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EVB90129 mlx90129 evaluation board 390129012901 page 1 of 13 evaluation board rev 003 june-2010 features and benefits versatile a/d interface for resistive sensors iso15693 13.56mhz transponder slave / master spi interface 4 k-bit eeprom with access protection standalone data-logging mode ultra low power battery or battery-less applications low cost and compact design application example asset management and monitoring (security and integrity) building automation supply chain monitoring of temperature and other parameters industrial, medical and residential control ordering information part no. EVB90129 general description the EVB90129 is an assembled printed circuit board that simplifies evaluation of the mlx90129 sensor tag ic and to facilitate the development of wireless sensor appli cations based on the mlx90129. the EVB90129 was developed to demonstrate a wide range of applications, from fully passive sensor ta g operation to complex data logging. each of its elem ents can be reconfigured by means of jumpers. the board can be powered either by an external volt age supply, the on-board battery or the electromagnetic field from a rfid reader. in addition to the internal temperature sensor of t he mlx90129, the EVB90129 embeds 3 external sensors, light, temperature and potentiometer to demonstrate the flexibility for measurement of a variety of physica l quantities. the custom prototyping area allows user s to integrate their own sensor or circuit into this eva luation board. the EVB90129 is capable of storing 128 kbit of data 's in the spi eeprom memory connected to the mlx90129. the EVB90129 can be accessed and controlled through a contactless (rfid) or a contact (spi) interface. th e rfid access to the mlx90129 and the related commands are compliant with the iso15693 standard. the spi and o ther digital inputs/outputs from the mlx90129 are connec ted to an 8-pin connector of the EVB90129. this allows eas y connection to a microcontroller.
EVB90129 mlx90129 evaluation board 390129012901 page 2 of 13 evaluation board rev 003 june-2010 table of contents 1 EVB90129 global description ...................... ................................................... ....................3 2 EVB90129 power supplies.......................... ................................................... .........................5 3 EVB90129 communication........................... ................................................... .........................5 3.1 e xternal spi connector ................................................... ................................................... .....................5 3.2 s lave s elect selector ................................................... ................................................... ........................6 3.3 rfid antenna ................................................... ................................................... ........................................7 3.4 r egister c onfiguration ................................................... ................................................... ......................7 4 sensor description ............................... ................................................... .............................8 4.1 i nternal temperature sensor ................................................... ................................................... .............8 4.2 l ight sensor ................................................... ................................................... .........................................8 4.3 e xternal temperature sensor ................................................... ................................................... ............9 4.4 p otentiometer sensor ................................................... ................................................... .........................9 5 miscellaneous peripheries ........................ ................................................... ...................10 5.1 p adlock or security device function ................................................... ..................................................1 0 5.2 e xternal spi memory ................................................... ................................................... .........................10 5.3 e xternal xtal............................................... ................................................... ........................................10 5.4 t est points and patch area ................................................... ................................................... ................11 6 using the EVB90129 ............................... ................................................... ..............................11 7 schematic ........................................ ................................................... .....................................11 8 list of components............................... ................................................... ............................12 9 disclaimer ....................................... ................................................... .....................................13
EVB90129 mlx90129 evaluation board 390129012901 page 3 of 13 evaluation board rev 003 june-2010 1 EVB90129 global description the EVB90129 simplifies evaluating all the features of the mlx90129. the following application can be executed on the EVB90129: ? sensor control via spi (application with a microco ntroller) ? passive sensor tag (sensor control via rfid withou t battery) ? automatic data logging of the three sensors values logged to the external memory ? automatic data logging of the three sensors values logged to the mlx90129 memory ? external memory access via rfid ? padlock or security device function (antitheft sys tem) EVB90129 provides three ways to supply the mlx90129 . a battery, an external voltage or the electromagn etic field can be used. there are two communication channels to communicate with mlx90129: spi and rfid. the spi signals are available through the spi connector and the rfid an tenna has been tuned to match with the mlx90129 internal capacitance. EVB90129 provides four sensors: the mlx90129 intern al temperature sensor and three external sensors. t he three external sensors are composed of a light sens or, an external temperature sensor and one potentio meter. another sensor can be connected to the mlx90129 usi ng the prototyping development area included on the evb. to store a large amount of data during data logging application, an external spi memory is available. the following diagram describes the principles of t he EVB90129 and the following pictures describe the hardware blocks.
