CPB4 CPB3 CPB2

CPB1 CPB0

CPA7

CPA6 CPA5

CPA4

CPA3

CPA2

CPA1

CPA0

+5 V

51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

DPC7 DPC6 DPC5 DPC4 DPC3 DPC2 DPC1 DPC0

DPB7 DPB6

DPB5 DPB4 DPB3 DPB2 DPB1 DPB0 DPA7 DPA6 DPA5 DPA4 DPA3 DPA2 DPA1 DPA0 GND

Figure 3-2. PCI-DIO-96 Cable-Assembly Connector Pinout for Pins 51 through 100

with the R1005050 Ribbon Cable

National Instruments Corporation 3-3 PCI-DIO-96 User Manual

Chapter 3 Signal Connections

Table 3-1. Signal Descriptions for PCI-DIO-96 I/O Connector Pins

Pin Signal Name Description

Table 3-1 lists the signal descriptions for the PCI-DIO-96 I/O connector pins.

1, 3, 5, 7, 9, 11, 13, 15

2, 4, 6, 8, 10, 12, 14, 16

17, 19, 21, 23, 25, 27, 29, 31

18, 20, 22, 24, 26, 28, 30, 32

33, 35, 37, 39, 41, 43, 45, 47

34, 36, 38, 40, 42, 44, 46, 48

APC<7..0> Bidirectional data lines for port C of PPI A—APC7 is the

MSB, APC0 the LSB.

BPC<7..0> Bidirectional data lines for port C of PPI B—BPC7 is the

MSB, BPC0 the LSB.

APB<7..0> Bidirectional data lines for port B of PPI A—APB7 is the

MSB, APB0 the LSB.

BPB<7..0> Bidirectional data lines for port B of PPI B—BPB7 is the

MSB, BPB0 the LSB.

APA<7..0> Bidirectional data lines for port A of PPI A—APA7 is the

MSB, APA0 the LSB.

BPA<7..0> Bidirectional data lines for port A of PPI B—BPA7 is the

MSB, BPA0 the LSB.

49, 99 +5 V supply +5 Volts—These pins are fused for up to 1 A total of +4.65

to +5.25 V.

50, 100 GND Ground—These pins are connected to the computer ground

signal.

51, 53, 55, 57, 59, 61, 63, 65

CPC<7..0> Bidirectional data lines for port C of PPI C—CPC7 is the

MSB, CPC0 the LSB.

52, 54, 56, 58, 60, 62, 64, 66

67, 69, 71, 73, 75, 77, 79, 81

68, 70, 72, 74, 76, 78, 80, 82

PCI-DIO-96 User Manual 3-4

DPC<7..0> Bidirectional data lines for port C of PPI D—DPC7 is the

MSB, DPC0 the LSB.

CPB<7..0> Bidirectional data lines for port B of PPI C—CPB7 is the

MSB, CPB0 the LSB.

DPB<7..0> Bidirectional data lines for port B of PPI D—DPB7 is the

MSB, DPB0 the LSB.

National Instruments Corporation

Table 3-1. Signal Descriptions for PCI-DIO-96 I/O Connector Pins (Continued)

Pin Signal Name Description

Chapter 3 Signal Connections

83, 85, 87, 89, 91, 93, 95, 97

84, 86, 88, 90, 92, 94, 96, 98

CPA<7..0> Bidirectional data lines for port A of PPI C—CPA7 is the

MSB, CPA0 the LSB.

DPA<7..0> Bidirectional data lines for port A of PPI D—DPA7 is the

MSB, DPA0 the LSB.

Port C Pin Assignments

The signals assigned to port C depend on how the 82C55A is configured. In mode 0, or no handshaking configuration, port C is configured as two 4-bit I/O ports. In modes 1 and 2, or handshaking configuration, port C is used for status and handshaking signals with zero, two, or three lines available for general-purpose I/O. Table 3-2 summarizes the port C signal assignments for each configuration. Consult Chapter 6, Programming, for register-level programming information.

Note: Table 3-2 shows both the port C signal assignments and the terminology

correlation between different documentation sources. The 82C55A terminology refers to the different 82C55A configurations as modes whereas NI-DAQ, ComponentWorks, LabWindows/CVI, and LabVIEW documentation refers to them as handshaking and no handshaking. These signal assignments are the same for all four 82C55A PPIs. Refer to Port Identification in Chapter 6, Programming, for more information.

Table 3-2. Port C Signal Assignments

Configuration Terminology Signal Assignments

National

82C55A/

PCI-DIO-96 User Manual

Mode 0 (Basic I/O)

Mode 1 (Strobed Input)

National Instruments Corporation 3-5 PCI-DIO-96 User Manual

Instruments

Software

No Handshaking

Handshaking I/O I/O IBF

APC7,

BPC7,

CPC7,

DPC7

I/O I/O I/O I/O I/O I/O I/O I/O

APC6,

BPC6,

CPC6,

DPC6

APC5, BPC5, CPC5,

DPC5

APC4, BPC4, CPC4,

DPC4

STBA* INTRASTBB* IBFBBINTR

APC3, BPC3, CPC3,

DPC3

APC2, BPC2, CPC2,

DPC2

APC1, BPC1, CPC1,

DPC1

APC0, BPC0, CPC0,

DPC0

Chapter 3 Signal Connections

Table 3-2. Port C Signal Assignments (Continued)

Configuration Terminology Signal Assignments

National

82C55A/

PCI-DIO-96

User Manual

Mode 1 (Strobed Output)

Mode 2 (Bidirectional Bus)

*Indicates that the signal is active low.

Subscripts A and B denote port A or port B handshaking signals.

Instruments

Software

Handshaking OBFA* ACKA* I/O I/O INTRAACKB* OBFB* INTR

Handshaking OBFA* ACKA* IBF

APC7,

BPC7,

CPC7,

DPC7

APC6, BPC6, CPC6,

DPC6

APC5, BPC5, CPC5,

DPC5

Digital I/O Signal Connections

Pins 1 through 48 and pins 51 through 98 of the I/O connector are digital I/O signal pins. The following specifications and ratings apply to the digital I/O lines.

• Absolute maximum voltage rating -0.5 to +5.5 V with

• Digital input specifications (referenced to GND): – Input logic high

voltage

– Input logic low

voltage

– Maximum input

current (0 < Vin < 5 V)

APC4, BPC4, CPC4,

DPC4

STBA* INTRAI/O I/O I/O

APC3, BPC3, CPC3,

DPC3

APC2, BPC2, CPC2,

DPC2

respect to GND

2.2 V minimum 5.3 V maximum

-0.3 V minimum 0.8 V maximum

-1 µA minimum 1 µA maximum

APC1, BPC1, CPC1,

DPC1

APC0,

BPC0,

CPC0,

DPC0

• Digital output specifications (referenced to GND): – Output logic high

voltage at

– Output logic low

voltage

PCI-DIO-96 User Manual 3-6

3.7 V minimum I

= -2.5 mA

out

— 0.4 V maximum at

—

= 2.5 mA

out

National Instruments Corporation

LED

Chapter 3 Signal Connections

Figure 3-3 depicts signal connections for three typical digital I/O applications.

+5 V

PPI A Port A



APA<3..0>

PPI C

Port B



CPB<7..4>

PCI-DIO-96 Board

Switch

I/O Connector

43 45 47 67 69

TTL Signal

71 73

50, 100

GND

Figure 3-3. Digital I/O Connections Block Diagram

In Figure 3-3, PPI A, port A, is configured for digital output, and PPI C, port B, is configured for digital input. Digital input applications include receiving TTL signals and sensing external device states such as the state of the switch in Figure 3-3. Digital output applications include sending TTL signals and driving external devices such as the LED shown in Figure 3-3.

National Instruments Corporation 3-7 PCI-DIO-96 User Manual

Chapter 3 Signal Connections

Power Connections

Pins 49 and 99 of the I/O connector supply +5 V from the computer’s power supply via a self-resetting fuse. The fuse will reset automatically within a few seconds after the overcurrent condition is removed. These pins are referenced to GND and can be used to power external digital circuitry. For more information on these output pins, see Appendix A, Specifications.

• Power rating 1 A at +4.65 to +5.25 V

Warning: Under no circumstances should you connect these +5 V power pins directly

to ground or to any other voltage source on the PCI-DIO-96 or any other device. Doing so can damage the PCI-DIO-96 and the computer. National Instruments is

Timing Specifications

This section lists the timing specifications for handshaking with the PCI-DIO-96. The handshaking lines STB* and IBF synchronize input transfers. The handshaking lines OBF* and ACK* synchronize output transfers.

Table 3-3 describes the connector pins on the PCI-DIO-96 I/O connector by pin number and gives the signal name and description of each signal connector pin.

NOT liable for damage resulting from such a connection.

Table 3-3. Signal Names Used in Timing Diagrams

Name Type Description

STB* Input Strobe Input—A low signal on this handshaking line loads data

into the input latch.

IBF Output Input Buffer Full—A high signal on this handshaking line

indicates that data has been loaded into the input latch. This is an input acknowledge signal.

ACK* Input Acknowledge Input—A low signal on this handshaking line

indicates that the data written to the port has been accepted. This signal is a response from the external device indicating that it has received the data from the PCI-DIO-96.

OBF* Output Output Buffer Full—A low signal on this handshaking line

indicates that data has been written to the port.

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National Instruments Corporation

Chapter 3 Signal Connections

Table 3-3. Signal Names Used in Timing Diagrams (Continued)

Name Type Description

INTR Output Interrupt Request—This signal becomes high when the

82C55A requests service during a data transfer. The appropriate interrupt enable bits must be set to generate this signal.

RD* Internal Read—This signal is the read signal generated from the control

lines of the computer I/O expansion bus.

WR* Internal Write —This signal is the write signal generated from the

control lines of the computer I/O expansion bus.

DATA Bidirectional Data Lines at the Specified Port—This signal indicates the

availability of data on the data lines at a port that is in the output mode. If the port is in the input mode, this signal indicates when the data on the data lines should be valid.

National Instruments Corporation 3-9 PCI-DIO-96 User Manual

Chapter 3 Signal Connections

Mode 1 Input Timing

The timing specifications for an input transfer in mode 1 are as follows:

STB *

IBF

INTR

RD *

DATA

Name Description Minimum Maximum

T1 T2 T3 T4 T5 T6 T7

STB* Pulse Width STB* = 0 to IBF = 1 Data before STB* = 1 STB* = 1 to INTR = 1 Data after STB* = 1 RD* = 0 to INTR = 0 RD* = 1 to IBF = 0

100 —

— 150 20 — — 150 50 — — 200 — 150

All timing values are in nanoseconds.

Figure 3-4. Timing Specifications for Mode 1 Input Transfer

PCI-DIO-96 User Manual 3-10

National Instruments Corporation

WR*

OBF*

INTR

ACK*

DATA

Chapter 3 Signal Connections

Mode 1 Output Timing

The timing specifications for an output transfer in mode 1 are as follows:

Name Description Minimum Maximum

T1 T2 T3 T4 T5 T6

WR* = 0 to INTR = 0 WR* = 1 to Output WR* = 1 to OBF* = 0 ACK* = 0 to OBF* = 1 ACK* Pulse Width ACK* = 1 to INTR = 1

— 250 — 200 — 150 — 150

100 —

— 150

All timing values are in nanoseconds.

