TUSB9261

SLLSE67B

– MARCH 2011 – REVISED MAY 2011

www.ti.com

Contents

1

MAIN FEATURES

................................................................................................................ 5

1.1

TUSB9261 Features

........................................................................................................ 5

1.2

Target Applications

......................................................................................................... 5

2

RELATED DOCUMENTS

....................................................................................................... 6

2.1

TUSB9261 Related Documentation

...................................................................................... 6

3

INTRODUCTION

.................................................................................................................. 7

3.1

System Overview

........................................................................................................... 7

3.2

Device Block Diagram

...................................................................................................... 7

4

OPERATION

....................................................................................................................... 9

4.1

General Functionality

....................................................................................................... 9

4.2

Firmware Support

......................................................................................................... 10

4.3

GPIO/PWM LED Designations

.......................................................................................... 10

4.4

Power Up and Reset Sequence

......................................................................................... 11

5

SIGNAL DESCRIPTIONS

..................................................................................................... 12

6

CLOCK CONNECTIONS

...................................................................................................... 16

6.1

Clock Source Requirements

............................................................................................. 16

6.2

Clock Source Selection Guide

........................................................................................... 16

6.3

Oscillator

.................................................................................................................... 17

6.4

Crystal

....................................................................................................................... 17

7

ELECTRICAL SPECIFICATIONS

.......................................................................................... 18

7.1

Absolute Maximum Ratings

.............................................................................................. 18

7.2

Thermal Information

....................................................................................................... 18

7.3

Recommended Operating Conditions

.................................................................................. 18

7.4

DC Electrical Characteristics for 3.3-V Digital I/O

..................................................................... 19

8

POWER CONSUMPTION

..................................................................................................... 20

2

Contents

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© 2011, Texas Instruments Incorporated