Microchip Technology mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

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mTouch™ Advanced Capacitive

Evaluation Kits

User’s Guide

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mTouch™ ADVANCED CAPACITIVE EVAL-

UATION KITS USER’S GUIDE

Table of Contents

Preface ........................................................................................................................... 5

Introduction............................................................................................................5

Document Layout.................................................................................................. 5

Conventions Used in this Guide............................................................................6

Warranty Registration............................................................................................7

Recommended Reading........................................................................................7

The Microchip Web Site...................................................................................... 10

Development Systems Customer Change Notification Service .......................... 10

Customer Support...............................................................................................11

Document Revision History.................................................................................11

Chapter 1. Introduction to the Evaluation Boards

1.1 Overview ......................................................................................................13

1.2 Operational Requirements ...........................................................................15

1.3 Initial Board Setup ........................................................................................ 16

Chapter 2. Demonstration Application

2.1 Introduction to the Touch Interface ...............................................................17

2.2 Individual Touch Sense Demonstrations ...................................................... 18

Chapter 3. Using the mTouch™ Sensing Solution

3.1 About the mTouch Sensing Solution Diagnostic Tool .................................. 21

3.2 MPLAB IDE integrated mTouch Diagnostic Tool GUI ..................................21

Chapter 4. Evaluation Board Hardware

4.1 Application Functional Overview .................................................................. 27

4.2 Board Components ......................................................................................32

4.3 Interfacing to the Evaluation Boards ............................................................38

Chapter 5. Troubleshooting

5.1 Common Issues ...........................................................................................41

Appendix A. Evaluation Board Schematics Appendix B. mTouch™ PIC16F CSM State Diagrams

Index .............................................................................................................................53

Worldwide Sales and Service ....................................................................................54

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

mTouch™ ADVANCED CAPACITIVE

EVALUATION KITS USER’S GUIDE

Preface

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

INTRODUCTION

This chapter contains general information that will be useful to know before you use an mT ouch™ Advanced Ca pacitive Evaluation Kit. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• Warranty Registration

• Recommended Reading

• The Microchip Web Site

• Development Systems Customer Change Notification Service

• Customer Support

• Document Revision History

IDE online help.

DOCUMENT LAYOUT

This document describes how to use an mT ouch Advanced Capacitive Evaluation Kit as a development and demonstrative tool for PIC16F, PIC18F, PIC24F, PIC24H and PIC32MX MCU device capabilities and features. The document layout is as follows:

• Chapter 1. Introduction to the Evaluation Boards – This chapter introduces the mTouch Advanced Capacitive Evaluation Kits and provides an overview of their features.

• Chapter 2. Demonstration Application – This chapter describes the preprogrammed capacitive touch sense demonstration application.

• Chapter 3. Using the mTouch™ Sensing Solution – This chapter describes the diagnostic software and how to use it with an mTouch Advanced Capacitive Evaluation Kit.

• Chapter 4. Evaluation Board Hardware – This chapter provides a functional overview of the mTouch Advanced Capacitive Evaluation Kits and identifies the major hardware components.

• Chapter 5. Troubleshooting – This chapter provides troubleshooting tips for commonly encountered issues.

• Appendix A. “Evaluation Board Schematics” – This appendix provides

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

detailed schematic diagrams of the evaluation boards.

• Appendix B. “mTouch™ PIC16F CSM State Diagrams” – This appendix provides PIC16F CSM state diagrams.

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB® IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

Choice of mutually exclusive arguments; an OR selection

Represents code supplied by user

“Save project before build”

any valid filename

[options] errorlevel {0|1}

var_name...] void main (void)

{ ... }

WARRANTY REGISTRATION

Please complete the enclosed Warran ty Registration Card and mail it promptly. Sending in the Warranty Registration Card entitles you to receive new product updates. Interim software releases are available at th e Microchip web site.

Chapter 1. Introduction to the Evaluation Boards

Thank you for purchasing a Microchip Technology mTouch Advanced Capacitive Evaluation Kit. Depending on the kit purchased, up to four individua l evaluation boards are provided. These ev aluation boards a re inten ded to intr od uce a nd de mon strate the possibilities for capacitive touch sense applications on the PIC16F, PIC18F, PIC24F, (DM183026-2 kit), PIC24H (AC243026 kit) and PIC32MX microcontroller platforms.

Note: This Evaluation Kit is intended as a functional evaluation of Microchip’s

mTouch Capacitive Sensing Solutions. It has not been designed for use in noisy or production - level testing environment. Please refer Microchip Application Notes for guidelines when attempting to design a product to be used or deployed in such environments.

This chapter introduces the evaluation kits and provides an overview of th eir features. Topics covered include:

•Overview

• Operational Requirements

• Initial Board Setup

1.1 OVERVIEW

The mTouch Advanced Capacitive Evaluation Kits provide a simple platform for developing a variety of capacitive touch sense applications. Depending on the kit purchased, up to four evaluation boards are included with PIC16F, PIC18F, PIC24F, PIC24H and PIC32MX microcontrollers, with four sensor daughter boar ds, as shown in Figure 1-1 and Figure 1-2.

These evaluation kits are intended to be used to develop a capacitive touch sense application using Microchip’s mTouch technologies. A kit is used by first connecting a sensor board, and then supplying power to the board via USB, PICkit™ 3 or the PICkit Serial Analyzer . The connector, J3/J4, with numbers from 0 to 15, is the connector for sensing channels. The numbers, from 0 to 15 for PIC16F, PIC24F, PIC24H and PIC32MX, and from 0 to 12 for PIC18F, represents the microcontroller’s sensing channel. The vertical 2-row header is for debugging, to give easy access to some of the microcontroller pins. Debugging may also be done by Microchip programmers and the I

When using an evaluation kit out of the box, the default function of the LEDs is to illuminate on a key press. All functionalities may be reprogrammed by using a Microchip programmer and reprogramming the firmware in the device. The firmware supplied with the evaluation kit is optimized to use with the four sensor boards supplied.

The USB connection supplies power to the board; no additional external power supply is needed. For independent operation, the ev al ua ti o n board may be discon nected from the PC and powered at test points. For the PIC18F, PIC24F and PIC32MX evaluation boards, the USB also provides communications with the MPLAB mTouch Diagnostic Tool. The PIC16F and PIC24H evaluation boards use the PICkit Serial Analyzer to communicate via I monitor the performance of the touch sensors and to optimize the sensor response. A separate, 6-wire programming interface allows users to replace the preprogrammed

C™ or USB is used to communicate with the mTouch diagnostic tool.

C to the PC. The MPLAB mTouch application allows users to

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

demonstration firmware with their own applications using Microchip’s MPLAB Integrated Development Environment (IDE) and In-Circuit Serial Programming™ (ICSP™). This allows the board to also be used as a test platform for capacitive touch sense applications.

1.1.1 mTouch Advanced Capacitive Evaluation Kit Contents

The mT ou ch Advanced Capacitive Evaluation Kit (D M183026-2) contains th e following items:

• PIC16F CSM Evaluation Board

• PIC18F CVD/CSM Evaluation Board

• PIC24F CTMU Evaluation Board

• PIC32MX CVD Evaluation Board

• 12-Key Matrix Sensor Daughter Board

• 4-Channel Slider Sensor Daughter Board

• 2-Channel Slider Sensor Daughter Board

• 8-Key Direct Sensor Daughter Board

• PICkit Serial Analyzer

• USB Cable

FIGURE 1-1: mTouch™ ADVANCED CAPACITIVE EVALUATION KIT

CONTENTS

Introduction to the Evaluation Boards

1.1.2 PIC24H Capacitive Touch Evaluation Kit Contents

The PIC24H Capacitive Touch Evaluation Kit (AC243026) contains the following items:

• PIC24H CVD Evaluation Board

• 8-Key Direct Sensor Board

• 12-Key Matrix Sensor Board

• 4-Channel Slider Sensor Board

• 2-Channel Slider Sensor Board

• PICkit Serial Analyzer

• USB Cable

FIGURE 1-2: PIC24H CAPACITIVE TOUCH EVALUATION KIT CONTENTS

1.2 OPERATIONAL REQUIREMENTS

T o communicate with , and to program an evaluation board, the following hardwa re and software requirements must be met:

• PC-compatible system with a CD-ROM drive

• One available USB port on the PC or a powered USB hub

•Microsoft

Windows® XP SP2, Windows 7, or Windows Vista (32-bit)

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

1.3 INITIAL BOARD SETUP

With its pre-installed demonstration a pplication, the evaluation board is designed to be used straight out of the box. Except for a single connection to a computer , no additional hardware or configuration is necessary.

1.3.1 Installing the Software

Before connecting the eva lu at ion board to any computer for th e first time, it is important to install the PC software found on the accompanying CD first. This ensures that the proper USB drivers for communicating with the e valu ati on board are in stalled and ready to recognize the board.

