SX8663 datasheet(2/64 Pages) SEMTECH

2 / 64 page

ADVANCED COMMUNICATIONS & SENSING

Rev5 4

th August 2011

www.semtech.com

SX8663

Capacitive Button Matrix (up to 36) and Proximity Controller

with Individual LED Drivers and Buzzer Output

Table of Contents

GENERAL DESCRIPTION........................................................................................................................ 1

TYPICAL APPLICATION CIRCUIT ............................................................................................................ 1

KEY PRODUCT FEATURES..................................................................................................................... 1

APPLICATIONS....................................................................................................................................... 1

ORDERING INFORMATION...................................................................................................................... 1

GENERAL DESCRIPTION............................................................................................................... 4

1.1

Pin Diagram

1.2

Marking information

1.3

Pin Description

1.4

Simplified Block Diagram

1.5

Acronyms

ELECTRICAL CHARACTERISTICS ................................................................................................. 7

2.1

Absolute Maximum Ratings

2.2

Recommended Operating Conditions

2.3

Thermal Characteristics

2.4

Electrical Specifications

FUNCTIONAL DESCRIPTION........................................................................................................ 10

3.1

Introduction

3.1.1

General

3.1.2

Parameters

3.1.3

Configuration

3.2

Scan Period

3.3

Operation modes

3.4

Sensors on the PCB

3.4.1

Matrix Keys/Buttons (MK)

3.4.2

Priority Key/Button (PK)

3.4.3

Proximity Sensor (PS)

3.4.4

Schematics Requirements

3.5

Button Information (MK and PK)

3.6

Analog Sensing Interface

3.7

Offset Compensation

3.8

Processing

3.9

Configuration

3.10

Power Management

3.11

Clock Circuitry

3.12

I2C interface

3.13

Interrupt

3.13.1

Power up

3.13.2

Assertion

3.13.3

Clearing

3.13.4

Example

3.14

Reset

3.14.1

Power up

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