Melexis EVB90614 User Manual

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USER MANUAL

MLX90614 Evaluation board

390129061401 Page 1 of 20 User Manual Rev 001 Oct/2006

MLX90614 Single and Dual zone Infra Red

thermometer Evaluation Board

EVB90614

User Manual

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USER MANUAL

MLX90614 Evaluation board

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Table of Contents

1 Introduction ..................................................................................................................... 3

2 Host computer requirements ......................................................................................... 3

3 Installing the software .................................................................................................... 3

4 Getting started with MLX90614 evaluation board ........................................................ 4

4.1 MLX90614 evaluation board overview .................................................................................................................................................4

4.2 Connecting the EVB90614 evaluation board.......................................................................................................................................5

5 Getting started with MLX90614 Configurator ............................................................... 5

5.1 MLX90614 Configurator overview ........................................................................................................................................................5

5.2 Working with MLX90614 Configurator..................................................................................................................................................5

5.3 Configuration of MLX90614 modules ...................................................................................................................................................8

5.4 Manual sending commands................................................................................................................................................................11

5.5 Demonstration of SMBus and PWM temperature measuring ...........................................................................................................12

5.6 Quick customization of MLX90614 thermometers .............................................................................................................................14

5.7 Updating EVB90614 firmware ............................................................................................................................................................16

6 Troubleshooting............................................................................................................ 17

7 Disclaimer...................................................................................................................... 18

APPENDIX A – EVB90614 commands set ......................................................................19

APPENDIX B – EVB90614 schematics............................................................................ 20

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Introduction

The EVB90614 is designed to support MLX90614 infrared thermometer modules. The communication between PC and the evaluation board is accomplished by USB. The Demonstration Kit contains the following items:

1. FS USB demonstration board, pre-programmed with USB

bootloader and demonstration firmware.

2. A standard USB cable for use in communicating with the board.

3. 2 pcs. MLX90614AAA (single zone 5V)

4. 2 pcs. MLX90614BAA (single zone 3V)

5. CD-ROM, containing the USB HID driver and EVB90614 software

The EVB90614 is designed to allow OEMs to configure the MLX 90614 IR thermometer for virtually any application quickly. OEMs can quickly experiment with temperature ranges, optics, etc. to find the best IR configuration to meet the application needs. Once the best configuration is established, low volume OEMs can easily configure IR modules for their own use. For high volume OEMs, Melexis can supply special configured modules, ready to install into the customer’s application. Please contact IR Sales at Melexis for quotations.

The EVB90614 allows engineers to customize the MLX90614 for high accuracy IR measurements in an R&D or Laboratory setting.

Host computer requirements

To communicate with and program the EVB90614 evaluation board, the following hardware and software requirements must be met:

• PC-compatible system

• An available USB port

• CD-ROM drive (for use with the accompanying CD)

• Microsoft Windows 98, Second Edition (98SE), Windows 2000 Desktop or Windows XP

Note1: EVB90614 is HID USB device and will require no drivers on PCs that support HID class USB devices (except Microsoft Windows 98, Second Edition (98SE)). Check www.melexis.com for most recent release of the software.

Installing the software

As an USB device, the demonstration board requires very little effort to install. Most of the work is done by the operating system. The software is installed simply by running the file “setup.exe”. The software will be installed in a separate Melexis directory and can be accessed from Start/Programs/Melexis/ Mlx90614 Configurator.

Note2: If your version of Windows does not support the HID USB devices you might need to install USB driver (check

www.melexis.com

for such driver).

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Getting started with MLX90614 evaluation board

4.1 MLX90614 evaluation board overview

1 2 3 4 5 6 7

Fig.4.1

Top view of evaluation board is shown on Fig.4.1.The main elements include:

1. Extension connector (70553-0003 from www.molex.com) allowing additional

MLX90614 modules to be connected to SMBus.

Connector pin description: pin1 - SCL/Vz (pin 1 is marked on the plastic body of the connector) pin2 - PWM/SDA

pin3 - Vdd

pin4 - Vss

2. ZIF socket for MLX90614

3. Button “next”

4. Button “start”

5. Button “reset”

6. RGB status LED

7. USB "B" Receptacles

The EVB90614 board receives its power supply only from the USB cable (Bus-Powered Device). External power supply source is not needed.

