NXP Semiconductors Freescale MC9S12G128 MCU Manuale utente

3-Phase Sensorless BLDC

Motor Control Development Kit

with MC9S12G128 MCU

Quick Start Guide

3-Phase Sensorless BLDC

Motor Control Development Kit

with MC9S12G128 MCU

3-Phase

BLDC Motor

MC9S12G128

Controller Board

3-Phase

Low-Voltage

Power Stage

3-Phase Sensorless BLDC

Motor Control Development Kit Features

• MC9S12G128 MCU (100-pin LQFP)

• MC33905S system basis chip

• MC33937A FET pre-driver

• Sensorless BLDC motor control

support

• Hardware support for Hall sensor-

based motor control

• DC-bus overvoltage, overcurrent and

undervoltage detection

• FreeMASTER instrumentation/

visualization

Quick Start Guide

3-Phase Low-Voltage Power Stage

Motor

Connector

UNI-3

Interface

MC33937A

Interface

MC33937A

Overcurrent

Threshold

Setup

Brake Resistor

Power Supply

Connector

Power Supply

Terminal

MC9S12G128 Controller Board

Fault and Hall/

Zero-Cross

LED Indicators

USB

Connector

BDM

Connector

I/O Ring to

Allow Access

to All MCU

Pin Signals

Power Supply

Connector

Rotary

Switch

Hall Sensor

Interface

Connector

PWM LED

Indicators

UNI-3

Interface

LIN

Connector

CAN

Connector

MC33937A

Interface

Quick Start Guide

Step-by-Step Installation Instructions

Learn how to set up and use the development kit with the FreeMASTER tool.

Install Tools

and Drivers

• Install FreeMASTER runtime

debugging tool

• Install FTDI virtual COM port driver

The FTDI virtual COM port driver

installation file is available in the

“Downloads” section at

freescale.com/automcdevkits.

For FreeMASTER application

download, please visit

freescale.com/freemaster.

Connect the

USB Cable

Connect the MC9S12G128 controller

board to the PC using the USB cable.

Allow the PC to automatically configure

the USB drivers if needed.

Connect the

Power Supply

Connect 24 V/3 A power supply to the

power connector on the 3-phase

low-voltage power stage.

Power supply operation range is 8 to

24 V. The BLDC motor used is designed

for 24 V phase voltage.

1 2

Using the

FreeMASTER Project

• Download and unzip the application

software for the MTRCKTSBNG128

available at freescale.com/

automcdevkits.

• Open the FreeMASTER project

MTRCKTSBNG128/SW/

MC9S12G128_BLDC_Sensorless/

MC9S12G128_BLDC_Sensorless.

pmp.

• Set up the RS232 communication

port and speed in the menu Project/

Options. Set the communication

speed to 19200 Bd.

The COM port number can be found using

Windows Device Manager under “Ports

(COM & LPT)” section as “USB Serial Port

(COMn).”

• Press the red STOP button in the

FreeMASTER toolbar to enable the

communication.

Succesfull communication is signalized in

the status bar.

• To start the motor, set the ON/OFF

flip-flop switch ON or short press the

rotary switch on the MC9S12G128

controller board.

• Enter the required speed by changing

the value of the “requiredSpeed”

variable in the variables watch window,

by double clicking the speed gauge,

or by rotating rotary switch clockwise

(speed up) or counterclockwise

(speed down) on the MC9S12G128

controller board. The variable value is

in revolutions per minute.

• To stop the motor, set the ON/OFF

flip-flop OFF or short press the rotary

switch on the MC9S12G128 controller

board.

• To clear pending faults, click the green

Fault Clear button or long press the

rotary switch on the MC9S12G128

controller board.

Faults present in the system are

signalized by the fault indicators, pending

faults by small red LED-like indicator next

to the respective fault indicator.

Quick Start Guide for TWRPI-MMA845xQQuick Start Guide

MC9S12G128 MCU Controller Board

Jumper Options

The following is a list of all jumper options. The default jumper settings are shown in

white text within blue boxes.

Jumper Selector Functions Connections

J3 SBC Debug

Mode Enable

MC33905S Debug mode enabled On

MC33905S Debug mode disabled Off

J4 SBC Fail-Safe

Mode Enable

MC33905S Fail-safe mode enabled On

MC33905S Fail-safe mode disabled Off

J6 CAN - L

Termination

CAN - L termination On

No CAN - L termination Off

J7 CAN - H

Termination

CAN - H termination On

No CAN - H termination Off

J8 LIN Master

Termination

LIN Master Mode On

LIN Slave Mode Off

J18 Reset

Interconnection

MCU and SBC resets are connected On

MCU and SBC resets are not connected Off

J20,

J22

Phase A Dead

Time Insertion

Phase A dead time controlled by MC33937A 1-2

~2 μs phase A dead time generated by on-board HW 2-3

MC9S12G128 Controller Board

Jumper Options (continued)

J21,

J23

Phase C Dead

Time Insertion

Phase C dead time controlled by MC33937A 1-2

~2 μs phase C dead time generated by onboard

HW 2-3

J24,

J25

Phase B Dead

Time Insertion

Phase B dead time controlled by MC33937A 1-2

~2 μs phase B dead time generated by onboard

HW 2-3

J26

Fault

Processing

Select 0

Faults processed by onboard HW 1-2

Faults processed by MCU software (IRQ) 2-3

J27 Fault Action

Select

Onboard flip-flops disable PWM driving signals 1-2

Onboard HW drives MC33937A EN pin low 2-3

Faults processed by MCU software Off

J28

Fault

Processing

Select 1

Faults processed by onboard HW 1-2

Faults processed by MCU software (IRQ) Off

J29

Overcurrent

Detection

Select

Overcurrent detected by onboard comparator 1-2

Overcurrent detected by MC33937A int. comparator 2-3

J32,

J33,

J35

Control Signal

Selection

Hall sensor signals 1-2

MC33937A zero cross signals 2-3

Jumper Selector Functions Connections

Quick Start Guide

For more information, visit

freescale.com/automcdevkits

Freescale and the Freescale logo are trademarks of Freescale

semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. All other product or service

names are the property of their respective owners.

Doc Number: MTRCKTSBNG128QSG REV 0

Quick Start Guide

Support

Visit freescale.com/support for a list of phone

numbers within your region.

Warranty

Visit freescale.com/warranty for complete

warranty information.

Quick Start Guide

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