Figure 3-5. Timing Specifications for Mode 1 Output Transfer

National Instruments Corporation 3-11 PCI-DIO-96 User Manual

Chapter 3 Signal Connections

Mode 2 Bidirectional Timing

The timing specifications for bidirectional transfers in mode 2 are as follows:

WR *

OBF *

INTR

ACK *

STB *

IBF

RD *

DATA

Name Description Minimum Maximum

T1 T2 T3 T4 T5 T6 T7 T8 T9

T10

WR* = 1 to OBF* = 0 Data before STB* = 1 STB* Pulse Width STB* = 0 to IBF = 1 Data after STB* = 1 ACK* = 0 to OBF* = 1 ACK* Pulse Width ACK* = 0 to Output ACK* = 1 to Output Float RD* = 1 to IBF = 0

— 150 20 —

100 —

— 150 50 — — 150

100 —

— 150 20 250 — 150

All timing values are in nanoseconds.

T10

Figure 3-6. Timing Specifications for Mode 2 Bidirectional Transfer

PCI-DIO-96 User Manual 3-12

National Instruments Corporation

Chapter

Theory of Operation

This chapter contains a functional overview of the PCI-DIO-96 and explains the operation of each functional unit comprising the PCI-DIO-96.

Functional Overview

The block diagram in Figure 4-1 illustrates the key functional components of the PCI-DIO-96 board.

National Instruments Corporation 4-1 PCI-DIO-96 User Manual

Chapter 4 Theory of Operation

Data/Address

Interface Control

Error Reporting

Arbitration

System

PCI

Interrupt

+5 VDC

Port A

82C55A

PPI A

Interrupt

Interrupt

Data

Bus

82C55A

PPI B

82C55A

PPI C

82C55A

PPI D

82C53

Timer

MITE

PCI

Interface

Circuitry

Interrupt

Control

Circuitry

Port B

Port C

Port A Port B

Port C

Port A Port B

Port C

Port A Port B

Port C

8 8 8

I/O Connector

8 8 8

1 A Fuse

Figure 4-1. PCI-DIO-96 Block Diagram

PCI Interface Circuitry

The PCI-DIO-96 uses the MITE ASIC to communicate with the PCI bus. The MITE ASIC was designed by National Instruments specifically for data acquisition. The PCI-DIO-96 is fully compliant with Local Bus Specification 2.0.

The base memory address and interrupt level for the board are stored inside the MITE at power on. You do not need to set any switches or jumpers.

PCI-DIO-96 User Manual 4-2

National Instruments Corporation

82C55A Programmable Peripheral Interface

The four 82C55A PPI chips are the heart of the PCI-DIO-96. Each of these chips has 24 programmable I/O pins that represent three 8-bit ports: PA, PB, and PC. Each port can be programmed as an input or output port. The 82C55A has three modes of operation: simple I/O (mode 0), strobed I/O (mode 1), and bidirectional I/O (mode 2). In modes 1 and 2, the three ports are divided into two groups: group A and group B. Each group has eight data bits and four control and status bits from port C (PC). Modes 1 and 2 use handshaking signals from the computer to synchronize data transfers. Refer to Chapter 6, Programming, or to Appendix B, MSM82C55A Data Sheet, for more detailed information.

82C53 Programmable Interval Timer

The 82C53 programmable interval timer generates timed interrupt requests to your computer. The 82C53 has three 16-bit counters, which can each be used in one of six different modes. The PCI-DIO-96 uses two of the counters to generate interrupt requests; the third counter is not used and is not accessible. Refer to Chapter 5, Register Map and Description, or to Appendix C, MSM82C53 Data Sheet, for more detailed information.

Chapter 4 Theory of Operation

Interrupt Control Circuitry

Two software-controlled registers determine which devices, if any, generate interrupts. Each of the four 82C55A devices has two interrupt lines, PC3 and PC0, connected to the interrupt circuitry. The 82C53 device has two of its three counter outputs connected to the interrupt circuitry. Any of these 10 signals can interrupt the computer if the interrupt circuitry is enabled and the corresponding enable bit is set. See Chapter 5, Register Map and Description, for more information. Normally, the handshaking circuitry controls PC3 and/or PC0 of the 82C55A devices; however, you can configure either of these two lines for input and then use them as external interrupts. An interrupt occurs on the signal line low-to-high transition.

Refer to Chapter 5, Register Map and Description, Chapter 6,

Programming, Appendix B, MSM82C55A Data Sheet, or Appendix C, MSM82C53 Data Sheet, for more detailed information concerning

interrupts.

National Instruments Corporation 4-3 PCI-DIO-96 User Manual

Chapter 4 Theory of Operation

The block diagram in Figure 4-2 illustrates the PCI-DIO-96 interrupt control circuitry.

82C53

Counter/Timer

2 MHz

+5 V

CLK0

GATE0 CLK1

GATE1 CLK2

GATE2

OUT0

OUT1

OUT2

82C55A

PPI A

82C55A

PPI B

82C55A

PPI C

82C55A

PPI D

PC3 PC0

PCI Interrupt

Interrupt

Control

Circuitry

Figure 4-2. PCI-DIO-96 Interrupt Control Circuitry Block Diagram

PCI-DIO-96 User Manual 4-4

PCI-DIO-96

Interrupt Control Registers

National Instruments Corporation

Chapter

Description

Note: If you plan to use a programming software package such as

ComponentWorks, LabVIEW, LabWindows/CVI, or NI-DAQ with your PCI-DIO-96 board, you need not read this chapter.

Introduction

This chapter describes in detail the address and function of each PCI-DIO-96 register.

The three 8-bit ports of the 82C55A are divided into two groups of 12 signals: group A and group B. One 8-bit control word selects the mode of operation for each group. The group A control bits configure port A (A<7..0>) and the upper 4 bits (nibble) of port C (C<7..4>). The group B control bits configure port B (B<7..0>) and the lower nibble of port C (C<3..0>). These configuration bits are defined in the section Register Description for the 82C55A later in this chapter. Because there are four 82C55A PPI devices on the board, they are referenced as PPI A, PPI B, PPI C, and PPI D when differentiation is required.

The three 16-bit counters of the 82C53 are accessed through individual data ports and controlled by one 8-bit control word. The control word selects how the counter data ports are accessed and what mode the counter uses. The configuration bits are defined in the section Register Description for the 82C53 later in this chapter.

In addition to the 82C55A and 82C53 devices, there are two registers that select which onboard signals are capable of generating interrupts. There are two interrupt signals from each of the four 82C55A devices and two interrupt signals from the 82C53 device. Individual enable bits select which of these 10 signals can generate interrupts. Also, a master enable signal determines whether the board can actually send a request to the computer. The configuration bits for these registers are defined in the section Register Description for the Interrupt Control Registers later in this chapter.

National Instruments Corporation 5-1 PCI-DIO-96 User Manual

Chapter 5 Register Map and Description

Register Map

Table 5-1 lists the address map for the PCI-DIO-96.

Table 5-1. PCI-DIO-96 Address Map

82C55A Register Group

PPI A

PORTA Register PORTB Register PORTC Register Configuration Register

PPI B

PORTA Register PORTB Register PORTC Register Configuration Register

PPI C

PORTA Register PORTB Register PORTC Register Configuration Register

PPI D

PORTA Register PORTB Register PORTC Register Configuration Register

(Hex)

00 01 02 03

04 05 06 07

09 0A 0B

0C 0D

Size Type

8-bit 8-bit 8-bit 8-bit

Read-and-write Read-and-write Read-and-write Write-only

PCI-DIO-96 User Manual 5-2

National Instruments Corporation

Chapter 5 Register Map and Description

Table 5-1. PCI-DIO-96 Address Map (Continued)

82C53 Register Group

PORTA Register PORTB Register PORTC Register Configuration Register

Interrupt Control Register Group

Register Descriptions

The register descriptions for the devices used on the PCI-DIO-96 are given on the pages that follow. The register description bits labeled with an X indicate don’t care bits. Always write a 0 to these bits.

Register Description Format

The remainder of this section discusses each of the PCI-DIO-96 registers in the order shown in Table 5-1. Each register group is introduced, followed by a detailed bit description of each register. Individual register descriptions give the address (in hexadecimal), type, data size, and bit map of the register, followed by a description of each bit.

(Hex)

10 11 12 13

14 15 16

Size Type

8-bit 8-bit 8-bit 8-bit

8-bit 8-bit 8-bit

Read-and-write Read-and-write Read-and-write Write-only

Write-only Write-only Write-only

The register bit map shows a diagram of the register with the MSB (bit 7) shown on the left, and the LSB (bit 0) shown on the right. A rectangle with the bit name inside represents each bit.

The bit map for the Interrupt Clear Register states not applicable, no bits used. The data is ignored when you write to this register; therefore, any bit pattern will suffice.

Register Description for the 82C55A

Figure 5-1 shows the two control word formats used to completely program the 82C55A. The control word flag (bit 7) determines which control word format is being programmed. When the control word flag

National Instruments Corporation 5-3 PCI-DIO-96 User Manual

Chapter 5 Register Map and Description

is 1, bits 6 through 0 select the I/O characteristics of the 82C55A ports. These bits also select the mode in which the ports are operating; that is, mode 0, mode 1, or mode 2. When the control word flag is 0, bits 3 through 0 select the bit set/reset format of port C.

D7 D6 D5 D4 D3 D2 D1 D0

Group A Group B

Control Word Flag

1 = Mode Set

Mode Selection

00 = Mode 0 01 = Mode 1 1X = Mode 2

Port A

1 = Input

0 = Output

Port C

(high nibble) 1 = Input 0 = Output

Control Word Flag

0 = Bit Set/Reset

Unused

Port C

(low nibble) 1 = Input 0 = Output

Port B

1 = Input 0 = Output

Mode Selection

0 = Mode 0 1 = Mode 1

a. Control Word Flag, Mode Set (bit 7 = 1)

D7 D6 D5 D4 D3 D2 D1 D0

Bit Set/Reset

1 = Set 0 = Reset

Bit Select

(000) (001) (010) : : (111)

b. Control Word Flag, Bit Set/Reset (bit 7 = 0)

Figure 5-1. Control Word Formats for the 82C55A

PCI-DIO-96 User Manual 5-4

National Instruments Corporation

Chapter 5 Register Map and Description

Table 5-2 shows the control words for setting or resetting each bit in port C. Notice that bit 7 of the control word is cleared when programming the set/reset option for the bits of port C.

Table 5-2. Port C Set/Reset Control Words

Bit Number Bit Set

Control Word

0 0xxx0001 0xxx0000 xxxxxxxb

1 0xxx0011 0xxx0010 xxxxxxbx

2 0xxx0101 0xxx0100 xxxxxbxx

3 0xxx0111 0xxx0110 xxxxbxxx

4 0xxx1001 0xxx1000 xxxbxxxx

5 0xxx1011 0xxx1010 xxbxxxxx

6 0xxx1101 0xxx1100 xbxxxxxx

7 0xxx1111 0xxx1110 bxxxxxxx

Register Description for the 82C53

Figure 5-2 shows the control word format used to completely program the 82C53. Bits 7 and 6 of the control word select the counter to be programmed. Bits 5 and 4 select the mode by which the count data is written to and read from the selected counter. Bits 3, 2, and 1 select the mode for the selected counter. Bit 0 selects whether the counter counts in binary or BCD format.

