ADLINK Technology NuDAQ ACL-8454 Bedienungsanleitung

NuDAQ



ACL-8454

MultiFunctions

Counter / Timer Card

User’s Guide

Manual Rev. 1.22: April 15, 2000

The information in this document is subject to change without

prior notice in order to improve reliability, design and function and

does not represent a commitment on the part of the manu-

facturer.

In no event will the manufacturer be liable for direct, indirect,

special, incidental, or consequential damages arising out of the

use or inability to use the product or documentation, even if ad-

vised of the possibility of such damages.

This document contains proprietary information protected by

reproduced by any mechanical, electronic, or other means in any

form without prior written permission of the manufacturer.

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Other product names mentioned herein are used for identification

purposes only and may be trademarks and/or registered

trademarks of their respective companies.

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Contents

•

Contents

Contents......................................................................i

How to Use This Guide.............................................iii

Chapter 1 Introduction .............................................1

1.1 Features..............................................................................3

1.2 Applications........................................................................3

1.3 Specifications.....................................................................4

Chapter 2 Installation...............................................5

2.1 What You Have ...................................................................5

2.2 Unpacking...........................................................................5

2.3 PCB Layout of ACL-8454 .....................................................6

2.4 Default Configurations........................................................7

2.5 Base Address Setting..........................................................8

2.6 Pin Assignment of Connector............................................10

2.7 Clock System....................................................................11

2.8 Counters Architecture .......................................................12

2.9 Clock Source Configurations............................................17

2.10 Gate Control Configurations.............................................19

2.11 Counter Outputs................................................................20

2.12 DuaI Interrupt System.......................................................21

2.13 Digital Input and Output....................................................23

2.14 Summary of Default Setting..............................................24

2.15 Notes for Installing More 8254 Chips.................................24

2.16 Daughter Board Connection .............................................25

Chapter 3 Registers Format...................................26

3.1 I/O Port Address................................................................26

3.2 Timer/Counter Registers...................................................27

3.3 Chip Select Register.........................................................27

•

Contents

3.4 Digital Input Registers.......................................................28

3.5 Digital Output Register......................................................28

3.6 Low-level Programming...................................................30

Chapter 4 Applications...........................................32

4.1 Timer / Counter Connection..............................................32

4.2 Frequency Generator........................................................33

4.3 Pulse Width Measurement................................................35

4.4 Frequency Measurement..................................................36

4.5 Event Counter...................................................................38

Chapter 5 C/C++ Library..........................................39

5.1 Installation........................................................................40

5.2 W_8454_Initial...................................................................42

5.3 Set_Chip...........................................................................43

5.4 W_8454_Write_Counter.....................................................44

5.5 W_8454_Read_Counter.....................................................45

5.6 W_8454_Stop_Counter......................................................45

5.7 W_8454_DO.......................................................................46

5.8 W_8454_DI ........................................................................47

5.9 8454 Mode Functions........................................................49

5.10 W_8454_INT_Enable..........................................................50

5.11 W_8454_INT_Disable.........................................................51

Appendix 8254 Timer Chip Operation.....................52

Product Warranty / Service......................................55

How to Use This Guide

•

iii

How to Use This Guide

This manual is designed to help you use the ACL-8454. The manual

describes how to modify various settings on the ACL-8454 card to

meet your requirements. It is divided into 5 chapters:

•Chapter 1, "Introduction," gives an overview of the product features,

applications, and specifications.

•Chapter 2, "Installation & Configurations" describes the operation

method and multi-functions of the ACL-8454. Users should read

through this chapter to understand the configurations of the ACL-

8454. The chapter will also teach user how to install the ACL-

8454.

•Chapter 3, "Registers Format," describes the details of register

format of the ACL-8454, this information is very useful for the

programmers who want to control the hardware by low level

programming.

•Chapter 4, "Signal Connection & Applications," describes the

connectors' pin assignment and how to connect the outside signal

and devices to / from the ACL-8454. Some applications also be

introduced.

•Chapter 5, "C/C++ Library" introduces the C-language library for

operating the ACL-8454. Some examples are shown too.

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