To install the software and driver, insert the evaluation kit CD into the CD-ROM drive. The installation process starts automatically. The process pauses for user responses to accept the Microchip software licenses, and to confirm the installation directories; you must accept the license to use the software.

1.3.2 Connecting the Hardware

Prior to connection, place the evaluation board on a flat surface near the computer. Check to make sure that there are no objects underneath the board. Once the evaluation kit sof tware is installed, connect the provided USB cable (A to mini-B) to any available USB port on the PC or powered hub, and then to the board at the mini-B receptacle. The PC USB connection provides power to the board.

The PIC24F and PIC18F CTMU and PIC32MX Capacitive Voltage Divider (CVD) evaluation boards use the USB connection to power up the boards and also to communicate with the mTouch diagnostic tool. The PIC16F Cap Sense Module (CSM) and PIC24H CVD evaluation boards use the PICkit Serial Analyzer to communicate to the PC. Connect the USB cable to the PICkit Serial Analyzer, and connect it to the J2 connector on the board and the PC’s USB port. The default code uses the 8-button board.

When connecting the PIC24F and PIC18F CTMU and PIC32MX CVD boards, a sequence of pop-up messages should appear in the system tray (lower right of the desktop), stating that (1) new hardware has been fou nd, (2) drivers ar e being inst alled and (3) the new hardware is ready for use. If you do not see these messages and the eval u at io n board does not work, try u nplugging and reconnecting th e USB cable. If this does not work, see Chapter 5. “Troubleshooting”.

mTouch™ ADVANCED CAPACITIVE

EVALUATION KITS USER’S GUIDE

Chapter 2. Demonstration Application

This chapter describes the touch sense application that is preprogrammed on the PIC16F, PIC18F, PIC24F, PIC24H and PIC32MX microcontrollers, and its general principles of operation. Topics included in this chapter are:

• Introduction to the Touch Interface

• Individual Touch Sense Demonstrations

2.1 INTRODUCTION TO THE TOUCH INTERFACE

For PIC24H and PIC32MX MCUs, touch sensing is achieved using a technique known as the Capacitive Volt age Divider, which makes use of the ADC module. This technique is based on successive charging/discharging cycles for sample and hold capacitance and conversely, sensor plus finger capacitance, which basically cr eates a voltage divider. For details, refer the application note, AN1298 “Capacitive Touch Using Only an ADC (“CVD”)” .

Control of the touch sense features is built on the PIC18F and PIC24F microcontrollers’ on-chip Charge Time Measurement Unit (CTMU) module. The CTMU consists of a constant current source that charges each touch circuit to a voltage level. When any additional capacitance is added to the circuit (from the touch of a fingertip, for example), the fixed current source will now charge the circuit to a lower voltage. This change is how the microcontroller detects a touch event. For detailed information on the CTMU module, please refer to the related “Charge Time Measurement Unit (CTMU)” Family Reference Manual sections, which are available from the Microchip web site.

On the PIC16F CSM Evaluation Board, the on-chip Cap Sense Module (CSM) creates a relaxation oscillator to perform touch sensing. The period or frequency of the relaxation oscillator can be measured, and when the sensor is touched, the frequency will drop and the period will increase, indicating a touched condition.

The microcontrollers use the CTMU, CVD or CSM to monitor it s input channels, which are in turn, connected to capacitive touch pad sensors on the top layer of the circuit board.

The evaluation board has four different sensor demonstration boards:

• 8-Key Direct Plug-in Daughter Board

• 12-Key Matrix Plug-in Daughter Board

• 2-Channel Slider Plug-in Daughter Board

• 4-Channel Slider Plug-in Daughter Board A more detailed description of the e valuation boards ’ operation is pr ovided in Chapter

4. “Evaluation Board Hardware”.

2.1.1 Touch Sensitivity

The response of the sensor to fingertip touch is influenced by many factors: touch areas, voltage and current levels, ambient humidity, static buildup, and so on. The capacitive touch sensing is done by a relative shift in the capacitance due to the addition of the finger capacitance to the touch sensor. The demonstration code supplied takes most of the typical environmental factors into consideration. The demonstration application is very flexible in the sense that it can be modified by the user.

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

The PC-side application accompanying the mTouch Advanced Capacitive Evaluation Kit can be used to change the sensitivity of the sensors by writing trip point information back to the board.

2.1.2 Sensor Persistence

By design, the demonstration application is designe d to res po nd to a state chan ge event on any sensor. More simply, they respond to a touch, and not to a touch and release. This behavior, along with the firmware’s slow averaging algo rithm that accounts for constant changes in the evaluation board’s environment, causes a continuous touch on one or more sensors to yield an affirmative response for a few seconds, followed eventually by no response at all. Removing the touch stimulus from the sensor resets the algorithm and restores the sensor’s responsiveness.

2.2 INDIVIDUAL TOUCH SENSE DEMONSTRATIONS

2.2.1 8-Key Direct Plug-in Daughter Board

The Direct Key Plug-in daughter board is an 8-channel plug-in board with one key directly mapped to one channel. This can be interfaced with any of the 8 channels of the 16 channels provided in the mT ouch Advanced Capacitive Evaluation Kit. Touching any one of the keys on the plug-in board will light up the corresponding LED in the evaluation board.

The LEDs, D8 to D15 of the ev a l u at i o n board , correspond to the dir ect keys numbered from ‘8’ to ‘F’, respectively, in the Direct Key Plug-in daughter board.

The default firmw are loade d in the mTouch Advanced Capacitive Evaluation Kit is configured for channels 8 to 15 in PIC16F CSM, PIC24F CTMU, PIC24H CVD and PIC32MX CVD evaluation boards, and channels 0 to 7 in PIC18F CTMU Evaluation Boards.

When the key numbered ‘8’ is pressed, the LED D8 will be lit. Similarly, when keys, ‘9’ through ‘F’, are pressed, the LEDs, D9 through D15, will be lit. Here, one LED will be lit for every press key on the plug-in board (see Figure 2-1).

FIGURE 2-1: DEFAULT PLUG-IN CHANNELS FOR 8-KEY PLUG-IN BOARD

Demonstration Application

2.2.2 12-Key Matrix Plug-in Daughter Board

The Matrix Key Plug-in daughter board is an array of 12 touch-sensitive keys a rranged in a 4x3 matrix. Touching any one of the keys will light up one of the LEDs. Here, the Matrix Key Plug-in daughter board is numbered, 0 to 11, which corresponds to LEDs D1 to D12, respectively.

The default firmware loaded in the mTouch Advanced Cap acitive Evaluation Kit for the Matrix Key Plug-in daughter board is configured fo r chann els 8 to 14 in PIC16 F CSM, PIC24F CTMU, PIC24H CVD and PIC32MX CVD evaluation boards, and channels 6 to 12 in PIC18F CTMU evaluation boards.

When the key numbered ‘0’ is pressed, the LED D1 will be lit. Similarly, when the keys numbered ‘1’ to ‘11’ are pressed, the LEDs D2 through D12 will be lit, respectively. Here, one LED will be lit for every press of the key on the plug-in board.

2.2.3 2-Channel and 4-Channel Slider Plug-in Daughter Board

Touching anywhere along the length of the slider causes all the LEDs to light up as a bar graph that is representative to the position of the touch. The LED bar graph follows the finger as it moves up and down along the length of the slider, and remains at the last position on the slider when the finger is removed.

The default firmware for the 2-Channel Slider Plug-in, loaded in the evaluation kit, is configured such that, the channels 0 and 1 of connector J4/J3 in the e v a l u a t i o n k i t are connected to the 2-Channel Slider Plug-in daughter board.

The default firmware for the 4-Channel Slider Plug-in, loaded in the evaluation kit, is configured such that, channels 0, 1, 2 and 3 of connector J4/J3 in the main evaluatio n board are connected to the 4 channels in the 4-Channel Slider Plug-in da ughter board (see Figure 2-2).

FIGURE 2-2: DEFAULT PLUG-IN CHANNELS FOR 4-CHANNEL SLIDER

PLUG-IN BOARD

Note 1: The plug-in boards can be interfaced to any of the channels in the

evaluation kit by changing the configuration settings. The details of the configuration settings are explained in the Readme.txt file, which is distributed in each demonstration.

2: Plugging a sensor board in while an evaluation board is running, may

require resetting the touch algorithm, most easily done by cycling power.

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

FIGURE 2-3: PLUG IN THE SENSORS BEFORE POWERING BOARD

FIGURE 2-4: PLUG IN POWER AFTER SYSTEM IS CONFIGURED

mTouch™ ADVANCED CAPACITIVE

EVALUATION KITS USER’S GUIDE

Chapter 3. Using the mTouch™ Sensing Solution

This chapter describes the Graphical User Interface (GUI) diagnostic tool, mTouch™ sensing solution, that accompanies the evaluation boards in the mTouch Capacitive Eval ua ti on Kits, and how it can be used in de veloping and troubleshooting touch sense applications. Topics include:

• About the mTouch Sensing Solution Diagnostic Tool

• MPLAB IDE integrated mTouch Diagnostic Tool GUI

3.1 ABOUT THE mTouch SENSING SOLUTION DIAGNOSTIC TOOL

The touch sensing solution is a multi-purpose application that has been designed for use with many of Microchip’s touch sense demonstrations. The software provides a useful tool for viewing, adjusting and debugging various aspects of the demonstration software preloaded on the evaluation boards. The touch sensing solution can also be used for developing customized applications.

