Microchip Technology AT42QT1010 Manual de usuario

AT42QT1010

AT42QT1010 - Evaluation Kit User's Guide

Preface

Important: Notice to customers:

All documentation becomes dated, and this manual is no exception. Microchip tools and

documentation are constantly evolving to meet customer needs, so some actual dialogs and/or

tool descriptions may differ from those in this document. Please refer to our website

(www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each

page, in front of the page number. The numbering convention for the DS number is

“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the

document.

For the most up-to-date information on development tools, see the MPLAB® IDE online help.

Select the Help menu, and then Topics to open a list of available online help files.

Introduction

The AT42QT1010 Evaluation Kit shows touch and proximity capabilities of the AT42QT series of touch

turnkey products.

The kit has one self-capacitance touch button with the option to connect an external sensing electrode

using SMD test pad (TP). An on-board LED indicates the touch status.

Recommended Reading

For the latest information on the device, refer to https://www.microchip.com/wwwproducts/en/

AT42QT1010.

Table of Contents

Preface............................................................................................................................ 1

1. Introduction................................................................................................................3

1.1. Features and Overview................................................................................................................ 3

1.2. Functional Block Diagram............................................................................................................ 3

2. Getting Started.......................................................................................................... 4

2.1. Quick Start....................................................................................................................................4

2.2. Touch Status LED.........................................................................................................................4

3. User Guide................................................................................................................ 5

3.1. Powering the Board......................................................................................................................5

3.2. Operation Modes..........................................................................................................................5

4. Documentation and Relevant Links...........................................................................6

5. Hardware Revision History and Known Issues..........................................................7

5.1. Identifying Product ID and Revision............................................................................................. 7

5.2. Revision 4.....................................................................................................................................7

6. Document Revision History ...................................................................................... 8

The Microchip Web Site.................................................................................................. 9

Customer Change Notification Service............................................................................9

Customer Support........................................................................................................... 9

Microchip Devices Code Protection Feature................................................................... 9

Legal Notice...................................................................................................................10

Trademarks................................................................................................................... 10

Quality Management System Certified by DNV.............................................................11

Worldwide Sales and Service........................................................................................12

AT42QT1010

1. Introduction

1.1 Features and Overview

• One Touch Sensor – configurable as either a single key or a proximity sensor (configurable

sensitivity)

• Option to Connect External Sensing Electrode

• Mode of Operations:

– Sync

– Normal

– Low Power

• Technology: Spread-Spectrum Charge-Transfer (Direct mode)

• Status LED to indicate Touch

• On-Board Self-Capacitance Sensor

– size: 9x16 mm

• USB Power Input

1.2 Functional Block Diagram

Figure 1-1. Functional Block Diagram

AT42QT1010

Self-

capacitance

Line Power-in

Sensor

Status

Sensor

Button

Test Pin for

External Sensor

AT42QT1010

Introduction

2. Getting Started

2.1 Quick Start

Figure 2-1. Quick Start

AT42QT1010

USB Connector Sensor

Mode Select

Touch Status LED

2.2 Touch Status LED

By default, the LED will illuminate during power-up and will turn off upon touching the self-capacitance

key.

AT42QT1010

Getting Started

3. User Guide

3.1 Powering the Board

The kit is powered from the micro-USB connector. The kit can be powered by connecting the micro-USB

cable to the USB connector on the board and to the computer.

On initial power-up, the QT1010 requires approximately 100 ms to power on, to allow power supplies to

stabilize. During this time, the OUT-pin state is not valid and should be ignored.

3.2 Operation Modes

The kit operates in three different operation modes, which depend on the state of the SYNC pin (High or

Low).

3.2.1 Fast Mode

The QT1010 runs in Fast mode if the SYNC pin is permanently high. In this mode, the QT1010 runs at

maximum speed at the expense of increased current consumption. Fast mode is useful when speed of

response is the prime design requirement. The delay between bursts (= touch scans) in Fast mode is

approximately 1 ms.

3.2.2 Low-Power Mode

The QT1010 runs in Low-Power (LP) mode if the SYNC pin is held low. In this mode, it sleeps for

approximately 80 ms at the end of each burst, saving power but slowing response. On detecting a

possible key touch, it temporarily switches to Fast mode until either the key touch is confirmed or found to

be spurious (via the detect integration process). It then returns to LP mode after the key touch is

resolved.

