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SX8663 Datasheet(PDF) 2 Page - Semtech Corporation |
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SX8663 Datasheet(HTML) 2 Page - Semtech Corporation |
2 / 64 page ADVANCED COMMUNICATIONS & SENSING Rev5 4 th August 2011 © 2011 Semtech Corp. www.semtech.com 2 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 1 GENERAL DESCRIPTION............................................................................................................... 4 1.1 Pin Diagram 4 1.2 Marking information 4 1.3 Pin Description 5 1.4 Simplified Block Diagram 6 1.5 Acronyms 6 2 ELECTRICAL CHARACTERISTICS ................................................................................................. 7 2.1 Absolute Maximum Ratings 7 2.2 Recommended Operating Conditions 7 2.3 Thermal Characteristics 7 2.4 Electrical Specifications 8 3 FUNCTIONAL DESCRIPTION........................................................................................................ 10 3.1 Introduction 10 3.1.1 General 10 3.1.2 Parameters 10 3.1.3 Configuration 10 3.2 Scan Period 10 3.3 Operation modes 11 3.4 Sensors on the PCB 12 3.4.1 Matrix Keys/Buttons (MK) 12 3.4.2 Priority Key/Button (PK) 12 3.4.3 Proximity Sensor (PS) 13 3.4.4 Schematics Requirements 13 3.5 Button Information (MK and PK) 15 3.6 Analog Sensing Interface 15 3.7 Offset Compensation 17 3.8 Processing 18 3.9 Configuration 18 3.10 Power Management 20 3.11 Clock Circuitry 20 3.12 I2C interface 20 3.13 Interrupt 21 3.13.1 Power up 21 3.13.2 Assertion 21 3.13.3 Clearing 21 3.13.4 Example 22 3.14 Reset 22 3.14.1 Power up 22 |
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