Measurement Computing USB-4301 - Manual (Page 5)

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