Freescale Semiconductor KIT912F634EVME User manual

© Freescale Semiconductor, Inc., 2013. All rights reserved.
Freescale Semiconductor, Inc.
User’s Guide
Document Number: KT912F634UG
Rev. 2.0, 10/2013
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KIT912F634EVME Evaluation Board
Featuring the MM912F634 Integrated S12-Based Relay Driver with LIN Device
Figure 1. KIT912F634EVME Evaluation Board
1 Kit Contents/Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Jump Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Important Notice. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 KIT912F634EVME Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5 Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6 Setup Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7 Hardware Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8 Software Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9 Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10 Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
12 References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
13 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Kit Contents/Packing List
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1 Kit Contents/Packing List
• MM912F634 Evaluation Board (EVB)
• Cable, 6FT. USB2.0 A-M to B-M
• Warranty Card, Freescale

Jump Start
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2JumpStart
•Gotowww.freescale.com/analogtools
•Locate your kit
• Review your Tool Summary Page
• Look for
• Download documents, software and other information
Jump Start Your Design

Important Notice
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3 Important Notice
Freescale provides the enclosed product(s) under the following conditions:
This evaluation kit is intended for use of ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES
ONLY. It is provided as a sample IC pre-soldered to a printed circuit board to make it easier to access inputs,
outputs, and supply terminals. This evaluation board may be used with any development system or other
source of I/O signals by simply connecting it to the host MCU or computer board via off-the-shelf cables. This
evaluation board is not a Reference Design and is not intended to represent a final design recommendation
for any particular application. Final device in an application will be heavily dependent on proper printed circuit
board layout and heat sinking design as well as attention to supply filtering, transient suppression, and I/O
signal quality.
The goods provided may not be complete in terms of required design, marketing, and or manufacturing related
protective considerations, including product safety measures typically found in the end product incorporating
the goods. Due to the open construction of the product, it is the user's responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. In order to minimize risks associated with the
customers applications, adequate design and operating safeguards must be provided by the customer to
minimize inherent or procedural hazards. For any safety concerns, contact Freescale sales and technical
support services.
Should this evaluation kit not meet the specifications indicated in the kit, it may be returned within 30 days from
the date of delivery and will be replaced by a new kit.
Freescale reserves the right to make changes without further notice to any products herein. Freescale makes
no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor
does Freescale assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages.
“Typical” parameters can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typical”, must be validated for each customer application by customer’s
technical experts.
Freescale does not convey any license under its patent rights nor the rights of others. Freescale products are
not designed, intended, or authorized for use as components in systems intended for surgical implant into the
body, or other applications intended to support or sustain life, or for any other application in which the failure
of the Freescale product could create a situation where personal injury or death may occur.
Should Buyer purchase or use Freescale products for any such unintended or unauthorized application, Buyer
shall indemnify and hold Freescale and its officers, employees, subsidiaries, affiliates, and distributors
harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of,
directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized
use, even if such claim alleges that Freescale was negligent regarding the design or manufacture of the
part.Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or
service names are the property of their respective owners.
© Freescale Semiconductor, Inc. 2013

