A simplified description of how the MPLAB ICD 3 in-circuit debugger system works is provided here. It is intended to provide enough information so a target board can be designed that is compatible with the debugger for both emulation and programming operations. The basic theory of in-circuit emulation and programming is described so that problems, if encountered, are quickly resolved. • MPLAB ICD 3 In-Circuit Debugger vs. MPLAB ICE 2000/4000 In-Circuit Emulators • MPLAB ICD 3 In-Circuit Debugger vs. MPLAB ICD 2 Debugger • Debugger To Target Communication • Communication Connections • Debugging with the Debugger • Requirements For Debugging • Programming with the Debugger • Resources Used by the Debugger MPLAB ICD 3 In-Circuit Debugger User’s Guide 2010 Microchip Technology Inc. DS51766B 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 operati……