Microchip Technology dsPICDEM MC1 Motor Control Development Board User guide

dsPICDEM™

MC1 Motor Control

Development Board

User’s Guide

 2003 Microchip Technology Inc. DS70098A

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 protect ion features of our
products. Attempts to break microchip’s 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
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical
components in life support systems is not authorized except
with express written approval by Microchip. No licenses are
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property rights.

Trademarks

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

EELOQ, MPLAB, PIC, PICmicro, PICSTART , PRO MA TE and

PowerSmart are registered trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.

FilterLab, microID, MXDEV, MXL AB, PICMASTER, SEEVAL
and The Embedded Control Solutions Company are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.

Accuron, Application Maestro, dsPICDEM, dsPICDEM.net,
ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In­Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
PICC, PICkit, PICDEM, PICDEM.net, PowerCal, PowerInfo,
PowerMate, PowerTool, rfLAB, rfPIC, Select Mode,
SmartSensor, SmartShunt, SmartT el and T otal Endurance are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.

Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.

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

© 2003, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.

Printed on recycled paper.

Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip’s quality system for the
design and manufacture of development
systems is ISO 9001 certified.

®

8-bit MCUs, KEELOQ

®

code hopping

DS70098A-page ii  2003 Microchip Technology Inc.

dsPICDEM™ MC1 MOTOR CONTROL

DEVELOPMENT BOARD

Table of Contents

Preface

Highlights.........................................................................1

About This Guide.............................................................1

Warranty Registration......................................................2

Recommended Reading ..................................................2

The Microchip Web Site ..................................................2

Development Systems Customer Notification Service .... 3

Customer Support ...........................................................3

Chapter 1. Setup and Operation

1.1 Introduction .......................................................... 5

1.2 About The System ...............................................6

1.3 Interface via the 37-Pin Connector - J1 ...............9

1.4 Port Allocations ..................................................12

1.5 Test Points .........................................................14

1.6 Power Module Connector Pinout (j1) .................15

1.7 Errata ................................................................. 16

Appendix A. Circuit Diagrams

Worldwide Sal e s a nd Se r vi c e.............. .. ... .. ...................... 2 2

© 2003 Microchip Technology Inc. DS70098A-page iii

dsPICDEM™ MC1 Motor Control Development Board

NOTES:

DS70098A-page iv © 2003 Microchip Technology Inc.

This chapter contains general information about this manual and contacting customer
support.

HIGHLIGHTS

Topics covered in this chapter:

• About this Guide

• Warranty Registration

• Recommended Reading

• The Microchip Web Site

• Development Systems Customer Notification Service

• Customer Support

ABOUT THIS GUIDE

Document Layout

dsPICDEM™ MC1 MOTOR CONTROL

DEVELOPMENT BOARD

Preface

This document describes how to use the Microchip dsPICDEM™ MC1 Motor Control
Development Board. The manual layout is as follows:

• Chapter 1: Introduction – This chapter introduces the dsPICDEM™ MC1 Motor
Control Development Board and provides a brief description of the hardware.

• Appendix A: Circuit Diagrams – This Appendix illustrates the dsPICDEM™
MC1 Motor Control Development Board layout and hardware schematic
diagrams.

• Worldwide Sales and Service – Lists Microchip sales and service locations and
telephone numbers worldwide.

Documentation Updates

All documentation becomes dated and this user’s guide is no exception. Since
MPLAB
customer needs, some actual dialogs and/or tool descriptions may differ from those in
this document. Please refer to our web site to obtain the latest documentation available.

®

IDE, MPLAB C1X and other Microchip tools are constantly evolving to meet

Documentation Numbering Conventions

Documents are numbered with a “DS” number. The 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 = The document number.
A = The revision level of the document.

© 2003 Microchip Technology Inc. DS70098A-page 1

dsPICDEM™ MC1 Motor Control Development Board

WARRANTY REGISTRATION

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

RECOMMENDED READING

This user’s guide describes how to use the dsPICDEM™ MC1 Motor Control
Development Board. The data sheets contain current information on programming the
specific microcont roll er devi ces.

THE MICROCH IP WEB SITE

Microchip provides online support on the Microchip World Wide Web (WWW) site. The
web site is used by Microchip as a means to make files and information easily available
to customers. To view the site, you must have access to the Internet and a web browser
such as Netscape Navigator

The Microchip web site is available by using your favorite internet browser to attach to:

http://www.microchip.com

The web site provides a variety of services. Users may download files for the latest
development tools, data sheets, application notes, user guides, articles and sample
programs. A variety of information specific to the business of Microchip is also
available, including listings of Microchip sales offices, distributors and factory
representatives.

®

or Microsoft® Internet Explorer.

