Microchip Technology PICDEM System Management User guide

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PICDEM™ System Management

USER’S GUIDE

PICDEM SYSTEM MANAGEMENT

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 Digit al Millennium Copyright Act. If suc h a c t s 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 applications and t he lik e is provided only for your convenience and may be su perseded by upda t es . It is y our responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life supp ort and/or safety ap plications is entir ely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless M icrochip from any and all dama ges, claims, suits, or expenses re sulting from such use. No licens es are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K

EELOQ, KEELOQ logo, microID, MPLAB, PIC,

PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

AmpLab, FilterLab, Linear Active Thermistor, Migratable Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzy LAB, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip T echnology Incorporated in the U.S.A.

All other trademarks mentioned herein are property of their respective companies.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona, Gresham, Oregon and Mountain View, California. The Company’s quality system processes and procedures are for its PIC MCUs and dsPIC® DSCs, KEELOQ 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.

code hopping devices, Serial

PICDEM™ SYSTEM MANAGEMENT

USER’S GUIDE

Table of Contents

Preface ...........................................................................................................................1

Chapter 1. PICDEM™ System Management

1.1 Introduction .....................................................................................................7

1.2 Highlight s ......... ............. .. .. ........................... .. .. ........................... .. .. ................ 7

1.3 PICDEM™ System Management Kit Contents .................................. .. .. .. ......7

1.4 PICDEM System Management Layout ........................................................... 8

1.4.1 Board Features ............................................................................................8

1.4.2 Board Connections ...................................................................................... 8

1.4.3 Heating Element ........................................................................................10

1.4.4 Board Options ...........................................................................................10

1.5 Quick Star t G u id e ....... .................................................................. .. .. ............ 10

1.5.1 Demonstration Program ............................................................................ 10

1.5.2 Real-Time Clock: Address 0xA2 ................................................................11

1.5.3 Analog-to-Digital Converter (ADC): Address 0xA4 .................................... 11

1.5.4 Serial EEPROM: Address 0xA8 ................................................................12

1.5.5 Thermal Management: Address 0xA6 .......................................................12

1.5.6 General I

C™ ................................. ...........................................................13

Chapter 2. Background

2.1 Introduction ...................................................................................................15

2.2 Highlight s ......... ............. .. .. ........................... .. .. ........................... .. .. .............. 15

2.3 PICDEM™ System Management and PICkit™ Serial Analyzer ..................15

2.4 Fan Speed Control .......................................................................................15

2.4.1 Two-wire Fan .............................................................................................15

2.4.2 Three-wire Fan .......................................................................................... 16

2.4.3 Measuring the Speed of a Two and Three-wire Fan .................................16

2.4.4 Four-wire Fan Control ...............................................................................17

Chapter 3. Troubleshooting

3.1 Introduction ...................................................................................................19

3.2 Common Pr o b le m s ......... .................................................................. ... .. ....... 19

3.2.1 Serial Communications does not appear to be working ............................19

3.2.2 Microcontroller does not run after programming using the MPLAB

3.2.3 The fan is not providing proper feedback ..................................................19

3.2.4 Heating element is not heating ..................................................................19

3.2.5 Temperature is not changing ..................................................................... 19

ICD 2 ...................................................................................... 19

PICDEM™ System Management User’s Guide

Appendix A. Hardware Schematics

A.1 Introduction ..................................................................................................21

Appendix B. Register Maps

B.1 Introduction ..................................................................................................23

Worldwide Sales and Service .....................................................................................28

PICDEM™ SYSTEM MANAGEMENT

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 Select the Help menu, and then Topics to open a list of available on-line help files.

IDE on-line help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the PICDEM

• Document Layout

• Conventions Used in this Guide

• Warranty Registration

• Recommended Reading

• The Microchip Web Site

• Development Systems Customer Change Notification Service

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the PICDEM™ System Management Board as a demonstration and training platform tool. The manual layout is as follows:

• Chapter 1. “PICDEM™ System Management” – This chapter provides an overview of the PICDEM System Management Board and system integration.

• Chapter 2. “Background” – This chapter provides background information on the System Management application and the PICDEM System Management Board.

• Chapter 3. “Troubleshooting” – This chapter provides resolutions for solving common problems associated with using the PICDEM System Management Board.

