Measurement-computing USB-4301 Manuale Utente Scaricare il pdf (Pagina 11)

Chapter 3

Functional Details

USB-4301 block diagram

USB-4301 functions are illustrated in the block diagram shown here.

Screw terminal I/O connector

Interrupt Input

Digital I/O

Digital

input

Digital

output

9513

CTR1 Input

CTR1 Gate

CTR2 Input

CTR2 Gate

CTR2 Output

CTR3 Gate

CTR3 Output

CTR4 Input

CTR4 Gate

CTR4 Output

CTR5 Input

CTR5 Gate

Counter 1

Counter 2

Counter 3

Counter 4

Counter 5

USB

Full-speed

USB 2.0

Compliant

Interface

USB

Microcontroller

Clock

Generator

(7:0)

Screw terminal I/O connector

1.0/1.67/

3.3/5.0 MHZ

12 MHZ

Data Bus

Figure 1. USB-4301 functional block diagram

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 26 27

HM USB-4301.doc 3
Table of Contents 5
Chapter 4 6
About this User's Guide 7
Introducing the USB-4301 8
Unpacking the USB-4301 10
Installing the software 10
Installing the USB-4301 10
Functional Details 11
External components 12
Pin 56Pin 29 13
Pin 28Pin 1 13
USB-4301 13
Oscillator output (OSC) 15
Counter operation 16
Counting modes 17
BCD/Binary mode 18
The "Special" gate 18
Output control 18
Example 1 19
Example 2 19
Interrupt input pin (INT) 20
Specifications 21
Digital input / output 22
Interrupt Input 22
Microcontroller 23
USB +5V voltage 23
USB specifications 24
Environmental 24
Mechanical 24
Screw terminal pin out 25
Declaration of Conformity 26

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