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INTRODUCTION

This document contains information about MPLAB? ICD 2 headers, which provide in-circuit debugging capabilities for specific Microchip devices.

A special ICD/ICE device is connected to a header board to be used with MPLAB ICD 2. This device is mounted on the top of a header and its signals are routed to the MPLAB ICD 2 connector (Figure 1). On the bottom of the header is a socket that is used to connect to the target board.

Special ICD/ICE versions of selected devices are needed to provide one or more of the following:

? the built-in debug circuitry that a device may lack

? additional pins for the clock, data and MCLR functions required for ICD

? dedicated program/data memory for ICD

ICD versions are labeled with an ICD suffix (Device-ICD). For some devices, ICE versions are available (Device-ICE) and may be used with MPLAB ICD 2 as ICD devices.