Technical Support

• Frequently Asked Questions (FAQ)

• Online Discussion Groups - Conferences for products, Development Systems,
technical information and more

• Microchip Consultant Program Member Listing

• Links to other useful web sites related to Microchip products

Engineer's Toolbox

• Design Tips

• Device Errata

Other Availabl e Information

• Latest Microchip Press Releases

• Listing of Seminars and Events

•Job Postings

DS70098A-page 2 © 2003 Microchip Technology Inc.

DEVELOPMENT SYSTEMS CUSTOMER NOTIFICATION SERVICE

Microchip started the customer notification service to help our customers keep current
on Microchip products with the least amount of effort. Once you subscribe, you will
receive email notification whenever we change, update, revise or have errata related
to your specified product family or development tool of interest.

Go to the Microchip web site at (http://www.microchip.com) and click on Customer
Change Notification. Follow the instructions to register.

The Development Systems product group categories are:

• Compilers

•Emulators

• In-Circuit Debuggers

• MPLAB

• Programmers
Here is a description of these categories:
Compilers – The latest information on Microchip C compilers and other language

tools. These include the MPLAB C17, MPLAB C18 and MPLAB C30 C compilers;
MPASM™ and MPLAB ASM30 assemblers; MPLINK™ and MPLAB LINK30 object
linkers; MPLIB™ and MPLAB LIB30 object librarians.

Emulators – The latest information on Microchip in-circuit emulators. This includes the
MPLAB

In-Circuit Debuggers – The latest information on Microchip in-circuit debuggers.
These include the MPLAB

MPLAB IDE – The latest information on Microchip MPLAB
Integrated Development Environment for development systems tools. This list is
focused on the MPLAB
Project Manager and general editing and debugging features.

Programmers – The latest information on Microchip device programmers. These
include the PRO MATE
programmer.

®

IDE

®

ICE 2000 and MPLAB® ICE 4000.

®

ICD and MPLAB ICD 2.

®

IDE, MPLAB SIM and MPLAB SIM30 simulators, MPLAB IDE

®

II device programmer and PICSTART® Plus development

®

IDE, the Windows®

Preface

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Corporate Applications Engineer (CAE)

•Hotline
Customers should call their distributor, representative or field application engineer

(FAE) for support. Local sales offices are also available to help customers. See the
back cover for a list of sales offices and locations.

Corporate Applications Engineers (CAEs) may be contacted at [phone].
In addition, there is a Systems Information and Upgrade Line. This line provides system

users a list of the latest versions of all of Microchip's development systems software
products. Plus, this line provides information on how customers can receive any
currently available upgrade kits.

The Hotline Numbers are:
1-800-755-2345 for U.S. and most of Canada.
1-480-792-7302 for the rest of the world.

© 2003 Microchip Technology Inc. DS70098A-page 3

dsPICDEM™ MC1 Motor Control Development Board

NOTES:

DS70098A-page 4 © 2003 Microchip Technology Inc.

Chapter 1. Setup and Operation

1.1 INTRODUCTION

The Microchip dsPIC30F Motor Control Development Board has been designed to aid
the user in the rapid evaluation and development of motor control applications using
the Motor Control part s of the dsPI C
variant in the dsPIC family has been designed in.

The board may be used in two different ways. First is to interface to one of the custom
power modules that have been developed to complement the control board. The
interface is via the 37-pin, D-type connector J1. In this way, all the user has to supply
is a motor and they are ready to go without having to worry about the power stage and
signal conditioning. The power module has its own FAULT protection and signal isola­tion circuitry. There are many different feedback signals that the user can select
between to customize the system to their intended application. These are selected
internally within the power module.

The second use of the board is for customers who already have their own power stage
but are interested in evaluating the dsPIC MCU in their application. In this instance, the
user can easily interface to their own system via the connectors provided on the board.

Although targeted primarily at motor control applications, the board is also well suited
to static power conversion applications, such as Uninterruptible Power Supplies (UPS),
Power Factor Correctors (PFC) and Switch Mode Power Supplies (SMPS).

dsPICDEM™ MC1 MOTOR CONTROL

DEVELOPMENT BOARD

®

family. To maximize flexibility, the largest device

FIGURE 1-1: MOTOR CONTROL DEVELOPMENT BOARD WITH

ATTACHED POWER MODULE (SOLD SEPARATELY)

© 2003 Microchip Technology Inc. DS70098A-page 5

dsPICDEM™ MC1 Motor Control Development Board

1.2 ABOUT THE SYSTEM

1.2.1 Introduction

This chapter describes the features of the system.

1.2.2

The system has the dsPIC30F6010 80-pin TQFP part fitted as standard (U4).
An array of pins around the device allows the appropriate MPLAB ICE device adapter

to plug directly into the board without the need for the transition socket.

1.2.3

The main supply input to the system is via J2. Any power supply with a 2.1 mm plug
capable of delivering 9V, up to 1A with an unregulated AC or DC output, may be used.
After rectification and filtering, the digital +5V is created by U1, a 1A 2% tolerance linear
regulator. The tighter than standard tolerance is used to ensure correct optoisolator
drive and FAULT trip levels when using one of the power modules. The digital +5V is
available in the prototyping area (V
connectors.