Initially the diagostic tool was developed as a standalone GUI and lately it is integrated into the MPLAB IDE. The latest version integrated with MPLAB IDE is backward compatible with the standalone GUI so that older embedded firmware can be run successfully. Note that, some of the additional enhancements may constraint the newer embedded firmware developed in conjunction with the latest GUI integrated with MPLAB IDE from correct functioning on the older standalone GUI.

The following sections describes the MPLAB IDE integrated mTouch Diagonistic Tool GUI. These sections also list the embedded firmware that are successfully tested on this platform.

The operation of the touch sensing solution described here is specific to its use with the evaluation boards. For use with other Microchip applications, refer to the specific application’s user’s guide.

3.2 MPLAB IDE INTEGRATED mTOUCH DIAGNOSTIC TOOL GUI

This section describes the MPLAB IDE integrated mTouch Diagnostic Tool GUI features.

The following firmware items from the mTouch Advanced Capacitive Evaluation Kit (DM183026) were tested using this GUI:

• PIC16F CSM Evaluation Board

• PIC18F CTMU Evaluation Board

• PIC24F CTMU Evaluation Board

• PIC32MX CVD Evaluation Board The firmware for PIC24H CVD Evaluation Board was also tested using this GUI.

3.2.1 USING THE MPLAB IDE INTEGRATED mTOUCH DIAGNOSTIC TOOL GUI

Before starting the mTouch sensing solution diagnostic tool, ensure that the evaluation board is connected to a USB port on a p ersonal computer (or a USB hu b connected to the computer) and that the evaluation board is operating normally.

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

T o start the mTouch Diagnostic T ool, select the homonymous item from MPLAB>Tools. The GUI child window launches, as shown in Figure 3-1.

FIGURE 3-1: THE mTOUCH™ SENSING SOLUTION AT START-UP

(MPLAB

IDE)

At the bottom left of the mTouch Diagnostic T ool window is the histogram window , which is used to display the status of the individual sensors or channels selected for the hardware and subsystem. On the right side of this graph there are multiple sensor selection checkboxes. Select the appropriate sensor number so that unused ones are removed from the resulting histogram.

On the bottom right there is the status and settings sections of this GUI - which contains two tabs - Settings and Touch Status. The Touch Status tab en able visualization of the pressed button with the specific Board shape as selected in the Settings tab.

Click the Settings button in the Settings tab to display the window, as shown in Figure 3-2.

Using the mTouch™ Sensing Solution

FIGURE 3-2: THE mTOUCH™ DIAGNOSTIC TOOL - BOARD SETTINGS

(MPLAB

IDE)

The Settings window contains the possible setup for the hardware and subsystem selected - contained in 3 tabs: Board, Communication and Logging.

The Board tab contains:

• Select Board drop down box: By default mTouch2 board is selected. Other

options in the drop down box includes mTouch 1 and 2 hardware, the mTouch EVAL KIT hardware and the Custom board.

• Area of the Board: This contains the options for selecting the shape/type of the

sensed buttons.

• Custom board: This selects the number of sensor disposed onboard.

• Trip section: Select the ‘’GUI Value’’, when values for trip level for each sensor

are calibrated online from host, or select ‘’Firmware Value’’ if value for trip is contained in firmware. Trip Firmware Value is provided by the evaluation board's firmware, using an algorithm that calculates the optimum trip values based on the average value. These values are sent to the mTouch Diagnose Tool through the USB/I2C/UART connection, and are constantly updated and displayed on the bar graphs; this is enabled by default. When selecting GUI Values, the trip levels are calibrated from host and sent to the embedded firmware by USB/I2C/UAR T which takes them into account for internal calculations.

The Communication tab as shown in Figure 3-3 contains:

• Protocol selection section: This contains settings for USB (VID and PID selec-

tion), I2C (Slave Address) and UART (Port and Baud Rate). Choose one option only by selecting the appropriate radio button.

• PICkit Serial Setting: This contains the options - Provides Power and Supplied

Voltage.

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

FIGURE 3-3: THE mTOUCH™ DIAGNOSTIC TOOL - COMMUNICATION

SETTINGS (MPLAB

IDE)

The Logging tab, as shown in Figure 3-4, includes the settings typical for logging data such as data contained by the log, destination file and data delimiter.

FIGURE 3-4: THE MTOUCH™ DIAGNOSTIC TOOL - LOGGING SETTINGS

(MPLAB

IDE)

Using the mTouch™ Sensing Solution

Click OK to close the Settings window and to disp lay the setup in th e Settings tab. To actually use the logging, check the Log checkbox in the Settings tab (the setup made previously will be used for logging).

The upper part of the mTouch Diagnostic Tool window contains the status display for each of the sensors in form of a bar graph. Above each bar graph display is an indicator; this lights up (changes to light green) when the software detects a touch event. The bar graph shows the sensor's current state in terms of the A/D conversion value of its channel. Values shown may be in the range of 0 to 65,535 and are dimensionless.

Each bar graph has the following information:

• A constantly moving orange vertical bar that indicates the instantaneous

conversion value

• A blue horizontal indica tor across the bar that indicates the moving aver age of the

touch sensor

• A green horizontal indicator that shows the trip level that the touch channel must

reach to become pressed or activated

• The average and raw conversion values, displayed numerically at the bottom of

the bar graph

A color key for the indicators is provided at the top of the mTouch Diagnostic Tool window.

The A/D converter produces values of up to 4096 (12 bits). The evaluation board contains software algorithms that use scaled values of the raw A/D reading to improve averaging and overall performan c e of the har dw ar e.

Right click on the bar graph for each sensor to display menu options: Display Data, Zoom Settings and Sensor Settings.

FIGURE 3-5: THE mTOUCH™ DIAGNOSTIC TOOL - DISPLAY DATA

SETTINGS (MPLAB

Selecting Display Data option will display a Display Data dialog containing the settings for data visualization, as shown in Figure 3-5. The Data Type can be selecte d between ‘’Raw’’ and ‘’Working’’ where Raw data represents working data values divided by 16. The Display Data settings can be applied to the sensor selected or to all sensors.

IDE)

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

FIGURE 3-6: THE mTOUCH™ DIAGNOSTIC TOOL - ZOOM SETTINGS

(MPLAB

Select Zoom Settings option to display the Zoom Settings dialog, as shown in Figure 3-6. This enables settings for zooming in the bar graph. There are two available zoom levels, which once set can be easily accessed from the GUI main window by pressing the corresponding shortcut buttons situated at the bottom of each bar graph (Z1, Z2). As for Display Data settings there is a possibility to set the setup zoom levels for the current sensor or for all sensors at once.

FIGURE 3-7: THE mTOUCH™ DIAGNOSTIC TOOL - SENSOR SETTINGS

(MPLAB

IDE)

Select the Sensor Setting option to select the trip level from which a button can be indicated as pressed. The ‘’Trip Value’’ can only be set if Trip GUI value is selected in the Settings window, if not, the error "Trip Value Can't be Set!, Change Settings to GUI Trip" is displayed.

mTouch™ ADVANCED CAPACITIVE

PIC16F1937

USB mini-B

Receptacle

Matrix Key

ICSP™

VDD

ICSPDAT ICSPCLK

MCLR

7-Channel

Programming

Header

CPS15:0

4-Channel

Slider Plug-in

Direct Key Slider

8-Channel

2-Channel

16 LEDs (D1-D16)

Sensor Boards

Board

Plug-in Board

Slider Plug-in

Board

BoardPlug-in

PLUG-IN BOARDS

PIC16F CSM/CVD EVALUATION BOARD

Serial Header

I2C PICkit™

I2C™

VDD VSS

GPIO

Vss

EVALUATION KITS USER’S GUIDE

Chapter 4. Evaluation Board Hardware

This chapter provides a functional overview of the evaluation boards and identifies the major hardware components. Topics covered include:

• Application Functional Overview

• Board Components

4.1 APPLICATION FUNCTIONAL OVERVIEW

4.1.1 PIC16F CSM/CVD Evaluation Board

For the PIC16F CVD/CSM board, ICSP lines are provided via a PICkit2 header . A mini USB adaptor is available for power . The PICkit Serial Analyzer may be used to communicate with the mTouch GUI through I2C. For this board, do not use both USB and PICkit tools to power the board. The USB connection has a 3.3V regulator afterwards to regulate the USB power and PI Ckit tools have their own regulator straight to the device. ICSPCLK and ICSPDAT share pins with active-low LEDs (D6 and D7) which can cause problems when debugging. T o use in-ci rcuit serial debugging, remove jumper J4 to disconnect these two LEDs.