• Appendix A. “Hardware Schematics” – Illustrates the PICDEM System Management Board hardware schematic diagram.

™

System Management Board. Items discussed in this chapter include:

PICDEM™ System Management User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following docum entat io n conven tion s:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books “MPLAB

Emphasized text ...is the only comp ile r...

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

dialog

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sam ple source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces r epeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the tota l number of digits, R is th e radi x and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

Choice of mutually exclusive arguments; an OR selection

Represents code supplied by user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options] errorlevel {0|1}

var_name...] void main (void)

{ ... }

IDE User’s Guide”

WARRANTY REGISTRATION

Please complete the enclosed Warranty Registration Card and mail it promptly. Sending in the Warranty Registration Card entitles users to receive new product updates. Interim software releases are available at the Microchip web site.

Chapter 1. PICDEM™ System Management

1.1 INTRODUCTION

The PICDEM™ System Management Board is a demonstration and development tool designed for system management applications. System management applications monitor platform physical health characteristics such as temperatures, voltage, fan speed and chassis intrusion. These applications typically utilize independent I devices like real-time clocks, EEPROMs, Analog-to-Digital Converters (ADC), and thermal management controllers to monitor and control physical health characteristics.

The PICDEM™ System Management Board demonstrates how PIC can add value to these applications in terms of flexibility and cost. I implemented using the Synchronous Serial Port module in conjunction with the many other available peripherals. The programmability of a microcontroller I flexibility in the additional intelligent features that can be implemented as well as the easy adaptability of software when requirements change. A new address masking feature of the Syncronous Serial Port module allows the microcontroller to respond to multiple I to implement four I ment controller on one single microcontroller. Integrating these functions on a single microcontroller provides savings in the bill of materials cost and board space. For additional information on system monitoring, see Chapter 2. “Background” of this User's Guide.

PICDEM™ SYSTEM MANAGEMENT

USER’S GUIDE

C™

microcontrollers

C devices can be

C device allows

C device addresses. The PICDEM™ System Management uses this feature

C devices: a real-time clock, ADC, EEPROM, and thermal manage-

1.2 HIGHLIGHTS

This chapter discusses the features of the PICDEM™ System Management Board Kit. Topics discussed include:

• PICDEM™ System Management Kit Contents

• PICDEM™ System Management Layout

• Quick Start Guide

• Demonstration Program

1.3 PICDEM™ SYSTEM MANAGEMENT KIT CONTENTS

The PICDEM™ System Management kit includes the following items:

1. The PICDEM™ System Management printed circuit board with 3-wire fan

2. The PICkit™ Serial Analyzer

3. PICDEM™ System Management CD-ROM, which includes: a) PICDEM™ System Management User’s Guide b) PICDEM™ System Management GUI c) PICDEM™ System Management Board schematic d) PICDEM™ System Management Source Code e) PICDEM™ System Management Workshop slides

4. PICkit™ Serial Analyzer CD-ROM

5. +12V power supply

If you are missing any part of the kit, please contact your nearest Microchip sales office listed in the back of this publication for help.

PICDEM™ System Management User’s Guide

1.4 PICDEM SYSTEM MANAGEMENT LAYOUT

1.4.1 Board Features

The PICDEM™ System Management board is populated with a PIC16F886 microcontroller. The PIC16F886 connects to the following board features:

•MCLR

•4 LEDs

•I

• USART communications (TX and RX)

• ICSP™ programming pins (ICSPDAT and ICSPCLK)

• PWM output fan control

• Fan tachometer input line

• Heating element control line

• Temperature se nsor input line from MCP9700

• 32.768 kHz crystal clock (T1OSO and T1OSI)

• Battery voltage measurement enable, input line and interrupt-on-change pin

1.4.2 Board Connections

The PICDEM™ System Management is populated with connectors for programming, communications, and fan control and a temperature sensor, shown in Figure 1-1. A description of the connectors and the temperature sensor is described below.

switch, interrupt switch

C™ communications (SDA and SCL)

Temperature Sensor

FIGURE 1-1: PICDEM™ SYSTEM MANAGEMENT BOARD

Three-Wire Fan Connector

Two-Wire Fan Connector

Four-Wire Fan Connector

PICkitTM 2 ICSPTM Connector

PICkitTM Serial

Analyzer Connector

PICDEM™ System Management

• PICkit™ 2 ICSP™ (In-Circuit Serial Programmer™) Connector – A 6-pin ICSP

connector is provided for programming the PIC16F886. The PIC16F886 can be programmed through this connector with the PICkit 2 programmer, or the MPLAB ICD 2 using the RJ-11 to ICSP adapter (AC164110).