A low current analog supply (AV
filter. This is used for the ADC in the dsPIC
via J1. It is also available in the prototyping area.

1.2.4

Processor

Power Supply

DD) as well as on several of the interface

DD) is create d fr om t he di git a l su ppl y via a p assi ve R C

®

device and for the analog feedback signals

In-Circuit Debugging and In-Circuit Serial Progr amming™ (ICSP™)

In-circuit debugging and serial programming of the FLASH memory contained within
the dsPIC device is supported via J4. This allows direct connection to the MPLAB
ICD 2 or the PRO MATE

The default pins used for dsPIC emulator communication and device programming are
AN1 and AN0. In order to maximize the number of ADC channels for use in motor
control, provision has been made to switch the emulator and programming pins to the
alternative pins of 59 and 60. These pins are shared with the low power secondary
oscillator module that is not used in the design. Switching between the two sets of pro­gramming pins should be done using S2 and the appropriate configuration bit settings
within the MPLAB environment. See the M PLA B IDE U ser's Gui de (D S 51025) for
details.

When S2 is switched to the ‘ICD’ position, the analog feedback signals are discon­nected from the AN0 and AN1 pins. The programming lines on J4 are connected. When
S2 is switched to the ‘Analog’ position, the programming lines are disconnected and
the analog signals are connected to AN0 and AN1.

®

II via the appropriate ICSP module.

®

DS70098A-page 6 © 2003 Microchip Technology Inc.

Setup and Operati on

1.2.5 Motor Position Feedback Interface

Interface to two different types of commonly used motor position feedback devices is
provided.

Note that no electrical isolation is provided on the board. The user must ensure that the
motor frame is correctly earthed (grounded) and that the position feedback devices are
isolated from the motor windings.

J3 (Halls) is intended for electrical commutation signals from (typically) Hall effect
devices. These signals are used for BLDC and SR motors and have edge transitions
aligned to the electrical cycle of the motor phases. The three inputs (A, B, C) are
connected to 3 input capture channels (IC1 - IC3) of the dsPIC device. Pull-up resistors
and a small amount of filtering are provided on the board. The inputs are therefore,
suitable for either open-collector or driven use. Clearly, the inputs can be used for any
input capture or I/O requirements the user may have.

J5 (QEI) is intended for a Quadrature (or Incremental) Encoder Interface. These
devices produce two position related pulse train outputs, 90° apart (A and B) and an
optionally index output (Z) that pulses once per revolution. A typical device will produce
many hundreds of pulses per revolution allowing high resolution position feedback and
high bandwidth speed measurement. The inputs have a very small amount of filtering.
Weak pull-down resistors are also fitted. The three inputs are connected through to the
dedicated inputs of the QEI module of the dsPIC device.

The digital power supply (+5V and 0V-"G") is brought out to the connectors for power­ing the transducers. Series inductors are used to reduce electrical noise entering the
board. The user should ensure there is adequate local decoupling of the power supply
at the position transducer end of the cable. The maximum current that may be drawn
from the +5V supply is 200 mA. If the user wishes to use a transducer that requires
more current, then an external power supply should be used with a common
connection between the grounds made on the G pin.

To minimize electrical noise, a shielded cable should be used.

1.2.6

A 7.3728 MHz, low profile crystal (Y1) is provided on the board. In combination with the
internal PLL and programmable postscaler of the dsPIC device, this allows a wide
range of system clock frequencies to be generated. A low profile component is used to
clear the emulator device adapter.

1.2.7

One of the dsPIC UARTs is connected to J8 via an RS-232 level shifting interface
implemented by U5 (MAX232A). Using RG2 and RG3 as port pins also provides
optional hardware handshaking using CTS and RTS. T o use the handshaking, the user
must install links LK6 and LK7. As RG2 and RG3 are multiplexed with the I
and data lines available on the digital prototyping header J7, both features can not be
used at once.

1.2.8

The second dsPIC UART is connected to J10 via an RS-485 level shifting interface
implemented by U8 (MAX485). A 120R terminating resistor may be connected across
the bus lines (A, B) by installing LK9. The user may (optionally) control the RX and TX
enable lines by driving RG0 and RG1. Pull-down resistors are used to ensure the RX
is enabled and the TX is disabled by default.

Oscillator

RS-232 Serial Port

RS-485 Serial Bus

2

C™ clock

© 2003 Microchip Technology Inc. DS70098A-page 7

dsPICDEM™ MC1 Motor Control Development Board

1.2.9 CAN bus

One of the CAN modules is connected to J9 via a Microchip MCP2551 CAN
Transceiver IC. A 120R terminating resistor may be connected across the bus lines by
installing LK8. A pull-down resistor ensures the TX stays inactive during RESET or if
the CAN module is not being used.

