Measurement-computing USB-4302 Manuel d'utilisateur télécharger pdf (Page 13)

Chapter 3

Functional Details

USB-4302 block diagram

USB-4302 functions are illustrated in the block diagram shown here.

37-pin 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)

1.0/1.67/

3.3/5.0 MHZ

12 MHZ

Data Bus

Figure 4. USB-4302 functional block diagram

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 27 28

USB-4302 2
HM USB-4302.doc 3
Table of Contents 5
USB-4302 User's Guide 6
About this User's Guide 7
Introducing the USB-4302 8
Installing the software 10
Installing the USB-4302 10
The red stripe 11
Functional Details 13
Components 14
Signal connections 15
Oscillator output 16
Counter operation 17
Counting modes 18
The "Special" gate 19
Output control 19
Example 1 19
Example 2 20
Specifications 22
Digital input / output 23
Interrupt Input 23
Microcontroller 24
USB +5V voltage 24
USB specifications 25
Environmental 25
Mechanical 25
Main connector and pin out 25
P1 pin out 26
Declaration of Conformity 27

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