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4.2 Connecting the EVB90614 evaluation board

To connect the evaluation board:

1. Unbox and unwrap the board, and set it on a non-conductive surface near the

host system.

2. Connect the USB cable (supplied in the kit) to an open USB port on the host system or a USB hub connected to the host system, and to the USB connector on the board. The LED will shine in BLUE.

3. EVB90614 evaluation board is HID compliant device so a special USB device driver is not needed (except when using Window 98 & 98SE).

4. Check the board connection. This can be done from Start/Settings/Control Panel/ System/Hardware/Device Manager (Fig.4.2).

Fig.4.2

Getting started with MLX90614 Configurator

5.1 MLX90614 Configurator overview

The MLX90614 Configurator is a Windows-based software application designed to be used with the EVB90614 evaluation board for evaluating Melexis MLX90614 infrared thermometers. Using this software, features and performance of MLX90614 infrared thermometers can be evaluated. All basic configurations of MLX90614 are also supported in user-friendly format. Configuration is written in EEPROM of each MLX90614 and will be the POR default afterwards. This way the MLX90614 can be further used without EVB in target applications.

5.2 Working with MLX90614 Configurator

Insert a MLX90614 thermometer in the ZIF socket (see Fig.4.1). Make sure that module benchmark coincides with the mark on the PCB. The software can be launched from Start/Programs/Melexis/ MLX90614 Configurator.

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The Configurator automatically recognizes the module type, address and voltage supply (Fig.5.1). The status LED is shinning GREEN.

Fig.5.1

If there is no thermometer module inserted on the EVB or the module is not a MLX90614, the user will be notified (Fig.5.2). Click the button OK. The main panel looks as shown in Fig.5.3.

Fig.5.2

Fig.5.3

Note that the buttons Power off and Refresh are alternating. The MLX90614 Configurator gives the opportunity to connect a few MLX90614 modules in a network (Fig.5.4). Note that if in a network both 3V (MLX90614Bxx) and 5V (MLX90614Axx) modules are present, currently only the 3V modules will be available.

Fig.5.4

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Note3: If in a SMBus network there is a module with address zero it will be not reported. A module with SMBus address zero will be reported if it is the only one connected to board. Also modules with the same SMBus addresses connected to the network will cause conflict on the bus when operation reading is done.

Note4: It is strongly recommended to save factory default EEPROM of every new MLX90614 before doing anything else with it (See below how to do that).

Note5: schematics for PCBs to attach multiple modules using connector 1 can be found on page 20.

Main panel description

Turn off module power supply.

Opens “Console Utility” window for manual sending of commands. See Appendix A for commands set.

Opens “Configuration uploader” window for quick replication of MLX90614 infrared modules’ configuration.

Opens “Advanced” window from which user can upgrade EVB firmware, change measuring unit of the temperature scale and relocate the log file.

Opens current EVB90614 User Manual. It is recommended to check

www.melexis.com for updates and related documents.

Opens “Configuration utility” window used for configuring MLX90614 infrared thermometers.

Opens “Measure utility” window for temperature measurements.

Dual zone module identification picture.

Single zone module identification picture.

(Re-)start system to refresh information about the modules.

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5.3 Configuration of MLX90614 modules

From the main panel push the button Config. ”Configuration utility” window is opened (Fig.5.5).

Fig.5.5 Fig.5.6

From this window the user can configure the MLX90614 module. A short description of every setting field follows bellow. For a detailed description of the settings please refer to the MLX90614 datasheet. These settings are stored in MLX90614 EEPROM and will be the power-up default configuration. To max, To min - defines the temperature ranges for object temperature in PWM mode.

Ta max, Ta min - defines temperature ranges for ambient temperature in PWM mode. PWM/SMBus/Relay - chooses between SMBus, PWM and Thermo Relay mode. PWM mode - defines single or extended PWM mode PWM struct - selects what data will be transmitted via the PWM. PWM period - defines the PWM period. A list of available settings as drop-down menu. PWM period repetitions - defines how many times each PWM period will be repeated.