FIGURE 4-1: PIC16F CSM/CVD EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

PIC18F46J50

USB mini-B Receptacle

Key Plug-in

ICSP™

D+/D-

PGC/EMUC PGD/EMUD MCLR

7-Channel Matrix

Programming

Header

AN0:AN15

4-Channel

Slider Plug-in

Power Supply

RD0-RD7

Direct Key

8-Channel

2-Channel

16 LEDs (D1-D16)

D8-D15

Direct Key Plug-in

D1-D12

Matrix Key Plug-in

D1-D16

2-Channel and

4-Channel Slider

Plug-in LEDs

Board

Slider Plug-in

Board

Plug-in Board

Board LEDs

(3.3V)

PLUG-IN BOARDS

PIC18F CTMU EVALUATION BOARD

4.1.2 PIC18F CTMU Evaluation Board

The PIC18F CTMU Evaluation Board (see Figure 4-2) is similar to the PIC24F CTMU Evaluation Board except for the change in the number of ADC channels. The PIC18F46J50 microcontroller on the PIC18F CTMU Evaluation Board has 13 ADC channels, which are used by the touch sense application as the sensing channels.

Note: PIC18F CTMU Evaluation Board firmware uses only 13 channels for to uch

sense applications and Channels 13 to 15 are unused in the PIC18F CTMU board.

Microcontroller and LED power are provided from the V voltage regulator. Provisions on the board allow for the users to add components and create an externally powered application.

Note: Unlike the PIC24F CTMU Evaluation Board, the ICD interface (PGC and

PGD) on the PIC18F Evaluation Board does not share with any of the CTMU channels.

BUS by Q1, an MCP1702

FIGURE 4-2: PIC18F CTMU EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

Evaluation Board Hardware

PIC24FJ128GB106

USB mini-B Receptacle

Key Plug-in

ICSP™

D+/D-

PGC/EMUC PGD/EMUD MCLR

7-Channel Matrix

Programming

Header

AN0:AN15

4-Channel

Slider Plug-in

Power Supply

RE0:RE7

RD0-RD7

Direct Key

8-Channel

2-Channel

16 LEDs (D1-D16)

D8-D15

Direct Key Plug-in

D1-D12

Matrix Key Plug-in

D1-D16

2-Channel and

4-Channel Slider

Plug-in LEDs

Board

Slider Plug-in

Board

BoardPlug-in

Board LEDs

(3.3V)

PLUG-IN BOARDS

PIC24F CTMU EVALUATION BOARD

4.1.3 PIC24F CTMU Evaluation Board

The operation of the PIC24F CTMU Evaluation Board (see Figu re 4-3) is managed by the PIC24F microcontroller , which require s very little additional hardware to perform its tasks. In addition to the touch sense demonstration application code, the preloaded demonstration uses substantial parts of the Microchip USB Stack Library to provide a hardware interface to the PC-based mTouch sensing solution diagnostic tool.

FIGURE 4-3: PIC24F CTMU EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

The touch sense application uses the PIC24F microcontroller’s CTMU and all 16 of the microcontroller’s A/D input channels to monitor the touch interfaces. The CTMU functions by sensing small changes in capacitance on its inputs, such as those occurring when a person touches the copper pad electrodes. By continuously monitoring for these changes, the CTMU can determine when a touch event occurs. The sensors on the evaluation board comprise carefully placed circuit traces and capacitive touch pads.

The evaluation board comprises 16 A/D channels of the PIC24F microcontroller connected to connector, J4/J3. This connector is used to interface the plug-in boards to the evaluation board.

The plug-in boards can be connected to any of the 16 channels of the connector (14) by changing the configuration settings, which is explained in the Readme.txt file.

A total of 16 LEDs are provided in the evaluation board. These LEDs are driven directly by the microcontroller through pins on PORTD and PORTE. When an event occurs, the application firmware also provides feedback by activating one or more LEDs at that location. The sequence for the activation of the LEDs depends on the type of touch pads that is interfaced to the evaluation board.

The microcontroller uses its on-chip USB engine and transceiver to communicate to the PC side interface application, using the USB mini-B receptacle. The evaluation board also uses the USB receptacle for application power as a bus-powered device. Microcontroller and LED power are provided from the V voltage regulator. Provisions on the board allow for users to add components and

BUS by Q1, an MCP1702

create an externally powered application.

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

PIC24HJ128GP506

USB mini-B

Receptacle

Matrix Key

ICSP™

VDD

ICSPDAT ICSPCLK

MCLR

7-Channel

Programming

Header

AN0-AN15

4-Channel

Slider Plug-in

Direct Key Slider

8-Channel

2-Channel

16 LEDs (D1-D16)

Sensor Boards

Board

Plug-in Board

Slider Plug-in

Board

BoardPlug-in

PLUG-IN BOARDS

PIC24H CVD EVALUATION BOARD

Serial Header

I2C PICkit™

I2C™

VDD VSS

GPIO

Vss

For users interested in using the evaluation board as an experimental platform, the microcontroller can be reprogrammed using the ICSP connector. A 6-pin header is provided for connecting the evaluati on board to an y MPL AB ICD 2 com patible programmer. Since the ICD interface (PGD and PGC) shares some input channels of the connector, J4/J3 (channel 6 and 7), necessary care should be taken when the debugger is enabled.

The firmware in the evaluation board will have the default plug-in board channel configurations, which is explained in the Readme.txt file. The user can reconfigure the channels based on his application by refer ring to the Readme.txt file.

4.1.4 PIC24H CVD Evaluation Board

The PIC24H CVD Evaluation Board (see Figure 4-4) is based on the same layout as the PIC24F CTMU and PIC32MX CVD evaluation boards and has similar functional characteristics as the PIC16F CSM evaluation board (I

This board do not use USB and a PICkit to power the board. The USB has a 3.3V regulator to regulate the USB power and the PICkit tools have their own regulator straight to the device VDD; so, choose one or the other.

FIGURE 4-4: PIC24H CVD EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

C interface with host).

Evaluation Board Hardware

PIC32MX795F512H

USB mini-B Receptacle

Key Plug-in

ICSP™

D+/D-

PGC/EMUC PGD/EMUD MCLR

7-Channel Matrix

Programming

Header

AN0:AN15

4-Channel

Slider Plug-in

Power Supply

RE0:RE7

RD0-RD7

Direct Key

8-Channel

2-Channel

16 LEDs (D1-D16)

D8-D15

Direct Key Plug-in

D1-D12

Matrix Key Plug-in

D1-D16

2-Channel and

4-Channel Slider

Plug-in LEDs

Board

Slider Plug-in

Board

BoardPlug-in

Board LEDs

(3.3V)

PLUG-IN BOARDS

PIC32MX CVD EVALUATION BOARD

4.1.5 PIC32MX CVD Evaluation Board

The PIC32MX CVD Evaluation Board (see Figure 4-5) is similar to the PIC24F CTMU Evaluation Board. The user interface look and feel do not differ, while the evaluation board layout is almost identical due to the fact that the PIC32MX795F512H and PIC24FJ128GB106 are pin-to-pin compatible. The four dau ghter boards are connected to the J3/J4 connectors in the same manner. As for functionality, the PIC32MX CVD evaluation board has 15 LEDs to indicate touch sensing while the USB interface is used for communicating with the host application for visualization and diagnostic.

A major difference between the PIC24F CTMU and the PIC32MX CVD evaluation boards is the PIC32MX CVD uses the ADC module for ca pacitive touch sensing , while the PIC24F CTMU uses the dedicated CTMU module.

FIGURE 4-5: PIC32MX CVD EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

4.2 BOARD COMPONENTS

4.2.1 PIC16F CSM/CVD Evaluation Board

Figure 4-6 identifies the key hardware components that are common for the PIC16F CSM/CVD evaluation board. There is one evaluation board and four plug-in daughter boards. The four plug-in daughter boards are identified as direct keys, matrix keys, 2-channel slider and 4-channel slider.

FIGURE 4-6: PIC16F CSM/CVD EVALUATION BOARD COMPONENT LAYOUT (TOP SIDE)

TABLE 4-1: BOARD COMPONENTS

Reference Component

1 PIC16F1937 Microcontroller (U1) for PIC16F CSM Board 2 USB mini-B Receptacle (J5) 3 ICSP™ Programming Header (J1) 4 Power Supply (U2) to provide the V 5 Plug-in Sensor LEDs (D1-D16) 6 Plug-in Interface Connector (J4/J3) 7 PICkit serial analyzer connector

DD to the Evaluation Board

Evaluation Board Hardware

4.2.1.1 COMPONENT DESCRIPTIONS

The components listed here (in order of thei r referen ce t ags in Fig ure 4-6) are the key components of the application side of the PIC16F CSM Evaluation Board:

1. PIC16F1937 Microcontroller (U1): This provides the processing power for the

touch sense applications in the PIC16F Evaluation Board.