Bit Reset

Control Word

Bit Set or Reset

in Port C

National Instruments Corporation 5-5 PCI-DIO-96 User Manual

Chapter 5 Register Map and Description

D7 D6 D5 D4 D3 D2 D1 D0

Counter Select

00 = Counter 0 01 = Counter 1 10 = Counter 2 11 = Illegal

Access Mode

00 = Latch counter value 01 = Access LSB only 10 = Access MSB only 11 = Access LSB, then MSB

BCD

1 = Count in BCD 0 = Count in Binary

100 = Mode 4 101 = Mode 5 110 = Mode 2 111 = Mode 3

Figure 5-2. Control Word Format for the 82C53

There are two interrupt control registers on the PCI-DIO-96. One of these registers has individual enable bits for the two interrupt lines from each of the 82C55A devices. The other register has a master interrupt enable bit and two bits for the timed interrupt circuitry. Of the latter two bits, one bit enables counter interrupts, while the other selects counter 0 or counter 1. The bit maps and signal definitions are listed in this chapter.

Mode Select

000 = Mode 0 001 = Mode 1 010 = Mode 2 011 = Mode 3

PCI-DIO-96 User Manual 5-6

National Instruments Corporation

Chapter 5 Register Map and Description

Interrupt Control Register 1

Address: Base address + 14 (hex) Type: Write-only Word Size: 8-bit Bit Map:

7 6 5 4 3 2 1 0

DIRQ1 DIRQ0 CIRQ1 CIRQ0 BIRQ1 BIRQ0 AIRQ1 AIRQ0

Bit Name Description

7 DIRQ1 PPI D Port B Interrupt Enable Bit—If this bit and the

INTEN bit in Interrupt Control Register 2 are both set, PPI D sends an interrupt, INTRB, to the computer. If this bit is cleared, PPI D does not send the interrupt INTRB to the computer, regardless of the setting of INTEN.

6 DIRQ0 PPI D Port A Interrupt Enable Bit—If this bit and

the INTEN bit in Interrupt Control Register 2 are both set, PPI D sends an interrupt, INTRA, to the computer. If this bit is cleared, PPI D does not send the interrupt INTRA to the computer, regardless of the setting of INTEN.

5 CIRQ1 PPI C Port B Interrupt Enable Bit—If this bit and the

INTEN bit in Interrupt Control Register 2 are both set, PPI C sends an interrupt, INTRB, to the computer. If this bit is cleared, PPI C does not send the interrupt INTRB to the computer, regardless of the setting of INTEN.

4 CIRQ0 PPI C Port A Interrupt Enable Bit—If this bit and the

INTEN bit in Interrupt Control Register 2 are both set, PPI C sends an interrupt, INTRA, to the computer. If this bit is cleared, PPI C does not send the interrupt INTRA to the computer, regardless of the setting of INTEN.

National Instruments Corporation 5-7 PCI-DIO-96 User Manual

Chapter 5 Register Map and Description

Bit Name Description (Continued)

3 BIRQ1 PPI B Port B Interrupt Enable Bit—If this bit and the

2 BIRQ0 PPI B Port A Interrupt Enable Bit—If this bit and the

1 AIRQ1 PPI A Port B Interrupt Enable Bit—If this bit and the

0 AIRQ0 PPI A Port A Interrupt Enable Bit—If this bit and

INTEN bit in Interrupt Control Register 2 are both set, PPI B sends an interrupt, INTRB, to the computer. If this bit is cleared, PPI B does not send the interrupt INTRB to the computer, regardless of the setting of INTEN.

INTEN bit in Interrupt Control Register 2 are both set, PPI B sends an interrupt, INTRA, to the computer. If this bit is cleared, PPI B does not send the interrupt INTRA to the computer, regardless of the setting of INTEN.

INTEN bit in Interrupt Control Register 2 are both set, PPI A sends an interrupt, INTRB, to the computer. If this bit is cleared, PPI A does not send the interrupt INTRB to the computer, regardless of the setting of INTEN.

the INTEN bit in Interrupt Control Register 2 are both set, PPI A sends an interrupt, INTRA, to the computer. If this bit is cleared, PPI A does not send the interrupt INTRA to the computer, regardless of the setting of INTEN.

PCI-DIO-96 User Manual 5-8

National Instruments Corporation

Chapter 5 Register Map and Description

Interrupt Control Register 2

Address: Base address + 15 (hex) Type: Write-only Word Size: 8-bit Bit Map:

7 6 5 4 3 2 1 0

X X X X X INTEN CTRIRQ CTR1

Bit Name Description

7–3 X Don’t care bit. 2 INTEN Interrupt Enable Bit—If this bit is set, the

PCI-DIO-96 can interrupt the computer. If this bit is cleared, the PCI-DIO-96 cannot generate interrupts to the computer, regardless of the status of the bits in Interrupt Control Register 2.

1 CTRIRQ Counter Interrupt Enable Bit—If this bit is set, the

82C53 counter outputs can interrupt the computer. If this bit is cleared, the counter outputs have no effect.

0 CTR1 Counter Select Bit—If this bit is set, the output from

counter 1 of the 82C53 is connected to the interrupt request circuitry. In this mode, counter 0 of the 82C53 acts as a frequency scaler for counter 1, which generates the interrupt. If CTR1 is cleared, the output from counter 0 of the 82C53 is connected to the interrupt request circuitry. In this mode, counter 0 generates the interrupt. For more information, see the section Interrupt Programming Example for the 82C53 in Chapter 6, Programming.

National Instruments Corporation 5-9 PCI-DIO-96 User Manual

Chapter 5 Register Map and Description

Interrupt Clear Register

The interrupt clear register has no bits associated with it. Use this register to reset the state of the interrupt request signal once the interrupt routine has been entered. To clear the interrupt, perform an 8-bit write to this register address; the data is irrelevant.

Address: Base address + 16 (hex) Type: Write-only Word Size: 8-bit Bit Map:

7 6 5 4 3 2 1 0

X X X X X X X X

Bit Name Description

7–0 X Don’t care bit.

PCI-DIO-96 User Manual 5-10

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Chapter

Programming

This chapter contains instructions on how to operate the PCI-DIO-96 circuitry, and examples of the programming steps necessary to execute an operation. If you are not using NI-DAQ, you must first initialize your board. The initialization steps are unique for PC and Macintosh users, so refer to the section pertaining to your platform.

Programming the PCI-DIO-96 involves writing to and reading from registers on the board. You will find a listing of these registers in Chapter 5, Register Map and Description, of this manual.

PCl Local Bus

The PCI-DIO-96 is fully compatible with the PCI Local Bus Specification, Version 2.1, from the PCI Special Interest Group (SIG).

The PCI Local Bus is a high performance, 32-bit bus with multiplexed address and data lines. The PCI system arbitrates and assigns resources through software, freeing you from manually setting switches and jumpers. Bus-related resources must be configured before you attempt to execute a register-level program. This entails assigning a base address and interrupt channel to the PCI-DIO-96.

You can use PCI local bus boards on both PC-compatible and Macintosh computers. However, due to the differences in those systems, configuration will be different and performed through different versions of NI-DAQ.

Programming Examples

The programming examples in this section demonstrate the programming steps needed to perform several different operations. The instructions are language independent; that is, they tell you to read or write a given register or to detect if a given bit is set or cleared, without presenting the actual code. The information given is not intended to be used without proper modification in a practical solution.

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Note: In this chapter all numbers preceded by 0x are hexadecimal

Before you can implement any of the examples into a real application, you must know the base memory address for your board. To generate and process any interrupts, you must write and install an applicable interrupt service routine.

Common terms that you will see used in the programming examples are listed below:

Port A Address of PPI A Port A Register

(Base Address + 0x00)

Port B Address of PPI A Port B Register

(Base Address + 0x01)

Port C Address of PPI A Port C Register

(Base Address + 0x02)

8255Cnfg Address of PPI A Configuration

Ctr0 Address of 82C53 Counter 0 Register

Ctr1 Address of 82C53 Counter 1 Register

CntrCnfg Address of 82C53 Configuration

IREG1 Address of Interrupt Control Register 1

IREG2 Address of Interrupt Control Register 2

Write (address, data) Generic function call for a memory

Read (address) Generic function call for a memory

CWrite (offset, data) PCI configuration space write of data to

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(Base Address + 0x10)

(Base Address + 0x11)

(Base Address + 0x14)

(Base Address + 0x15)

space Write of data to address

space Read from address

PCI configuration space offset

National Instruments Corporation

PCI Initialization for the PC

To program at the register level without NI-DAQ, you must know the PCI-DIO-96 base memory address and install an interrupt handler to generate interrupts. Writing an interrupt handler is solely left to you and is not discussed in this manual. The PCI-DIO-96 uses the MITE Application Specific Integrated Circuit (ASIC) chip as the PCI bus interface. National Instruments designed this ASIC specifically for data acquisition. In order for the board to operate properly this chip must be configured. Ordinarily, NI-DAQ performs this function, but if you are not using NI-DAQ, then you must configure the MITE ASIC chip. The following sections explain how to accomplish this. The references made about PCI BIOS

In order to configure the MITE chip you must first write an algorithm that finds and stores all configuration information about the PCI-DIO-96. You can do this by using PCI BIOS calls to search PCI configuration space for the National Instruments vendor ID (0x1093) and PCI-DIO-96 device ID (0x0160). If a board is found, the algorithm stores all the board’s configuration information into a data structure. Base Address Register 0 (BAR0) corresponds to the base address of the MITE, while Base Address Register 1 (BAR1) is the base address of the board registers. The size of each of these windows is 4 KB. Both addresses will most likely be mapped above 1 MB in the memory map. This means that in order to communicate with the board you must know how to perform memory cycles to extended memory. Information is provided to re-map the board under 1 MB in the memory map, which makes communicating with the board simpler. PCI BIOS read and write calls are used to accomplish this. Use the pseudocode in this section to re-map the board below 1 MB. If you choose not to re-map the board, you must still perform Steps 4 and 5. All values in this example are 32 bits.

1. Write the address to which you want to re-map the MITE to PCI configuration space offset 0x10 (BAR0).

2. Write the value 0x0000aeae to offset 0x340 from the new MITE address.

3. Write the address to which you want to re-map the board to PCI configuration space offset 0x14 (BAR1).

Chapter 6 Programming

calls are left to you to implement.

1. You can obtain more information on PCI BIOS calls from the PCI SIG on the World Wide Web.

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4. Create the window data value by masking the new board address: window data value = ((0xffffff00 and new board address) or

(0x00000080))

If you are not remapping the board, then the new board address is the value in BAR1.

5. Write the window data value to offset 0xc0 from the new MITE

address. If you are not remapping the board, then the new MITE address is

the value in BAR0.