Any even number of repetitions from 0 to 62 is valid. PWM pin configuration - chooses between NMOS “open drain” and “push pull” PWM output. Sensor zone - defines the number IR sensors. This number is factory programmed and is recommended not to be altered. SMBus address - set SMBus slave address. All values between 0 and 127 are valid. All MLX90614 will accept communication with slave address 0. Therefore in SMBus network a slave address 0 will be useless. F.I.R filter- drop-down list of settling time available via embedded in MLX90614 digital filter. Slower settling comes with less noise.

Module type and SMBus slave address identification fields.

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I.I.R filter [%] – drop-down list of available values for impulse limit. 100% passes all impulse, 50% cuts impulse magnitude in half via embedded in MLX90614 IIR filter. Note that the settling time depends on both FIR and IIR filters settings.

Some options are available from the drop-down menu while other must be typed by the user. For example to change the object temperature range double click on To min or To max field and type the new range. To change between PWM and SMBus mode double click on PWM/SMBus/Relay field and select from the drop-down menu the desired option (Fig.5.7).

Fig.5.7

Note that when the Thermo relay option is selected the fields To max and To min change in Hysteresis and Threshold respectively (Fig.5.6). Hysteresis adds to threshold on each side. Trip points will be Threshold+Hysteresis for rising temperature and Threshold+Hysteresis for decreasing temperature.

Tick to view the full EEPROM memory in hexadecimal view (Fig.5.8). Note that only highlighted cells are accessible by the user (see MLX90614 datasheet for more information). All other EEPROM cells contain factory calibration values and are protected against erase and writes.

Fig.5.8

Note 6: Do not write SMBus address 0x00 in any module when you make a sensor network because reading this module will cause all devices on the network to reply. This will result in confusion on the SMBus.

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Click button Read to read the complete EEPROM memory. Starting the SW or clicking “Refresh” after “Power Off” will automatically read the EEPROM, too.

Click button Write to write changed EEPROM cells. Factory calibration values will not be altered. Writing EEPROM cell is automatically preceded by erasure.

Click button Save file to save EEPROM in a bin file. Refer to Fig.5.9. Click button Load file to load a bin file. If the loaded bin file is to be written into MLX90614

EEPROM a “Write” must be clicked afterwards. Refer to Fig.5.10.

Fig.5.9

Fig.5.10

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5.4 Manual sending commands

From the main panel push the button Console. ”Console utility” window is opened (Fig.5.11).

Fig.5.11

Type a valid command in the Command field, push Execute (or button ‘Enter’ on the keyboard). The result will be reflected in the Information field. The supported commands are described in APPENDIX A. The console utility is provided for extended functionality. All read/configure/write as well as measure/log data operations can be done without this utility.

Command field

Information field

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5.5 Demonstration of SMBus and PWM temperature measuring

From the main panel push the button Measure. The ”Measure utility” window is opened (Fig.5.12).

Fig.5.12

Note7: If the used module is single zone only two thermometers will be present on the screen (Fig.5.13).

Fig.5.13

Push the button Start to start temperature measurement. With the MLX90614 configured in PWM mode the PWM output depends on the ranges written in EEPROM. These ranges

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are automatically read and filled in the Min/Max boxes on this screen. An example is shown on Fig.5.14. If the module is configured in SMBus mode no information is displayed in the lower right corner.

Fig.5.14

In the field “Measure period” the user can make the measuring faster or slower. Max and Min fields permit user to change graphic scales.

When the measurement is started data will be acquired in a log.csv file. If the SMBus mode is selected the following RAM registers will be logged in the log.csv file (See MLX90614 datasheet for more information):

 Ambient sensor data - SMBus RAM address=0x03h  IR sensor 1 data - SMBus RAM address= 0x04h  IR sensor 2 data - SMBus RAM address= 0x05h  Linearized ambient temperature Ta - SMBus RAM address =0x06h Linearized object temperature (IR1) T

OBJ1

- SMBus RAM address= 0x07h

Linearized object temperature (IR2) T

OBJ2 -

SMBus RAM address = 0x08h If PWM mode is selected logged data will depend on the chosen PWM structure. Every time a measurement is started the log file is continued, with the entire EEPROM

saved as new heading row.

Note8: In Regional and Language Options (available from Start/Settings/Control panel) list separator need to be “,” and decimal symbol – “.” in order to get the CSV log file opened in an easy to use form in EXCEL.

