Texas Instruments TUSB2136 Manuale utente

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December 2001 Mixed Signal Products

User’s Guide

SCAU003

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,

enhancements, improvements, and other changes to its products and services at any time and to discontinue

any product or service without notice. Customers should obtain the latest relevant information before placing

ordersandshouldverifythatsuchinformationiscurrentandcomplete.AllproductsaresoldsubjecttoTI’sterms

and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI

deems necessary to support this warranty. Except where mandated by government requirements, testing of all

parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for

their products and applications using TI components. To minimize the risks associated with customer products

and applications, customers should provide adequate design and operating safeguards.

TIdoesnotwarrantorrepresentthatanylicense, eitherexpress orimplied, isgranted underanyTIpatentright,

inwhichTIproductsorservicesareused.InformationpublishedbyTIregardingthird–partyproductsorservices

does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.

Use of such information may require a license from a third party under the patents or other intellectual property

of the third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction

of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for

such altered documentation.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for that

product or service voids all express and any implied warranties for the associated TI product or service and

is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

EVM IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation kit being sold by TI is intended for use for ENGINEERING

DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to

befitforcommercialuse.Assuch,thegoodsbeingprovidedmaynotbecompleteinterms

of required design-, marketing-, and/or manufacturing-related protective considerations,

including product safety measures typically found in the end product incorporating the

goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may not meet the technical

requirements of the directive.

Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide,

the kit may be returned within 30 days from the date of delivery for a full refund. THE

FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO

BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR

STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE.

Theuserassumesallresponsibilityandliabilityforproperandsafehandlingofthegoods.

Further, the user indemnifies TI from all claims arising from the handling or use of the

goods. Please be aware that the products received may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is

the user’s responsibility to take any and all appropriate precautions with regard to

electrostatic discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER

PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL,

INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TIcurrentlydealswithavarietyofcustomersforproducts,andthereforeourarrangement

with the user is not exclusive.

TI assumes no liability for applications assistance, customer product design,

software performance, or infringement of patents or services described herein.

Pleasereadthe EVMUser’s Guideand,specifically,theEVM WarningsandRestrictions

notice in the EVM User’s Guide prior to handling the product. This notice contains

important safety information about temperatures and voltages. For further safety

concerns, please contact the TI application engineer.

Personshandlingtheproductmusthaveelectronicstrainingandobservegoodlaboratory

practice standards.

No license is granted under any patent right or other intellectual property right of TI

covering or relating to any machine, process, or combination in which such TI products

or services might be or are used.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the specified input and output ranges described in

the EVM User’s Guide.

Exceeding the specified input range may cause unexpected operation and/or irreversible

damage to the EVM. If there are questions concerning the input range, please contact a TI

field representative prior to connecting the input power.

Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/or

possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to

connecting any load to the EVM output. If there is uncertainty as to the load specification,

please contact a TI field representative.

Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan

60°C.TheEVM isdesignedto operateproperlywith certaincomponentsabove 60°C aslong

astheinputandoutput rangesare maintained.Thesecomponentsincludebut arenot limited

tolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.These

typesof devicescanbeidentifiedusingtheEVM schematiclocated intheEVMUser’sGuide.

When placing measurement probes near these devices during operation, please be aware

that these devices may be very warm to the touch.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

Related Documentation From Texas Instruments

Preface

Read This First

How to Use This Manual

This document contains the following chapters:

-Chapter 1 –Introduction

-Chapter 2 –Hardware Overview

-Chapter 3 –EVM Operation

-Chapter 4 –Bill of Materials

-Chapter 5 –EVM Layout

Related Documentation From Texas Instruments

TPS2149 3.3-VLDOandDual Switchdatasheet,literaturenumberSLVS401

TUSB2136 USB Keyboard Hub Controller data sheet, literature number

SLLS442

FCC Warning

Thisequipmentisintendedforuseinalaboratorytestenvironmentonly.Itgen-

erates,uses,andcanradiateradiofrequencyenergyandhasnotbeentested

for compliance with the limits of computing devices pursuant to subpart J of

part 15 of FCC rules, which are designed to provide reasonable protection

against radio frequency interference. Operation of this equipment in other en-

vironmentsmaycauseinterferencewithradiocommunications,inwhichcase

the user at his own expense will be required to take whatever measures may

be required to correct this interference.

Contents

vii

Contents

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Required Hardware and Software 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Hardware Overview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 EVM Operation 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Setup 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Interfaces and USB Ports 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Power Supplies 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Light Emitting Diodes (LEDs) 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 Jumpers and Test Points 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6 EEPROM 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Bill of Materials 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 EVM Layout 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

1–1 USB Keyboard/Hub EVM Hardware 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

3–1 LED Description 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–2 Jumpers and Test Points 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 QWERTY Keyboard Matrix 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1 EVM Bill of Materials for Edge Number 6436539 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–2 EVM Bill of Materials for Edge Number 6436540 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii

1-1

Introduction

Thisuser’sguidedescribesthesetupand operation of theUSBkeyboard/hub

evaluation module (EVM). Information and instruction presented throughout

this document assumes user familiarity with universal serial bus (USB)

protocol and the use of common lab testing equipment.

Additional information about this EVM can be found at:

www.ti.com/sc/usb–kbdkit

Topic Page

1.1 Required Hardware and Software 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Required Hardware and Software

1-2

1.1 Required Hardware and Software

The USB keyboard/hub EVM is designed for use with a personal computer

running a USB-enabled operating system. The PC, with BIOS, chipsets, and

operating system, should be USB 1.1 or 2.0 specification-compliant. If the

BIOS is not compliant, the system may not boot when USB devices are

connected at power up, and the EVM may not function. Additionally, one or

more low- or full-speed USB devices are needed to plug into the downstream

portsoftheUSBkeyboard/hubEVMtoexercisethehubports.AstandardUSB

cableis needed to connect theUSBkeyboard/hubEVMtoadownstream port

of the PC or a USB hub tier.

Figure 1–1.USB Keyboard/Hub EVM Hardware

USB EVM

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