EVB90129 mlx90129 evaluation board 390129012901 page 4 of 13 evaluation board rev 003 june-2010 EVB90129 top ? hardware block description EVB90129 bottom ? hardware block description
EVB90129 mlx90129 evaluation board 390129012901 page 5 of 13 evaluation board rev 003 june-2010 2 EVB90129 power supplies the EVB90129 allows supplying the mlx90129 through three ways. power supply can be provided by a battery cr2 032, by an external power supply input or a by an electroma gnetic field from a rfid reader. the jumper con2/ vdd_sele ctor allow selecting the regulated source of power. this source is filtered by l1 and c5. c3 is not mounted. the energ y from an applied electromagnetic field is collected with the 13.56mhz tuned antenna through the pin coil1 and coil2. a ze ner diode on the vfield pin ensures the compliance with the maximum electrical rating defined in the mlx90129 datasheet. indeed, very powerful reader could provi de enough energy to exceed this rating. the 100 nf cap acitor c2 on vfield pin allows storing of this energy in o rder to supply the mlx90129 and the external sensor in sens or tag application. the following drawings show how to set jumpers in o rder to select the power supply source external power supply battery powered electromagnet ic field powered vdd_jumper depending on the mode used, care should be taken ab out the internal mlx90129 switches for power management. please read the datasheet for more info rmation on this topic. 3 EVB90129 communication the EVB90129 allows communication with the mlx90129 through spi and rfid and also between the mlx90129 and an external memory during a data loggi ng application. the spi signals are received throu gh the spi connector and the ss_selector allows select ing the communication channel. rfid signals are received through the rfid antenna connected to the mlx90129. 3.1 external spi connector the digital inputs/outputs of the spi bus and the i rq pin of the mlx90129 are available on the connector con1/con_spi. in addition the external spi connecto r provides pins to supply EVB90129 (vdd_spi and gnd), and a connection to the voltage regulated output vreg. the following table, schematic and diagram give information about the spi connector. p er default, the resistor r14 is not mounted. 1 2 3 4 5 6 7 8 con1 con_spi ss_mcu vdd_spi miso mosi sck irq_29 vreg gnd r14 0r vdd_spi vdd_bat c5 100n gnd vbat_29 l1 z600 1 2 3 con2 vdd_selector c2 100n gnd d1 bzv55/c4v7 vfield_29
EVB90129 mlx90129 evaluation board 390129012901 page 6 of 13 evaluation board rev 003 june-2010 pin i/o name description 1 output irq_29 interrupt output 2 input ss_mcu slave select signal of the spi bus 3 input vdd_spi external power supply 4 output miso master in slave out of the spi bus 5 in put mosi master out slave in of the spi bus 6 input sck clock of the spi bus 7 input gnd ground of the evb 8 output vreg regulated supply voltage from mlx90129* *not connected per default / r14 not mounted 3.2 slave select selector the con4/ss_selector allows switching between the s everal spi devices on the evb. there are three communication c hannels: ? external mcu as spi-master and mlx90129 as spi-sla ve ? mlx90129 as spi-master and external memory as spi- slave (data logging application) ? external mcu as spi-master and external memory as spi-slave by selecting the connection of the slave selects, t he spi communication channels are switched as shown in the following schematic and draws. external mcu mlx90129 mlx90129 external mem ory external mcuexternal memory board 4 3 2 1 ss selector con4 ss_mem ss_29 ss_jumper board board 4 3 2 1 ss selector con4 ss_mem ss_29 ss_jumper board 1 2 3 4 con4 ss_selector ss_mcu ss_29 ss_mem
EVB90129 mlx90129 evaluation board 390129012901 page 7 of 13 evaluation board rev 003 june-2010 3.3 rfid antenna the evb antenna has been designed to work with a 13 .56mhz electromagnetic field. the antenna can be directly connected to the mlx90129 through pins coi l1 and coil2. the shortcut r1 and r2 allows for disconnecting the antenna and r3 and c1 footprint ( components not mounted) could be used to match mlx90129 with another antenna. the following schem atic and drawing show the antenna connection and th e antenna shape: r2 0r r3 1k r1 0r c1 47p coil1 coil2 rectangular pcb antenna : 2820 x 2020 mils wire = 30 mils / space = 15 mils / three tunrs l = 1.838 uh tp1 tp2 /!\ r3 and c1 are not mounted 120 mil 304 mm 30 mil 76 mm 15 mil 38 mm bottom view for information: 1 mil = 2.54e-3 cm 3.4 register configuration there are a lot of possible configurations for enab ling communication features. for example spi or rfi d access can be disabled and eeprom area or register file access can be restricted. the following configuration puts the mlx90129 in a security free mode. the device is fully accessible by rfid and sp i. more information is available in the mlx90129 datas heet. content # hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 eeprom security 04 aaa8 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 device security 05 3ff0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0