• PICkit™ Serial Analyzer Connector – The PICkit™ Serial Analyzer connector

provides pins for serial communication. The serial communications lines are designed to be used with the PICkit Serial Analyzer, but can also be used for other communicat ion s ap pli cat ions . Th e ser ia l co mmun ica tio n pi nou t li nes are s how n in Figure 1-2.

FIGURE 1-2: PICkit™ SERIAL ANALYZER PINOUT

123456

TX +5V G

ND SDA SCL RX

• Two-Wire Fan Connector – The two-wire fan connector (P204) provides power

and ground terminals for a two-wire fan. In order to make speed measurements, jumper JP200 must be set in the “SENSE” position for two-wire fans.

• Three-Wire Fan Connector – The three-wire fan (P203) connector provides

power and ground with a tachometer line for speed measurements. Jumper JP201 must be set in the “TACH” position to measure speed on three-wire fans. Additional background on driving two-wire and three-wire fans is provided in Section Chapter 2. “Background” of this document.

• Four-Wire Fan Connector – A four-wire fan connector (P205) is mounted on the

board and provides power, ground, tachometer and pulse-width modulation terminals. In order to measure the speed of the four-wire fan, the JP201 jumper must be set to the “TACH” position. Additional background information on driving four-wire fans is provided in Section Chapter 2. “Background” of this document.

• Temperature Sensor – An MCP9700 temperature sensor is located near the

heating element of the PICDEM System Management Board. The MCP9700 is an analog temperature sensor that converts temperature into an analog voltage. In order to measure temperature, the JP202 jumper must be set to the “MCP9700” position.

Temperature can also be simulated with the potentiometer that is populated on the board. The circuit has been designed so that the temperature range of the MCP9700 can be simulated. In order to simulate temperature with the potentiometer, the JP202 jumper must be set to the “POT” position.

PICDEM™ System Management User’s Guide

1.4.3 Heating Element

A resistor is used as a heating element to generate heat near the MCP9700 temperature sensor to simulate a thermal system. To activate the heating element, set the CTRL line (RA3) high. Once, the heating element is active, the ON LED will light up. In order to operate the heating element, JP200, heater enable jumper, must be in place.

WARNING

The heating element will be very hot when on. Do not activate the heating element unless the fan is running. Always disconnect JP200 after use and allow the heating element to cool.

1.4.4 Board Options

The PICDEM™ System Management Board is scribed and can be separated into two separate boards.

The fan control board contains the connectors for two, three and four-wire fans in addition to the control, power and ground lines for the heating element and temperature sensor, as well as the fan drive circuitry.

The main board contains the PIC16F866, power input, push-buttons, LEDs, battery backup circuit and connectors that break out the fan control, temperature sensor and heating element pins. These elements can be used in conjunction with the prototyping area for development.

1.5 QUICK START GUIDE

The PICDEM™ System Management Board is preloaded with demonstration firmware. The board must be configured as described in this section in order to use the demonstration program. For details on firmware, please review the System Management presentation included on the CD-ROM.

Board Setup

1. Connect the 3-wire fan to the 3-wire fan connector labeled “3-wire”.

2. Place the JP201 jumper on the bottom setting, connecting “TACH” to the middle pin.

3. Connect the J200 jumper to allow the heating element to be turned on.

4. Plug the PICkit Serial Analyzer into the PICDEM System Management Board on the pins marked “PICkit Serial” (P104).

5. Plug the PICkit Serial Analyzer USB cable into a compatible PC.

Board Power-Up

Connect the provided +12V power supply to J100.

1.5.1 Demonstration Program

1. Insert the included PICDEM System Management CD into the CD drive.

2. Run the installation software for the PICDEM System Management GUI (D:\Setup\Setup.exe).

3. Run the System Management program (start <Programs<Microchip System Management Board).

Within this screen there are several tabs that allow control and monitoring of various functions.

