Melexis EVB90614 Manuel utilisateur

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

USER MANUAL

MLX90614 Evaluation board

390129061401 Page 2 of 20 User Manual

Rev 001 Oct/2006

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

USER MANUAL

MLX90614 Evaluation board

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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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MLX90614 Evaluation board

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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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