2. USB mini-B Receptacle (J5): This provides power to the board via USB.

3. ICSP™ Programming Header (J1): This provides a standard Microchip ICD

interface for programming and debugging app lications on an evaluation board. It is designed to connect directly with Microchip's PICkit 3. Pin 1 is located on the right side of the interface, as viewed from the front of the board, and is marked with an arrow

4. PICkit Serial Analyzer connector (J2): This connector is used to exchange

data to the Host PC through I

5. Power Supply (Q1): This converts the +5 V

VDC required by the evaluation board.

6. Plug-in Sensor LEDs (D1-D16): Sixteen LEDs (D1 through D16) are conn ected

to one general purpose I/O ports of the PIC microcontroller. These LEDs are lit based on the need of the application.

7. Plug-in Interface Connector (J4/J3): This is a 48-pin connector, which is used

to interface the different plug-in boards to the microcontroller. This connector is interfaced to 16 analog channels of the microcontroller and the remaining pins are connected to ground of the evaluation board.

C using the PICkit Serial Analyzer.

DC from VBUS to the regulated+3.3

4.2.2 PIC18F CTMU, PIC24F CTMU, and PIC32MX CVD Evaluation Boards

Figure 4-7 identifies the key hardware components that are common for the PIC18F CTMU, PIC24F CTMU, and PIC32MX CVD ev al ua ti on boards. There is one evaluation board and four plug-in daughter boards. T he four plug-in daughter boards are ide ntified as direct keys, matrix keys, 2-channel slider and 4-channel slider.

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

C13

R15

R16

R14

R10

R13

R12 R11

R6 R5 R4

RF1 RF3

RF4

C18

RF0

345

11 12

1b 1c

FIGURE 4-7: PIC18F, PIC24F, AND PIC32MX EVALUATION BOARD COMPONENT LAYOUT

(TOP SIDE)

TABLE 4-2: BOARD COMPONENTS

Reference Component

1a PIC24FJ128GB106 Microcontroller (U1) for PIC24F CTMU Board 1b PIC18F46J50 Microcontroller (U1) for PIC18F CTMU Board 1c PIC32MX795F512H Microcontroller (U1) for PIC32MX CVD Board

2 USB mini-B Receptacle (J5) 3 ICSP™ Programming Header (J1) 4 Power Supply (Q1) to provide the V 5 Plug-in Sensor LEDs (D1-D16) 6 Plug-in Interface Connector (J4/J3)

4.2.2.1 COMPONENT DESCRIPTIONS The components listed here (in order of the ir refer ence t ag s in Figur e 4-7) are the key

components of the application side of an ev aluation board, which are common for both PIC18F and PIC24F CTMU Evaluation Boards except for the microcontroller used in the board:

1a. PIC24FJ128GB106 Microcontroller (U1): This pro vides th e processing power

for the touch sense demonstration applications. The microcontroller featur es 64 Kbytes of Flash program memory and 16 Kbytes RAM, allowing sufficient space

DD to the Evaluation Board

for the development of more complex touch sense applications.

Evaluation Board Hardware

The demonstration application uses an 8 MHz signal to create the 48 MHz USB clock, as well as the application’s 32 MHz clock. Crystal, Y1, and associated components are used by the microcontroller’s internal oscillator to maintain the frequency tolerances required by the USB specifications.

1b. PIC18F46J50 Microcontroller (U1): This provide s the processing power for the

touch sense applications in the PIC18F Evaluation Board. The microcontroller features 64 Kbytes of Flash program memory and 3.8 Kbytes RAM. The demonstration application uses an 8 MHz signal to create the 48 MHz USB clock, as well as the application’s 32 MHz clock. Crystal, Y1, and associated components are used by the microcontroller’s internal oscillator to maintain the frequency tolerances required by the USB specifications.

1c. PIC32MX795F512H Microcontroller (U1): This provides the processing power

for the touch sense applications in the PIC32MX CVD Evaluation Board. The microcontroller features 512 Kbytes of Flash program memory and 128 Kbytes RAM. The demonstration application uses an 8 MHz signal to create the 48 MHz USB clock, as well as the application’s 40 MHz clock. Cryst al, Y1, and associated components are used by the microcontroller’s internal oscillator to maintain the frequency tolerances required by the USB specifications.

2. USB mini-B Receptacle (J5): This provides a convenient interface to the PC

side of the demonstration application. As the evaluation board functions as a bus-powered device, this connection also provides power to the board.

3. ICSP™ Programming Header (J1): This provides a standard Microchip ICD

interface for programming and debugging app lications on an evaluation board. It is designed to connect directly with Microchip’s PICkit™ Starter Kit. Pin 1 (N/C) is located on the right side of the interfac e, as viewed from the front of the board , and is marked with an arrow.

4. Power Supply (Q1): This converts the +5 V

+3.3 V

DC required by the evaluation board.

5. Plug-in Sensor LEDs (D1-D16): Sixteen LEDs (D1 through D16) are conn ected

to PORTD and PORTE of the PIC

microcontroller . These LEDs are lit based on

the need of the application.

6. Plug-in Interface Connector (J4/J3): This is a 48-pin connector, which is used

DC from VBUS to the regulated

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

4.2.3 PIC24H CVD Evaluation Board

Figure 4-8 identifies the key hardware components for the PIC24H CVD Evaluation Board. There is one evaluation board and four plug-in daughter boa rds. The four plug-in daughter boards are identified as di rect keys, matrix keys, 2-channel slider and 4-channel slider.

FIGURE 4-8: PIC24H CVD EVALUATION BOARD COMPONENT LAYOUT (TOP SIDE)

TABLE 4-3: BOARD COMPONENTS

Reference Component

1 PIC24HJ128GP506A Microcontroller (U1) for PIC24H CVD Board 2 USB mini-B Receptacle (J5) 3 ICSP™ Programming Header (J1) 4 Power Supply (Q1) to provide the V 5 Plug-in Sensor LEDs (D1-D16) 6 Plug-in Interface Connector (J4/J3) 7 PICkit serial analyzer connector

DD to the Evaluation Board

Evaluation Board Hardware

4.2.3.1 COMPONENT DESCRIPTIONS

The components listed here (in order of thei r referen ce t ags in Fig ure 4-8) are the key components of the application side of the PIC24H CVD Evaluation Board:

1. PIC24HJ128GP506A Microcontroller (U1): This provides the processing

power for the touch sense applications in the PIC24H Evaluation Board.

2. USB mini-B Receptacle (J5): This provides power to the board via USB.

3. ICSP™ Programming Header (J1): This provides a standard Microchip ICD

interface for programming and debugging app lications on an evaluation board. It is designed to connect directly with Microchip's PICkit 3, REAL ICE or ICD 3. Pin 1 is located on the right side of the interface, as viewed from the front of the board, and is marked with an arrow.

4. PICkit Serial Analyzer connector (J2): This connector is used to exchange

data to the Host PC through I

5. Power Supply (Q1): This converts the +5 V

VDC required by the evaluation board.

6. Plug-in Sensor LEDs (D1-D16): Sixteen LEDs (D1 through D16) are conn ected

to one general purpose I/O ports of the PIC microcontroller. These LEDs are lit based on the need of the application.

7. Plug-in Interface Connector (J4/J3): This is a 48-pin connector, which is used

C using the PICkit Serial Analyzer.

DC from VBUS to the regulated+3.3

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

Workstation

USB

Cable

MPLAB

ICD 3

REAL ICE™

ICSP™

Connector

Evaluation

J4/J3

Plug-in

Boards

Board

In-circuit Emulator

USB

Cable

SIP

Connector

PICkit Serial

Analyzer

A to mini-B USB Cable

(1)

Note 1: USB connection between an evaluation board and a workstation is used for power purposes

only can cannot be used for USB communication.

4.3 INTERFACING TO THE EVALUATION BOARDS

4.3.1 PIC16F CSM/CVD and PIC24H CVD Evaluation Boards with I2C Communication

To interface the plug-in boards to the evaluation boards in the mTouch Advanced Capacitive Evaluation Kits:

1. Connect the evaluation board to the MPLAB ICD progr ammer inter face throu gh

the ICSP connector, J1.

2. Connect the USB receptacle from the workstation to connector J5 of the

evaluation board. This is also used to power-up the evaluation board.

3. Connect the PICkit serial analyzer to the evaluation board through the J6

connector.

CAUTION

Do not use the PICKIT serial analyzer to power the PIC24H CVD Evaluation Board.

4. Connect any of the 4 plug-in boards to the evaluation board through the J4/J3

connector (48-pin).

