MCP3914 ADC Evaluation Board for 16-Bit MCUs User’s Guide  2013 Microchip Technology Inc. DS50002176A 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. • 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. Information contained in this publication regarding device Trademarks applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, dsPIC, and may be superseded by updates. It is your responsibility to FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, ensure that your application meets with your specifications. PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash MICROCHIP MAKES NO REPRESENTATIONS OR and UNI/O are registered trademarks of Microchip Technology WARRANTIES OF ANY KIND WHETHER EXPRESS OR Incorporated in the U.S.A. and other countries. IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, INCLUDING BUT NOT LIMITED TO ITS CONDITION, MTP, SEEVAL and The Embedded Control Solutions QUALITY, PERFORMANCE, MERCHANTABILITY OR Company are registered trademarks of Microchip Technology FITNESS FOR PURPOSE. Microchip disclaims all liability Incorporated in the U.S.A. arising from this information and its use. Use of Microchip Silicon Storage Technology is a registered trademark of devices in life support and/or safety applications is entirely at Microchip Technology Inc. in other countries. the buyer’s risk, and the buyer agrees to defend, indemnify and Analog-for-the-Digital Age, Application Maestro, BodyCom, hold harmless Microchip from any and all damages, claims, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, suits, or expenses resulting from such use. No licenses are dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, conveyed, implicitly or otherwise, under any Microchip ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial intellectual property rights. Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O, Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA and Z-Scale 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. GestIC and ULPP are registered trademarks 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. © 2013, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. ISBN: 978-1-62077-344-4 QUALITY MANAGEMENT SYSTEM Microchip received ISO/TS-16949:2009 certification for its worldwide CERTIFIED BY DNV headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures == ISO/TS 16949 == are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. DS50002176A-page 2  2013 Microchip Technology Inc. Object of Declaration: MCP3914 ADC Evaluation Board for 16-Bit MCUs User’s Guide  2013 Microchip Technology Inc. DS50002176A-page 3 MCP3914 ADC Evaluation Board for 16-Bit MCUs User’s Guide NOTES: DS50002176A-page 4  2013 Microchip Technology Inc. MCP3914 ADC EVALUATION BOARD FOR 16-BIT MCUs USER’S GUIDE Table of Contents Preface ...........................................................................................................................7 Introduction............................................................................................................7 Document Layout..................................................................................................7 Conventions Used in this Guide............................................................................8 Recommended Reading........................................................................................9 The Microchip Web Site........................................................................................9 Customer Support.................................................................................................9 Document Revision History...................................................................................9 Chapter 1. Product Overview 1.1 Overview ......................................................................................................11 1.2 What the MCP3914 ADC Evaluation Board for 16-Bit MCUs Contains .......12 Chapter 2. Hardware Description 2.1 PIM Module/MCP3914 Connection and Peripheral Usage Overview ..........13 2.2 Analog Input Structure ..................................................................................14 2.3 Universal Serial Bus (USB) ..........................................................................15 Chapter 3. Firmware 3.1 PIC24FJ256GA110 Firmware Description ...................................................17 3.2 Data Acquisition ...........................................................................................17 3.3 UART Communication Protocol ...................................................................18 Appendix A. Schematics and Layouts A.1 Introduction ..................................................................................................19 A.2 Schematic – Power ......................................................................................20 A.3 Schematic – ADC .........................................................................................21 A.4 Schematic – Microcontroller (MCU) ............................................................22 A.5 Schematic – PIM Module .............................................................................23 A.6 Schematic – LCD and UART .......................................................................24 A.7 Board – Top Trace and Top Silk ..................................................................25 A.8 Board – Bottom Trace and Bottom Silk ........................................................25 A.9 Board – Layer #2 GND ................................................................................26 A.10 Board – Layer #3 VDD ...............................................................................26 A.11 Board – Top Silk and Pads ........................................................................27 A.12 Board – Bottom Silk and Pads ...................................................................27 Appendix B. Bill of Materials (BOM) Worldwide Sales and Service ....................................................................................32  2013 Microchip Technology Inc. DS50002176A-page 5 MCP3914 ADC Evaluation Board for 16-Bit MCUs User’s Guide NOTES: DS50002176A-page 6  2013 Microchip Technology Inc. MCP3914 ADC EVALUATION BOARD FOR 16-BIT MCUs 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® IDE online help. 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 using the MCP3914 ADC Evaluation Board for 16-Bit MCUs. Items discussed in this chapter include: • Document Layout • Conventions Used in this Guide • Recommended Reading • The Microchip Web Site • Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP3914 ADC Evaluation Board for 16-Bit MCUs as a development tool to emulate and debug firmware on a target board. The manual layout is as follows: • Chapter 1.“Product Overview” – Provides important information about the MCP3914 ADC Evaluation Board for 16-Bit MCUs hardware. • Chapter 2.“Hardware Description” – Provides information about the evaluation board software. • Chapter 3.“Firmware” – Describes the MCP3914 ADC Evaluation Board for 16-Bit MCUs firmware. • Appendix A.“Schematics and Layouts”– Shows the schematic and board layouts for the MCP3914 ADC Evaluation Board for 16-Bit MCUs. • Appendix B.“Bill of Materials (BOM)” – Lists the parts used to build the MCP3914 ADC Evaluation Board for 16-Bit MCUs.  2013 Microchip Technology Inc. DS50002176A-page 7 MCP3914 ADC Evaluation Board for 16-Bit MCUs User’s Guide 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 “Save project before build” dialog Underlined, italic text with A menu path File>Save right angle bracket Bold characters A dialog button Click OK A tab Click the Power tab N‘Rnnnn A number in verilog format, 4‘b0010, 2‘hF1 where N is the total number of digits, R is the radix and n is a digit. Text in angle brackets < > A key on the keyboard Press <Enter>, <F1> Courier New font: Plain Courier New Sample source code #define START Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’ Italic Courier New A variable argument file.o, where file can be any valid filename Square brackets [ ] Optional arguments mcc18 [options] file [options] Curly brackets and pipe Choice of mutually exclusive errorlevel {0|1} character: { | } arguments; an OR selection Ellipses... Replaces repeated text var_name [, var_name...] Represents code supplied by void main (void) user { ... } DS50002176A-page 8  2013 Microchip Technology Inc. Preface RECOMMENDED READING This user’s guide describes how to use MCP3914 ADC Evaluation Board for 16-Bit MCUs. Another useful document is listed below. The following Microchip document is available and recommended as a supplemental reference resource: • MCP3914 Data Sheet – “3V Eight-Channel Analog Front End” (DS20005216) THE MICROCHIP WEB SITE Microchip provides online support via our web site at 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 (FAQs), 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 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://support.microchip.com. DOCUMENT REVISION HISTORY Revision A (October 2013) • Initial release of this document.  2013 Microchip Technology Inc. DS50002176A-page 9 MCP3914 ADC Evaluation Board for 16-Bit MCUs User’s Guide NOTES: DS50002176A-page 10  2013 Microchip Technology Inc.