Microchip CAP1203 Handleiding

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 2013-2015 Microchip Technology Inc. DS00001572B-page 1

General Description

The CAP1203 is a multiple channel capacitive touch

sensor controller. It contains individual capacitive touch

sensor inputs with programmable sensitivity for use in

touch sensor applications. Each sensor input is cali-

brated to compensate for system parasitic capacitance

and automatically recalibrated to compensate for grad-

ual environmental changes.

The CAP1203 includes Multiple Pattern Touch recogni-

tion that allows the user to select a specific set of but-

tons to be touched simultaneously. If this pattern is

detected, a status bit is set and an interrupt is gener-

ated.

The CAP1203 has Active and Standby states, each

with its own sensor input configuration controls. Power

consumption in the Standby state is dependent on the

number of sensor inputs enabled as well as averaging,

sampling time, and cycle time. Deep Sleep is the low-

est power state available, drawing 5µA (typical) of cur-

rent. In this state, no sensor inputs are active, and

communications will wake the device.

Applications

• Desktop and Notebook PCs

• LCD Monitors

• Consumer Electronics

• Appliances

Features

• Three (3) Capacitive Touch Sensor Inputs

- Programmable sensitivity

- Automatic recalibration

- Calibrates for parasitic capacitance

- Individual thresholds for each button

• Multiple Button Pattern Detection

• Power Button Support

• Press and Hold Feature for Volume-like Applica-

tions

• 3.3V or 5V Supply

• Analog Filtering for System Noise Sources

• RF Detection and Avoidance Filters

• Digital EMI Blocker

• 8kV ESD Rating on All Pins (HBM)

• Low Power Operation

- 5µA quiescent current in Deep Sleep

- 50µA quiescent current in Standby (1 sensor

input monitored)

- Samples one or more channels in Standby

• SMBus / I2C Compliant Communication Interface

• Available in an 8-pin 2mm x 3mm TDFN RoHS

compliant package

• Available in an 8-pin SOIC RoHS compliant pack-

age

CAP1203

3-Channel Capacitive Touch Sensor

DS00001572B-page 2  2013-2015 Microchip Technology Inc.

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 2013-2015 Microchip Technology Inc. DS00001572B-page 3

Table of Contents

1.0 Introduction ..................................................................................................................................................................................... 4

2.0 Pin Description and Configuration .................................................................................................................................................. 8

3.0 Functional Description .................................................................................................................................................................. 21

4.0 Register Descriptions .................................................................................................................................................................... 58

5.0 Operational Characteristics ........................................................................................................................................................... 69

6.0 Package Outline ............................................................................................................................................................................ 85

Appendix A: Data Sheet Revision History ........................................................................................................................................... 91

The Microchip Web Site ...................................................................................................................................................................... 93

Customer Change Notification Service ............................................................................................................................................... 93

Customer Support ............................................................................................................................................................................... 93

Product Identification System ............................................................................................................................................................. 94