5. After the hardware connections are don e, open the working project in the MPLAB

IDE and make the required changes for the corresponding plu g-i n boar d, which are explained in the Readme.txt files included in the project folder. However, the default values of the channel settings of the corresponding header files are mentioned in Section 2.2 “Individual Touch Sense Demonstrations”. The default settings of the configured chan nels ar e also explained in the Readme.txt file.

6. Download the Hex file onto the evaluation board using the MPLAB ICD 3, PICkit

3 or REAL ICE programming interface.

7. Check the working of the respective plug-in boards and view their output throug h

the 16 LEDs on the evaluation board.

FIGURE 4-9: EVALUATION BOARD BLOCK DIAGRAM (PIC16F AND PIC24H ONLY)

Evaluation Board Hardware

A to mini-B USB Cable

Workstation

USB

Cable

MPLAB

ICD 3

REAL ICE™

ICSP™

Connector

EVALUATION

J4/J3

Plug-in

Boards

BOARD

IN-CIRCUIT

EMULATOR

Note: The number of plug-in boards that can be interfaced with the evaluation

board simultaneously is limited by the number of channels in the evaluation board. Please refer to the specific evaluation board schematic in Appendix A. “Evaluation Board Schematics” to verify the number of channels available.

4.3.2 PIC18F CTMU, PIC24F CTMU, and PIC32MX CVD Evaluation Boards with USB Communications

To interface the plug-in boards to the evaluation boards in the mTouch Advanced Capacitive Evaluation Kits:

1. Connect the eva lu at ion board to the MPLA B

the ICSP connector, J1.

2. Connect the USB receptacle from the workstation to connector J5 of the

evaluation board. This is also used to power-up the evaluation board. For the CTMU boards, it is also used to interface to the PC.

3. Connect any of the 4 plug-in boards to the evaluation board through the J4/J3

connector (48-pin).

4. After the hardware connections are done, open the working project in the MPLAB

IDE and make the required changes for the correspond ing plu g-in boar d, which are explained in the Readme.txt file. However, the default values of the channel settings of the corresponding header files are mentioned in Section 2.2 “Individual Touch Sense Demonstrations”. The default settings of the configured channels are also explained in the Readme.txt file.

5. Download the Hex file onto the evaluation board using the MPLAB ICD 3

interface.

6. Check the working of the respective plug-in boards and view th eir output through

the 16 LEDs on the evaluation board.

ICD programmer interface through

FIGURE 4-10: EVALUATION BOARD BLOCK DIAGRAM (PIC18F, PIC24F and PIC32MX ONLY)

Note: The number of plug-in boards that can be interfaced with the evaluation

board simultaneously is limited by the number of channels in the e v al uat i on board. In the case of the PIC24F CTMU eval board, the ICD interface (PGD and PGC) shares two of the input channels of the connector , J4/J3 (channel 6 and channel 7), the operation might fail if any of the plug-in boards is connected to these 2 channels when the Debugger mod e is enabled in the MPLAB

IDE.

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

NOTES:

Chapter 5. Troubleshooting

This chapter discusses common operational issues and methods to resolve them.

5.1 COMMON ISSUES

1. The evaluation board does not respond to input s (i.e., no light s when a key

plug-in or touch sensor is touched)

Check the evaluation board for power:

• Verify that USB power (V

• If the evaluation board is connected to a computer through a USB hub, verify the hub is powered and capable of providing power to downstream devices.

• If the evaluation board is directly connected to a computer, verify that the USB port used is active; try switching to another port.

2. The touch sensors are abnormally sensitive or insensitive (generally insensitive) to inputs

Check to make sure that the plug-in daughter boards are connected to the channels that are mentioned in the Readme.txt file.

Check the bar graph settings for the sensors in the mTouch Sensing Solution software. The evaluation board’s trip point and other settings may have been changed to values that interfere with the default operation. To correct:

• In the Settings dialog, verify that the Use Firmware Settings option is

selected.

• If the Use Saved Value option is selected instead, change the trip point

values for each affected channel to a value that produces an appropriate response.

3. The evaluation board and the mTouch Sensing Solution Diagnostic Tool are installed and operating pro perly, but are not communicating with each other

The USB host controller may not have enumerated the ev alu ati on board correctly upon connection. To correct, try the following:

• If the evaluation board is connected through an external USB hub, try

connecting it directly to a USB port on the host computer.

• Disconnect the board, wait for 5 to 10 seconds, then reconnect the board. It is also possible that the USB host controller has dropped the communication

channel. This happens occasionally when the evaluation board is placed into Standby mode and then powered up using the power control. In this case, disconnect the evaluation board and reconnect after 5 to 10 seconds.

4. The board’s edge con nector will add some additional parasitic cap acitance to the system.

5. Touching the solder connections can create a very strong coupling to the sensor and trigger buttons.

mTouch™ ADVANCED CAPACITIVE

EVALUATION KITS USER’S GUIDE

USB, +5 VDC) is present on the USB connection.

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

NOTES:

mTouch™ ADVANCED CAPACITIVE

EVALUATION KITS USER’S GUIDE

Appendix A. Evaluation Board Schematics

This appendix provides the following schematics:

• Figure A-1: “mTouch™ – PIC16F CSM/CVD Evaluation Board Schematic”

• Figure A-2: “mTouch™ – PIC18F CTMU Ev aluation Board Schematic”

• Figure A-3: “mTouch™ – PIC24F CTMU Ev aluation Board Schematic”

• Figure A-4: “mTouch™ – PIC24H CVD Evaluation Board Schematic”

• Figure A-5: “mTouch™ – PIC32MX CVD Evaluation Board Schematic”

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

FIGURE A-1: mTouch™ – PIC16F CSM/CVD EVALUATION BOARD SCHEMATIC

Evaluation Board Schematics

R25

4.7K

VDD

PGD PGC RF5 RF4

2 4

8 10 12

RC0 RC1 RC6

RC7

1 3 5

7 9 11

R24

4.7K

VBUS

R23

56K

R26

100K

J3:A

1 2

J3:D

7 8

J3:G

13 14

J3:J

19 20

J3:L

BTN_8

23 24

J3:K

J3:I

RD4

J3:H

15 16

BTN_9

BTN_10

BTN_11

J4:F

BTN_4

11 12

J4:E

J4:C

5 6

J4:B

BTN_5

BTN_6

BTN_7

J4:L

BTN_0

J4:K

J4:I

J4:H

BTN_1

BTN_2

BTN_3

J4:A

J4:D

7 8

J4:G

13 14

J4:J

19 20

J3:F

J3:E

J3:C

J3:B

19 20

BTN_12

R19

RD0

VBUS

D-

D+

1 2 3 4 5

4.7uF

0.1

BUS

DD+

USB

Shield

+5V

VBUS

TP1

C13

0.1

MCP1702T–3302E/CB

IN OUT

GND

VDD

TP2

C18 1

C12

0.1

TP3

RD5

RD6

RD7

R20

RD1

D6 D7 D8

R21

RD2

D10 D11 D12

R22

RD3

D13

D14 D15 D16

Green

Yellow

Orange

Red

RC7RX/DT

RD4/SPP4

RD5/SPP5

RD6/SPP6

RD7SPP7

RB0

RB1

RB2

RB3

N/C

RC0

OSC2

OSC1

RE2

RE1

RE0

RA5

VDDCORE/VCAP

PIC18F4XJ50

N/C

RB414RB5

RB6

RB7

MCLR

1819202122

4443424140393837363534

RC6

RC5/D+

RC4/D-

RD3/SPP3

RD2/SPP2

RD1/SPP1

RD0/SPP0

USB

RC2

RC1

N/C

RA1

RA3

RA2

RA0

VDD

0.1

RC7 RD4

RD6

RD5

RD7

RC0

BTN_5 BTN_4

6.8uF

0.1

C10 22pf

C11

22pf

8 MHz

BTN_3

BTN_2

BTN_1

BTN_0

MCLR

PGD

PGC

RB4

RB5

1 2 3 4 5 6

MCLR

Program

R17

100

+5V

R18 10K

0.1

D17

Note: The Channels13,14 and 15 are not used, and are grounded in the PIC18F CTMU Evaluation Board.