Note9: Note that the CSV log file is the same for all measurements, there is not a separate file for every module that is measured.

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To change the temperature measuring unit (C, F or K) and to relocate the log.csv file:

1. Click the button Advanced from main panel

2. Click the button Option available in “Advanced” window.

3. From “Software settings” window choose the desired settings (Fig.5.15).

Fig.5.15

5.6 Quick customization of MLX90614 thermometers

Push the button Uploader on the main panel. The “Configuration uploader” window is opened (Fig.5.16). This window is very similar to “Configuration utility” window but here the user cannot change the EEPROM. Click the button “Select EEPROM” to open the window “Open EEPROM file” (See Fig.5.10). Browse to select the desired EEPROM configuration file and click the button

“Open”. The chosen EEPROM configuration is loaded (Fig.5.17). Tick to view the full EEPROM memory in hexadecimal view if desired.

Fig.5.16 Fig.5.17

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The user has two choices to load an EEPROM configuration in a MLX90614 module:

 Upload  Quick upload

When the Upload button is pushed the software automatically checks the module power supply before writing the EEPROM memory of the module. This process takes some time. This option is useful when the user wants to configure MLX90614 modules of different versions. It is recommended to use this option as it provides additional safety (a 3V module would not be subjected to overvoltage stress unintentionally).

When long series of MLX90614 modules need to be configured with the same configuration the Quick upload option might be preferred. In this case the user must initially choose the module voltage supply manually in the field below the button Quick upload (See Fig.5.15 or Fig.5.16) and push the button Quick upload. In this case the software does not make module power supply verification so the time of module configuration is reduced.

Note that in both cases the users cannot enter the SMBus device address. And indeed this is not necessary because the software automatically uses address 0x00 which is universal address for all MLX90614 devices. The users must realize also that when using the “Configuration uploader” window only one MLX90614 device should be present or all devices in the network are changed. If you work in a network and want to change the configuration of a specific module in the network use ”Configuration utility” window ( see

5.3 Configuration of MLX90614 modules).

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5.7 Updating EVB90614 firmware

For possible future upgrades of the EVB FW a bootloader is programmed into the EVB MCU. This makes possible for the user to load updates into the EVB using the same software.

This can be done by two ways:

Updating EVB90614 firmware – method 1

1. Start MLX90614 Configurator

2. Push the button Advanced from the main panel. “Advanced” window is opened (Fig.5.18).

Fig.5.18

3. Push the button Upload HEX. A warning message appears (Fig.5.19).

Fig.5.19

4. Click Yes and in a new browse window to find the firmware file will appear, select the correct file and click button Open (Fig.5.20).

Fig.5.20

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Wait until a message box appears (Fig.5.21).

Fig.5.21 Close this window. The EVB90614 board is updated and ready for work. If an incompatible file is loaded warning messages will appear. Follow these messages to load a compatible file.

Updating EVB90614 firmware – method 2

1. Close MLX90614 Configurator

2. Press and hold the button start on the board

3. Press and release the button reset on the board

4. Release the button start After these steps the board is manually entered in bootloader mode. The LED is turned off.

5. Start MLX90614 Configurator. The following message appears (Fig.5.22).

Fig.5.22

6. Click OK and follow step 4 in method 1

6 Troubleshooting

If the USB communication with EVB90614 fails or the MLX90614 Configurator hangs, close the program, push the button reset on the board (the LED must shines BLUE) and launch the program again.

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7 Disclaimer

Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application. The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis’ rendering of technical or other services. © 2006 Melexis NV. All rights reserved.

For the latest version of this document, go to our website at

www.melexis.com

Or for additional information contact Melexis Direct:

Europe, Africa, Asia: America:

Phone: +32 1367 0495 Phone: +1 603 223 2362

E-mail: sales_europe@melexis.com E-mail: sales_usa@melexis.com

ISO/TS 16949 and ISO14001 Certified

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APPENDIX A – EVB90614 commands set

1. Read MLX90614 RAM address Syntax: rr address Operands: 0(0x0)  address 31(0x1F)

2. Read MLX90614 EEPROM address Syntax: re address Operands: 0(0x0)  address 31(0x1F)

3. Write MLX90614 EEPROM address Syntax: we address value Operands: 0(0x0)  address 31(0x1F) 0(0x0)  value 65535(0xFFFF)

4. Restart MLX90614 (turn off-turn on module power supply) Syntax: rt Operands: no operands

5. Send Request (switch to SMBus mode) Syntax: rq Operands: no operands

6. Capture PWM Syntax: cp

Operands: no operands

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 APPENDIX B – EVB90614 schematics Note that the components marked “Optional” are not populated. They are assumed to give

the user the option to develop his own applications with the board.