The second CAN module is available on the digital prototyping header on RG0 and
RG1. As these pins are used for the RS-485 RX and TX control, the RS-485 and the
second CAN module may not be used at the same time.

1.2.10

A 16x2 LCD display (U7) is included on the board. Communication to the display is via
the standard 4-bit interface method based on the well known Hitachi style communication
standard.

• The LCD data lines are on RD0-RD3.

• The Enable line is on RD13.

• The Read/Write

• The Data/Command Select (LCDRS) is on RC3.

1.2.11

Four general purpose LEDs (D6-D9) are provided on the board. These are connected
to RA9, RA10, RA14 and RA15, respectively.

A single LED (D2) is provided to indicate the +5V supply is on.
A single LED (D5) is provided to indicate direction of rotation. This is connected to RD7.

When using a quadrature encoder via J5, RD7 may be automatically driven by the QEI
module to indicate direction. Otherwise, this line must be driven as a port pin.

1.2.12 Push Button Switches

Four general purpose push button switches are provided (S4-S7). These are
connected to RG6-RG9, respectively.

A RESET switch is also provided (S1) and connected to the MCLR
device.

A TRIP switch (S3) is provided which is wire ORed with an active low FAULT signal
from J1. The resulting signal (FAULT
ule and the OCFB input of the Output Compare module. When correctly configured in
software, the TRIP switch will therefore, cause all the PWM channels to be driven to
their inact ive stat e and OC chann els 5-8 to be tr i-stat ed. Thus, the power st age may be
shut down independent of software intervention. To configure the OC channels to use
this feature, the OCM bits of OCxCON (x = 5-8) should all be set. To configure the PWM
module to use this feature, the appropriate bits in the FLTACON register should be set.

LCD Display

is on RC1.

LEDs

line of the dsPIC

) is connected to the FLTA input of the PWM mod-

1.2.13

Two potentiometers (VR1 and VR2) are provided on the board.
VR2 is permanently connected to the AN7 input of the ADC.
VR1 is only brought to the analog prototyping header J6 as POT1 owing to analog

channel constraints. If the user is not using the VPH_#1 analog feedback signal from
J1, then VR2 may be easily connected to AN12 by placing a 0.1" jumper across J6.
Alternatively, VR2 may be connected to any other spare analog channel by soldering a
wire link between the appropriate pins of J6.

DS70098A-page 8 © 2003 Microchip Technology Inc.

Potentiometers

1.2.14 Prototyping Area

A 0.1" pitch prototyping area is provided on the board.
Digital (V

corners.
J6 provides access to all the ADC channels as well as having unassigned analog

signals on it.
J7 provides access to any optional or unassigned digital I/O pins.

DD/VSS) and analog (AVDD/AVSS) power supplies are provided in the four

1.3 INTERFACE VIA THE 37-PIN CONNECTOR - J1

1.3.1 Introduction

The 37-pin, D-type connector (J1) and the associated signal routing and circuitry have
been designed to directly interface with one of the custom power modules that are
available. These complement this board by removing the need for the user to have their
own power stage. The power modules contain all the necessary driving circuitry , have
robust FAULT protection and many different feedback signals. For details as to the
interfacing requirements, feedback scaling and power capabilities for the particular
power module, the user should consult the power module documentation.

Due to the finite number of ADC channels and the fact that some of the pins are shared
with other modules, it is not possible to connect all of the power module feedback
signals to the ADC module at the same time.

In general, up to four phase motors have been allowed for in terms of firing signals and
feedback information. Given that 4-phase motors are not all that common, where
compromises were needed owing to ADC or input pin restriction, 3-phase motors have
been given preference.

A small amount of RC filtering is used on all the analog feedback signals for ESD
protection and noise suppression. The resistors have been chosen to have minimal
impact on ADC acquisition time.

Setup and Operati on

1.3.2

A total of ten PWM signals are routed to the 37-pin connector via high current 74AC244
buffers. The output of the buffers directly drives the LEDs of the optocouplers, as well
as LEDs that are visible through the front of the enclosure of the power module.

Note: The 74AC244 buffers are not required in most designs. The dsPIC PWM

In order to ensure correct operation of the firing signal outputs via J1 when the inputs
to the buffers are tri-stated, an overall active low FIRE_ENABLE control line is used via
RD11. The FIRE_ENABLE line is pulled up via R14 and must be pulled low by the
user's software to enable the buffers.

Eight of the firing commands come from the Motor Control PWM module. Of these
eight, two are optional owing to the limited number of pins on the connector. These are
the Phase#4 firing commands. They are shared with two of the back EMF crossing
signals. As delivered, the board is configured to use the back EMF crossing signals –
LK4 and LK5 are fitted in position 2-3.

Two of the firing commands used for the brake chopper and PFC come from output
compare channels 5 and 6. These channels should be configured in the PWM mode
with the FAULT pin enabled.