The following pseudocode re-maps the MITE to memory address 0xd0000 and the board to memory address 0xd1000.

CWrite(0x10, 0x000d0000) Write(0xd0340,0x0000aeae) CWrite(0x14,0x000d1000) Write(0xd00c0,0x000d1080)

The new base address for the PCI-DIO-96 would now be 0xd1000, for this example. It is important that the memory range to which you re-map the board is not being used by another device or system resource. You can exclude this memory from use with a memory manager.

PCI Initialization for the Macintosh

Programming Options

To program at the register level, you must know the PCI-DIO-96 base memory address and you must install an interrupt handler to generate interrupts. Both of these operations are difficult tasks. To make this process easier, National Instruments provides a driver toolkit and additional NI-DAQ functions to perform these operations.

You have three options to program the PCI-DIO-96. The following sections describe these options.

Using NI-DAQ and the Driver Toolkit

Included on the NI-DAQ installation media is a toolkit for creating plug-in drivers for most of the devices which NI-DAQ controls. Using this toolkit, you can write a plug-in driver for your PCI board, but continue to use NI-DAQ for any other boards that are installed in your

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system. When you develop a driver using the toolkit, your driver plug-in has access to all the information and support functions it needs to control the device and respond to interrupts. When you use the toolkit, your application is divided into two parts—a driver and an interface to the driver. You use the driver to control the hardware and the interface to control the driver. You can install the driver toolkit by launching the NI-DAQ installer, choosing the alternate installations option (see the installer for help), and dragging the toolkit icon to your disk. Documentation for the toolkit is included in the toolkit.

Performing Simple Accesses

To perform simple input and output using your PCI board without using the drivers included in NI-DAQ or writing your own drivers, you can use the board. If you want to use interrupts, you must work directly with the Macintosh Operating System (OS), and you could inadvertently corrupt portions of NI-DAQ. Therefore, National Instruments recommends this option only if you are not generating interrupts. If you need or want to use interrupts, either use the driver toolkit mentioned earlier or develop your own method.

Get_DAQ_Device_Info call to do simple accesses with the

Developing Your Own Interrupt Method

National Instruments does not support developing your own interrupt method. To do this, consult the following documents:

• Designing PCI Cards and Drivers for Power Macintosh Computers

• Inside Macintosh: Devices

• Inside Macintosh: Memory

• Inside Macintosh: Operating System Utilities

• Inside Macintosh: Processes

• Inside Macintosh: Power PC System Software

Because NI-DAQ has not configured your board, you will need to perform the following code sequence to activate the board. Using the documents listed above, you must retrieve the deviceNode parameter from the Name Registry.

#include<pci.h> void *configureCard(RegEntryIDPtr deviceNode); void *configureCard

( RegEntryIDPtrdeviceNode

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) { unsigned short pciCommandRegister;

unsigned long cardBaseAddress,

miteBaseAddress;

// configure the i/o space of the board such // that it is memory mapped. ExpMgrConfigReadWord(deviceNode,

((LogicalAddress) 0x00000004L), &pciCommandRegister); ExpMgrConfigWriteWord(deviceNode,

((LogicalAddress) 0x00000004L),

(pciCommandRegister | 0x0002));

// get the base addresses for the board. ExpMgrConfigReadLong(deviceNode,

((LogicalAddress) 0x00000010L),

&miteBaseAddress); ExpMgrConfigReadLong(deviceNode,

((LogicalAddress) 0x00000014L),

&cardBaseAddress);

// activate the standard i/o window. *((unsigned long *) (miteBaseAddress +

0x000000c0L)) =

EndianSwap32Bit(((cardBaseAddress &

0xffffff00L) | 0x00000080L));

// return the base address of the board. return ((void *) cardBaseAddress);

}

Port Identification

This manual refers to each port as A, B, and C and each PPI (82C55A) as A, B, C, and D. NI-DAQ and LabVIEW documentation use numbers to identify each port and PPI. For example, this manual uses PPI A port A to refer to port A of the 82C55A identified as PPI A. NI-DAQ, LabWindows/CVI, LabVIEW, or other application software documentation, however, refer to this port as 0. Table 6-1 shows the correlation between the different port names.

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Table 6-1. Port Identification

Chapter 6 Programming

ComponentWorks, LabVIEW,

LabWindows/CVI, and NI-DAQ

0 1 2 3 4 5 6 7 8

9 10 11

This manual also differs from the NI-DAQ, ComponentWorks, LabWindows/CVI, and LabVIEW documentation by using different terminology to describe the 82C55A configurations. Refer to Port C Pin Assignments in Chapter 3, Signal Connections, for more information.

PCI-DIO-96 User Manual

PPI A Port A PPI A Port B PPI A Port C PPI B Port A PPI B Port B PPI B Port C PPI C Port A PPI C Port B PPI C Port C PPI D Port A PPI D Port B PPI D Port C

Programming Considerations for the 82C55A

Modes of Operation

The three basic modes of operation for the 82C55A are as follows:

• Mode 0—Basic I/O

• Mode 1—Strobed I/O

• Mode 2—Bidirectional bus The 82C55A also has a single bit set/reset feature for port C, which is

programmed by the 8-bit control word. For additional information, refer to Appendix B, MSM82C55A Data Sheet.

Mode 0

This mode can be used for simple input and output operations for each port. No handshaking is required; a specified port simply writes to or reads from data.

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Mode 0 has the following features:

• Two 8-bit ports (A and B) and two 4-bit ports (upper and lower nibbles of port C).

• Any port can be input or output.

• Outputs are latched, but inputs are not latched.

Mode 1

This mode transfers data that is synchronized by handshaking signals. Ports A and B use the eight lines of port C to generate or receive the handshake signals. This mode divides the ports into two groups (group A and group B) and includes the following features:

• Each group contains one 8-bit data port (port A or port B) and one 4-bit control/data port (upper or lower nibble of port C).

• The 8-bit data ports can be either input or output; both are latched.

• The 4-bit ports are used for control and status of the 8-bit data ports.

• Interrupt generation and enable/disable functions are available.

Mode 2

This mode can be used for communication over a bidirectional 8-bit bus. Handshaking signals are used in a manner similar to mode 1. Mode 2 is available for use in group A only (port A and the upper nibble of port C). Other features of this mode include the following:

• One 8-bit bidirectional port (port A) and a 5-bit control/status port (port C).

• Latched inputs and outputs.

• Interrupt generation and enable/disable functions.

Single Bit Set/Reset Feature

Any of the eight bits of port C can be set or reset with one control word. This feature generates control signals for port A and port B when these ports are operating in mode 1 or mode 2.

Mode 0–Basic I/O

You can use mode 0 for simple I/O functions (no handshaking) for each of the three ports and assign each port as an input or an output port. Table 6-2 shows the 16 possible I/O configurations. Notice that bit 7 of the control word is set when programming the mode of operation for each port.

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Table 6-2. Mode 0 I/O Configurations

Group A Group B

Number

Control Word

Bit 76543210

Port A Port C

Port B Port C

0 10000000 Output Output Output Output 1 10000001 Output Output Output Input 2 10000010 Output Output Input Output 3 10000011 Output Output Input Input 4 10001000 Output Input Output Output 5 10001001 Output Input Output Input 6 10001010 Output Input Input Output 7 10001011 Output Input Input Input 8 10010000 Input Output Output Output

9 10010001 Input Output Output Input 10 10010010 Input Output Input Output 11 10010011 Input Output Input Input 12 10011000 Input Input Output Output 13 10011001 Input Input Output Input 14 10011010 Input Input Input Output 15 10011011 Input Input Input Input

Upper nibble of port C

Lower nibble of port C

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Mode 0 Basic I/O Programming Example

The following example shows how to configure PPI A for mode 0 input and output.

Write (8255Cnfg,0x80) Set mode 0—ports A, B, and C

Write (PortA, Data) Write data to port A Write (PortB, Data) Write data to port B Write (PortC, Data) Write data to port C

Write (8255Cnfg,0x90) Set mode 0—port A is Input;

Write (PortB, Data) Write data to port B Read (PortA) Read data from port A

Mode 1–Strobed Input

Note: For mode 1 examples, you must configure the don’t care bits appropriately

in the control word if you want to use the other ports in combination with the example.

In mode 1, the digital I/O bits are divided into two groups: group A and group B. Each of these groups contains one 8-bit port and one 4-bit control/data port. The 8-bit port can be either an input or an output port, and the 4-bit port is used for control and status information for the 8-bit port. The transfer of data is synchronized by handshaking signals in the 4-bit port.

are outputs

ports B and C are outputs

The control word written to the Configuration Register to configure port A for input in mode 1 is shown in Figure 6-1. You can use bits PC6 and PC7 of port C as extra input or output lines.

D7 D6 D5 D4 D3 D2 D1 D0

10111/0X XX

Figure 6-1. Control Word to Configure Port A for Mode 1 Input

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Port C bits PC6 and PC7

1 = Input 0 = Output

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Chapter 6 Programming

Figure 6-2 shows the control word written to the Configuration Register to configure port B for input in mode 1. Notice that port B does not have extra input or output lines from port C.

D7 D6 D5 D4 D3 D2 D1 D0

1XXXX1 X1

Figure 6-2. Control Word to Configure Port B for Mode 1 Input

During a mode 1 data read transfer, read port C to obtain the status of the handshaking lines and interrupt signals. See the Port C Status-Word

Bit Definitions for Input (Ports A and B), Port C Status-Word Bit Definitions for Output (Ports A and B), and Port C Status-Word Bit Definitions for Bidirectional Data Path (Port A Only) sections later in

this manual for detailed definitions.

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Port C Status-Word Bit Definitions for Input (Ports A and B)

Address: Base address + 03 (hex) for PPI A

Base address + 07 (hex) for PPI B Base address + 0B (hex) for PPI C Base address + 0F (hex) for PPI D

Type: Read and write Word Size: 8-bit Bit Map:

7 6 5 4 3 2 1 0

I/O I/O IBFA INTEA INTRA INTEB IBFB INTRB

Bit Name Description

7–6 I/O Input/Output—These bits can be used for

general-purpose I/O when port A is in mode 1 input. If these bits are configured for output, the port C bit set/reset function must be used to manipulate them.

5 IBFA Input Buffer Acknowledgment for Port A—A high

setting indicates that data has been loaded into the input latch for port A.

4 INTEA Interrupt Enable Bit for Port A—Setting this bit

enables interrupts from port A of the 82C55A. Control this bit by setting/resetting PC4.

3 INTRA Interrupt Request Status for Port A—When INTEA

and IBFA are high, this bit is high, indicating that an interrupt request is pending for port A.

2 INTEB Interrupt Enable Bit for Port B—Setting this bit

enables interrupts from port B of the 82C55A. Control this bit by setting/resetting PC2.

1 IBFB Input Buffer Acknowledgment for Port B—A high

setting indicates that data has been loaded into the input latch for port B.

0 INTRB Interrupt Request Status for Port B—When INTEB

and IBFB are high, this bit is high, indicating that an interrupt request is pending for port B.