EVB90129 mlx90129 evaluation board 390129012901 page 8 of 13 evaluation board rev 003 june-2010 4 sensor description EVB90129 is delivered with three external sensors i n addition to the internal temperature sensor of th e mlx90129; a light sensor, an external temperature s ensor and a potentiometer. for each sensor, the schematic and a configuration of the mlx90129 regis ter is provided. the sensors are provided as exampl es and have not been calibrated. the configuration pro vided is basic, there is no amplification (per defa ult gain=8), no threshold, and no offset with the dac. the adc mode is ?11?, the initialization time is mi nimal and there is no averaging so the chopper is disabled. t he datalogging control bits (b4, b5, b6) of the ?co ntrol word? are set. the mlx90129 datasheet provides more detai ls about the register configuration. the basic following configuration for sensor condit ioning can be used for all sensors. content # hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 sensor power 12 00ff 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 sensor trimming 14 0 tt 0 0 0 0 0 0 0 t t t t 0 0 0 0 0 0 ? t ? means melexis trimming bits. do not change. 4.1 internal temperature sensor the specifications of the internal temperature sens or are available in the mlx90129 datasheet. the fol lowing register configuration allows monitoring the full r ange of the internal temperature sensor. content # hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 control word 15 c070 1 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 low threshold 16 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 high threshold 17 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 conditioner config. 18 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 connection config. 19 0231 0 0 0 0 0 0 1 0 0 0 1 1 0 0 0 1 resistance network 1a 8000 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4.2 light sensor the light sensor is a phototransistor for ambient l ight sensor measurement. to use, it, all the jumpers of the con 6/ light_selector have to be set in order to connect m lx90129 pins senssup2, sens1 and sens2 to the sensor. the schematic shows the sensor implementation and t he following register configuration allows monitoring the ambien t light on the phototransistor through the mlx90129. this sensor fits mainly for the sun light monitorin g. the output voltage with flashlight is very low. content # hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 control word 15 c070 1 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 low threshold 16 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 high threshold 17 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 conditioner config. 18 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 connection config. 19 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 resistance network 1a 0002 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 2 1 q1 tept5700 1 2 3 4 5 6 con6 light_selector senssup2 sens1 sens2 r7 0r gnd r6 100r
EVB90129 mlx90129 evaluation board 390129012901 page 9 of 13 evaluation board rev 003 june-2010 4.3 external temperature sensor the external temperature sensor is a thermistor of 1kohm with an operating temperature range from -40 to +125 degrees celsius. the output voltage monitored by sens 3 corresponds to senssup1 divided per 2 plus the variation of the sensor. this voltage will be c ompared with vcm (senssup1 divided by 2) value internally o f the mlx90129. the datasheet gives more information about this setup. to be used, all the jumpers of th e con7/ temp_selector have to be set in order to connect mlx90129 pins senssup1 and sens3 to the sensor. the schematic shows the sensor implementati on and the following register configuration allows mon itoring the ambient temperature through the mlx90129. content # hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 control word 15 c070 1 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 low threshold 16 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 high threshold 17 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 conditioner config. 18 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 connection config. 