Measurement-computing USB-4301 Manuel d'utilisateur télécharger pdf (Page 5)

HM USB-4301.doc

Table of Contents

Preface

About this User's Guide ....................................................................................................................... 7

What you will learn from this user's guide ......................................................................................................... 7

Conventions in this user's guide ........................................................................................................................................ 7

Where to find more information ......................................................................................................................... 7

Chapter 1

Introducing the USB-4301 .................................................................................................................... 8

Software features ................................................................................................................................................ 8

Connecting a USB-4301 to your computer is easy ............................................................................................. 8

Chapter 2

Installing the USB-4301 ........................................................................................................................ 9

What comes with your USB-4301 shipment? ..................................................................................................... 9

Hardware .......................................................................................................................................................................... 9

Additional documentation ................................................................................................................................................. 9

Unpacking the USB-4301 ................................................................................................................................. 10

Installing the software ...................................................................................................................................... 10

Installing the USB-4301 ................................................................................................................................... 10

Chapter 3

Functional Details ............................................................................................................................... 11

USB-4301 block diagram ................................................................................................................................. 11

External components ........................................................................................................................................ 12

USB connector .................................................................................................................................................................12

Status LED .......................................................................................................................................................................12

Power LED ......................................................................................................................................................................12

Screw terminal banks .......................................................................................................................................................12

Counter terminals (INP1 to INP5, GAT1 to GAT5, and OUT1 to OUT5) ......................................................................14

Digital input (DI0 to DI7) and output (DO0 to DO7) terminals .......................................................................................14

Digital input control terminal (DI CTL) for pull-up/down configuration ........................................................................15

Interrupt input terminal (INT) ..........................................................................................................................................15

Oscillator output terminal (OSC) .....................................................................................................................................15

Ground terminals (GND) .................................................................................................................................................15

Oscillator output (OSC) .................................................................................................................................... 15

Internal sources ................................................................................................................................................................15

External sources ...............................................................................................................................................................16

Divider (OSC divider)......................................................................................................................................................16

Counter operation ............................................................................................................................................. 16

Count source ....................................................................................................................................................................17

Gate control .....................................................................................................................................................................17

Counting modes ................................................................................................................................................ 17

Reload ..............................................................................................................................................................................17

Recycle ............................................................................................................................................................................17

BCD/Binary mode ...........................................................................................................................................................18

The "Special" gate............................................................................................................................................................18

Output control ..................................................................................................................................................................18

Example 1 ........................................................................................................................................................................19

Example 2 ........................................................................................................................................................................19

Interrupt input pin (INT) ................................................................................................................................... 20

1 2 3 4 5 6 7 8 9 10 ... 26 27

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