BTN_7 BTN_6

BTN_12

BTN_9

BTN_10 BTN_8

D-

D+

RD3

RD2

RD0

RD1

VDD

0.1

RC6

BTN_11

RC1

MBR0520L

FIGURE A-2: mTouch™ – PIC18F CTMU EVALUATION BOARD SCHEMATIC

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

22 pF

10 MF

PIC24FJ128GB106I/PT

MCP1702T-3302E/CB

10 MF

FIGURE A-3: mTouch™ – PIC24F CTMU EVALUATION BOARD SCHEMATIC

Evaluation Board Schematics

RE4

RE2

RE1

RF1

RF0

RD7

RD5

RD4

RD2

RD1

PGC

BTN_9

BTN_10

BTN_13

BTN_14

RF4

RF5

Red

Yellow

RE6

RE5

RE3

RE1

RE0

RD7

RD6

RD4

RD3

RD2

RD0

SDA

VDD

MCLR

VDD

RF1

+5V

Orange

Green

RE7

RE4

RE2

RD5

RD1

MCLR

SCL

R18

10K

VDD

RE0

RE3

0.1

C12

VDD

RD6

VDD

TP3

RD3

RF4

RF0

C10

20pf

C11

20pf

10uF

0.1

C5 3

D+

VBUS2D-

Shield

+5V

0.1

VDD

0.1

PGD

BTN_8

BTN_12

BTN_11

BTN_15

VDD

9 10

3 4

11 12

1 257

PGD

PGC

BTN_4

BTN_3

BTN_2

BTN_0

BTN_14

BTN_13

BTN_11

BTN_10

BTN_8

USB

Program

R15

R10

R4 1K

R17 100

BTN_1

BTN_2

BTN_4

BTN_5

RE7

RE6

RD9

RD10

VDD

SCL

RD9

RD10

RD0

J4:G

J4:J

J4:B

J4:A

J4:F

J4:E BTN_5

J4:I

J4:H

BTN_1

J4:L

J3:B

J3:C

BTN_15

J3:F BTN_12

J3:G

J3:D

J3:H

J3:I

BTN_9

J3:L

PICkit Serial

R14 1K

R16

D16

D15

D14

R13

D13

R12

D12

R11

D11

R3 1K

0.1

C13 C18

10uF

TP1 TP2

VDD

BTN_0

BTN_3

RE5

0.1

C15 C9

10uF

RF5

RD11

SDA

8MHz

RD11

0.1

J4:D

J4:C

J4:K

J3:E

J3:J

J3:A

J3:K

D10

416

325

GND

OUT

MCP1702T-3302E/CB

0.1

416

325

PIC24H128GP506

FIGURE A-4: mTouch™ – PIC24H CVD EVALUATION BOARD SCHEMATIC

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

RE4

RE2

RE1

RF1

RF0

RD7

RD5

RD4

RD2

RD1

PGC

BTN_9

BTN_10

BTN_13

BTN_14

RF4

RF5

D-

Red

Yellow

USB

RE6

RE5

RE3

RE1

RE0

RD7

RD6

RD4

RD3

RD2

RD0

VDD

MCLR

RF3

RF1

10uF

0.1

D+

Orange

Green

RE7

RE4

RE2

RD5

RD1

MCLR

0.1

C13

+5V

R18

10K

VDD

C18

10uF

VDD

RE0

RE3

TP3

VDD

RD6

RD3

0.1

C15

RF4

RF0

RF3

VDD

C10

20pf

C11

20pf

+5V TP1

0.1

VDD

TP2

0.1

PGD

BTN_8

BTN_12

BTN_11

BTN_15

VDD

+5V

0.1

9 10

3 4

11 12

1 257

PGD

PGC

BTN_4

BTN_3

BTN_2

BTN_0

BTN_14

BTN_13

BTN_11

BTN_10

BTN_8

Program

R15

R10

VDD

R17

100

BTN_1

BTN_2

BTN_4

BTN_5

RE7

RE6

RD9

RD10

VDD

D+

RD9

RD10

RD0

J4:G

J4:J

J4:B

J4:A

J4:F

J4:E BTN_5

J4:I

J4:H

BTN_1

J4:L

J3:B

J3:C

BTN_15

J3:F BTN_12

J3:G

J3:D

J3:H

J3:I

BTN_9

J3:L

R14

R16

D16

D15

D14

R13

D13

R12

D12

R11

D11

0.1

C12

BTN_0

BTN_3

RE5

10uF

RF5

RD11

0.1

C14

D-

8MHz

RD11

0.1

J4:D

J4:C

J4:K

J3:E

J3:J

J3:A

J3:K

D+

VBUS2D-

Shield

D10

GND

OUT

MCP1702T-3302E/CB

0.1

416

325

PIC32MX795F512H

FIGURE A-5: mTouch™ – PIC32MX CVD EVALUATION BOARD SCHEMATIC

mTouch™ ADVANCED CAPACITIVE

Start – main.c

InitializeSystem()

CalculateButton?

CapSenseStateMachine()

Yes

ButtonDecode()

Start – isr()

Service I2C™ Interrupt for

mTouch™ GUI

Check for Timer1

overflow

Overflow

No Overflow

Use previous

measurement in

CurrentSample & Start

next sample in

RestartTimers()

Store measurement in CurrentSample & Start

next sample in RestartTimers()

Return

EVALUATION KITS USER’S GUIDE

Appendix B. mTouch™ PIC16F CSM State Diagrams

FIGURE B-1: mTouch™ – PIC16F CSM STATE DIAGRAMS

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

InitializeSystem()

Yes

Return

Yes

Is ReleaseAverage[ButtonIndex]

outside of

ReleaseAverageGuardBand?

InitializeSystem()

Is SupplyVoltage outside of

VoltageGuardBand?

Start –

CapSenseStateMachine()

Correct, Scale

and Cap

CurrentSample

Calculate

PercentReleased

State Machine Design

(next page)

FIGURE B-1: mTouch™ – PIC16F CSM STATE DIAGRAMS (CONTINUED)

FIGURE B-1: mTOUCH™ – PIC16F CSM STATE DIAGRAMS (CONTINUED)

Prime:

MeasureSamplePeriod

once for each Button

and store in

ReleasedAverage

SetSampleTime:

MeasureSamplePeriod

for each Button and

average in

ReleasedAverage

PrimeNewSample:

Store CurrentSample

once for each Button in

ReleasedAverage

CapSenseStateMachine()

1/2 StartUpDelay

is timing

StartUpDelay

complete

StartUp:

Average CurrentSample in ReleasedAverage

1/2 StartUpDelay

is timing

StartUpDelay

complete

Debounce counter < ReleaseCount

Debounce Counter > ReleaseCount

InitializeSystem()

Debounce Counter > PressCount

PressedTime

< ButtonTimeout

Debounce counter

< PressCount

PressedTime

> ButtonTimeout

ReleaseDebounce:

Start Debounce counter

Released:

Average CurrentSample

in ReleasedAverage

PressDebounce:

Start Debounce counter

Pressed:

Start ButtonTimout

counter

PercentReleased <

OffThreshold

PressedTime

> ButtonTimeout

PercentReleased >

OffThreshold

PercentReleased >

PressThreshold

PercentReleased <

PressThreshold

mTouch™ PIC16F CSM State Diagrams

mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

Start –

ButtonDecode()

ButtonState[Button0] >

Released

ButtonState[Button1] >

Released

ETC...

ButtonState[ButtonF] >

Released

Return

Turn LED1 Off

Turn LED1 On

Turn LED2 On

Turn LED16 On

Turn LED2 Off

Turn LED16 Off

Yes

FIGURE B-1: mTOUCH™ – PIC16F CSM STATE DIAGRAMS (CONTINUED)

