Microchip Technology DM164123 User Manuals

Table of Contents

• Chapter 1. PICDEM™ System Management

  11
  • 1.1 Introduction

    11
  • 1.2 Highlights

    11
  • 1.3 PICDEM™ System Management Kit Contents

    11
  • 1.4 PICDEM System Management Layout

    12
    • 1.4.1 Board Features

      12
    • 1.4.2 Board Connections

      12
      • Figure 1-1: PICDEM™ System Management Board

        12
      • Figure 1-2: PICkit™ Serial Analyzer Pinout

        13
    • 1.4.3 Heating Element

      14
    • 1.4.4 Board Options

      14
  • 1.5 Quick Start Guide

    14
    • 1.5.1 Demonstration Program

      14
    • 1.5.2 Real-Time Clock: Address 0xA2

      15
      • Figure 1-3: Real-Time Clock

        15
    • 1.5.3 Analog-to-Digital Converter (ADC): Address 0xA4

      15
      • Figure 1-4: Analog-to-Digital Converter (ADC)

        15
    • 1.5.4 Serial EEPROM: Address 0xA8

      16
      • Figure 1-5: Serial EEPROM

        16
    • 1.5.5 Thermal Management: Address 0xA6

      16
      • Figure 1-6: Thermal Management

        16
    • 1.5.6 General I2C

      17
      • Figure 1-7: I2C™

        17
• Chapter 2. Background

  19
  • 2.1 Introduction

    19
  • 2.2 Highlights

    19
  • 2.3 PICDEM™ System Management and PICkit™ Serial Analyzer

    19
  • 2.4 Fan Speed Control

    19
    • 2.4.1 Two-wire Fan

      19
    • 2.4.2 Three-wire Fan

      20
      • Figure 2-1: three-Wire

        20
    • 2.4.3 Measuring the Speed of a Two and Three-wire Fan

      20
      • Figure 2-2: Pulse Stretching

        20
    • 2.4.4 Four-wire Fan Control

      21
• Chapter 3. Troubleshooting

  23
  • 3.1 Introduction

    23
  • 3.2 Common Problems

    23
    • 3.2.1 Serial Communications does not appear to be working

      23
    • 3.2.2 Microcontroller does not run after programming using the MPLAB® ICD 2

      23
    • 3.2.3 The fan is not providing proper feedback

      23
    • 3.2.4 Heating element is not heating

      23
    • 3.2.5 Temperature is not changing

      23
• Appendix A. Hardware Schematics

  25
  • A.1 Introduction

    25
    • Figure A-2: Schematic Sheet 2

      26
• Appendix B. Register Maps

  27
  • B.1 Introduction

    27
• Worldwide Sales

  32