Switch Firing Commands

pins can drive most gate drive circuitry directly. Refer to the device data
sheet for further details. The buffers provide protection of the dsPIC I/O pins
in a development environment and provide drive strength for the loads
presented by the power module interface circuitry.

© 2003 Microchip Technology Inc. DS70098A-page 9

dsPICDEM™ MC1 Motor Control Development Board

1.3.3 Current Feedback from the Power Modules

1.3.3.1 PFC

When an active power factor corrector is used, a Hall effect isolated current transducer
is included on the power module design to measure the input current. This signal is
assigned to AN6.

1.3.3.2 BRAKE CHOPPER

Although not strictly required for correct control of a brake chopper, feedback of the
amplified shunt voltage is provided. This signal is brought to the analog prototyping
header J6 as BR_SHUNT. If AN14 is not already in use, then a 0.1" jumper may be
used to easily connect BR_SHUNT to AN14. Alternatively, a wire link may be soldered
into J6 to assign BR_SHUNT to any other available channel.

1.3.3.3 MOTOR POWER STAGE

Owing to phase sym metry of motors and th e conn ection t o the ir phas es, a sep a rate cur­rent transducer is not necessar ily require d per phase. This has been t aken advant age of
to reduce the numb er of fe ed b ack sign al s as is d on e in commercial applications .

Two alternative sets of current feedback signals have been allowed. The two sets
represent signals from transducers measuring output current to the motor or those
measuring switch currents referenced to the -DC bus. A given application tends to use
one type or the other depending on isolation, accuracy and cost requirements.

A maximum of 3 output transducers is allowed along with up to 4 switch shunts.
LK1-LK3 are used to change o ver between t he two sets of signals for Phase#1-Phase# 3.

In this inst ance, the isolat ed signal s come f rom Hall effe ct transd ucers. A s delivered , the
isolated signal s ar e sel ect ed to mat ch th e (d ef au lt ) iso la te d conf ig ura t ion of the po w er
module. The Phase#1-Phase#3 current feedback signals are allocated to AN0, AN1 and
AN2. This has been done so that simultaneous sampling may be carried out on all three
phases. This is es pe cia lly imp ortant for certain m ot or co nt ro l al go rit hm s.

The fourth shunt (if used) is allocated to AN10.
Note that the ICD/ICSP data and clock lines must be reallocated before the Phase#1

and Phase#2 current feedback channels may be used. See Section 1.2.4 for details.

1.3.3.4 DC BUS SHUNT FEEDBACK

Feedback of the current in the -DC bus shunt is provided.
This signal (BUS_SHUNT) is assigned to AN8

1.3.4

1.3.4.1 ISOLATED VOLTAGE FEEDBACK

Isolated voltage feedback signals are accommodated through the use of a PIC12C671
located within the power module. This device has its own ADC and communicates with
the dsPIC device via a simple 2-wire (clock and data) serial communications interface.
These signals are assigned to SCLK1 and SDI1 via RF6 and RF7.

Re-synchronization of the serial link is achieved by asserting the FAULT_RESET line
on RE9 for a minimum of 2 µs provided a FAULT does not already exist. For details of
the serial communication protocol, refer to the power module documentation.

The two signals passed back are the DC bus voltage and, for AC input power modules
with PFC, the rectified AC voltage.

A small amount of passive filtering is used on the clock and data lines to remove noise
spikes.

DS70098A-page 10 © 2003 Microchip Technology Inc.

Voltage Feedback

Setup and Operati on

1.3.4.2 POWER MODULE OUTPUT VOLTAGE FEEDBACK Up to 4 power module output voltage feedback signals are accommodated. These

signals may be useful for detection of position or speed (i.e., so called sensorless
operation). Alternatively , they may be used to correct for output voltage distortion which
occurs due to power device voltage drops and dead-time.

The signals are referred to as VPH_#1 - VPH_#4. VPH_#1 - VPH_#3 are assigned to
AN12-AN14, respectively. VPH_#4 is only brought to the analog prototyping header J6
and must be manually assigned if required.

1.3.4.3 DC BUS VOLTAGE AND RECTIFIED AC VOLTAGE FEEDBACK The DC bus voltage and, for AC input power modules with PFC, the rectified AC

voltage is accommodated.
The DC bus voltage is assigned to AN11.
The rectified AC voltage, if used, is assigned to AN9.

1.3.5

One method of operating a brushless DC motor without a position sensor has been
included in the design of certain power modules. This method relies on detecting when
the voltage of an inactive phase's output lead, due to it's back EMF, crosses the nomi­nal center point of the DC bus. Comparators are included within the power module
which detect the crossover points.

Three such crossover signals are accommodated in the design. Two of these signals
can not be used at the same time as the Phase#4 firing signals (which are not required
by the power modules that provide the back EMF crossing signals).

If the user wishes to use the back EMF crossing signals then they must do the
following:

• Make sure LK4 and LK5 are in position 2-3.

• Make sure that no Hall commutation transducer is connected to J3. This is
because the three input capture channels are common.