KIT912F634EVME Introduction
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4 KIT912F634EVME Introduction
Freescale Semiconductor’s KIT912F634EVME is a system solution which gives the user the capability to easily
evaluate most of the features provided by the MM912F634 - integrated dual low-side and dual high-side switch
with embedded MCU and LIN transceiver for relay drivers. The MM912F634 features two dice in a single
package. The 16-bit core and the analog die are connected by means of the Die-to-Die interface that provides
direct address access to the registers on the analog die. The analog die contains HS and LS switches, as well
as a PWM module, ADC module, timer module, SCI module, LIN physical interface, and other general registers.
All external signals are accessible via header connectors, and most of the signals can also be checked via test
points. The evaluation module board also includes the TBDML programming/debugging interface, so no
external interface is needed. The board can be powered either from two 4.0 mm banana connectors or from the
LIN connector. For quick familiarization with the device, a graphical user interface, based on FreeMASTER
software, is provided together with the module. Thanks to the GUI, the user can easily evaluate the peripheral
modules, or directly access the registers on the analog die.
4.1 MM912F634 Features
• 16-Bit S12 CPU, 32 kByte FLASH, 2.0 kByte RAM
• Background Debug (BDM) and Debug Module (DBG)
• Die-to-die bus interface for transparent memory mapping
• On-chip oscillator and two independent watchdogs
• LIN 2.1 physical layer interface with integrated SCI
• Six digital MCU GPIOs shared with SPI (PA5…0)
• 10-bit, 15-channel - Analog-to-Digital Converter (ADC)
• 16-bit, 4-channel - Timer Module (TIM16B4C)
• 8-bit, 2-channel - Pulse Width Modulation module (PWM)
• Six high-voltage/wake-up inputs (L5.0)
• Three low-voltage GPIOs (PB2.0)
• Low power modes with cyclic-sense and forced wake-up
• Current Sense Module with selectable gain
• Reverse-battery-protected Voltage Sense Module
• Two protected low-side outputs to drive inductive loads
• Two protected high-side outputs
• Chip temperature sensor
• Hall sensor supply
• Integrated voltage regulator(s)
4.2 Caution
1. When working with the kit, always use an isolated laboratory power supply.
2. Keep in mind all ESD rules when handling the board. Avoid touching the connector pins, they are directly
connected to the device pins. Even though the device pins are ESD protected, this protection has its limits.
Some EDS events can destroy or damage the device, or cause its malfunction.

Required Equipment
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4.3 Acronyms
5 Required Equipment
• PC Computer running Windows XP or higher
• 12V Power Supply
• USB Cable (supplied)
6 Setup Guide
6.1 Hardware Setup
Setup and connections for the KIT912F634EVME are straightforward.
The KIT912F634EVME requires a connection to the power supply and a connection to the PC or notebook via
the USB cable. Figure 2 depicts a complete setup.
Follow these steps to set up the board:
1. Plug the USB cable into the connector J101 and connect the other end of the cable to the PC or notebook.
2. A basic jumper configuration is required to be able to use the KIT912F634EVME. See Table 2 for details.
Table 3 provides a complete index of jumper settings.
3. Connect a laboratory power supply via banana connectors to the board, using J2 (V_S supply) and J3
(GND). Alternatively, the LIN connector can be used for powering the board. The supply voltage has to be
in the range of 8.0 to 18 V. When power is applied to the KIT912F634EVME, the green power-on LEDs D6
(+5.0 V), D7 (supply), and D8 (+2.5 V) are lit when power is present and the corresponding jumpers JP4,
JP8, JP9 are closed.
Table 1. Explanation of Acronyms
Acronym Meaning Acronym Meaning
D2D Die to Die bus
interface
MCU Microcontroller Unit
BDM Background Debug
Module
HS High Side (switch)
EVB Evaluation Board LED Light Emitting Diode
EVM Evaluation Module LIN Local Interconnect
Network
ESD Electrostatic
Discharge,
Electrostatic Sensitive
Device
LS Low Side (switch)
GND In this document: main
supply ground
PWM Pulse Width
Modulation
GPIO General Purpose
Input/Output
SCI Serial Communication
Interface
GUI Graphical User
Interface
TBDML Turbo BDM Lite
ADC Analog to Digital
Converter

Setup Guide
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Figure 2. KIT912F634EVMEBasic Hardware Setup
Table 2. KIT912F634EVMEJumper Options for Basic Functionality
Jumper Function Connections
JP1 Supplying of the device logic (VDDX regulator) and Hall sensor supply
regulator enabled
closed
Supplying of the device logic (VDDX regulator) and Hall sensor supply
regulator disabled
open
JP2 Supplying of the HS drivers enabled closed
Supplying of the HS drivers disabled open
JP14 BDM signal from TBDML interface enabled closed
BDM signal from TBDML interface disabled, external BDM interface can
be used (connected to J4)
open
JP15 RST signal from TBDML interface enabled closed
RST signal from TBDML interface disabled, external BDM interface can
be used (connected to J4)
open
Power Supply
GND V_SUP
USB
(+12 V)
Optional
LIN Connector
Power

