SX8639 datasheet(3/81 Pages) SEMTECH

Part #	SX8639

Description	Low Power, Capacitive Button and Wheel Touch Controller

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision 7_8, September 10

www.semtech.com

3

SX8639

Low Power, Capacitive Button and Wheel Touch Controller

(8 sensors) with Enhanced LED Drivers and Proximity Sensing

3.15.4

Example

15

3.16

General Purpose Input and Outputs

15

3.16.1

Introduction and Definitions

15

3.16.2

GPI

15

3.16.3

GPP

15

3.16.4

GPO

15

3.16.5

Intensity index vs PWM pulse width

15

3.17

Smart Wake Up

15

4

PIN DESCRIPTIONS ..................................................................................................................... 15

4.1

Introduction

15

4.2

ASI pins

15

4.3

Host interface pins

15

4.4

Power management pins

15

4.5

General purpose IO pins

15

5

DETAILED CONFIGURATION DESCRIPTIONS .............................................................................. 15

5.1

Introduction

15

5.2

General Parameters

15

5.3

Capacitive Sensors Parameters

15

5.4

Button Parameters

15

5.5

Wheel Parameters

15

5.6

Mapping Parameters

15

5.7

GPIO Parameters

15

6

I2C INTERFACE........................................................................................................................... 15

6.1

I2C Write

15

6.2

I2C read

15

6.3

I2C Registers Overview

15

6.4

Status Registers

15

6.5

Control Registers

15

6.6

SPM Gateway Registers

15

6.6.1

SPM Write Sequence

15

6.6.2

SPM Read Sequence

15

6.7

NVM burn

15

7

APPLICATION INFORMATION ...................................................................................................... 15

7.1

Typical Application Schematic

15

7.2

Example of Touch+Proximity Module

15

7.2.1

Overview

15

7.2.2

Operation

15

7.2.3

Performance

15

7.2.4

Schematics

15

7.2.5

Layout

15

8

REFERENCES ............................................................................................................................. 15

9

PACKAGING INFORMATION ........................................................................................................ 15

9.1

Package Outline Drawing

15

9.2

Land Pattern

15

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SX8639 Datasheet(PDF) 3 Page - Semtech Corporation

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