Back EMF Crossing Detection

© 2003 Microchip Technology Inc. DS70098A-page 11

dsPICDEM™ MC1 Motor Control Development Board

1.4 PORT ALLOCATIONS

The following t able shows the p rimary port alloca tions for the dsP IC30F6010 as requ ired
for interfacing to one of the custom power modules via J1. Where a primary assignment
and use is not shown, the pin is available on one of the prototyping headers.

The pin headers give access to all pins. In addition, certain other pins are routed to the
analog (J6) and digital (J7) prototyping headers.

Pin No. Port Port No.

23 A 9 RA9 LED1 (D6)
25 A 10 RA10 LED2 (D7)
52 A 14 RA14 LED3 (D8) —

53 A 15 RA15 LED4 (D9) —
20 B 0 AN0 PHASE#1_I_F/B via J1 ICSP™ Data if S2 in PRI Position
19 B 1 AN1 PHASE#2_I_F/B via J1 ICSP Clock is S2 in PRI Position
18 B 2 AN2 PHASE#3_I_F/B via J1 ADC input via J6 (AN2) (LK3-NF)
17 B 3 INDX INDEX for QEI via J5 (Z) ADC input via J6 (AN3) or Pin5 J5
16 B 4 QEA QEI Channel A via J5 (A) ADC input via J6 (AN4) or Pin3 J5
15 B 5 QEB QEI Channel B via J5 (B) ADC input via J6 (AN5) or Pin4 J5
21 B 6 AN6 PFC HALL via J1 ADC input via J6 (AN6)
22 B 7 — — AN7/RB7 via J6 (AN7)
27 B 8 AN8 BUS_SHUNT via J1 ADC input via J6 (AN8)
28 B 9 AN9 VAC_SENSE ADC input via J6 (AN9)
29 B 10 AN10 PHASE#4_SHUNT ADC input via J6 (AN10)
30 B 11 AN11 VLINK_SENSE ADC input via J6 (AN11)
33 B 12 AN12 VPH_#1 ADC input via J6 (AN12)
34 B 13 AN13 VPH_#2 ADC input via J6 (AN13)
35 B 14 AN14 VPH_#3 ADC input via J6 (AN14)
36 B 15 OCFB Active Low FAULT from power

4 C 1 RC1 LCD R/W Line —

5 C 3 RC3 LCD RS Line —
59 C 13 — ICSP Data if S2 in ALT Position —
60 C 14 — ICSP Clock if S2 in ALT Position —
58 D 0 RD0 LCD0 (LSB) —
61 D 1 RD1 LCD1 —
62 D 2 RD2 LCD2 —
63 D 3 RD3 LCD3 (MSB) —
66 D 4 OC5 BRAKE_FIRE via J1 —
67 D 5 OC6 PFC_FIRE via J1 —
68 D 6 — — OC7/CN15/RD6 via J7 (RD6)
69 D 7 UPDN QEI UP/DOWN Output to

54 D 8 IC1 Phase A Position Hall via J3 (A) Back EMF Crossing #1 via J1 if

55 D 9 IC2 Phase B Position Hall via J3 (B) Back EMF Crossing #2 via J1 if

56 D 10 IC3 Phase C Position Hall via J3 (B) Back EMF Crossing #3 via J1
57 D 11 RD11 Active Low FIRE_ENABLE —
64 D 12 — — IC5/RD12 via J7 (RD12)
65 D 13 RD13 LCDENA —

Pri

Assignment

Pri Use Suggested Alternative Use

REF- via J6 (RA9) (D6–NF)

V

V

REF+ via J6 (R10) (D7–NF)

module of TRIP switch

RD7 output to Direction LED (D5)

Direction LED (D5)

LK4 in Position 2-3

LK5 in Position 2-3

—

DS70098A-page 12 © 2003 Microchip Technology Inc.

Setup and Operati on

Pin No. Port Port No.

Pri

Assignment

Pri Use Suggested Alternative Use

37 D 14 — — IC7/CN20/RD14 via J7 (RD14)
38 D 15 — — IC8/CN21/RD15 via J7 (RD15)
76 E 0 PWM0 PHASE#1_LOW_FIRE via J1 —
77 E 1 PWM1 PHASE#1_HIGH_FIRE via J1 —
78 E 2 PWM2 PHASE#2_LOW_FIRE via J1 —
79 E 3 PWM3 PHASE#2_HIGH_FIRE via J1 —
80 E 4 PWM4 PHASE#3_LOW_FIRE via J1 —