Hardware Description
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7 Hardware Description
7.1 Board Description
Figure 3 is a snapshot of the EVM with key component and connector locations. The following list corresponds
with the numbers listed on the picture.
1. LEDs to indicate of HS and LS switching
2. Input power connectors
3. Prototype area
4. TBDML interface
5. LIN connector
6. Wake-up button
7. Reset button
8. BDM connector for external programming/debugging BDM interface
9. MM912F634CV1AE
The board is protected against reverse battery voltage by diode D10, which can withstand up to 3.0 A
continuous current. The board operation is straightforward, as is the TDBML interface. (See section “TBDML”
on page 9), the board contains the passive components required for proper operation of the MM912F634.
Connectors provide access to all device pins and test points for important signals.
There are fifteen jumpers on the board. Power to the LEDs is provided through jumpers JP4, JP8, JP10, JP11,
JP12, and JP13. Removing these jumpers allows low power mode current consumption to be demonstrated.
JP6 supplies power to zener diode D11.
Two push buttons are included: SW1 resets the MCU, and SW2 allows wake-up from one of the low power
modes.
A small prototype area allows fast connection of additional components. Key power and ground vias are located
around the prototype area.
The EVM has three different grounds: LIN ground, main supply ground (also referred to as GND), and analog
ground. All grounds are connected together at a single point on the board, located under the MM912F634. The
bottom copper layer of the EVM and copper areas on the top surface are both assigned to GND.
Figure 3. Evaluation Module Board
2
5
1
3
4
6
9
8
7

Hardware Description
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7.1.1 MCU
The MM912F634 is a single package solution that integrates an HCS12 microcontroller with a SMARTMOS™
analog control IC, interfacing via the new high performance Die-to-Die Interface (D2D). The D2D controlled
analog die combines system basis chip and application specific functions, including a Local Interconnect
Network (LIN) transceiver.
The D2D Interface realizes the advantage of a seamless MCU register map, integrating the analog die registers,
while providing faster access than SPI based systems. The HCS12 includes 32 k of flash memory, 2.0 k of RAM,
and a special Die-to-Die Interface, serial peripheral interface (SPI), real time interrupt (RTI), computer operating
properly (COP), and an internal clock generator module. The analog die provides two high side and two low side
outputs with diagnostic functions, voltage regulators for a 5.0 V and 2.5 V MCU supply, window watchdog,
current sense amplifier, four channel timer (TIM), two channel pulse width modulation (PWM) capability, 10 bit
analog to digital converter (ADC), battery voltage sense (VSENSE), and local interconnect network (LIN).
The MM912F634 has three main operating modes: Normal (all functions available); Sleep (VDD off, Wake-up
via LIN, Wake-up inputs (L0-L5), Cyclic Sense, and Forced Wake-up) and Stop (VDD on with limited current
capability, Wake-up via LIN bus, Wake-up inputs (L0-L5), Cyclic Sense, forced Wake-up, and external reset).
7.1.2 TBDML
The Turbo BDM Light interface is a programming and debugging tool, and constitutes an interface between a
PC and the BDM debugging port of Freescale microcontrollers. It enables the debugger and other SW tools to
communicate with the microcontroller, and download code into its on-chip flash, etc. Among the benefits of using
the TBDML on the EVM is a much higher communication speed than other USB/BDM interfaces. It is also not
necessary to connect external devices to the EVM when programming/debugging is needed.
A BDM connector (J4) is placed on the EVM to allow the connection of another BDM tool. In this case, the
jumpers JP14 and JP15 should be removed to disable the TBDML interface.
7.2 Jumper Settings
In Figure 4 is the picture of the EVM with location of all jumpers. Table 3 summarizes the jumper settings.
Figure 4. Position of Jumpers on the EVM
JP11
JP1 JP2
JP3
JP4
JP5
JP6 JP7 JP8
JP9
JP12
JP14
JP13
JP15
JP10