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At the digital I/O connector, port C has the pin assignments shown in Figure 6-3 when in mode 1 input. Notice that the status of STBA* and the status of STBB* are not included in the port C status word.

PC7 I/O PC6 I/O

Group A

Group B

PC5 IBFA PC4 STBA* PC3 INTRA PC2 STBB* PC1 IBFB PC0 INTRB

Figure 6-3. Port C Pin Assignments on I/O Connector when Port C Configured

Mode 1 Strobed Input Programming Example

The following example shows how to configure PPI A for mode 1 input.

Write (8255Cnfg, 0xB0) Set mode 1—port A is an input. Loop until IBFA (PC5) is set, indicating that data is

Read (PortA) Now, read the data from port A

Mode 1–Strobed Output

Note: For mode 1 examples, you must configure the don’t care bits appropriately

in the control word if you want to use the other ports in combination with the example.

The control word written to the Configuration Register to configure port A for output in mode 1 is shown in Figure 6-4. You can use bits PC4 and PC5 of port C as extra input or output lines.

for Mode 1 Input

available in port A to be read

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D7 D6 D5 D4 D3 D2 D1 D0

10101/0X XX

Port C bits PC4 and PC5

1 = Input 0 = Output

Figure 6-4. Control Word to Configure Port A for Mode 1 Output

The control word written to the Configuration Register to configure port B for output in mode 1 is shown in Figure 6-5. Notice that port B does not have extra input or output lines from port C.

D7 D6 D5 D4 D3 D2 D1 D0

1XXXX1 X0

Figure 6-5. Control Word to Configure Port B for Mode 1 Output

During a mode 1 data write transfer, you can obtain the status of the handshaking lines and interrupt signals by reading port C. Notice that the bit definitions are different for a write and a read transfer.

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Port C Status-Word Bit Definitions for Output (Ports A and B)

Address: Base address + 03 (hex) for PPI A

Base address + 07 (hex) for PPI B Base address + 0B (hex) for PPI C Base address + 0F (hex) for PPI D

Type: Read and write Word Size: 8-bit Bit Map:

7 6 5 4 3 2 1 0

OBFA* INTEA I/O I/O INTRA INTEB OBFB* INTRB

Bit Name Description

7 OBFA* Output Buffer for Port A—A low setting indicates

that the CPU has written data to port A.

6 INTEA Interrupt Enable Bit for Port A—Setting this bit

enables interrupts from port A of the 82C55A. Control this bit by setting/resetting PC6.

5–4 I/O Input/Output—These bits can be used for

general-purpose I/O when port A is in mode 1 output. If these bits are configured for output, you must use the port C bit set/reset function to manipulate them.

3 INTRA Interrupt Request Status for Port A—When INTEA

and OBFA* are high, this bit is high, indicating that an interrupt request is pending for port A.

2 INTEB Interrupt Enable Bit for Port B—Setting this bit

enables interrupts from port B of the 82C55A. Control this bit by setting/resetting PC2.

1 OBFB* Output Buffer for Port B—A low setting indicates

that the CPU has written data to port B.

0 INTRB Interrupt Request Status for Port B—When INTEB

and OBFB* are high, this bit is high, indicating that an interrupt request is pending for port B.

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At the digital I/O connector, port C has the pin assignments shown in Figure 6-6 when in mode 1 output. Notice that the status of ACKA* and ACKB* are not included when port C is read.

PC7 OBFA* PC6 ACKA*

Group A

Group B

PC5 I/O PC4 I/O PC3 INTRA PC2 ACKB* PC1 OBFB* PC0 INTRB

Figure 6-6. Port C Pin Assignments on I/O Connector when Port C Configured for

Mode 1 Strobed Output Programming Example

The following example shows how to configure PPI A for mode 1 output.

Write (8255Cnfg, 0xA0) Set mode 1-port A is an output Loop until OBFA (PC7) is set, indicating that the

Write (PortA, Data) Write data to port A

Mode 2–Bidirectional Bus

Note: For mode 2 examples, you must configure the don’t care bits appropriately

in the control word if you want to use the other ports in combination with the example.

Mode 2 has an 8-bit bus that can transfer both input and output data without changing the configuration. The data transfers are synchronized with handshaking lines in port C. This mode uses only port A; however, port B can be used in either mode 0 or mode 1 while port A is configured for mode 2.

Mode 1 Output

data last written to port A has been read

The control word written to the Configuration Register to configure port A as a bidirectional data bus in mode 2 is shown in Figure 6-7. If port B is configured for mode 0, you can use PC2, PC1, and PC0 of port C as extra input or output lines.

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D7 D6 D5 D4 D3 D2 D1 D0

1 1 X X X 1/0 1/0 1/0

Port C

PC <2..0> 1 = Input 0 = Output

Port B

1 = Input 0 = Output

Group B Mode

0 = Mode 0 1 = Mode 1

Figure 6-7. Control Word to Configure Port A as Mode 2 Bidirectional Data Bus

During a mode 2 data transfer, you can obtain the status of the handshaking lines and interrupt signals by reading port C. The port C status-word bit definitions for a mode 2 transfer are shown as follows.

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Port C Status-Word Bit Definitions for Bidirectional Data Path (Port A Only)

Address: Base address + 03 (hex) for PPI A

Base address + 07 (hex) for PPI B Base address + 0B (hex) for PPI C Base address + 0F (hex) for PPI D

Type: Read and write Word Size: 8-bit Bit Map:

7 6 5 4 3 2 1 0

OBFA* INTE1 IBFA INTE2 INTRA I/O I/O I/O

Bit Name Description

7 OBFA* Output Buffer for Port A—A low setting indicates

that the CPU has written data to port A.

6 INTE1 Interrupt Enable Bit for Port A Output Interrupts—

Setting this bit enables output interrupts from port A of the 82C55A. Control this bit by setting/resetting PC6.

5 IBFA Input Buffer Acknowledgment for Port A—A high

setting indicates that data has been loaded into the input latch of port A.

4 INTE2 Interrupt Enable Bit for Port A Input Interrupts—

Setting this bit enables input interrupts from port A of the 82C55A. Control this bit by setting/resetting PC4.

3 INTRA Interrupt Request Status for Port A—If INTE1 and

IBFA are high, this bit is high, indicating that an interrupt request is pending for port A input transfers. If INTE2 and OBFA* are high, this bit is high, indicating that an interrupt request is pending for port A output transfers.

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Bit Name Description (Continued)

2-0 I/O Input/Output—Use these bits for general-purpose

I/O lines if group B is configured for mode 0. If group B is configured for mode 1, refer to the bit explanations shown in the preceding mode 1 sections.

Figure 6-8 shows the port C pin assignments on the digital I/O connector when port C is configured for mode 2. Notice that the status of STBA* and the status of ACKA* are not included in the port C status word.

PC7 OBFA* PC6 ACKA*

Group A

Group B

PC5 IBFA PC4 STBA* PC3 INTRA PC2 # PC1 # PC0 #

# The three port C lines associated with group B function based on the

mode selected for group B; that is, if group B is configured for mode 0, PC<2..0> function as general-purpose I/O, but if group B is configured for mode 1 input or output, PC<2..0> function as handshaking lines as shown in the preceding mode 1 sections.

Figure 6-8. Port C Pin Assignments on I/O Connector when Port C is

Configured for Mode 2

Mode 2 Bidirectional Bus Programming Example

The following example shows how to configure PPI A for mode 2 input and output.

Write (8255Cnfg, 0xC0) Set mode 2 — port A

is bidirectional

Loop until OBFA (PC7) is set, indicating that the

data last written to port A

has been read Write (PortA, Data) Write data to port A Loop until IBFA (PC5) is set, indicating that data is

available in port A to be read Read (PortA) Now, read the data from port A

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Interrupt Handling

You must set the INTEN bit of Interrupt Control Register 2 to enable interrupts from the PCI-DIO-96. Clear this bit first to disable unwanted interrupts. After all sources of interrupts have been disabled or placed in an inactive state, you can set INTEN. You must set INTEN before you generate an interrupt for proper operation.

To interrupt the computer using one of the 82C55A devices, program the selected 82C55A for the I/O mode desired. In mode 1, set either the INTEA or the INTEB bit to enable interrupts from port A or port B, respectively. In mode 2, set either INTE1 or INTE2 for interrupts on output or input transfers, respectively. The INTE1 and INTE2 interrupt outputs are cascaded into a single interrupt output for port A. After you enable interrupts from the 82C55A, set the appropriate enable bit for the selected 82C55A; for example, if you select both mode 2 interrupts for PPI C, set CIRQ0 to interrupt the computer.

To interrupt the computer using one of the 82C53 counter outputs, program the counters as described in the Interrupt Programming Example section later in this chapter.

You can use external signals to interrupt the PCI-DIO-96 when port A or port B is in mode 0 and the low nibble of port C is configured for input. If port A is in mode 0, use PC3 to generate an interrupt; if port B is in mode 0, use PC0 to generate an interrupt. After you have configured the selected 82C55A, you must set the corresponding interrupt enable bit in Interrupt Control Register 1. If you are using PC3, set xIRQ0; if you are using PC0, set xIRQ1, where x is the letter corresponding to the PPI you want to generate interrupts (A–D). When the external signal becomes logic high, an interrupt request occurs. To disable the external interrupt, the interrupt service routine that you have written should acknowledge the interrupt and write the interrupt clear register.

Interrupt Programming Examples for the 82C55A

The following examples show the process required to enable interrupts for several different operating modes. You must write and install the interrupt service routine in order to process the interrupt and gain any useful knowledge from it. You should clear all interrupt sources and interrupt enable bits first to disable unwanted interrupts.

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Mode 1 Strobed Input Programming Example

The following example shows how to set up interrupts for mode 1 input for port A.

Write (8255Cnfg, 0xB0) Set mode 1-port A is an input Write (8255Cnfg, 0x09) Set PC4 to enable interrupts

from the 82C55A Write (IREG2, 0x04) Set INTEN bit Write (IREG1, 0x01) Set AIRQ0 to enable PPI A,

port A interrupts

Mode 1 Strobed Output Programming Example

The following example shows how to set up interrupts for mode 1 output for port A.

Write(8255Cnfg, 0xA0) Set mode 1-port A is an output Write(8255Cnfg, 0x0D) Set PC6 to enable interrupts

from 82C55A Write(IREG2, 0x04) Set INTEN bit Write(IREG1, 0x01) Set AIRQ0 to enable PPI A,

port A interrupts

Mode 2 Bidirectional Bus Programming Example

The following example shows how to set up interrupts for mode 2 output transfers.

Write (8255Cnfg, 0xC0) Set mode 2 — port A is

bidirectional Write (8255Cnfg, 0x0D) Set PC6 to enable interrupt

from 82C55A Write (IREG2, 0x04) Set INTEN bit Write (IREG1, 0x01) Set AIRQ0 to enable PPI A,

port A interrupts

The following example shows how to set up interrupts for mode 2 input transfers.