PICDEM™ System Management

1.5.2 Real-Time Clock: Address 0xA2

The Real-Time Clock function reads and writes actual time data on the PIC16F886. The time base is generated using a 32.768 kHz external Timer1 crystal. This time is automatically refreshed and can be changed in the GUI software.

FIGURE 1-3: REAL-TIME CLOCK

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

The ADC function provides Analog-to-Digital conversion of the voltage drop through potentiometer RP200. As you turn the potentiometer, the voltage indicator should change. Jumper JP202 must connect to the middle pin and the pin labeled “POT.”

FIGURE 1-4: ANALOG-TO-DIGITAL CONVERTER (ADC)

PICDEM™ System Management User’s Guide

1.5.4 Serial EEPROM: Address 0xA8

The serial EEPROM function allows EEPROM memory to be read and written. The data shown is the actual data that is written on the PIC MCU data EEPROM.

FIGURE 1-5: SERIAL EEPROM

1.5.5 Thermal Management: Address 0xA6

The T emper ature Management fun cti on pr ov ides contr ol over fan c ont ro ller sett ing s. The fan speed output is based on upper and lower temperature set points and ambient temperature. See how adjusting these temperature set points and ambient temperature affect fan speed. In order to measure ambient temperature, JP202 must connect the middle pin to the pin labeled “MCP9700.” The JP202 jumper can also be moved to connect the POT pin to the middle pin. This can allow the sweeping of temperatures in the full range of temperature values.

FIGURE 1-6: THERMAL MANAGEMENT

1.5.6 General I2C

PICDEM™ System Management

The I2C function is an interface that allows master control of an I2C bus. Locate the Read section of the I Address [W]” field with the address of the device to be read. The “Word Address” field should be filled with the word address of the device to be read. Finally, the “Byte Count” field should be filled with the number of bytes to be read. The results of the command will be output on the screen to the left.

Locate the write section of the I “Slave Address [W]” field with the address of the device to be written. The word address of the first byte to be written should be entered into the “Word Address” field. A single byte or multiple bytes of data can be filled in the data fields. The results will be shown on the screen to the left. See Appendix T able B-1 through T able B-4 for device address and word address details.

FIGURE 1-7: I

C Tab. A Read command can be executed by filling the “Slave

C Tab. A Write command is executed by filling the

C™

PICDEM™ System Management User’s Guide

NOTES:

PICDEM™ SYSTEM MANAGEMENT

USER’S GUIDE

Chapter 2. Background

2.1 INTRODUCTION

This chapter provides background information on the System Management application and the PICDEM System Management Board. It also provides background information on the fan drive circuitry that is available on the board. Additional detailed information can be found in the PICDEM System Management presentation and source code included on the CD-ROM.

2.2 HIGHLIGHTS

Topics covered in this chapter include:

• PICDEM™ System Management Board and PICkit™ Serial Analyzer

• Fan Speed Control

2.3 PICDEM™ SYSTEM MANAGEMENT AND PICKIT™ SERIAL ANALYZER

The PICDEM™ System Management emulates four I2C peripherals usually found on a system management bus. The real-time clock, ADC, serial EEPROM and thermal management controller peripherals, typically reside on the I servers and motherboards. The PIC16F886 integrates the functions of each device on

the I

C communications bus, while responding to the specific address calls for each

device. The PICkit Serial Analyzer is a utility that allows control and monitoring of the I

It is able to generate the specific device calls and interpret data. This data can then be translated to a personal computer and can be interacted with through a graphical user interface. In the PICDEM™ System Management Board, the PICkit Serial Analyzer takes the place of the bus master that manages the devices on the I

C bus line of rack-mount

C bus.

2.4 FAN SPEED CONTROL

2.4.1 Two-wire Fan

Two-wire fans provide power and ground terminals. The fan can be controlled through low-speed (10-100 Hz) PWM.

Note: Be sure to verify with the fan manufacturer that the fan specifications allow

for PWM control of input voltage.

As the duty cycle of the PWM signal increases, fan speed increases non-linearly. Fan speed feedback can be determined by measuring the time between commutation pulse noise that is generated on each revolution of the fan. Low-speed PWM can be generated by PIC microcontrollers using the Enhanced Capture/Compare/PWM module. Speed can be measured with comparator and timer peripherals.

