Texas Instruments MCF8329EVM User manual

EVM User's Guide: MCF8329EVM
MCF8329 Evaluation Module
Description
The MCF8329EVM allows users to evaluate the
performance of a MCF8329 motor driver. The EVM
includes an onboard FTDI chip to convert USB
communication, from the micro-USB connector, into
UART. An onboard MSP430FR2355 microcontroller
(MCU) translates the UART communication into either
control signals or SPI formatted data, which is
sent to the MCF8329 device. There are many user-
selectable jumpers, resistors, connectors, and test
points to assist with evaluating the many features of
the MCF8329 IC and the configurable device-specific
settings.
Get Started
1. Download the latest design files from the
MCF8329EVM tool page on ti.com
2. Download the latest version of the Motor Studio
GUI and firmware from the Motor Studio tool page
on ti.com
Features
• GUI software to simplify the MCx tuning process
and performance evaluation
• MCU-to-MCx shunt jumper header with removable
shunts to disconnect main signals going to the
motor driver IC from the MCU
– The shunts can be removed if the user desires
to control the MCF8329 IC with an external
MCU or to use the EVM MCU to control an
external MCF8329 IC
Applications
•Cordless vacuum
•Cordless garden tools
•CPAP machine
•Ventilator
• Server fans
MCF8329EVM (Top View)
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1 Evaluation Module Overview
1.1 Introduction
This document is provided with the MCF8329 customer evaluation module (EVM) as a supplement to the
MCF8329 data sheet. This user's guide details the hardware setup instructions, GUI installation, and usage
instructions.
CAUTION
Hot surface temperature
The EVM can have high surface temperatures marked by the FIRE triangular symbol on the EVM.
Avoid toughing the marked hot surface are when driving high currents to prevent potential burn
damage.
1.2 Kit Contents
Table 1-1 lists the contents of the EVM kit. Contact the Texas Instruments Product Information Center nearest to
you if any components are missing. TI highly recommends that users check the TI website at https://www.ti.com
to verify that the latest version of the related software is being used.
Table 1-1. Kit Contents
Item Quantity
MCF8329EVM 1
USB A Male-to-USB B Micro Male Cable 1
1.3 Specification
The MCF8329EVM can support voltages up to 60 V and currents up to 30 A. To prevent damage to both the IC
and the EVM, confirm that these voltage and current specifications are not exceeded.
1.4 Device Information
The MCF8329 is a 4.5-V to 60-V, three-phase brushless-DC gate driver IC with code-free sensorless field
oriented control (FOC) for motor drive applications. The device provides three half-bridge gate drivers, each
capable of driving high-side and low-side N-channel power MOSFETs. The device generates the correct gate
drive voltages using an internal charge pump and enhances the high-side MOSFETs using a bootstrap circuit. A
trickle charge pump is included to support 100% duty cycle. The gate drive architecture supports peak gate drive
currents up to 1-A source and 2-A sink.
The internal sensorless FOC algorithm is highly configurable through register settings in a non-volatile EEPROM
ranging from motor start-up behavior to closed loop operation, which allows for the device to operate stand-alone
once the device has been configured. Motor current is sensed using an integrated current sense amplifier
supporting a single external shunt resistor. The device can receive a speed command through a PWM input,
analog voltage, variable frequency square wave, or I2C command. There are a large number of protection
features integrated into the MCF8329, intended to protect the device, motor, and system against fault events.
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2 Hardware
2.1 Quick Start Guide
The MCF8329EVM requires a power supply source, which has a recommended operating range from a 4.5-V to
60-V. To setup and power the EVM, follow the sequence below:
1. Connect motor phases to A, B, and C on connector J11.
2. Do not turn on the power supply yet. Connect the motor supply to PVDD and GND on connector J10.
3. Select J6 to 5V_USB and J8 to 3V3COM to power MSP430 from USB power supply.
4. Connect the micro-USB cable into the computer.
5. Turn the potentiometer fully clockwise to set the motor to zero speed upon power up.
6. Flip the switch S1 to the top to configure BRAKE = RUN, switch S2 to the top to configure DRVOFF = ON,
switch S3 to the bottom to configure DIR = ABC, and switch S4 to the bottom to configure WAKE.
7. Flip the switch SW1 to left to configure SPEED/WAKE pin to SPEED mode and DACOUT/SOx/SPEED_ANA
pin to DACOUT mode. Note that flipping the switch SW1 to right configures SPEED/WAKE pin to WAKE
mode and DACOUT/SOx/SPEED_ANA pin to SPEED_ANA mode. When SW1 is flipped to right, switch S4
can be used to put the device in SLEEP or WAKE mode and potentiometer R47 can be used to apply analog
voltage to the DACOUT/SOx/SPEED_ANA pin.