Write (8255Cnfg, 0xC0) Set mode 2 - port A is

bidirectional Write (8255Cnfg, 0x09) Set PC4 to enable interrupt

from 82C55A Write (IREG2, 0x04) Set INTEN bit Write (IREG1, 0x01) Set AIRQ0 to enable PPI A,

port A interrupts

National Instruments Corporation 6-21 PCI-DIO-96 User Manual

Chapter 6 Programming

Programming Considerations for the 82C53

A general overview of the 82C53 and how it is configured on the PCI-DIO-96 follows.

General Information

The 82C53 contains three counter/timers, each of which can operate in one of six different modes. However, only counter 0 and counter 1 are configured for operation; counter 2 is not connected, nor is it available on the external I/O connector. In addition, counter 0 and counter 1 are wired to the interrupt circuitry in such a way that only four of the modes are available for use.

The source for counter 0 is a 2 MHz clock. If you use counter 0 to interrupt the computer, configure the counter for rate generation, or mode 2. If you use counter 1 to interrupt the computer, counter 0 is a frequency scale that feeds the source input for counter 1. In this case, configure both counters for rate generation, or mode 2.

To determine the time between pulses generated by counter 0, multiply the load value by 500 ns (1/(2 MHz)). To determine the time between pulses generated by counter 1, multiply the load value by the time between pulses of counter 0. A sample configuration procedure is presented in the next section.

Interrupt Programming Example

The following example shows how to set up counter 0 to generate interrupts:

Write(IREG1, 0x00) Disable all 82C55A interrupts Write(IREG2, 0x00) Disable counter interrupts Write(CntrCnfg, 0x34) Set counter 0 to mode 2 Write(IREG2, 0x06) Enable interrupts and select

Write(Ctr0, Data0) Send the least significant byte

Write(Ctr0, Data1) Send the most significant byte

PCI-DIO-96 User Manual 6-22

the output from counter 0

of the counter data to counter 0

National Instruments Corporation

Chapter 6 Programming

The counter begins counting as soon as the most significant byte is written. When you are ready to exit your program, disable the counter and interrupts as shown below.

Write(Cnfg, 0x30) Turn off counter 0 Write(IREG2, 0x00) Disable all PCI-DIO-96 interrupts

Note: In order for any of the interrupts to be processed, you must write and install

an interrupt service routine. Failure to do so could cause the system to fail upon the interrupt generation.

National Instruments Corporation 6-23 PCI-DIO-96 User Manual

Appendix

Specifications

This appendix lists the specifications for the PCI-DIO-96. These specifications are typical at 25° C unless otherwise noted.

Digital I/O

Number of channels ...............................96 I/O

Compatibility ......................................... TTL

Reference voltage................................... +5 V

Power on state........................................ Inputs (High-Z), pulled up

Digital logic levels

Input low voltage Input high voltage

Output low voltage

out

Output high voltage

out

= 2.5 mA)

= -40 µA) = -2.5 mA)

through 100 kΩ

Level Min Max

-0.3 V

2.2 V

—

4.2 V

3.7 V

0.8 V

5.3 V

0.4 V

— —

National Instruments Corporation A-1 PCI-DIO-96 User Manual

Appendix A Speciﬁcations

Transfer rate1 (1 word = 8 bits), absolute max

Language Macintosh PC

900 kHz 845 kHz

Bus Interface

Power Requirement

Physical

LabVIEW

C routine is used to write/read data to/from a port

LabVIEW VI is used to write/read data to/from a port

2.8 kHz 3.8 kHz

Handshaking....................................3 wire, two port

Data transfers...................................Interrupts, programmed I/O

Type........................................................Slave

Power consumption ................................400 mA at +5 VDC (±5%)

Power available at I/O connector............+4.65 to +5.25 V fused at 1 A

Dimensions.............................................13.7 x 10.7 cm (5.4 x 4.2 in.)

I/O connector..........................................100-pin female, 0.050 series

D-type

Environment

Operating temperature............................0° to 70° C

Storage temperature................................-55° to 150° C

Relative humidity....................................5% to 90% noncondensing

Transfer rate depends on the computer and software. These tests were made using either a Power Macintosh 8500, 120 MHz computer, or a Pentium, 133 MHz computer.

PCI-DIO-96 User Manual A-2

National Instruments Corporation

Appendix

MSM82C55A Data Sheet

This appendix contains a manufacturer data sheet for the MSM82C55A CMOS programmable peripheral interface (OKI Semiconductor). This interface is used on the PCI-DIO-96.

OKI Semiconductor. Microprocessor Data Book 1993.

National Instruments Corporation B-1 PCI-DIO-96 User Manual

Appendix

MSM82C53 Data Sheet

This appendix contains a manufacturer data sheet for the MSM82C53 CMOS programmable interval timer (OKI Semiconductor). This timer is used on the PCI-DIO-96.

OKI Semiconductor. Microprocessor Data Book 1993.

National Instruments Corporation C-1 PCI-DIO-96 User Manual

Appendix

Customer Communication

For your convenience, this appendix contains forms to help you gather the information necessary to help us solve your technical problems and a form you can use to comment on the product documentation. When you contact us, we need the information on the Technical Support Form and the configuration form, if your manual contains one, about your system configuration to answer your questions as quickly as possible.

National Instruments has technical assistance through electronic, fax, and telephone systems to quickly provide the information you need. Our electronic services include a bulletin board service, an FTP site, a Fax-on-Demand system, and e-mail support. If you have a hardware or software problem, first try the electronic support systems. If the information available on these systems does not answer your questions, we offer fax and telephone support through our technical support centers, which are staffed by applications engineers.

Electronic Services

Bulletin Board Support

National Instruments has BBS and FTP sites dedicated for 24-hour support with a collection of files and documents to answer most common customer questions. From these sites, you can also download the latest instrument drivers, updates, and example programs. For recorded instructions on how to use the bulletin board and FTP services and for BBS automated information, call (512) 795-6990. You can access these services at:

United States: (512) 794-5422

Up to 14,400 baud, 8 data bits, 1 stop bit, no parity

United Kingdom: 01635 551422

Up to 9,600 baud, 8 data bits, 1 stop bit, no parity

France: 01 48 65 15 59

Up to 9,600 baud, 8 data bits, 1 stop bit, no parity

FTP Support

To access our FTP site, log on to our Internet host, ftp.natinst.com, as anonymous and use your Internet address, such as joesmith@anywhere.com, as your password. The support files and documents are located in the /support directories.

National Instruments Corporation D-1 PCI-DIO-96 User Manual

Fax-on-Demand Support

Fax-on-Demand is a 24-hour information retrieval system containing a library of documents on a wide range of technical information. You can access Fax-on-Demand from a touch-tone telephone at (512) 418-1111.

E-Mail Support (currently U.S. only)

You can submit technical support questions to the applications engineering team through e-mail at the Internet address listed below. Remember to include your name, address, and phone number so we can contact you with solutions and suggestions.

support@natinst.com

Fax and Telephone Support

National Instruments has branch offices all over the world. Use the list below to find the technical support number for your country. If there is no National Instruments office in your country, contact the source from which you purchased your software to obtain support.

Telephone Fax

Australia 03 9879 5166 03 9879 6277 Austria 0662 45 79 90 0 0662 45 79 90 19 Belgium 02 757 00 20 02 757 03 11 Canada (Ontario) 905 785 0085 905 785 0086 Canada (Quebec) 514 694 8521 514 694 4399 Denmark 45 76 26 00 45 76 26 02 Finland 09 527 2321 09 502 2930 France 01 48 14 24 24 01 48 14 24 14 Germany 089 741 31 30 089 714 60 35 Hong Kong 2645 3186 2686 8505 Israel 03 5734815 03 5734816 Italy 02 413091 02 41309215 Japan 03 5472 2970 03 5472 2977 Korea 02 596 7456 02 596 7455 Mexico 5 520 2635 5 520 3282 Netherlands 0348 433466 0348 430673 Norway 32 84 84 00 32 84 86 00 Singapore 2265886 2265887 Spain 91 640 0085 91 640 0533 Sweden 08 730 49 70 08 730 43 70 Switzerland 056 200 51 51 056 200 51 55 Taiwan 02 377 1200 02 737 4644 U.K. 01635 523545 01635 523154

Technical Support Form

Photocopy this form and update it each time you make changes to your software or hardware, and use the completed copy of this form as a reference for your current configuration. Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently.

If you are using any National Instruments hardware or software products related to this problem, include the configuration forms from their user manuals. Include additional pages if necessary.

Name __________________________________________________________________________ Company _______________________________________________________________________ Address ________________________________________________________________________

_______________________________________________________________________________ Fax (___ )___________________ Phone (___ ) ________________________________________ Computer brand ________________ Model ________________ Processor___________________ Operating system (include version number) ____________________________________________ Clock speed ______MHz RAM _____MB Display adapter __________________________ Mouse ___yes ___no Other adapters installed _______________________________________ Hard disk capacity _____MB Brand _____________________________________________ Instruments used _________________________________________________________________

_______________________________________________________________________________ National Instruments hardware product model__________ Revision _______________________ Configuration ___________________________________________________________________ National Instruments software product ___________________________ Version ____________ Configuration ___________________________________________________________________ The problem is: __________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________ List any error messages: ___________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________ The following steps reproduce the problem:____________________________________________

_______________________________________________________________________________

PCI-DIO-96 Hardware and Software Configuration Form

Record the settings and revisions of your hardware and software on the line to the right of each item. Complete a new copy of this form each time you revise your software or hardware configuration, and use this form as a reference for your current configuration. Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently.

National Instruments Products

PCI-DIO-96 board _____________________________________________________________ PCI-DIO-96 board serial number _________________________________________________ Base memory address of PCI-DIO-96 board ________________________________________ Interrupt level of PCI-DIO-96 board ______________________________________________ Programming choice (NI-DAQ, LabVIEW, LabWindows/CVI, or other) __________________ Software version ______________________________________________________________

Other Products

Computer make and model ______________________________________________________ Microprocessor _______________________________________________________________ Clock frequency or speed _______________________________________________________ Type of video board installed ____________________________________________________ Operating system (DOS, Windows, or MacOS) ______________________________________ Operating system version _______________________________________________________ Operating system mode _________________________________________________________ Programming language _________________________________________________________ Programming language version __________________________________________________ Other boards in system _________________________________________________________ Base memory address of other boards _____________________________________________ Interrupt level of other boards ___________________________________________________

Documentation Comment Form

National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs.

Title: PCI-DIO-96 User Manual Edition Date: January 1997 Part Number: 320938B-01

Please comment on the completeness, clarity, and organization of the manual.

_______________________________________________________________________________

If you find errors in the manual, please record the page numbers and describe the errors.