PICDEM™ System Management User’s Guide

2.4.2 Three-wire Fan

FIGURE 2-1: THREE-WIRE

Three-wire fans provide a power, ground and tachometer terminals. The tachometer signal is typically generated by an internal Hall sensor that monitors magnetic field switching due to rotation in the permanent magnet of the fan. These fans can also be controlled through low-speed (10-100 Hz) PWM control of power input.

Note: Be sure to verify with the fan manufacturer that the fan specifications allow

for PWM control of input voltage.

As the duty cycle of the PWM signal increases, the fan speed will also increase non-linearly. Speed feedback is measured in the same way as the two-wire fan, but the tachometer output of the fan on the third wire provides a square wave through an open drain output.

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

It is important to note that when measuring speed on two and three-wire fans, some additional conditions must be taken into account. The tachometer measurements are only valid when fan power is on. Commutation noise is only measurable when power is on and the Hall sensor output in three-wire fan is only valid when power is on. When the PWM signal switches low, the Hall sensor output is no longer valid. Therefore, a technique called pulse stretching must be employed to ensure accurate measurements. Whenever a measurement is made, power must be provided to the fan for the duration of the measurement. (See figure below for more details.)

FIGURE 2-2: PULSE STRETCHING

Background

2.4.4 Four-wire Fan Control

Four-wire fan control provides a PWM input, tachometer output, fan power and ground. Instead of switching fan power, which must be done with two and three-wire fans, only the PWM input line is switched (typically at 10 kHz–30 kHz). As duty cycle of the fan increases, speed also increases non-linearly. The tachometer line is the same as the three-wire fan, generating pulses based on the rotation of the permanent magnet of the fan; however, the Hall sensor is always on. Therefore, PWM stretching is not needed to ensure an accurate measurement.

PICDEM™ System Management User’s Guide

NOTES:

Chapter 3. Troubleshooting

3.1 INTRODUCTION

This chapter describes common problems and resolutions associated with using the PICDEM System Management Board.

3.2 COMMON PROBLEMS

3.2.1 Serial Communications does not appear to be working

Reset the PICDEM System Management Board by pressing the SW100 switch labeled “MCLR

The PICkit Serial Analyzer must be connected to header P104 labeled “PICkit Serial.” Ensure that the board is being powered by a 12 V

.”

PICDEM SYSTEM MANAGEMENT

USER’S GUIDE

DC power supply.

3.2.2 Microcontroller does not run after programming using the

MPLAB

When using the MPLAB ICD 2 as a programmer, the microcontroller will not run unless you disconnect the MPLAB ICD 2 or release the MPLAB ICD 2 from Reset.

3.2.3 The fan is not providing proper feedback

The 3-wire fan provides a tachometer output on the SENSE line. Ensure that the JP201 jumper connects to the center and “TACH” pins.

3.2.4 Heating element is not heating

Check to see that the heater is enabled. The heater should be on if the CTRL line is high. If you are using the System Management GUI, ensure in the Temperature Management Tab that the checkbox “Heater On” is checked.

Check to ensure that the “Heater Enable” jumper JP200 is in place.

3.2.5 Temperature is not changing

Check JP202 and ensure that it is connected to center pin and pin labeled MCP9700.

ICD 2

PICDEM System Management® User’s Guide

NOTES:

PICDEM™ SYSTEM MANAGEMENT

Appendix A. Hardware Schematics

A.1 INTRODUCTION

This appendix contains the PICDEM™ System Management Board hardware diagrams.

FIGURE A-1: SCHEMATIC SHEET 1

USER’S GUIDE

PICDEM™ System Management User’s Guide

FIGURE A-2: SCHEMATIC SHEET 2

B.1 INTRODUCTION

This appendix contains the register maps for all of the emulated I2C devices.

