Technical Documentation
Contents
1. sure that all components are free of heavy metals and other harmful substances as required by the RoHS Directive for many industries Hence our products are produced in the most environmentally friendly way possible RoHS lead free 2002 95 EC Technical Documentation metraTec DwarfG2 Mini Page 14 of 16 10 Version History added minor changes Version Changes Changed by 1 0 created 12 02 2015 1 1 Chapters Certification and Further Notes CS 18 06 2015 Technical Documentation metraTec DwarfG2 Mini Page 15 of 16 Contact metraTec GmbH Werner Heisenberg Str 1 D 39106 Magdeburg Germany Tel 49 0 391 251906 00 Fax 49 0 391 251906 01 Email support metratec com Web http www metratec com Copyright 2011 2015 metraTec GmbH Reprint or reproduction of this documentation for other than internal purposes is only allowed with written permission by metraTec GmbH All trademarks are the property of their respective owners All right reserved We are constantly improving our products Changes in function form features can happen without prior notice Technical Documentation metraTec DwarfG2 Mini Page 16 of 162. Dimensions All pads are 1 4 x 1 4 mm Pad positions as in Fig 3 Fig 3 Dimensions and pad positions Technical Documentation metraTec DwarfG2 Mini Page 12 of 16 8 Certification A ATTENTION Changes or modifications to the module not expressly approved by metraTec could void the user s authority to operate the equipment The DwarfG2 Mini UHF SMD Module complies with ETSI Rule EN 302 208 Nonetheless the integrator of the module has to make sure that all requirements are met by the final product It is his obligation to declare product conformity We recommend to assign this task to a qualified third party test lab specialized on EMC measurements Product versions for regulations other than ETSI e g FCC USA or IC Canada are available on request Technical Documentation metraTec DwarfG2 Mini Page 13 of 16 9 Further Notes Electronic devices like the DwarfG2 Mini UHF SMD Module are covered by the German ElektroG electronic waste law as well as the European WEEE directive and as such may not be disposed of by way of the normal household trash Instead they have to be recycled properly For you as our customer this is no additional burden however as you can send the device back to us for proper recycling We assure you that the devices received back will be recycled properly and in an environmentally friendly way Our WEEE Registration ID is DE 56060482 When selecting electronic components we additionally made
3. drate 114 000 115 200 116 500 Databits 8 Parity None Stopbits 1 1 les Vlow 0 3 V 0 0 5 V Vhigh 2 1 V 3 15 V 3 3 V A ATTENTION The UART of the DwarfG2 Mini is not 5 V tolerant If you connect a 5V UART this will most likely destroy the module 5 Others on request Technical Documentation metraTec DwarfG2 Mini Page 7 of 16 5 Pad description Pad Pad Direction Function name Nr GND 1 Pas GND connection use as ground reference for antenna RF 2 Out 50 Ohm RF port connect to RFID antenna use 50 Ohm PCB traces or cable RF signal can be routed to optional onboard U FL connector on request only one port can be used at a time TXD 3 Out 3 3 V UART data output RXD 4 In 3 3 V UART data input GND 5 Pas GND connection use as ground reference for power supply and UART 3V3 6 Pwr In module power supply use a regulated low noise supply to power the module place decoupling capacitors close to the pin The internal reset circuitry monitors the voltage at this pin If the voltage is above 3 08V for 200ms the module is started RFU 7 NC Reserved do not connect GPIO_3 8 I O 3 3V GPIO direction is configurable via FW command internal 50 Ohm series resistor 1mA drive strength GPIO_2 9 I O 3 3V GPIO direction is configurable via FW command internal 50 Ohm series resistor 1mA drive strength GPIO_1 10 I O 3 3V GPIO direction is configurable via FW command inte
4. er Documentation For module firmware protocol descriptions visit Technical Documentation metraTec DwarfG2 Mini Page 3 of 16 Source http www metratec com gt Support gt Downloads gt Documentation Technical Documentation metraTec DwarfG2 Mini Page 4 of 16 2 Features v v v ultra compact UHF RFID Reader module single 3 3 V supply UART interface up to 13 dBm RF output power SMT solderable U FL and wire to board interface optional four 3 3 V GPIOs fully EPC Gen 2 compatible European version according to EN 302 208 Technical Documentation metraTec DwarfG2 Mini Page 5 of 16 3 Electrical Specifications Min Typ Max Supply voltage 3 15 V 3 3 V 3 6 V Supply Current Standby 20 mA Supply Current RF on 150 mA 170 mA 185 mA Max RF output power 11 dBm 12dBm 13dBm Operating Temperature 40 C 2030 195 C Antenna port impedance 50 Ohm Carrier frequency 865 MHz 868 MHz Start up time 185 ms 200 ms 225 ms 1 Power black outs brown outs below minimum voltage will lead to reset of the module 2 RFID performance may vary with temperature check in application 3 European ETSI version others on request 4 The internal reset circuitry monitors the voltage at the 3V3 pin If the voltage is above 3 08V for 200 ms the module is started Technical Documentation metraTec DwarfG2 Mini Page 6 of 16 4 UART interface Min Typ Max Bau