_______________________________________________________________________________

Thank you for your help. Name _________________________________________________________________________ Title __________________________________________________________________________ Company _______________________________________________________________________ Address ________________________________________________________________________

_______________________________________________________________________________ Phone (___ )__________________________ Fax (___ ) _________________________________

Mail to: Technical Publications Fax to: Technical Publications

National Instruments Corporation National Instruments Corporation 6504 Bridge Point Parkway (512) 794-5678 Austin, TX 78730-5039

Prefix Meaning Value

Glossary

p- pico- 10 n- nano- 10 µ- micro- 10

m- milli- 10

k- kilo- 10

M- mega- 10

G- giga- 10

Numbers/Symbols

˚ degrees > greater than ≥ greater than or equal to < less than

- negative of, or minus

-12

-9

-6

-3

Ω ohms / per % percent

National Instruments Corporation G-1 PCI-DIO-96 User Manual

Glossary

± plus or minus + positive of, or plus +5 V +5 Volts signal

A amperes ACK* acknowledge input signal AIRQ0 PPI A port A interrupt enable bit AIRQ1 PPI A port B interrupt enable bit ANSI American National Standards Institute APA PPI A port A APB PPI A port B APC PPI A port C ASIC Application Specific Integrated Circuit AWG American Wire Gauge

BIRQ0 PPI B port A interrupt enable bit BIRQ1 PPI B port B interrupt enable bit BPA PPI B port A BPB PPI B port B BPC PPI B port C

PCI-DIO-96 User Manual G-2

National Instruments Corporation

C Celsius CIRQ0 PPI C port A interrupt enable bit CIRQ1 PPI C port B interrupt enable bit cm centimeters CPA PPI C port A CPB PPI C port B CPC PPI C port C CTR1 counter select bit CTRIRQ counter interrupt enable bit

Glossary

DAQ a system that uses the personal computer to collect, measure, and

generate electrical signals DI digital input DIO digital input/output DIRQ0 PPI D port A interrupt enable bit DIRQ1 PPI D port B interrupt enable bit DMA direct memory access—a method by which data can be transferred

to/from computer memory from/to a device or memory on the bus while

the processor does something else. DMA is the fastest method of

transferring data to/from computer memory. DO digital output DPA PPI D port A DPB PPI D port B DPC PPI D port C

National Instruments Corporation G-3 PCI-DIO-96 User Manual

Glossary

ft feet

GND ground signal

hex hexadecimal

IBF input buffer full signal in. inches INTE1 port A output interrupt enable bit INTE2 port A input interrupt enable bit INTEA port A interrupt enable bit INTEB port B interrupt enable bit INTEN interrupt enable bit INTRA port A interrupt request status INTRB port B interrupt request status I/O input/output

LED light-emitting diode LSB least significant bit

PCI-DIO-96 User Manual G-4

National Instruments Corporation

m meters max maximum MB megabytes of memory min. minutes min minimum MSB most significant bit

OBF* output buffer full signal

PA, PB, PC <0..7> port A, B, or C 0 through 7 lines

Glossary

PCI Peripheral Component Interconnect—a high-performance expansion

bus architecture originally developed by Intel to replace ISA and EISA.

It is achieving widespread acceptance as a standard for PCs and

work-stations; it offers a theoretical maximum transfer rate of 132

Mbytes/s. port a digital port, consisting of four or eight lines of digital input and/or

output PPI programmable peripheral interface

RD* read signal

National Instruments Corporation G-5 PCI-DIO-96 User Manual

Glossary

S samples s seconds SCXI Signal Conditioning eXtensions for Instrumentation—the National

Instruments product line for conditioning low-level signals within an external chassis near sensors so only high-level signals are sent to DAQ

boards in the noisy PC environment signal conditioning the manipulation of signals to prepare them for digitizing STB strobe input signal

TTL transistor-transistor logic typ typical

V volts VDC volts direct current VI virtual instrument—a combination of hardware and/or software

elements, typically used with a PC, that has the functionality of a classic

standalone instrument V

in input voltage

W watts WRT* write signal

PCI-DIO-96 User Manual G-6

National Instruments Corporation

Index

Numbers

+5 V supply pin

connecting directly to ground or other

voltage source (warning), 3-8

description (table), 3-4

82C53 Programmable Interval Timer

data sheet, C-1 to C-12 theory of operation, 4-3

82C53 programming considerations, 6-22 to

6-23

general information, 6-22 interrupt programming example, 6-22 to

6-23

82C53 Register Group

address map (table), 5-3 control word format (figure), 5-6 Interrupt Clear Register, 5-10 Interrupt Control Register 1, 5-7 to 5-8 Interrupt Control Register 2, 5-9

82C55A Programmable peripheral Interface

data sheet, B-1 to B-17 theory of operation, 4-3

82C55A programming considerations, 6-7 to

6-19

Mode 0 basic I/O, 6-8 to 6-10

configurations (table), 6-9 programming example, 6-10

Mode 1 strobed input, 6-10 to 6-13

control word configuration

Port A (figure), 6-10 Port B (figure), 6-11

Port C pin assignments (figure), 6-13

Port C status-word bit definitions,

6-12 to 6-13

programming example, 6-13

Mode 1 strobed output, 6-13 to 6-16

control word configuration

Port A (figure), 6-14

Port B (figure), 6-14 Port C pin assignments (figure), 6-16 Port C status-word bit definitions,

6-15 to 6-16

programming example, 6-16

Mode 2 bidirectional bus, 6-16 to 6-19

control word configuration of Port A

(figure), 6-17 Port C pin assignments (figure), 6-19 Port C status-word bit definitions,

6-18 to 6-19 programming example, 6-19

modes of operation, 6-7 to 6-8

Mode 0, 6-7 to 6-8 Mode 1, 6-8 Mode 2, 6-8 single bit set/reset feature, 6-8

82C55A Register Group

address map (table), 5-2 control word formats (figure), 5-4 description, 5-3 to 5-5 Port C set/reset control words (table), 5-5

ACK* signal

description (table), 3-8 Mode 1 output timing (figure), 3-10

National Instruments Corporation I -1 PCI-DIO-96 User Manual

Index

Mode 2 bidirectional timing (figure), 3-12 AIRQ0 bit, 5-8 AIRQ1 bit, 5-8 APA<7..0> signal (table), 3-4 APB<7..0> signal (table), 3-4 APC<7..0> signal (table), 3-4 ASIC (MITE Application specific Integrated

Circuit) chip, 6-3

BIRQ0 bit, 5-8 BIRQ1 bit, 5-8 bit descriptions. See also Port C status-word

bit definitions.

AIRQ0, 5-8

AIRQ1, 5-8

BIRQ0, 5-8

BIRQ1, 5-8

CIRQ0, 5-7

CIRQ1, 5-7

CTR1, 5-9

CTRIRQ, 5-9

DIRQ0, 5-7

DIRQ1, 5-7

INTEN, 5-9 board configuration, 2-2 BPA<7..0> signal (table), 3-4 BPB<7..0> signal (table), 3-4 BPC<7..0> signal (table), 3-4 bulletin board support, D-1 bus interface specifications, A-2

cabling, custom, 1-5 CIRQ0 bit, 5-7 CIRQ1 bit, 5-7 ComponentWorks software, 1-2 configuration, 2-2

control words

82C53 Register Group control word

format (figure), 5-6

82C55A Register Group

control word formats (figure), 5-4 Port C set/reset control words (table),

5-5

Mode 1 strobed input

Port A configuration (figure), 6-10 Port B configuration (figure), 6-11

Mode 1 strobed output

Port A configuration (figure), 6-14 Port B configuration (figure), 6-14

Mode 2 bidirectional bus (figure), 6-17 CPA<7..0> signal (table), 3-5 CPB<7..0> signal (table), 3-4 CPC<7..0> signal (table), 3-4 CTR1 bit, 5-9 CTRIRQ bit, 5-9 custom cabling, 1-5 customer communication, xii, D-1 to D-2

DATA signal

description (table), 3-9

Mode 1 input timing (figure), 3-10

Mode 1 output timing (figure), 3-11

Mode 2 bidirectional timing (figure), 3-12 digital I/O signal connections, 3-6 to 3-7

block diagram, 3-7

specifications and ratings, 3-6 digital I/O specifications, A-1 to A-2 DIRQ0 bit, 5-7 DIRQ1 bit, 5-7 documentation

conventions used in manual, x-xi

National Instruments documentation,

xi-xii organization of manual, ix-x related documentation, xii

PCI-DIO-96 User Manual I -2

National Instruments Corporation

Index

DPA<7..0> signal (table), 3-5 DPB<7..0> signal (table), 3-4 DPC<7..0> signal (table), 3-4

electronic support services, D-1 to D-2 e-mail support, D-2 environment specifications, A-2 equipment, optional, 1-5

fax and telephone support, D-2 FaxBack support, D-2 FTP support, D-1 fuse, automatic reset, 3-8

Get_DAQ_device_Info call for simple

accesses, 6-5

GND signal (table), 3-4

hardware installation, 2-1

IBF signal

description (table), 3-8 Mode 1 input timing (figure), 3-10 Mode 2 bidirectional timing (figure), 3-12

IBFA bit

Mode 1 strobed input, 6-12 Mode 2 bidirectional bus, 6-18

IBFB bit, 6-12

installation

hardware, 2-1 software, 2-1 unpacking the PCI-DIO-96, 1-6

INTE1 bit, 6-18

INTE2 bit, 6-18 INTEA bit

Mode 1 strobed input, 6-12

Mode 1 strobed output, 6-15

INTEB bit

Mode 1 strobed input, 6-12

Mode 1 strobed output, 6-15

INTEN bit, 5-9 interrupt control circuitry

block diagram, 4-4

theory of operation, 4-3

Interrupt Control Register Group

address map (table), 5-3

Interrupt Clear Register, 5-10

Interrupt Control Register 1, 5-7 to 5-8

Interrupt Control Register 2, 5-9

interrupt generation

developing your own driver, 6-5 to 6-6

simple access with

Get_DAQ_device_Info, 6-5

using NI-DAQ software, 6-4 to 6-5

interrupt handling, 6-20 to 6-21

82C53 programming example, 6-22 to

6-23

82C55A programming examples, 6-20 to

6-21

INTR signal

description (table), 3-9

Mode 1 input timing (figure), 3-10

Mode 1 output timing (figure), 3-11

Mode 2 bidirectional timing (figure), 3-12

INTRA bit

Mode 1 strobed input, 6-12

Mode 1 strobed output, 6-15

Mode 2 bidirectional bus, 6-18

INTRB bit

Mode 1 strobed input, 6-12

Mode 1 strobed output, 6-15

I/O bit

Mode 1 strobed input, 6-12

National Instruments Corporation I -3 PCI-DIO-96 User Manual

Index

Mode 1 strobed output, 6-15 Mode 2 bidirectional bus, 6-19

I/O connector

cable assembly connector pinouts (figure)

pins 1 through 50, 3-2 pins 51 through 100, 3-3

digital I/O connector pin assignments

(figure), 3-2 to 3-3

exceeding maximum ratings (warning),

3-1

Port C pin assignments

Mode 1 input (figure), 6-13 Mode 1 output (figure), 6-16 Mode 2 bidirectional bus (figure),

6-19

signal connection descriptions (table), 3-4

to 3-5

LabVIEW application software, 1-2 LabWindows/CVI applications software, 1-3

manual. See documentation. MITE Application specific Integrated Circuit

(ASIC) chip, 6-3

Mode 0 basic I/O

port configurations (table), 6-9 programming considerations, 6-7 to 6-8 programming example, 6-10