TABLE B-1: REAL-TIME CLOCK CALENDAR: 0XA2

REG NAME DESCRIPTION

0x00 CONFIG 1 7: 0

0x01 CONFIG 2 7: 0

0x02 SECONDS 00-59 seconds, coding: BCD 0x03 MINUTES 00-59 minutes, coding: BCD 0x04 HOURS 00-23 hours, coding: BCD 0x05 WEEKDAYS 00-06 weekday 0x06 DAYS 01-31 day of the month 0x07 MONTHS 01-12 month of the year, coding: BCD 0x08 YEARS 00-99 year, coding: BCD 0x09 ALARM MIN 00-59 minute of alarm, coding: BCD

0x0A ALARM HOUR 00-23 hour of alarm, coding: BCD

0x0B ALARM DAY 01-31 day of alarm, coding BCD

0x0C ALARM WEEK 00-06 weekday of alarm

0x0D (n ot ass ig ned ) 0x0E (not assigned ) 0x0F (not assigned)

PICDEM™ SYSTEM MANAGEMENT

USER’S GUIDE

Appendix B. Register Maps

6: 0 5: STOP – stop time function 0: RUN, 1: STOP) 4: 0 3: 0 2: 0 1: 0 0: 0

6: 0 5: 0 4: 0 3: AF – Alarm flag 2: 0 1: AE – Alarm enable 0: 0

bit 7: enable

PICDEM™ System Management User’s Guide

TABLE B-2: ANALOG-TO-DIGITAL CONVERTER: 0XA4

REG NAME DESCRIPTION

0x00 ADC High Byte B '0 0 0 0 9 8 7 6'

Voltage (V) = [(ADC High Byte:ADC Low Byte/4) * 2.5 / 1023]

0x01 ADC Low Byte B '5 4 3 2 1 0 x x

Voltage (V) = [(ADC High Byte:ADC Low Byte/4) * 2.5 / 1023]

TABLE B-3: THERMAL CONTROLLER: 0XA6

REG NAME DESCRIPTION

0x00 Temperature High Byte Ambient Temperature (degC) = [(Temperature High

Byte:Temperature Low Byte)/1023 * 2.5 - .50] / .010 0x01 Temperature Low Byte 0x02 Duty Cycle High Byte High Time of PWM

High Time = (Duty Cycle High Byte:Duty Cycle Low

Byte) / 32768

Duty Cycle = High Time / Period High:Period Low 0x03 Duty Cycle Low Byte 0x04 Max. Output High Byte Maximum Duty Cycle Output (PWM High Time)

Max High Tim e = (Duty Cycl e High Byte:D uty Cycle Low

Byte) / 32768

Duty Cycle = Max High Time / Period High:Period Low 0x05 Max. Output Low Byte 0x06 Min. Output High Byte Minimum Duty Cycle Output (PWM High Time)

Min High Time = (Dut y C ycle H ig h Byt e:D uty Cyc le Lo w

Byte) / 32768

Duty Cycle = Min High Time / Period High:Period Low 0x07 Min. Output Low Byte 0x08 Period High Byte Duty Cycle Period

Period = (Period High Byte: Period Low Byte) / 32768 0x09 Period Low Byte

0x0A Up per Temperature

High Byte

0x0B Up per Temperature

Low Byte

0x0C Lower Temperature

High Byte

0x0D Lower Temperature

Low Byte

0x0E Tach Speed High Byte Tachometer Measurement

0x0F Tach Speed Low Byte 0x10 STATUS Bit <7:1> = 0

Upper Temperature Set Point

Upper Temperature (degC) = [((Upper Temperature

High Byte:Upper Temperature Low Byte) / 1023)) - .50] /

.010

Lower Temperature Set Point

Lower Temperature (degC) = [((Lower Temperature

High Byte:Lower Temperature Low Byte) / 1023)) - .50] /

.010

Frequency = 32768 / Tach Speed High Byte: Tach

Speed Low Byte

RPM = (Frequency / 2) * 60

Bit 0 = Heating Element Enable (0 = Off, 1 = On)

TABLE B-4: SERIAL EEPROM: 0XA8

REG NAME DESCRIPTION

0x00-0xFF Data EEPROM Data Byte

PICDEM™ System Management User’s Guide

NOTES:

PICDEM™ System Management User’s Guide

WORLDWIDE SALES AND SERVICE

AMERICAS

Corporate Office

2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com

Atlanta

Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455

Boston

Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088

Chicago

Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075

Dallas

Addison, TX Tel: 972-818-7423 Fax: 972-818-2924

Detroit

Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260

Kokomo

Kokomo, IN Tel: 765-864-8360 Fax: 765-864-8387

Los Angeles

Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608

Santa Clara

Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445

Toronto

Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509

ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor Tower 6, The Gateway Habour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431