1 E 5 PWM5 PHASE#3_HIGH_FIRE via J1 —
2 E 6 PWM6 PHASE#4_LOW_FIRE via J1 if

—

LK4 Fitted 1-2

3 E 7 PWM7 PHASE#4_HIGH_FIRE via J1 if

—

LK5 Fitted 1-2

13 E 8 FLTA Active Low FAULT from power

—

module or TRIP switch
14 E 9 RE9 FAULT_RESET —
72 F 0 C1RX CAN_RX via J9 —
73 F 1 C1 TX CAN_TX via J9 —
42 F 2 U1RX RS232_RX via J8 —
41 F 3 U1TX RS232_TX via J8 —
39 F 4 U2RX RS485_RX via J10 U2RX/CN17/RF4 via J7 (RF4)
40 F 5 U2TX RS485-TX via J10 U2TX/CN18/RF5 via J7 (RF5)
45 F 6 SCLK1 ISO_VFB_CLK via J1 SCLK1/INT0/RF6 via J7 (RF6) if

isolated voltage f/b from power

module not required

44 F 7 SDI1 ISO_VFB_DATA via J1 SDI1/RF7 via J7 (RF7) if isolated

voltage f/b from powe r module not

required

43 F 8 — — SD01/RF8 via J7 (RF8)
75 G 0 RG0 RS485_RXENA C2RX/RG0 via J7 (RG0)
74 G 1 RG1 RS485_TXENA C2TX/RG1 via J7 (RG1)

47 G 2 RG2 RS232 RTS SCL/RG2 via J7 (RG2)
46 G 3 RG3 RS232 CTS SDA/RG3 via J7 (RG3)

6 G 6 CN8 Push Button S4 —
7 G 7 CN9 Push Button S5 —

8 G 8 CN10 Push Button S6 —
10 G 9 CN11 Push Button S7 —
49 — — OSC1 7.3728 MHz Crystal —
50 C 15 OSC2 7.3728 MHz Crystal —

9—— MCLR RESET via S1 ICD/ICSP via J8
25 — — AV
26 — — AV
12 — — V
32 — — V
48 — — V
71 — — V
11 — — V
31 — — V
51 — — V
70 — — V

DD Analog +5V —

DD Analog GND —
DD Digit al +5V —
DD Digit al +5V —
DD Digit al +5V —
DD Digit al +5V —
SS Digital GND —
SS Digital GND —
SS Digital GND —
SS Digital GND —

© 2003 Microchip Technology Inc. DS70098A-page 13

dsPICDEM™ MC1 Motor Control Development Board

1.5 TEST POINTS

The following test points are all located on the topside of the PCB. See Appendix A.1
for references to the net names on the schematics.

Test Point Signal Function Net Name

TP 1 Brake Chopper Shunt Feedback BR_SHUNT
TP 2 Phase#2 Shunt Feedback PHASE#2_SHUNT
TP 3 Phase#1 Shunt Feedback PHASE#1_SHUNT
TP 4 Phase#4 Low Side Firing Signal PHASE#4_LOW_FIRE
TP 5 Brake Chopper Firing Signal BRAKE_FIRE
TP 6 Phase#3 Low Side Firing Signal PHASE#3_LOW_FIRE
TP 7 Phase#2 Low Side Firing Signal PHASE#2_LOW_FIRE
TP 8 Phase#1 Low Side Firing Signal PHASE#1_LOW_FIRE

TP 9 Isolated Serial Interface Data Line ISO_VFB_DATA
TP 10 Active Low FAULT Line FAULT
TP 11 Phase#2 Hall Current Feedback PHASE#2_HALL
TP 12 Phase#4 Shunt Feedback PHASE#4_SHUNT
TP 13 Phase#3 Shunt Feedback PHASE#3_SHUNT
TP 14 Phase#4 High Side Firing Signal PHASE#4_HIGH_FIRE
TP 15 Power Factor Corrector Firing Signal PFC_FIRE
TP 16 Phase#3 High Side Firing Signal PHASE#3_HIGH_FIRE
TP 17 Phase#2 High Side Firing Signal PHASE#2_HIGH_FIRE
TP 18 Phase#1 High Side Firing Signal PHASE#1_HIGH_FIRE
TP 19 Isolated Serial Interface Clock Line ISO_VFB_CLK
TP 20 Phase#3 Hall Current Feedback PHASE#3_HALL
TP 21 Phase#2 Hall Current Feedback PHASE#1_HALL
TP 22 PFC Hall Current Feedback PFC_HALL
TP 23 RS-232 Transmit Data Line RS232_TX
TP 24 RS-232 Receive Data Line RS232_RX
TP 25 CAN Receive Data Line CAN_RX
TP 26 CAN Transmit Data Line CAN_TX
TP 27 RS-485 Transmit Data Line RS485_TX
TP 28 RS-485 Receive Data Line RS485_RX

DS70098A-page 14 © 2003 Microchip Technology Inc.