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Table 3. Jumper Setting
Jumper Function Connections
JP1 Supplying of the device logic (VDDX regulator) and hall sensor supply regulator enabled closed
Supplying of the device logic (VDDX regulator) and hall sensor supply regulator disabled open
JP2 Supplying of the HS drivers enabled closed
Supplying of the HS drivers disabled open
JP3 Wake-up pin L0 connected to HS1 output 1-2
Wake-up pin L0 connected to wake-up button SW2 2-3
JP4 VDDX output voltage (+5.0 V) connected to LED D6 closed
VDDX output voltage (+5.0 V) not connected to LED D6 open
JP5 BKGD/MODC pin connected to +5.0 V via a 3.0 k pull-up resistor 1-2
BKGD/MODC pin connected to GND 2-3
JP6 Supply voltage is connected to Zener diode D11 closed
Supply voltage is not connected to zener diode D11 (when the current consumption of the
device in low power modes is demonstrated).
open
JP7 TCLK pin (#44) is connected to 8.0 V (also jumper JP6 has to be inserted and the board has
to be powered at least with 8.0 V) to disable of the watchdog.
1-2
TCLK pin (#44) is connected to GND 2-3
JP8 Supply voltage (+5.0 to 18 V) is connected to LED D8 closed
Supply voltage (+5.0 to 18 V) is not connected to LED D8 open
JP9 VDD output voltage (+2.5 V) is connected to LED D8 closed
VDD output voltage (+2.5 V) is not connected to LED D8 open
JP10 Diode D2 is connected to output HS2 closed
Diode D2 is not connected to output HS2 open
JP11 Diode D1 is connected to output HS1 closed
Diode D1 is not connected to output HS1 open
JP12 Diode D3 is connected to output LS1 closed
Diode D3 is not connected to output LS1 open
JP13 Diode D4 is connected to output LS2 closed
Diode D4 is not connected to output LS2 open
JP14 BDM signal from TBDML interface enabled closed
BDM signal from TBDML interface disabled, external BDM interface can be used (connected
to J4)
open
JP15 RST signal from TBDML interface enabled closed
RST signal from TBDML interface disabled, external BDM interface can be used (connected
to J4)
open

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7.3 Connector Description
There are 10 connectors on the EVM. A list of the connector and pin assignments are in the following
paragraphs. In the following tables, the “Supply voltage” is meant to supply a voltage protected against a reverse
polarity by diode D10.
Figure 5. Connectors
7.3.1 Connectors
Table 4. Connector Designations
Connector Location
LIN Connector J1
Power Connector J2 & J3
BDM Connector J4
Signal Connectors J5, J6, J7 &J8
USB Connector J101
BDM J102
LIN (J1)
Power (J2 & J3)
BDM (J4)
Signal (J5)
Signal (J6)
Signal (J7)
Signal (J8)
USB (J101)
BDM Programming (J102)

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7.3.2 LIN Connector J1
The LIN connector allows a connection to the LIN bus, and provides alternate power to the board. It is a MOLEX
multi-pole connector 39-30-3035 (4.20 mm pitch, right angle), and its mating part is MOLEX 39-01-4030.
7.3.3 Power Connectors J2, J3
Power connectors J2 (positive supply - red) and J3 (ground - black) are sockets for widely used 4.0 mm banana
jacks.
7.3.4 BDM Connector J4
A standard BDM connector (header 2x3, 2.54 mm (0.1”) pitch) is placed on the EVB, to provide the user an
external BDM programming/debugging interface connection. The pin assignment is listed in Table 6.
Table 5. LIN Connector J1
Pin No. Description
1LIN GND
2Supply voltage
3LIN bus
Table 6. BDM Connector
Pin No. Description
1BKGD
2 GND
3 -
4/RESET
5 -
6+5.0 V