5. mation Security Advice 1 1 Notes on the Use of this Documentation This user manual and integration guide uses different symbols to point out potentially dangerous situations The following signs and symbols are used throughout the document 1 2 Symbols Used This user manual and integration guide uses different symbols to point out potentially dangerous situations The following symbols are used throughout the document ATTENTION A Indicates a potentially hazardous situation If this is not avoided the product or something in its surrounding could be damaged NOTES o Declares notes for the user as well as other useful information where no harmful or dangerous situations can be expected 1 3 Security Advice The DwarfG2 Mini UHF SMD Module was not designed for use in dangerous environments Using this product in applications where a failure could directly result in severe injuries or death high risk activities is not permitted This includes but is not limited to applications in nuclear facilities flight control systems life support systems or weapon systems The manufacturer denies the suitability of this device for such scenarios 1 4 Export Restriction The DwarfG2 Mini UHF SMD Module contains components that underlie US export restrictions It is therefore forbidden to export the product to countries that are on the US trade embargo list The same applies to any countries that are on the EU embargo list 1 5 Furth
6. rnal 50 Ohm series resistor 1mA drive strength GPIO_O 11 I O 3 3V GPIO direction is configurable via FW command internal 50 Ohm series resistor 1mA drive strength GND 12 Pas GND connection use as ground reference for GPIOs Technical Documentation metraTec DwarfG2 Mini Page 8 of 16 Fig 1 Pad Positions NOTES T An Eagle library is available to facilitate designing in the DwarfG2 Mini Technical Documentation metraTec DwarfG2 Mini Page 9 of 16 6 External connectors 6 1 U FL antenna connector X1 50 Ohm RF antenna connection available on request Use 50 Ohm U FL or compatible cable to connect to antenna RF output on SMT pad 2 is standard configuration 6 2 Wire to Board connector X2 The UART and power signals are available on a W rth WR WTB4 1 25 THT connector PN 653004117322 on request This connector is not mounted in standard configuration Pin Pin Direction Function name Nr TXD X1 1 Out 3 3 V UART data output RXD X1 2 In 3 3 V UART data input GND X1 3 Pas GND connection use as ground reference for power supply and UART 3V3 X1 4 Pwr In module power supply use a regulated low noise supply to power the module place decoupling capacitors close to the pin Technical Documentation metraTec DwarfG2 Mini Page 10 of 16 Fig 2 Positions of optional external connectors on DwarfG2 Mini Technical Documentation metraTec DwarfG2 Mini Page 11 of 16 7
7. y metraTec RFID Slutio ms Technical Documentation for metraTec DwarfG2 Mini UHF SMD Module Date June 2015 Version 1 1 Technical Documentation metraTec DwarfG2 Mini Page 1 of 16 Table of Contents 1 General Information Security ZAOVIPB ssepe OMPREKIIR NIE DE HEHRINIRES MN P IE D EDEREMARN EMINENS 3 1 1 Notes on the Use of this DocuUMentation c0ccccecceceeccccceccccsscessseeuusseeeeesseeeeeeeeeeceseeas 3 12 Symbols b TRE 3 1 3 S cumty A VICS sarnases o QU aa ctn put 3 UR EXPONE RESTICH sde e E AS ki 1 5 Further Doounsehtet Doer ea DURER OQ ERRR VIDERE Pad Rara gan ta Plau Vin anieri VERRE gt 2 Features ccc e U 5 3 Electrical SC ENCE NAS siepe E ata pt teal aE E rp m deoa 6 A UART interrate ereere EE EET N E E EE a tau ave T 5 Pad description EN Nn tR eC tte et cen rrr errr rT errr erin Te 8 6 External corinectors c ies videaweistavdedocdavansvocassoceteeuvaeusdeduedvenwaedocdedocanusas Do ED e Ode ev aed cd 10 6 1 U FL anterina connector X1 eir r ra pe bed tee terree ecu EE E EEE ESEA 10 6 2 Wire to Board connector X2 eee e nne ene e e hee enne sese eese nns 10 VAI IREISDREP T I O EE E E E ORAE E 12 2G Tadife Mls NN RETE ULT 13 9 Further INOtGes v oett rte eene tae Petr eee esee Pm ed Pee a erae nens 14 bi ics ilg p 15 Technical Documentation metraTec DwarfG2 Mini Page 2 of 16 1 General Infor
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