Microchip CAP1208 Bedienungsanleitung

Microchip Nicht kategorisiert CAP1208

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 2013-2015 Microchip Technology Inc. DS00001570C-page 1

General Description

The CAP1208 is a multiple channel capacitive touch

sensor controller. It contains eight (8) individual capac-

itive touch sensor inputs with programmable sensitivity

for use in touch sensor applications. Each sensor input

is calibrated to compensate for system parasitic capac-

itance and automatically recalibrated to compensate

for gradual environmental changes.

The CAP1208 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 CAP1208 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

• Eight (8) 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 a 16-pin 3mm x 3mm QFN RoHS

compliant package

• Available in a 14-pin SOIC RoHS compliant pack-

age

CAP1208

8-Channel Capacitive Touch Sensor

CAP1208

DS00001570C-page 2 2013-2015 Microchip Technology Inc.

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The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).

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Customer Notication System

 2013-2015 Microchip Technology Inc. DS00001570C-page 3

CAP1208

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