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7.3.5 Signal Connector J5
Connector J5 is the header type 3x2, 2.54 mm (0.1”) pitch. Table 7 shows the pin assignments.
7.3.6 Signal Connector J6
The connector type is header 2x5 pins, 2.54 mm pitch. Pin assignment is listed in Table 8.
Table 7. Signal Connector J5
Pin No. Description
1HS1 output
2HS2 output
3 GND
4LS1 output
5LS2 output
6Supply voltage
Table 8. Signal Connector J6
Pin No. Description
1HS1 output
2Wake-up/analog input L0
3Wake-up/analog input L1
4Wake-up/analog input L2
5Wake-up/analog input L3
6Wake-up/analog input L4
7Wake-up/analog input L5
8Supply voltage
9 GND
10 Analog ground

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7.3.7 Signal Connector J7
Signal connector J7 contains the ports PTA and PTB, and the output of the Hall sensor supply regulator. Supply
voltage, VDDX regulator output (+5.0 V), analog and main supply ground are connected as well. Physically, the
connector J7 has 2 rows of pins, with 0.1” pitch.
7.3.8 Signal Connector J8
The J8 connector is header type 2x2, 0.1” (2.54 mm) pitch.
Table 9. Signal Connector J7
Pin No. Description
1Hall sensor supply regulator output
2 GND
3PA0
4PA1
5PA2
6PA3
7PA4
8PA5
9PTB1
10 Analog ground
11 PTB2
12 Supply voltage
13 VDDX (+5V)
14 GND
15 PTB0
16 PTB1
17 PTB2
18 Analog ground
Table 10. Signal Connector J8
Pin No. Description
1ISENSE low
2Analog ground
3ISENSE high
4Analog ground

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7.3.9 USB Connector J101
Connector J101 is a standard USB connector type B. It enables connection of the EVM to a PC or notebook.
7.3.10 TBDML Programming Connector J102
Connector J102 enables programming of the TBDML firmware in EVM production.
7.4 Test Points
27 test points are on the EVM. The schematic is marked with reference numbers, as well as signal names. The
board is only marked with signal names. The following Table 12 summarizes the test points.
Table 11. USB Connector J9
Pin No. Description
1+5.0 V
2USBDM
3USBDP
4 GND
Table 12. Test Points
Reference
designator Signal name Reference designator Signal name
TP1 HS1 TP14 V_SUPP
TP2 HS2 TP15 +5.0 V (VDDX out)
TP3 LS1 TP16 LIN
TP4 LS2 TP18 AD0
TP5 ISENSE_H TP19 AD1
TP6 ISENSE_L TP20 AD2
TP7 Hall SUP TP21 2.5 V (VDD out)
TP8 L0 TP22 +5.0 V (VDDX out)
TP9 L1 TP23 GND
TP10 L2 TP24 AN_GND
TP11 L3 TP25 GND
TP12 L4 TP26 GND
TP13 L5 TP27 GND

Software Description
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8 Software Description
8.1 Software Setup
The KIT912F634EVME is designed to communicate with the PC or notebook (as the master) via the USB
interface. The communication is bidirectional. The orders are sent from master, and the status information is
sent from the slave (kit) to the master. The communication methods are described in Figure 6. In order to enable
this communication, specific software has to be installed on the PC.
Figure 6. Communication Between the PC and the Target
The FreeMASTER software which enables communication with the EVM must be installed on a PC. More
information about this software can be found in the section “FreeMASTER Graphical User Interface” on page
18.
8.1.1 FreeMASTER Software Installation
Before running the application, it is necessary to install the FreeMASTER software included in the jump start
download. See section “Jump Start” on page 3.
System Requirements - PC Side
• Computer: 486DX/66 MHz or higher processor
• Operating system: Microsoft Windows XP, Windows 2000, WindowsNT4 with SP6, Windows 98
• Required software: Internet Explorer 4.0 or higher. For selected features (e.g. regular expression-based
parsing), Internet Explorer 5.5 or higher is required
• Hard drive space: 8.0 MB
Since the control page requires large data transfer (especially to display the analog values in real time), it is
advisable to use a computer with a more powerful processor.
After executing the following file “FreeMASTER.exe”, the FreeMASTER application will install on the computer.
Follow the instructions for successful installation.
912F634
EVM Board
TBDML
interface BDM
J101
USB
PC with
FreeMASTER
software
912F634
EVM Board
TBDML
interface BDM
J101
USB
PC with
FreeMASTER
software