Mode 1 input

interrupt programming example, 6-21 overview and features, 6-8 strobed input programming

considerations, 6-10 to 6-13

control word to configure Port A

(figure), 6-10

control word to configure Port B

(figure), 6-11

Port C pin assignments on I/O

connector (figure), 6-13

Port C status-word bit definitions for

input, 6-12 to 6-13

programming example, 6-13

timing (figure), 3-10

Mode 1 output

interrupt programming example, 6-21 overview and features, 6-8 strobed output programming

considerations, 6-13 to 6-16

control word to configure Port A

(figure), 6-14

control word to configure Port B

(figure), 6-14

Port C pin assignments on I/O

connector (figure), 6-16

Port C status-word bit definitions for

output, 6-15 to 6-16

programming example, 6-16

timing (figure), 3-11

Mode 2 bidirectional bus

interrupt programming example, 6-21 programming considerations, 6-16 to

6-19

control word to configure Port A

(figure), 6-17

Port C pin assignments on I/O

connector, 6-19

Port C status-word bit definitions,

6-18 to 6-19

programming example, 6-19

timing (figure), 3-12

NI-DAQ driver software, 1-3 to 1-4

interrupt generation

developing your own driver, 6-5 simple access using

Get_DAQ_device_Info, 6-5

PCI-DIO-96 User Manual I -4

National Instruments Corporation

Index

overview, 1-3 to 1-4 relationship to programming environment

(figure), 1-4

toolkit for writing PCI driver, 6-4 to 6-5

OBF* signal

description (table), 3-8 Mode 1 output timing (figure), 3-11 Mode 2 bidirectional timing (figure), 3-12

OBFA* bit

Mode 1 strobed output, 6-15 Mode 2 bidirectional bus, 6-18

OBFB* bit, 6-15

operation of PCI-DIO-96. See theory of

operation.

optional equipment, 1-5

PCI initialization for Macintosh, 6-4 to 6-5

developing your own interrupt method,

6-5 to 6-6 performing simple accesses, 6-5 port identification, 6-6 to 6-7 programming options, 6-4 to 6-6 using NI-DAQ and driver toolkit, 6-4 to

6-5

PCI initialization for PC, 6-3 to 6-4 PCI interface circuitry, 4-2 PCI local bus specifications, 6-1 PCI-DIO-96

block diagram, 4-2 configuration, 2-2 custom cabling, 1-5 optional equipment, 1-5 overview, 1-1 requirements for getting started, 1-2 software programming choices, 1-2 to 1-3

ComponentWorks, 1-2

LabVIEW application software, 1-2 LabWindows/CVI application

software, 1-3 NI-DAQ driver software, 1-3 to 1-4 register-level programming, 1-4

unpacking, 1-6 physical specifications, A-2 Port C pin assignments

correlation between mode and

handshaking terminology (table), 3-5 to 3-6

I/O connector

Mode 1 input (figure), 6-13 Mode 1 output (figure), 6-16

Mode 2 bidirectional bus, 6-19 mode configuration, 3-5 to 3-6 overview, 3-5

Port C set/reset control words (table), 5-5 Port C status-word bit definitions

Mode 1 strobed input, 6-12 to 6-13

IBFA, 6-12

IBFB, 6-12

INTEA, 6-12

INTEB, 6-12

INTRA, 6-12

INTRB, 6-12

I/O, 6-12 Mode 1 strobed output, 6-15 to 6-16

INTEA, 6-15

INTEB, 6-15

INTRA, 6-15

INTRB, 6-15

I/O, 6-15

OBFA*, 6-15

OBFB*, 6-15 Mode 2 bidirectional bus, 6-18 to 6-19

IBFA, 6-18

INT1, 6-18

INTE2, 6-18

INTRA, 6-18

National Instruments Corporation I -5 PCI-DIO-96 User Manual

Index

I/O, 6-19

OBFA*, 6-18 port identification, 6-6 to 6-7 power connections, 3-8 power requirement specifications, A-2 programming, 6-1 to 6-23

82C53 programming considerations, 6-22

to 6-23

82C55A considerations, 6-7 to 6-8

Mode 0 basic I/O, 6-8 to 6-10

Mode 1 strobed input, 6-10 to 6-13

Mode 1 strobed output, 6-13 to 6-16

Mode 2 bidirectional bus, 6-16 to

6-19

modes of operation, 6-7 to 6-8

Mode 0, 6-7 to 6-8 Mode 1, 6-8 Mode 2, 6-8

single bit set/reset feature, 6-8 common terms used in examples, 6-2 interrupt generation

developing your own driver, 6-5 to

6-6

simple access with

Get_DAQ_device_Info, 6-5

using NI-DAQ software, 6-4 to 6-5

interrupt handling, 6-20 to 6-21

82C53 programming example, 6-22

to 6-23

82C55A programming examples,

6-20 to 6-21

Mode 0 basic I/O, 6-8 to 6-10

configurations (table), 6-9 programming example, 6-10

Mode 1 strobed input, 6-10 to 6-13

control word to configure Port A

(figure), 6-10

control word to configure Port B

(figure), 6-11

Port C pin assignments on I/O

connector (figure), 6-13

Port C status-word bit definitions for

input, 6-12 to 6-13

programming example, 6-13

Mode 1 strobed output, 6-13 to 6-16

control word to configure Port A

(figure), 6-14

control word to configure Port B

(figure), 6-14

Port C pin assignments on I/O

connector (figure), 6-16

Port C status-word bit definitions for

output, 6-15 to 6-16

programming example, 6-16

Mode 2 bidirectional bus, 6-16 to 6-19

control word to configure Port A

(figure), 6-17

Port C pin assignments on I/O

connector, 6-19

Port C status-word bit definitions,

6-18 to 6-19

programming example, 6-19

PCI initialization for Macintosh, 6-4 to

6-5

developing your own interrupt

method, 6-5 to 6-6 performing simple accesses, 6-5 port identification, 6-6 to 6-7 programming options, 6-4 to 6-6 using NI-DAQ and driver toolkit, 6-4

to 6-5

PCI initialization for PC, 6-3 to 6-4 software programming choices, 1-2 to 1-4

RD* signal

description (table), 3-9 Mode 1 input timing (figure), 3-10 Mode 2 bidirectional timing (figure), 3-12

programming.

PCI-DIO-96 User Manual I -6

National Instruments Corporation

Index

using other software instead, 1-4

registers

82C53 Register Group

address map (table), 5-3 control word format (figure), 5-6 Interrupt Clear Register, 5-10 Interrupt Control Register 1, 5-7 to

5-8

Interrupt Control Register 2, 5-9

82C55A Register Group

address map (table), 5-2 control word formats (figure), 5-4 description, 5-3 to 5-5 Port C set/reset control words (table),

5-5 address map (table), 5-2 to 5-3 correlation between mode and

handshaking terminology (table), 3-5 to 3-6

overview, 5-1

reset feature, 6-8

signal connections

digital I/O signal connections, 3-6 to 3-7

block diagram, 3-7

I/O connector

cable assembly connector pinouts

(figure)

pins 1 through 50, 3-2 pins 51 through 100, 3-3

digital I/O connector pin assignments

(figure), 3-2 to 3-3

exceeding maximum ratings

(warning), 3-1

signal connection descriptions

(table), 3-4 to 3-5 Port C pin assignments, 3-5 to 3-6 power connections, 3-8 timing specifications, 3-8 to 3-12

Mode 1 input timing, 3-10 Mode 1 output timing, 3-11 Mode 2 bidirectional timing, 3-12 signal names used in timing diagrams

(table), 3-8 to 3-9

simple accesses using Get_DAQ_device_Info,

6-5 single bit set/reset feature, 6-8 software installation, 2-1 software programming choices, 1-2 to 1-4

ComponentWorks, 1-2 LabVIEW application software, 1-2 LabWindows/CVI, 1-3 NI-DAQ driver software, 1-3 to 1-4 register-level programming, 1-4

specifications

bus interface, A-2 digital I/O, A-1 to A-2 environment, A-2 physical, A-2 power requirement, A-2

STB* signal

description (table), 3-8 Mode 1 input timing (figure), 3-10 Mode 2 bidirectional timing (figure), 3-12

technical support, D-1 to D-2 theory of operation

82C53 Programmable Interval Timer, 4-3 82C55A Programmable peripheral

Interface, 4-3

interrupt control circuitry, 4-3

block diagram, 4-4 PCI interface circuitry, 4-2 PCI-DIO-96 block diagram, 4-2

timing specifications, 3-8 to 3-12

Mode 1 input timing, 3-10 Mode 1 output timing, 3-11 Mode 2 bidirectional timing, 3-12

National Instruments Corporation I -7 PCI-DIO-96 User Manual

Index

signal names used in timing diagrams

(table), 3-8 to 3-9

unpacking the PCI-DIO-96, 1-6

WR* signal

description (table), 3-9 Mode 1 output timing (figure), 3-11 Mode 2 bidirectional timing (figure), 3-12

PCI-DIO-96 User Manual I -8

National Instruments Corporation

National Instruments PCI-DIO-96 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

PCI-DIO-96 User Manual

Warranty

Copyright

Trademarks

Figures

Tables

Organization of This Manual

Conventions Used in This Manual

National Instruments Documentation

Related Documentation

Customer Communication

About the PCI-DIO-96

What You Need to Get Started

Software Programming Choices

National Instruments Application Software

NI-DAQ Driver Software

Register-Level Programming

Optional Equipment

Custom Cabling

Unpacking

Software Installation

Hardware Installation

Board Configuration

I/O Connector

I/O Connector Pin Descriptions

Port C Pin Assignments

Digital I/O Signal Connections

Figure 3-3. Digital I/O Connections Block Diagram

Power Connections

Timing Specifications

Mode 1 Input Timing

Mode 1 Output Timing

Mode 2 Bidirectional Timing

Functional Overview

PCI Interface Circuitry

82C55A Programmable Peripheral Interface

82C53 Programmable Interval Timer

Interrupt Control Circuitry

Introduction

Register Map

Register Descriptions

Register Description Format

Register Description for the 82C55A

Figure 5-1. Control Word Formats for the 82C55A

Register Description for the 82C53

Figure 5-2. Control Word Format for the 82C53

PCl Local Bus

Programming Examples

PCI Initialization for the PC

PCI Initialization for the Macintosh

Programming Options

Port Identification

Programming Considerations for the 82C55A

Modes of Operation

Mode 0

Mode 1

Mode 2

Single Bit Set/Reset Feature

Mode 0–Basic I/O

Mode 0 Basic I/O Programming Example

Mode 1–Strobed Input

Port C Status-Word Bit Definitions for Input (Ports A and B)

Mode 1 Strobed Input Programming Example

Mode 1–Strobed Output

Port C Status-Word Bit Definitions for Output (Ports A and B)

Mode 2–Bidirectional Bus

Port C Status-Word Bit Definitions for Bidirectional Data Path (Port A Only)

Mode 2 Bidirectional Bus Programming Example

Interrupt Handling

Interrupt Programming Examples for the 82C55A

Mode 1 Strobed Input Programming Example

Mode 1 Strobed Output Programming Example

Mode 2 Bidirectional Bus Programming Example

Programming Considerations for the 82C53

General Information

Interrupt Programming Example