3.2.3 Sync Mode

It is possible to synchronize the device to an external clock source by placing an appropriate waveform

on the SYNC pin. SYNC mode can synchronize multiple QT1010 devices to each other to prevent cross-

interference, or it can be used to enhance noise immunity from low-frequency sources such as 50 Hz or

60 Hz mains signals. The SYNC pin is sampled at the end of each burst.

AT42QT1010

User Guide

4. Documentation and Relevant Links

Software/IDE

• Microchip Touch Design Center:

http://www.microchip.com/design-centers/capacitive-touch-sensing

• Microchip MPLAB + MCC:

http://www.microchip.com/mplab/mplab-x-ide

http://www.microchip.com/MCC

• Atmel Studio + Start:

http://www.microchip.com/mplab/avr-support/atmel-studio-7

http://www.microchip.com/START

• Data Visualizer:

https://gallery.microchip.com/packages/AtmelDataVisualizerInstaller-Standalone/

Turnkey Touch Devkits

• Turnkey Evaluation Kits:

– CAP1188 Evaluation Kit

http://www.microchip.com/DevelopmentTools/ProductDetails/PartNo/dm160222

– CAP1298 Evaluation Kit

http://www.microchip.com/DevelopmentTools/ProductDetails/PartNo/dm16022

– MTCH108 Evaluation Board

http://www.microchip.com/DevelopmentTools/ProductDetails/PartNo/dm160229

Design Documentation:

Package containing CAD source, schematics, BOM, assembly drawings, 3D plots, layer plots, etc.

Hardware User's Guide:

PDF version of this user's guide.

AT42AT1010 Kit on Microchip Page:

Microchip website link.

AT42QT1010

Documentation and Relevant Links

5. Hardware Revision History and Known Issues

5.1 Identifying Product ID and Revision

Kits have stickers that have the identifier and revision printed in plain text as A09-nnnn/rr, where 'nnnn' is

the identifier and 'rr' is the revision. Boards with limited space have a sticker with only a data matrix code,

which contains a serial number string.

The serial number string has the following format:

"nnnnrrssssssssss"

n = product identifier

r = revision

s = serial number

The product identifier for the AT42QT1010 Evaluation Kit is A09-3207.

5.2 Revision 4

Revision 4 of AT42QT1010 (A09-3207/04) is the initial released version. There are no known issues.

AT42QT1010

Hardware Revision History and Known Issues

6. Document Revision History

Document Revision Date Comment

A 09/2018 Initial release of document

AT42QT1010

Document Revision History

The Microchip Web Site

Microchip provides online support via our web site at http://www.microchip.com/. This web site is used as

a means to make files and information easily available to customers. Accessible by using your favorite

Internet browser, the web site contains the following information:

•Product Support – Data sheets and errata, application notes and sample programs, design

resources, user’s guides and hardware support documents, latest software releases and archived

software

•General Technical Support – Frequently Asked Questions (FAQ), technical support requests,

online discussion groups, Microchip consultant program member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip press releases,

listing of seminars and events, listings of Microchip sales offices, distributors and factory

representatives

Customer Change Notification Service

Microchip’s customer notification service helps keep customers current on Microchip products.

Subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata

related to a specified product family or development tool of interest.

To register, access the Microchip web site at http://www.microchip.com/. Under “Support”, click on

“Customer Change Notification” and follow the registration instructions.

Customer Support

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor, representative or Field Application Engineer (FAE) for support.

Local sales offices are also available to help customers. A listing of sales offices and locations is included

in the back of this document.

Technical support is available through the web site at: http://www.microchip.com/support

Microchip Devices Code Protection Feature

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the

market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of

these methods, to our knowledge, require using the Microchip products in a manner outside the

operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is

engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

AT42QT1010

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their

code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the

code protection features of our products. Attempts to break Microchip’s code protection feature may be a

violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software

or other copyrighted work, you may have a right to sue for relief under that Act.

Legal Notice

Information contained in this publication regarding device applications and the like is provided only for

your convenience and may be superseded by updates. It is your responsibility to ensure that your

application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY

OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS

CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE.

Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life

support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend,

indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting

from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual

property rights unless otherwise stated.

Trademarks

The Microchip name and logo, the Microchip logo, AnyRate, AVR, AVR logo, AVR Freaks, BitCloud,

chipKIT, chipKIT logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq,

Kleer, LANCheck, LINK MD, maXStylus, maXTouch, MediaLB, megaAVR, MOST, MOST logo, MPLAB,

OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip Designer, QTouch, SAM-BA, SpyNIC, SST,

SST Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are registered trademarks of Microchip Technology

Incorporated in the U.S.A. and other countries.

ClockWorks, The Embedded Control Solutions Company, EtherSynch, Hyper Speed Control, HyperLight

Load, IntelliMOS, mTouch, Precision Edge, and Quiet-Wire are registered trademarks of Microchip

Technology Incorporated in the U.S.A.

Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom,

CodeGuard, CryptoAuthentication, CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM,

dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming,

ICSP, INICnet, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, memBrain, Mindi, MiWi,

motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient

Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE,

Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total

Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are

trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries.

GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of

Microchip Technology Inc., in other countries.

All other trademarks mentioned herein are property of their respective companies.

AT42QT1010

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