Australia - Sydney

Tel: 61-2-9868-6733 Fax: 61-2-9868-6755

China - Beijing

Tel: 86-10-8528-2100 Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8665-5511 Fax: 86-28-8665-7889

China - Fuzhou

Tel: 86-591-8750-3506 Fax: 86-591-8750-3521

China - Hong Kong SAR

Tel: 852-2401-1200 Fax: 852-2401-3431

China - Qingdao

Tel: 86-532-8502-7355 Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5533 Fax: 86-21-5407-5066

China - Shenyang

Tel: 86-24-2334-2829 Fax: 86-24-2334-2393

China - Shenzhen

Tel: 86-755-8203-2660 Fax: 86-755-8203-1760

China - Shunde

Tel: 86-757-2839-5507 Fax: 86-757-2839-5571

China - Wuhan

Tel: 86-27-5980-5300 Fax: 86-27-5980-5118

China - Xian

Tel: 86-29-8833-7250 Fax: 86-29-8833-7256

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-4182-8400 Fax: 91-80-4182-8422

India - New Delhi

Tel: 91-11-4160-8631 Fax: 91-11-4160-8632

India - Pune

Tel: 91-20-2566-1512 Fax: 91-20-2566-1513

Japan - Yokohama

Tel: 81-45-471- 6166 Fax: 81-45-471-6122

Korea - Gumi

Tel: 82-54-473-4301 Fax: 82-54-473-4302

Korea - Seoul

Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934

Malaysia - Penang

Tel: 60-4-646-8870 Fax: 60-4-646-5086

Philippines - Manila

Tel: 63-2-634-9065 Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870 Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-572-9526 Fax: 886-3-572-6459

Taiwan - Kaohsiung

Tel: 886-7-536-4818 Fax: 886-7-536-4803

Taiwan - Taipei

Tel: 886-2-2500-6610 Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351 Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-39 Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828 Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0 Fax: 49-89-627-144-44

Italy - Milan

Tel: 39-0331-742611 Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399 Fax: 31-416-690340

Spain - Madrid

Tel: 34-91-708-08-90 Fax: 34-91-708-08-91

UK - Wokingham

Tel: 44-118-921-5869 Fax: 44-118-921-5820

12/08/06

Microchip Technology PICDEM System Management User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Chapter 1. PICDEM™ System Management

1.1 INTRODUCTION

1.2 HIGHLIGHTS

1.3 PICDEM™ SYSTEM MANAGEMENT KIT CONTENTS

1.4 PICDEM SYSTEM MANAGEMENT LAYOUT

1.4.1 Board Features

1.4.2 Board Connections

FIGURE 1-1: PICDEM™ SYSTEM MANAGEMENT BOARD

FIGURE 1-2: PICkit™ SERIAL ANALYZER PINOUT

1.4.3 Heating Element

1.4.4 Board Options

1.5 QUICK START GUIDE

1.5.1 Demonstration Program

1.5.2 Real-Time Clock: Address 0xA2

FIGURE 1-3: REAL-TIME CLOCK

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

FIGURE 1-4: ANALOG-TO-DIGITAL CONVERTER (ADC)

1.5.4 Serial EEPROM: Address 0xA8

FIGURE 1-5: SERIAL EEPROM

1.5.5 Thermal Management: Address 0xA6

FIGURE 1-6: THERMAL MANAGEMENT

1.5.6 General I2C

Chapter 2. Background

2.1 INTRODUCTION

2.2 HIGHLIGHTS

2.3 PICDEM™ SYSTEM MANAGEMENT AND PICKIT™ SERIAL ANALYZER

2.4 FAN SPEED CONTROL

2.4.1 Two-wire Fan

2.4.2 Three-wire Fan

FIGURE 2-1: THREE-WIRE

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

FIGURE 2-2: PULSE STRETCHING

2.4.4 Four-wire Fan Control

Chapter 3. Troubleshooting

3.1 INTRODUCTION

3.2 COMMON PROBLEMS

3.2.1 Serial Communications does not appear to be working

3.2.3 The fan is not providing proper feedback

3.2.4 Heating element is not heating

3.2.5 Temperature is not changing

Appendix A. Hardware Schematics

A.1 INTRODUCTION

FIGURE A-2: SCHEMATIC SHEET 2

B.1 INTRODUCTION

Appendix B. Register Maps