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8.1.2 FreeMASTER Software Setup
After the application installation, the program is ready for use. To run the program, double click on the
MM912F634_master.pmp file. This file already contains all necessary settings. Ensure that the folder \src is
placed in the same directory as the MM912F634_master.pmp file. The \src folder holds the HTML control
page, java script file and the binary file with the information on the project variables.
NOTE: In order to run FreeMASTER with the MM912F634, the correct firmware must first be compiled and
uploaded in the MM912F634 flash memory. The appropriate Code Warrior project is named
912F634_stationary.mcp and is located in the \EMBSW folder. It is necessary to first install Code Warrior
before this file can be located and opened.
8.2 Important Notes on Programming and Debugging of the Board
8.2.1 Hardware Considerations
There is a software watchdog on the analog die of the device. The watchdog must be cleared by software,
writing certain values into the WDSR register (watchdog service register). Read more about the watchdog in the
MM912F634 data sheet. During device programming, the watchdog must be disabled, otherwise the
programming will not run successfully. To disable the watchdog, a voltage between 7.5 and 10 V has to be
applied on pin #44 (TCLK). This can be done by inserting a jumper on JP6 and JP7 (1-2). The minimum supply
voltage during the programming and debugging is 8.0 V. A zener diode (D11) on the board provides 8.1 V.
8.2.2 Programming and Debugging via the TBDML Interface
A TBDML interface is placed on the kit board for programming/debugging of the board. It is necessary to install
TBDML supporting files (USB driver, interface DLL, and the GDI DLL plug-in for the Freescale’s HI-WAVE
debugger) and implement modifications in the settings of the CodeWarrior HI-WAVE debugger, in order to be
able to program/debug the board. The Jump Start download (described on page 3) includes the documentation
and complete source files for this open source tool. Read the user’s manual “tbdml_manual_15.pdf”, especially
the “3.2 Installing Windows Drivers” section, and follow the listed instructions. Omit the jumper J2 settings. It
refers to another board. Installation is easy and does not require any special skills.
8.2.3 Programming and Debugging via BDM Interface
Depending on your version of Windows, the TBDML interface may not be compatible. The BDM interface should
be used through the BDM connector’s J4. Open JP14 (BDM signal) and JP15 (RST signal) to use the BDM
interface.