SCL

U5LP298 0-AD J

3 4

GND

On/OFF

ADJ

Out

optional

USB_D +

R260s

R6 1,5ks

P12 302SCT1

NFM21 PC105

Vdd

P12 302SCT2

R22

1ks

LM29 31

123

Out

GND

CN1

USB-B

1 2 3 4

5 6

5V DD+

GND

. .

C15 1,0s

C19

22/10TBs

optional

R19

1,8ks

TP5

PWM/SDA

1ks

optional

R20

47*s

10ns

R18

2,2ks

22ps

R11

1ks

R2810ks

optional

PESD5V0L5UY

J3WM4902-ND

123

SCL/Vz

PWM/SDA

Vdd

Vss

R23

820s

M3mm

TP3 Vss

optional

R32

1ks

SCL

C21

22/10TBs

P12 294SCT1

4 3

2 1

J2Optional

12345

Vsup

Vdd

RA3

RA2

RA1

RB4

R24

1ks

M3mm

R418ks

1ks

TP4

SCL/Vz

optional

TP1 Tx

C18

22/10TBs

ML X9 061 4

SCL

PWM

Vdd

Vss

C10

22ns

R15

33ks

4V8

optional

C3 22/10TBs

(LT C1694IS5)s

213

SMB2

GND

Vcc

SMB1

1ks

C28

0,1s

C11 22ps

SN74LVC2G14DBVR

R31

1ks

1,0s

C7 0,1s

R25

4k7s

optional

C12

22ps

22/10TBs

USB_D -

R2710ks

TP2 Rx

C16

22/10TBs

R5 1,5ks

JP1

SMD

optional

Vdd

C17

0,22s

20MHz

PIC18F4550

1213141516

2221201918

3435363738394041424344

RC7/Rx

RD4

RD5/P1B

RD6/P1C

RD7/P1D

Vss

Vdd

RB0/IN T0/SDA

RB1/INT1/SC L

RB2/INT2

RB3/CC P2'

ICCK"

ICDT "

RB4/KBI0

RB5/KBI1/PGM

RB6/KBI2/PGC

RC0/T1OSO

OSC2/CLKO/RA 6

OSC1/CLKI

Vss

Vdd

RE2/AN7

RE1/AN6

RE0/AN5

RA5/AN4/-SS/H LVDIN

RA4/T0CKI

RA3/AN3/Vref +

RA2/AN2/Vref -

RA1/AN1

RA0/AN0

-MCLR/ Vpp/RE3

RB7/KBI3/PGD

CRST"

ICPORTS "

RC1/T 1OSI/CCP2'

RC2/CC P1/P1A

Vusb

RD0

RD1

RD2

RD3

RC4/D-

RC5/D+

RC6/T x

R21

2ks

optional

R43

33ks

R29

1ks

PWM

R10

1ks

R218ks

M3mm

optional

R17

330ks

C20

22/10TBs

R14

62ks

R16

12ks

C13

22ns

R12

33ks

10ns

NDS332P

optional

CN4

UX40_MB_5P

12345

987

SCL/Vz

PWM/SDA

Vdd

Vss

...

CN6

miniUSB

1 2 3 4

7 658 9

5V DD+

GND

. .5. .

TP6 Vdd

M3mm

R13

1ks

NDS332P

optional

33ks

U1325LC640

123

657

-CS

-WP

Vss

SCK

-Hold

Vdd

J4Optional

12345

Vss

RD0

RD1

RD2

RD3

RD4

R42

33ks

J1ICSP

12345

Vss

Vdd

Vpp

PGD

PGC

(Vss)

optional

PWM

Alternative

R33

FB1 600Z

C14

1,0s

optional

R30

1ks

22ns

LED1

LM1-TPP1-01

R3 0s

R41