8. Set J12 to leftmost position (closer to C6) to apply AVDD to VREG.
9. Set J13 to middle position to apply the analog voltage from potentiometer R47 to the SPEED/WAKE pin.
10. Turn on the motor power supply.
11. Use the potentiometer R47 to control the speed of the motor and the switches to disable the motor driver,
change the direction, or apply a brake to the motor. Optionally, use the GUI (as shown in Section 3) to
monitor the real-time speed of the motor, put the MCF8329 into a low-power sleep mode, and read status of
the LEDs.
Figure 2-1. Reference for Quick Start Guide
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2.2 Hardware Setup
The hardware required to run the motor is the MCF8329EVM, a micro-USB cable, and a power supply with a DC
output from 4.5-V to 60-V. Follow these steps to start up the MCF8329EVM:
1. Connect the DC power supply to header J10. Connect to PVDD and GND.
2. Apply user configurable jumper settings. See Section 2.7 for more information.
3. Flash the firmware into the MCU as described in Section 3.4. Launch Motor Studio and disconnect the 4-pin
JTAG connections.
4. Turn on the power supply to power up the MCF8329EVM.
5. Connect a Micro-USB cable to the MCF8329EVM and computer.
If using the MCF8329EVM with an external microcontroller, then remove all shunt jumpers from jumper bridge
J9. Connect with external jumpers to the right side of the jumper bridge from the external MCU.
2.3 Hardware Connections Overview
Figure 2-2 shows the major blocks of MCF8329EVM. The MCF8329EVM is designed for an input supply from
4.5 V to 60 V at 30 A max. The MCF8329EVM includes a power stage with six external N-channel power
MOSFETs (part number: CSD18536KTTT) and passive components. The MCF8329EVM also includes a 1 mΩ
current sense shunt resistor and an external N-channel MOSFET controlled by GCTRL to generate VREG. For
interfacing with the GUI, the MCF8329EVM has an onboard FTDI chip and MSP430.
Figure 2-2. MCF8329EVM Major Hardware Blocks
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2.4 Connection Details
Figure 2-3 outlines which connections must be made to the MCF8329EVM in order to spin a 3-phase sensorless
brushless-DC motor.
Connect a 4.5-V to 60-V power supply to the PVDD and GND terminals on connector J10.
Connect the three phases of the BLDC motor to the A, B, and C terminals of the screw terminal connector J11.
Figure 2-3. Connections from Motor to MCF8329EVM
Figure 2-4 shows where the micro-USB cable is plugged into the MCF8329EVM to provide communication
between evaluation module and GUI. The USB data and 5 V power from the USB is converted, by the FTDI chip,
into UART data and 3.3 V power which is used to power the MSP430FR2355 microcontroller. The 5 V from the
USB power is limited to 500 mA and the 3.3 V from the FTDI chip is limited to 30 mA. If the user wants to supply
more current to these rails, then use the 5V_SEL jumper J6 and 3V3_SEL jumper J8 to connect external power
rails.
Figure 2-4. Micro-USB connector and USB-to-UART interface
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2.5 MSP430FR2355 Microcontroller
The MCF8329EVM includes a MSP430FR2355 low-power MCU, shown in Figure 2-5, to communicate via I2C
with the MCF8329 IC.
To program the MSP430FR2355, an external MSP430 FET programmer must be connected to the Spy-Bi-Wire
(SBW) interface connector J7. Many MSP430 LaunchPads™ provide an onboard eZ-FET Debug Probe that can
be jumper-wired to the MCF8329EVM to flash the firmware into the onboard MSP430FR2355 microcontroller.
The user can use the Reset (RST) button at any time to restart the MCU program. Two active-low LEDs, D13
and D14, can be used for debug purposes as well.
The 32-pin shunt jumper bridge J9 ties all signals between the microcontroller and MCF8329 IC. These jumpers
can be inserted or removed as needed to isolate the microcontroller from the gate driver. This allows for
microcontroller signal debugging or using the MCF8329EVM as a standalone gate driver with an external
microcontroller.
Figure 2-5. MSP430FR2355 MCU on MCF3829EVM
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2.6 LED Lights
The MCF8329EVM has 5 status LEDs that provide the status of power supplies and functions of the evaluation
module. By default, the PVDD LED and AVDD LED lights up when the board is powered and the program
has been flashed onto the microcontroller. Table 2-1 shows LED descriptions including those that are on during
power up in bold with Figure 2-6 showing the locations of the LEDs.
Table 2-1. Description of MCF8329EVM LEDs (Default in Bold After Power Up)
Designator Name Color Description
D1 3.3V Green Lights up when AVDD is turned ON
D2 nFAULT Red Lights up when fault condition has occurred on
MCF8329
D3 PVDD Green Lights up when voltage is applied on PVDD
D13 MSP_LED1 Red Used for UART or debugging
D14 MSP_LED2 Red Used for UART or debugging
Figure 2-6. MCF8329EVM LED Locations
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2.7 User Configurable Settings
The MCF8329EVM includes a variety of user-selectable jumpers, switches, and resistors on the entirety of the
evaluation board to configure settings. Table 2-2 summarizes all of these configurable settings.
