MCP3421 Battery Fuel Gauge Demo Board Users Guide 2007 Microchip Technology Inc. DS51683ANote 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 Microchips 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 Microchips 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 AmpLab, FilterLab, Linear Active Thermistor, Migratable applications and the like is provided only for your convenience Memory, MXDEV, MXLAB, SEEVAL, SmartSensor and The and may be superseded by updates. It is your responsibility to Embedded Control Solutions Company are registered trade- ensure that your application meets with your specifications. marks of Microchip Technology Incorporated in the U.S.A. MICROCHIP MAKES NO REPRESENTATIONS OR Analog-for-the-Digital Age, Application Maestro, CodeGuard, WARRANTIES OF ANY KIND WHETHER EXPRESS OR dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, IMPLIED, WRITTEN OR ORAL, STATUTORY OR ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Cir- OTHERWISE, RELATED TO THE INFORMATION, cuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, INCLUDING BUT NOT LIMITED TO ITS CONDITION, MPLAB Certified logo, MPLIB, MPLINK, PICkit, PICDEM, QUALITY, PERFORMANCE, MERCHANTABILITY OR PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, Power- FITNESS FOR PURPOSE. Microchip disclaims all liability Mate, PowerTool, REAL ICE, rfLAB, Select Mode, Smart arising from this information and its use. Use of Microchip Serial, SmartTel, Total Endurance, UNI/O, WiperLock and devices in life support and/or safety applications is entirely at ZENA are trademarks of Microchip Technology Incorporated the buyers risk, and the buyer agrees to defend, indemnify in the U.S.A. and other countries. and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No SQTP is a service mark of Microchip Technology Incorporated licenses are conveyed, implicitly or otherwise, under any in the U.S.A. Microchip intellectual property rights. All other trademarks mentioned herein are property of their respective companies. Trademarks 2007, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC, PICmi- Printed on recycled paper. cro, PICSTART, PRO MATE, rfPIC and SmartShunt are regis- tered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona Gresham, Oregon and design centers in California and India. The Companys quality system processes and procedures are for its PIC MCUs and dsPIC DSCs, KEELOQ code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchips quality system for the design and manufacture of development systems is ISO 9001:2000 certified. 2007 Microchip Technology Inc. DS51683A-page ii