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8.3 FreeMASTER Graphical User Interface
The installation, application setup, and operating instructions were discussed in previous paragraphs. This
section describes the software functionality.
8.3.1 About the FreeMASTER Software
FreeMASTER software (formerly known as PC Master software) is an off board driver supporting
communication between the MM912F634 microcontroller and a PC. This tool allows the programmer to
remotely control an application in a user-friendly graphical environment, running on a PC. It also provides the
ability to view real-time application variables in both text and graphic form. FreeMASTER software is a versatile
tool used for multipurpose algorithms and applications. It provides smart features, including:
• View board application variables - either in the original format, or transformed into a more easily viewable
format
• Modify variable values (in the original or transformed format) to control the board application
• Plot read variable value changes using the Scope feature
• Plot fast events using the Recorder feature
• Control the target application using application commands
• Add HTML pages providing help, or descriptions for the target board application features, scopes and
recorders, application control, etc.
• Create a logical tree structure of blocks relating to the various board application functions, and assign their
corresponding description pages
• Scope and recorder definitions, and watch grids
• Add an HTML based Control page that can control the board application, using standard web tools.
• More about this tool can be found in application note AN2395 (See ”References” section).
8.3.2 FreeMASTER Software on the Embedded Side
8.3.2.1 General Outline
The default communication interface between the PC and the target microcontroller is the SCI (UART). Beside
this, several communication plug-ins were created and added to the FreeMASTER application:
• JTAG/EOnCE (56F8xxx only)
• BDM (HCS08, HCS12 only)
• OSBDML (HC08, HCS12 only), included TBDML
• CAN Calibration Protocol
• Ethernet, TCP/IP
In order to communicate over the SCI, the FreeMASTER software driver must be included in the CodeWarrior
project. It is a set of files that can be downloaded from www.freescale.com for a particular microcontroller family
(8-bit MCU S08, 16-bit MCU S12, 16-bit DSC - MC56F8000, 32-bit ColdFire, 32-bit Power Architecture).
Then in the file freemaster_cfg.h, it is necessary to configure the FreeMASTER serial communication driver.
This is to set the SCI module used (base address of the SCI module used), size of buffer, enable/disable
recorder or scope, mode of operation (interrupt driven or periodic calling), etc.

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8.3.2.2 FreeMASTER with the KIT912F634EVME
Communication between the PC and the embedded application is via the BDM interface. There are several benefits offered by this
solution:
• It is not necessary to add the FreeMASTER source files to the embedded application
• No need to have on-board hardware circuitry for SCI communication over the RS232 interface
• Uses MCU pins dedicated for SCI module to another purpose, or uses the SCI module in the application
(LIN communication).
Of course, there are also some negatives. It is necessary to have BDM multi-link connected all the time to the
board, and the data flow is slower compared to the UART communication. A constraint also occurs during run
or wake-up from low-power modes. Because activity of the BDM affects the core behavior during transition from
reset to normal mode, sometimes the device does not wake-up properly. For this reason, communication is
interrupted by the JavaScript function before the device is put to STOP or SLEEP mode. This feature is
emphasized in other places in this document. See sections dedicated to low power modes.
8.3.3 FreeMASTER Software on the PC
The MM912F634 EVM application uses only two of the FreeMASTER features - reading and writing a value to
the variables on the embedded side. The information on the variable addresses is listed in the binary file
Project.abs stored in the \src directory. It is one of the files generated by CodeWarrior during compilation of the
embedded software project.
8.3.4 Graphical User Interface
Figure 7 is a screen shot of the FreeMASTER PC application, as seen by the user after the opening of the
MM912F634_master.pmp file. It is the start page, where the user can choose an approach to the analog die
registers. The first possibility is “Die Direct Register Access”, and the second is “Analog Die Modules Access”.
Both control pages will be described in the following paragraphs.
Figure 7. FreeMASTER Start Page

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8.3.4.1 Start of the GUI and Troubleshooting (via TBDML)
The MM912F634_master.pmp file contains information regarding communication with the slave, as well as the
information on the variables and the resource files location. By default, the application starts to communicate
with the slave (KIT912F634EVME board) immediately at startup.
• If the slave has no power (USB cable connected, but no supply applied), there is no special error message
displayed. The board will simply not respond to the commands sent from the GUI.
• If the following alert is displayed:
Figure 8. Communication Error Alert
The most likely cause is that the USB cable is not connected, either to the PC or to the KIT908F634EVME board.
Connect the USB cable to the PC and the free end to the KIT board and click “OK”. Then press the “STOP”
button in the FreeMASTER toolbar to restart the communication.
Figure 9. The FreeMASTER Toolbar
If the USB cable is properly connected, the green LED D102 will be blinking.
If the green LED D102 lights permanently, no communication is currently running. To restore communication,
press the “STOP” button in the FreeMASTER toolbar.