Table 2-2. Description of User-Selectable Settings on MCF8329EVM (Default in Bold)
Designator Setting Name Description Layer Position Function
J8 3V3_SEL Select 3.3 V source for MCU power Top J8 = 3V3EXT External
J8 = 3V3COM From FTDI (30 mA)
J6 5V_SEL Select 5 V source for FTDI power Top J6 = 5V_EXT External
J6 = 5V_USB From USB power (500 mA)
J13 SPEED_SEL Selects SPEED input source Top
J13 = EXT External EXT_SPEED test point
J13 = POT From Potentiometer R47
J13 = INT_PWM
From internal PWM. PWM Duty
cycle can be varied by rotating the
POT R47
J9
MSP to MCx
Shunt jumper
bridge
Connects signals from MVU and
user switches to MCF8329 when
jumpers are inserted
Top
DRVOFF_SW DRVOFF
DIR_SW DIR
BRAKE_SW BRAKE
SPEED_WAK SPEED/WAKE
MSP_POCI/SCL SCL
MSP_PICO/SDA SDA
MSP_CLK NC
MSP_STE NC
DAC/SPEED DAC/SPEED
MSP_A2 NC
MSP_A1 GCTRL
NC NC
MSP_nFAULT nFAULT
MSP_FGOUT FGOUT
NC NC
GND GND
J12 VREG_SEL Selects VREG power supply Top
Left position VREG powered by AVDD
Middle position VREG powered externally
Right position VREG powered by MOSFET Q7
J1 AVDD LED Connects AVDD LED to 3.3 V pull
up Top Connected D1 lights up when AVDD is turned ON
J2 nFAULT LED Connects nFAULT LED to 3.3 V
pull up Top Connected D2 Lights up when nFAULT is
pulled low
J3 PVDD LED Connects PVDD LED to 3.3 V pull
up Top Connected D3 lights up when voltage is
applied to PVDD
S1 Brake Turns on all low-side MOSFETs Top Bottom Break enabled
Top Brake disabled
S2 DRVOFF Disables gate drivers Top
Bottom MCF8329 Disabled
Top MCF8329 Disabled
S3 DIR Controls direction of motor rotation Top Bottom ABC
Top ACB
S4 SPEED/WAKE Pulls SPEED/WAKE pin to AVDD
and GND Top Bottom SPEED/WAKE pin pulled to AVDD
Top SPEED/WAKE pin pulled to GND
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Table 2-2. Description of User-Selectable Settings on MCF8329EVM (Default in Bold) (continued)
Designator Setting Name Description Layer Position Function
SW1 N/A
Configure SPEED/WAKE pin to
SPEED mode and DACOUT/SOx/
SPEED_ANA pin
Top
Left
Configure SPEED/Wake pin to
SPEED mode and DCAOUT/SOx/
SPEED/ANA pin to DACOUT mode
Right
Configure SPEED/WAKE pin to
WAKE mode and DACOUT/SOx/
SPEED_ANA pin to SPEED_ANA
mode
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3 Software
3.1 Firmware and GUI Application
The MCF8329EVM includes a USB-to-UART interface, using a MSP430FR2355 microcontroller, that serves as a
communication bridge between a host PC and the MCF8329 device for configuring various device settings and
reading fault diagnostic information.
The MCF8329EVM is supported on the Motor Studio GUI which can be used to configure the MCF8329 though
this communication interface. The Motor Studio GUI simplifies the tuning process of the MCF8329 by offering
guided tuning instructions, a virtual oscilloscope for real-time variable monitoring, and more. The latest version of
the Motor Studio GUI can be downloaded on ti.com.
By default, the onboard MSP430 microcontroller already contains the firmware needed to communicate with the
Motor Studio GUI. If there is a firmware update or the GUI does not connect to the EVM, then the user must
flash the firmware code into the MSP430 by following the steps outlined in Section 3.4.
Flashing the firmware code onto the MSP430 requires an integrated development environment (IDE) and
an eZ-FET Debug Probe. The following example uses the Code Composer Studio™(CCS) IDE and the MSP-
EXP430FR2355 LaunchPad™ Development Kit to provide the eZ-FET Debug Probe.
3.2 Downloading and Running Motor Studio
1. Connect the MCF8329EVM as described in Section 2.2.
2. Download the latest version of the Motor Studio GUI.
3. Once the Motor Studio GUI is installed, run the Motor Studio GUI application.
4. Click the red Setup Now button under Hardware Setup on the bottom right side of the window.
5. After setting up the hardware settings of the MCF8329EVM, click on the Quick Spin option to begin
configuring the device.
Figure 3-1. Motor Studio GUI MCF8329A Home Page
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