Setup and Operati on

1.6 POWER MODULE CONNECTOR PINOUT (J1)

Pin Function Net Name Input/Output Analog/Digital

1 Phase#4 Shunt Current Feedback PHASE#4_SHUNT Input Analog
2 Phase#2 Shunt Current Feedback PHASE#2_SHUNT Input Analog
3 DC Bus Shunt Current Feedback BUS_SHUNT Input Analog
4 Phase#4 Voltage Feedb ac k VPH_#4 Input Analog
5 Phase#2 Voltage Feedb ac k VPH_#2 Input Analog
6 Phase#3 Back EMF Crossing CAPTURE#3 Input Digital
7 Phase#1 Back EMF Crossing or Phase#4

Top Switch Firing Command depending

on LK4

8 Rectifier Output Voltage

(VAC) Feedback

9 +5V (±2%) Analog PSU ISO_A+5V Input Analog
10 PFC Switch Firing Command PFC_FIRE Output Digital
1 1 Phase#3 Top Switch Firing Command PHASE#3_HIGH_FIRE Output Digital
12 Phase#2 T op Swit ch Firi ng Comm an d PHASE#2_HIGH_FIRE Outp ut Digital
13 Phase#1 T op Swit ch Firi ng Comm an d PHASE#1_HIGH_FIRE Outp ut Digital
14 Isolated Voltage Feedback Serial Clock ISO_VFB_CLK Input Digital

15 Active Low FAULT Signal FAULT
16 Phase#2 Hall Current Feedback PHASE#2_HALL Input Analog
17 PFC Hall Current Feedback PFC_HALL Input Analog
18 Digital PSU 0V Return — Output Analog
19 +5V (±2%) Digital PSU — Output Analog
20 Phase#3 Shunt Current Feedback PHASE#3_SHUNT In put Analog
21 Phase#1 Shunt Current Feedback PHASE#1_SHUNT In put Analog
22 Brake Chopper Switch Shunt Current

Feedback
23 Phase#3 Voltage Feedback VPH_#3 Input Analog
24 Phase#1 Voltage Feedback VPH_#1 Input Analog
25 Phase#2 Back EMF Crossing or Phase#4

Bottom Switch Firing Command

depending on LK5
26 DC Bus Voltage Feedback BUS_SENSE Input Analog
27 Analog PSU 0V Return ISO_AGND Input Analog
28 Brake Chopper Switch Firing Command BRAKE_FIRE Output Digital
29 Phase#3 Bottom Switch Firing Command PHASE#3_LOW_FIRE Output Digital
30 Phase#2 Bottom Switch Firing Command PHASE#2_LOW_FIRE Output Digital
31 Phase#1 Bottom Switch Firing Command PHASE#1_LOW_FIRE Output Digital
32 Isolated Voltage Feedback Serial Data ISO_VFB_DATA Input Digital
33 Fault Reset Command FAULT_RESET Output Digital
34 Phase#3 Hall Current Feedback PHASE#3_HALL Input Analog
35 Phase#1 Hall Current Feedback PHASE#1_HALL Input Analog
36 Digital PSU 0V Return — Input Analog
37 +5V (±2%) Digital PSU — Input Analog

CAPTURE#1

PHASE#4_HIGH_FIRE

VAC_SENSE Input Analog

BRAKE_SHUNT Input Analog

CAPTURE#2

PHASE#4_LOW_FIRE

Input or Output Digital

Input Digital

Input or Output Digital

© 2003 Microchip Technology Inc. DS70098A-page 15

dsPICDEM™ MC1 Motor Control Development Board

1.7 ERRATA

On the REVA version of the PCB (identified as 04-01648 REVA near the TRIP switch),
the following issues should be noted:

• The pin marked as "D_SHUNT" on J6 is connected to the "BR_SHUNT" net.
Therefore, the label "D_SHUNT" should read "BR_SHUNT" to match the
schematics.

• The pin marked as "POT2" on J6 is connected to the "POT1" net and thus to VR1.
Therefore, the label "POT2" on J6 should read "POT1" to match the schematics.

• S2 has switch positions marked ‘ALT’ and ‘PRI’ on the PCB. These two positions
are marked ‘analog’ and ‘ICD’ on newer versions of the PCB. The switch function
is identical.

On REVA and REVB versions of the board, the following component values should be
changed for correct operation of the isolated voltage feedback:

• R23 and R24 should be 470Ω.

• C24 and C25 should be 33 pF.

DS70098A-page 16 © 2003 Microchip Technology Inc.

Appendix A. Circuit Diagrams

A.1 CIRCUIT DIAGRAMS

dsPICDEM™ MC1 MOTOR CONTROL

DEVELOPMENT BOARD

© 2003 Microchip Technology Inc. DS70098A-page 17

dsPICDEM™ MC1 Motor Control Development Board

DS70098A-page 18 © 2003 Microchip Technology Inc.

Circuit Diagrams

© 2003 Microchip Technology Inc. DS70098A-page 19

dsPICDEM™ MC1 Motor Control Development Board

DS70098A-page 20 © 2003 Microchip Technology Inc.

NOTES:

Circuit Diagrams

© 2003 Microchip Technology Inc. DS70098A-page 21

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DS70098A-page 22  2003 Microchip Technology Inc.