mTouch™ ADVANCED CAPACITIVE

EVALUATION KITS USER’S GUIDE

Index

Numerics

2-Channel Slider Plug-in.................................... ...... 19

Block Diagrams

CSM Evaluation Layout (Top)........................... 32

PIC16F CSM Evaluation Board

Application Side.............................27

PIC18F CTMU Evaluation Board

Application Side.................................. 28

PIC24F CTMU Evaluation Board

Application Side.............................29

Board Components.......................................32, 34, 36

Board H/W ...............................................................27

Board Setup.............................................................16

Connecting the H/W..........................................16

Installing the S/W.............................................. 16

Interfacing the Plug-in Boards ..........................39

, 30

, 31

Charge Time Measurement Unit (CTMU)...........17, 29

Components

External Plug-in Components........................... 35

ICSP Programming Header.............................. 35

PIC18F46J50 Microcontroller........................... 35

PIC24FJ128GB106 Microcontroller.................. 34

PIC32MX795F512H Microcontroller.................35

Plug-in Interface Connector.............................. 35

Plug-in Sensor LEDs ........................................35

Power Supply....................................................35

USB mini-B Receptacle .................................... 35

Configuration Settings

Readme ............................................................ 19

CSM State Diagrams ...............................................49

Customer Notification Service..................................10

Customer Support.................................................... 11

Demonstration Application....................................... 17

Direct Key Plug-in.................................................... 18

Documentation

Conventions........................................................ 6

Layout.................................................................5

Evaluation Board

CTMU and CVD Component Layout (Top Side)34

Host Computer Requirements..................................15

Initial Board Setup.................................................... 16

Internet Address.................................................... ... 10

Kit Contents............................................... ... ............14

Matrix Key Plug-in....................................................19

Microchip Internet Web Site.....................................10

mTouch Sensing Solution

Diagnostic Tool................................................. 21

Introduction.......................................................21

Operational Requirements.......................................15

PIC16F1937 Microcontroller ..............................27, 30

PIC16F CSM Evaluation Board ........................17

PIC18F46J50 Microcontroller...................................28

PIC24FJ128GB106 Microcontroller ......................... 29

PIC32MX795F512H Microcontroller ........................34

Plug in Power...........................................................20

Plug in the Sensors..................................................20

Readme

Configuration Settings.......................................19

Recommended Reading ............................................7

Schematics

PIC16F CSM Evaluation Board ........................44

PIC18F CTMU Evaluation Board...................... 45

PIC24F CTMU Evaluation Board...................... 46

PIC24H CVD Evaluation Board ........................47

PIC32MX CVD Evaluation Board......................48

Touch Interface........................................................17

Sensor Persistence..................................... ... ... 18

Touch Sensitivity...............................................17

Touch Sense Demonstrations..................................18

12-Key Matrix Plug-in Board.............................19

2-Channel Slider Plug-in Board ........................ 19

4-Channel Slider Plug-in...................................19

8-Key Direct Plug-in Board ...............................18

Troubleshooting .......................................................41

Using the mTouch™ Sensing Solution

Diagnostic Tool................................................. 21

Warranty Registration ............................... ... ... ...........7

WWW Address.........................................................10

Worldwide Sales and Service

AMERICAS

Corporate Office

2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com

Atlanta

Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455

Boston

Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088

Chicago

Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075

Cleveland

Independence, OH Tel: 216-447-0464 Fax: 216-447-0643

Dallas

Addison, TX Tel: 972-818-7423 Fax: 972-818-2924

Detroit

Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260

Kokomo

Kokomo, IN Tel: 765-864-8360 Fax: 765-864-8387

Los Angeles

Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608

Santa Clara

Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445

Toronto

Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509

ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor Tower 6, The Gateway Harbour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431

Australia - Sydney

Tel: 61-2-9868-6733 Fax: 61-2-9868-6755

China - Beijing

Tel: 86-10-8528-2100 Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8665-5511 Fax: 86-28-8665-7889

China - Chongqing

Tel: 86-23-8980-9588 Fax: 86-23-8980-9500

China - Hong Kong SAR

Tel: 852-2401-1200 Fax: 852-2401-3431

China - Nanjing

Tel: 86-25-8473-2460 Fax: 86-25-8473-2470

China - Qingdao

Tel: 86-532-8502-7355 Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5533 Fax: 86-21-5407-5066

China - Shenyang

Tel: 86-24-2334-2829 Fax: 86-24-2334-2393

China - Shenzhen

Tel: 86-755-8203-2660 Fax: 86-755-8203-1760

China - Wuhan

Tel: 86-27-5980-5300 Fax: 86-27-5980-5118

China - Xian

Tel: 86-29-8833-7252 Fax: 86-29-8833-7256

China - Xiamen

Tel: 86-592-2388138 Fax: 86-592-2388130

China - Zhuhai

Tel: 86-756-3210040 Fax: 86-756-3210049

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-3090-4444 Fax: 91-80-3090-4123

India - New Delhi

Tel: 91-11-4160-8631 Fax: 91-11-4160-8632

India - Pune

Tel: 91-20-2566-1512 Fax: 91-20-2566-1513

Japan - Yokohama

Tel: 81-45-471- 6166 Fax: 81-45-471-6122

Korea - Daegu

Tel: 82-53-744-4301 Fax: 82-53-744-4302

Korea - Seoul

Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857 Fax: 60-3-6201-9859

Malaysia - Penang

Tel: 60-4-227-8870 Fax: 60-4-227-4068

Philippines - Manila

Tel: 63-2-634-9065 Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870 Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-6578-300 Fax: 886-3-6578-370

Taiwan - Kaohsiung

Tel: 886-7-536-4818 Fax: 886-7-536-4803

Taiwan - Taipei

Tel: 886-2-2500-6610 Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351 Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-39 Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828 Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0 Fax: 49-89-627-144-44

Italy - Milan

Tel: 39-0331-742611 Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399 Fax: 31-416-690340

Spain - Madrid

Tel: 34-91-708-08-90 Fax: 34-91-708-08-91

UK - Wokingham

Tel: 44-118-921-5869 Fax: 44-118-921-5820

01/05/10

Microchip Technology mTouch™ Advanced Capacitive Evaluation Kits User’s Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Chapter 1. Introduction to the Evaluation Boards

1.1 OVERVIEW

1.1.1 mTouch Advanced Capacitive Evaluation Kit Contents

1.1.2 PIC24H Capacitive Touch Evaluation Kit Contents

FIGURE 1-2: PIC24H CAPACITIVE TOUCH EVALUATION KIT CONTENTS

1.2 OPERATIONAL REQUIREMENTS

1.3 INITIAL BOARD SETUP

1.3.1 Installing the Software

1.3.2 Connecting the Hardware

Chapter 2. Demonstration Application

2.1 INTRODUCTION TO THE TOUCH INTERFACE

2.1.1 Touch Sensitivity

2.1.2 Sensor Persistence

2.2 INDIVIDUAL TOUCH SENSE DEMONSTRATIONS

2.2.1 8-Key Direct Plug-in Daughter Board

FIGURE 2-1: DEFAULT PLUG-IN CHANNELS FOR 8-KEY PLUG-IN BOARD

2.2.2 12-Key Matrix Plug-in Daughter Board

2.2.3 2-Channel and 4-Channel Slider Plug-in Daughter Board

FIGURE 2-3: PLUG IN THE SENSORS BEFORE POWERING BOARD

FIGURE 2-4: PLUG IN POWER AFTER SYSTEM IS CONFIGURED

Chapter 3. Using the mTouch™ Sensing Solution

3.1 ABOUT THE mTouch SENSING SOLUTION DIAGNOSTIC TOOL

3.2 MPLAB IDE INTEGRATED mTOUCH DIAGNOSTIC TOOL GUI

3.2.1 USING THE MPLAB IDE INTEGRATED mTOUCH DIAGNOSTIC TOOL GUI

Chapter 4. Evaluation Board Hardware

4.1 APPLICATION FUNCTIONAL OVERVIEW

4.1.1 PIC16F CSM/CVD Evaluation Board

FIGURE 4-1: PIC16F CSM/CVD EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

4.1.2 PIC18F CTMU Evaluation Board

FIGURE 4-2: PIC18F CTMU EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

4.1.3 PIC24F CTMU Evaluation Board

FIGURE 4-3: PIC24F CTMU EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

4.1.4 PIC24H CVD Evaluation Board

FIGURE 4-4: PIC24H CVD EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

4.1.5 PIC32MX CVD Evaluation Board

FIGURE 4-5: PIC32MX CVD EVALUATION BOARD APPLICATION-SIDE BLOCK DIAGRAM

4.2 BOARD COMPONENTS

4.2.1 PIC16F CSM/CVD Evaluation Board

FIGURE 4-6: PIC16F CSM/CVD EVALUATION BOARD COMPONENT LAYOUT (TOP SIDE)

TABLE 4-1: BOARD COMPONENTS

4.2.2 PIC18F CTMU, PIC24F CTMU, and PIC32MX CVD Evaluation Boards

TABLE 4-2: BOARD COMPONENTS

4.2.3 PIC24H CVD Evaluation Board

FIGURE 4-8: PIC24H CVD EVALUATION BOARD COMPONENT LAYOUT (TOP SIDE)

TABLE 4-3: BOARD COMPONENTS

4.3 INTERFACING TO THE EVALUATION BOARDS

4.3.1 PIC16F CSM/CVD and PIC24H CVD Evaluation Boards with I2C Communication

FIGURE 4-9: EVALUATION BOARD BLOCK DIAGRAM (PIC16F AND PIC24H ONLY)

4.3.2 PIC18F CTMU, PIC24F CTMU, and PIC32MX CVD Evaluation Boards with USB Communications

FIGURE 4-10: EVALUATION BOARD BLOCK DIAGRAM (PIC18F, PIC24F and PIC32MX ONLY)

Chapter 5. Troubleshooting

5.1 COMMON ISSUES

Appendix A. Evaluation Board Schematics

FIGURE A-1: mTouch™ – PIC16F CSM/CVD EVALUATION BOARD SCHEMATIC

FIGURE A-2: mTouch™ – PIC18F CTMU EVALUATION BOARD SCHEMATIC

FIGURE A-3: mTouch™ – PIC24F CTMU EVALUATION BOARD SCHEMATIC

FIGURE A-4: mTouch™ – PIC24H CVD EVALUATION BOARD SCHEMATIC

FIGURE A-5: mTouch™ – PIC32MX CVD EVALUATION BOARD SCHEMATIC

Appendix B. mTouch™ PIC16F CSM State Diagrams

FIGURE B-1: mTouch™ – PIC16F CSM STATE DIAGRAMS

FIGURE B-1: mTouch™ – PIC16F CSM STATE DIAGRAMS (CONTINUED)

FIGURE B-1: mTOUCH™ – PIC16F CSM STATE DIAGRAMS (CONTINUED)

FIGURE B-1: mTOUCH™ – PIC16F CSM STATE DIAGRAMS (CONTINUED)