19 0123 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 resistance network 1a 0040 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 4.4 potentiometer sensor the external trimmer is a 100 ohm variable resistor . the output voltage monitored by sens 4 corresponds to senssup1 divided per 2 plus the variation of the se nsor. this voltage will be compared with vcm (senssup1 divided by 2) value internally of the mlx90129. the datasheet gives more information about this setup. to be used, all the jumpers of the con8/ trim_selector have to be set in order to connect mlx90129 pins senssup1 and sens4 to the sensor. the schematic shows the sensor implementation and t he following register configuration allows monitoring the variation of trimmer resistivity through the mlx901 29. content # hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 control word 15 c070 1 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 low threshold 16 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 high threshold 17 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 conditioner config. 18 0000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 connection config. 19 0069 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 resistance network 1a 0040 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 t r12 1k r8 10k r9 10k gnd 1 2 3 4 con7 temp_selector senssup1 sens3 r10 10k r11 10k gnd senssup1 2 1 3 r13 100r 1 2 3 4 con8 trim_selector sens4
EVB90129 mlx90129 evaluation board 390129012901 page 10 of 13 evaluation board rev 003 june-2010 5 miscellaneous peripheries 5.1 padlock or security device function the pin 7 of the mlx90129 can be used as a padlock function, else it has to be connected to the ground . the padlock function allows generating an irq when the jumper between pin 7 and the ground is removed. the schematic shows the padlock jumper implementati on and the following register configuration allows con figuring the mlx90129 in order to use this feature. content # hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 power configuration 12 0a00 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 5.2 external spi memory the mlx90129 can be connected to a spi external memory in order to store a large amount of data dur ing a data logging application. an external 128kbit memor y is available on the EVB90129. it can be connected by setting the jumper con3 / extmemselector. in this configuration, the external memory is supplied by t he regulated voltage output (vreg) of the mlx90129. th e spi pins (ss / sck / miso /mosi) are connected to t he mlx90129 spi pins. the con4 / ss_selector allows connecting the ss pin of the mlx90129 to the ss pin of the external memory. the schematic shows the memory implementation and the following register configura tion allows the mlx90129 to communicate with the memory as a spi master. more information is available in t he mlx90129 datasheet. the spi memory datasheet gives the following commands: - write enable = 0x06 - write memory = 0x02 - read memory = 0x03 the mlx90129 has to be in spi master mode. the bit 0 of the device security register has to be set eit her in eeprom (restricted access by rfid) or in the regist er files. content # hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 control word 0d 0639 0 0 0 0 0 1 1 0 0 0 1 1 1 0 0 1 command codes 0e 0203 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 device security 05 3ff1 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 1 5.3 external xtal for auto logging function an external precise clock can be used to enhance timing between two sensor acquisitions. the 32,768 khz crystal is connected between the pins xin and xout of the mlx90129. the bit 14 of the internal devices domain, address #03 has to be set. nc 7 gnd 1 2 con13 pad lock tp3 black xin xout 1 4 y1 32k768 1 2 con3 ext mem selector vss 4 w 3 q 2 d 5 vcc 8 c 6 s 1 hold 7 u2 cat25128 gnd sck miso ss_mem mosi vreg c7 100n gnd close to pin vcc r4 100k
EVB90129 mlx90129 evaluation board 390129012901 page 11 of 13 evaluation board rev 003 june-2010 5.4 test points and patch area some analogue outputs are foreseen on the evaluatio n board as test pins referenced from tp1 to tp4 . these test pins can be used to monitor signals. in order to connect other sensors to the mlx90129, a patch a rea is available. the following table describes all test p ins available and the following schematic shows the signals available on the patch area. test pins number name description tp1 coil1 coil 1 pin tp2 coil2 coil 2 pin tp3 nc not used tp4 gnd ground 6 using the EVB90129 the EVB90129 can be configured and controlled throu gh its rfid and its spi interface. please refer to the mlx90129 datasheet and the application notes for in formation about register configuration and command description. a bad configuration can lock the mlx90 129 communication completely. care should be taken about the command sent and the configuration applie d. in order to avoid bad manipulation and to speed up the development, the mlx90129 development kit is availa ble (dvk90129). it contains the EVB90129, a usb rfi d reader and user friendly software interface. please refer to our website (www.melexis.com) for more information. 7 schematic schematic of the mlx90129 evaluation board: senssup1 senssup2 sens1 sens2 sens3 sens4 vreg gnd 1 2 3 4 5 6 7 8 con5 patch area
EVB90129 mlx90129 evaluation board 390129012901 page 12 of 13 evaluation board rev 003 june-2010 8 list of components the table below gives an overview of all components that compose the evaluation board EVB90129. reference value description bt1 - battery holder 1 x cr2032 bt2 3v battery cr2032 c1* - capacitor c2 100nf capacitor multilayer ceramic x7r 50v c3* 4u7 f capacitor tantalum 4.7uf; 16v; c5 100nf capacitor multilayer ceramic x7r 50v c7 100nf capacitor multilayer ceramic x7r 50v con1 con_spi header, 2x4 pins, pitch 2.54mm, male, straight con2 vdd_selector header, 1x3 pins, pitch 2.54mm, m ale, straight con3 ext mem selector header, 1x2 pins, pitch 2.54m m, male, straight con4 ss_selector header, 2x2 pins, pitch 2.54mm, ma le, straight con6 light_selector header, 2x3 pins, pitch 2.54mm, male, straight con7 temp_selector header, 2x2 pins, pitch 2.54mm, male, straight con8 trim_selector header, 2x2 pins, pitch 2.54mm, male, straight con13 pad lock header, 1x2 pins, pitch 2.54mm, male , straight dut mlx90129 mlx90129, soldered, tssop20 d1 4.7v zener diode l1 z600 ferrite bead 1206; z=600ohm/100mhz; current =200ma q1 tept5700 phototransistor, sensor, ambient light r1 0r resistor thick film; 0r; 0805; 0.125w; 1%; 15 0v r2 0r resistor thick film; 0r; 0805; 0.125w; 1%; 15 0v r3* - resistor r4 100k resistor thick film; 100k; 0805; 0.125w; 1% ; 150v r6 100r resistor thick film; 100r; 0805; 0.125w; 1% ; 150v r7 0r resistor thick film; 0r; 0805; 0.125w; 1%; 15 0v r8 10k resistor thick film; 10k; 0805; 0.125w; 1%; 150v r9 10k resistor thick film; 10k; 0805; 0.125w; 1%; 150v r10 10k resistor thick film; 10k; 0805; 0.125w; 1%; 150v r11 10k resistor thick film; 10k; 0805; 0.125w; 1%; 150v r12 1k thermistor; 1k, 0805, 0.1w, 5%, 50v, tcr=300 0ppm/degc r13 100r potentiometer; 100r, 0.5w, 10%, 300vdc, tu rns=1 r14* 0r resistor r15* 1m resistor tp1 black test terminal, black; head=1.3mm tp2 black test terminal, black; head=1.3mm tp3 black test terminal, black; head=1.3mm tp4 black test terminal, black; head=1.3mm u2 m95128-wmn6p 128kbit serial spi bus eeprom y1 32k768 quartz crystal md 6.9x1.4x1.3mm; 32.768kh z, 20ppm * components not mounted
EVB90129 mlx90129 evaluation board 390129012901 page 13 of 13 evaluation board rev 003 june-2010 9 disclaimer 1) the information included in this documentation i s subject to melexis intellectual and other propert y rights. reproduction of information is permissible only if the information will not be altered and is accompan ied by all associated conditions, limitations and notices. 2) any use of the documentation without the prior w ritten consent of melexis other than the one set fo rth in clause 1 is an unfair and deceptive business practi ce. melexis is not responsible or liable for such a ltered documentation. 3) the information furnished by melexis in this doc umentation is provided ?as is?. except as expressly warranted in any other applicable license agreement , melexis disclaims all warranties either express, implied, statutory or otherwise including but not l imited to the merchantability, fitness for a partic ular purpose, title and non-infringement with regard to the content of this documentation. 4) notwithstanding the fact that melexis endeavors to take care of the concept and content of this documentation, it may include technical or factual inaccuracies or typographical errors. melexis discl aims any responsibility in connection herewith. 5) melexis reserves the right to change the documen tation, the specifications and prices at any time a nd without notice. therefore, prior to designing this product into a system, it is necessary to check wit h melexis for current information. 6) melexis shall not be liable to recipient or any third party for any damages, including but not limi ted to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, spe cial incidental or consequential damages, of any kind, i n connection with or arising out of the furnishing, performance or use of the information in this docum entation. 7) the product described in this documentation is i ntended for use in normal commercial applications. applications requiring operation beyond ranges spec ified in this documentation, unusual environmental requirements, or high reliability applications, suc h as military, medical life-support or life-sustain ing equipment are specifically not recommended without additional processing by melexis for each application. 8) any supply of products by melexis will be govern ed by the melexis terms of sale, published on www.melexis.com . ? 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 direc t: europe, africa: americas: asia: phone: +32 1367 0495 phone: +1 603 223 2362 phone: +32 1367 0495 e-mail: sales_europe@melexis.com e-mail: sales_usa@melexis.com e-mail: sales_asia@melexis.com

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