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ZMD41211 iso 15693 wireless tag ic with integrated temperature sensor data sheet rev. 0.7 / september 2008
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 2 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 benefits ? low cost multifunctional temperature logger, only printed coil and 1.5v battery needed to build smart active label ? command set fully compatible with the requirements of iso 15693 and can communicate with every standard iso 15693 reader. ? different sensor functionalities are feasible using a digital interface ? powerless storage of values brief description the ZMD41211 is a fully integrated passive 13.56 mhz iso15693compliant transponder ic with an onchip temperature sensor and wireless initialization capability. with onchip timer to establish the log time base and eeprom to log the sensor data during operation, the ZMD41211 is designed to reduce product spoilage while enhancing the degree of automation and safety in logistics and transportation of goods. the onchip eeprom can be written in downlink direction and read in uplink direction by inductive coupling from a reader. the power is also extracted from the reader through inductive coupling. due to the onchip tank capacitor, the ZMD41211 only needs an external coil to communicate with a reader unit. the onchip timer unit allows the preselection of operating start time and log cycle, hence the log scheme is programmable for a variety of applications. features ? passive transponder with battery powered onchip temperature sensor, data management unit and timer to log the sensor data/timing product. ? wireless initialization capability ? operates at 13.56 mhz with onchip tank capacitor, rectifier and voltage limiter ? communication range up to 1 meter ? iso/iec 15693 compliant ? 8 kbits eeprom (720 temperature data) ? internal real time clock (+/ 3%) ? internal temperature sensor (+/ 1c) ? interface to external humidity sensor ? multi level password protection ? 8 different log modes available support ? evaluation kit available (including board, samples and software) ? customization of the ic is possible for high volume requests applications ? with the adding of antenna and battery to the assembly intended by smart active label. ? transportation and logistics management of temperature sensitive goods ? perishable logistics, transportation and storage of pharmaceutical products ? contactless item identification ZMD41211 overview
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 3 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 contents contents ........................................... ................................................... ................................................... ..... 3 list of figures .................................... ................................................... ................................................... .... 4 list of tables ..................................... ................................................... ................................................... .... 4 1 electrical characteristics......................... ................................................... ........................................... 6 1.1. absolute maximum ratings (non operating) ........... ................................................... ................. 6 1.2. operating conditions and ic parameters ............. ................................................... .................... 7 1.2.1. rfidfrontend...................................... ................................................... ............................... 7 1.2.2. sensor and data logging............................ ................................................... ......................... 8 1.2.3. characteristics of digital pins .................... ................................................... .......................... 9 2 circuit description................................ ................................................... .............................................10 2.1. signal flow and block diagram ...................... ................................................... .........................10 2.2. rfidfrontend ...................................... ................................................... ..................................11 2.2.1. resonance circuit.................................. ................................................... .............................11 2.2.2. modulator / clamp circuit.......................... ................................................... ..........................11 2.2.3. rectifier .......................................... ................................................... ....................................11 2.2.4. por................................................ ................................................... ....................................11 2.2.5. regulator .......................................... ................................................... ..................................11 2.2.6. clock extractor.................................... ................................................... ................................11 2.2.7. data extractor..................................... ................................................... ................................11 2.3. controller ......................................... ................................................... .......................................12 2.3.1. iso interface...................................... ................................................... .................................12 2.3.2. command decoder.................................... ................................................... .........................12 2.3.3. data and control bus............................... ................................................... ...........................12 2.3.4. memory access ...................................... ................................................... ............................12 2.3.5. eeprom block....................................... ................................................... ............................12 2.4. sensor and data logger ............................. ................................................... ............................12 2.4.1. timer .............................................. ................................................... ....................................12 2.4.2. temperature measurement unit....................... ................................................... ...................13 2.4.3. external sensor interface.......................... ................................................... ..........................13 2.4.4. temptimeproductout, customout.................. ................................................... ...............13 2.4.5. data logger control................................ ................................................... ............................13 2.5. battery management ................................. ................................................... ..............................13 2.5.1. battery measurement unit........................... ................................................... ........................13 3 functional description............................. ................................................... ..........................................14 3.1. general working mode............................... ................................................... .............................14 3.1.1. passive transponder operation ...................... ................................................... ....................14 3.1.2. data logger operation.............................. ................................................... ..........................14 3.1.3. i2c communication .................................. ................................................... ...........................16 3.2. operation mode for data logging.................... ................................................... ........................16 3.2.1. memory organization of logging data ................ ................................................... ................17 3.2.2. behavior with stuffed measurement memory........... ................................................... ............18 3.2.3. influence of the rffield on the data logging...... ................................................... ...............18 3.3. sensor communication ............................... ................................................... ............................18 3.3.1. sensor protokoll................................... ................................................... ...............................19 3.4. i2cinterface...................................... ................................................... ......................................20 3.4.1. i2c commands....................................... ................................................... .............................21 4 transponder commands ............................... ................................................... ...................................26 4.1. format of custom command ........................... ................................................... .......................26
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 4 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 4.2. command list....................................... ................................................... ..................................26 4.2.1. iso15693 compatible commands ....................... ................................................... ...............26 4.2.2. custom commands .................................... ................................................... ........................27 4.3. data security ...................................... ................................................... ....................................27 5 calibration procedure .............................. ................................................... .........................................29 5.1. calibration block segmentation..................... ................................................... ..........................29 5.2. calibration principle .............................. ................................................... ..................................31 5.2.1. twopoint calibration.............................. ................................................... ............................31 5.2.2. threepoint calibration ............................ ................................................... ...........................34 5.3. cyclic redundancy check (crc) calculation for valid ation of calibration data.......................... 35 5.4. calibration flow ................................... ................................................... ...................................36 5.4.1. calibration via wireless communication............. ................................................... .................36 5.4.2. calibration via i2cinterface...................... ................................................... ...........................38 6 memory map......................................... ................................................... ............................................40 7 pin configuration and package ...................... ................................................... ...................................41 7.1. pin configuration.................................. ................................................... ...................................41 7.2. pin/pad description ................................ ................................................... .................................42 7.3. chip layout........................................ ................................................... ....................................43 8 application notes.................................. ................................................... ............................................44 8.1. connection of external sensor ...................... ................................................... ..........................44 8.2. antenna layout ..................................... ................................................... ..................................44 9 additional documents ............................... ................................................... ........................................45 10 glossary........................................... ................................................... ...........................................46 11 document revision history.......................... ................................................... ................................47 list of figures figure 2.1 ZMD41211 architecture .............................. ................................................... ........................10 figure 3.1 log mode C measurement differentiation ............. ................................................... ...............16 figure 3.2 sifc, sifd pad application ......................... ................................................... .......................21 figure 3.3 i2c communication sequence......................... ................................................... ....................22 figure 5.1 temperature calibration point location............. ................................................... ..................31 figure 5.2 battery voltage calibration point location......... ................................................... ..................33 figure 5.3 illustration of 3point calibration................ ................................................... ..........................34 figure 5.4 typical settling behaviour......................... ................................................... ..........................37 figure 6.1 eeprom overview C quasipermanent data ............. ................................................... ........40 figure 6.2 eeprom overview C measurement data ................. ................................................... ..........40 figure 7.1 pinout diagram .................................... ................................................... ..............................41 figure 7.2 chip layout........................................ ................................................... .................................43 figure 8.1 schematic with sensor (left) and with annunciator ( right) ............................................. ..........44 figure 8.2 antenna layout example ............................. ................................................... .......................44 list of tables table 1.1 absolute maximum ratings........................... ................................................... ....................... 6 table 1.2 general operating conditions ....................... ................................................... ....................... 7 table 1.3 characteristics of logging systems................. ................................................... ..................... 8 table 1.4 current consumption and temperature measurement pro perties ........................................... 8
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 5 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 table 1.5 timer oscillator details ........................... ................................................... ............................. 8 table 1.6 driver capability.................................. ................................................... ................................. 9 table 1.7 eeprom characteristics ............................. ................................................... ........................ 9 table 3.1 log mode summary................................... ................................................... .........................17 table 3.2 command sequence for ic initialization............. ................................................... .................23 table 3.3 command sequence for temperature measurement unit ( bmu) activation ...........................23 table 3.4 command sequence for writing user/temperature data eeprom .......................................24 table 3.5 command sequence for user/temperature data eeprom r eadout.....................................25 table 3.6 command sequence for timer oscillator activation se quence ............................................. .25 table 4.1 iso commands ....................................... ................................................... ...........................26 table 4.2 custom commands .................................... ................................................... ........................27 table 4.3 access rights according to password usage.......... ................................................... ............28 table 5.1 structure of block 05 for calibration data......... ................................................... ...................29 table 5.2 structure of block 06 for calibration data......... ................................................... ...................29 table 5.3 structure of block 07 for calibration data......... ................................................... ...................30 table 5.4 byte fragmentation of calibration blocks ........... ................................................... ..................35 table 5.5 command format of set cal.......................... ................................................... ..................36 table 5.6 command response when error flag is set............ ................................................... ............36 table 5.7 command response when error flag is not set ........ ................................................... ..........36 table 5.8 command sequence for temperature measurement unit ( tmu) activation ...........................38 table 5.9 command sequence for writing parametereeprom ...... ................................................... ..39 table 5.10 command sequence for parametereeprom readout ...... ................................................... 39 table 7.1 pin list........................................... ................................................... .....................................42
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 6 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 1 electrical characteristics 1.1. absolute maximum ratings (non operating) the maximum rating parameters and limits, respectiv ely, define the outer range of electrical or therma l resistibility of the ic. in this section, the param eters limits do not reflect limits of operation. table 1.1 absolute maximum ratings symbol parameter min max unit conditions v coil1 v coil2 coilpad voltage 8.5 8.5 v i coil maximum coil current 40 40 ma v bat battery voltage 0.3 3.6 v v dd custom out 0.3 v bat + 0.3 v v outc sifc (open drain) 0.3 3.6 v v outd sifd (open drain) 0.3 3.6 v t stg storage temperature 55 125 c v esd esd capability at pins, except for vpp1/2 2 2 kv electrostatic discharge (esd) model: human body model (hbm) t stg storage temperature 55 125 c i in input current into any pin (latchup protection) 100 +100 ma @ t amb = 100 c
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 7 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 1.2. operating conditions and ic parameters all voltages are referenced to v ss if not noted otherwise. 1.2.1. rfid-frontend table 1.2 general operating conditions general symbol condition min. typ. max. unit operating temperature 40 85 c frequency of operation 13.553 13.56 13.567 mhz supply voltage (regulated) digital part v dd 1.1 1.2 1.35 v operating current out of regulator i dd 100 ua resonance circuit resonance capacitor c res 28 28.3 pf operating magnetic field h 0.15 5 a/m rms resulting quality factor of tank circuit q 50 modulator / clamp clamp voltage limit v coil1 v coil2 i c =150ua 5.2 6.2 v i c =15ma 6.8 8.0 v coilpad voltage during modulation v coil1 ; v coil2 i c =100ua 1 2.1 2.5 v i c =15ma 3.5 4.5 v rectifier rectifier voltage drop (v coil1 v coil2 ) v sup i sup =10ua 0.7 v supply capacitor c sup 300 pf power enable threshold v sup 2.3 2.6 2.85 v power enable start v coil1 v coil2 =v ss 2.6 3.3 4,0 v v sup 2.1 2.4 2.65 v power enable stop v coil1 v coil2 =v ss 2.5 3.1 3.9 v
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 8 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 1.2.2. sensor and data logging table 1.3 characteristics of logging systems general symbol condition min. typ. max. unit operating temperature 30 60 oc storage temperature with permanent applied battery t stg 45 60 ( 1 oc battery voltage v bat 1.15 ( 2 1.3 1.55 v single data points storable 720 annotations: ( 1 with 80 oc, the idle current increases by 10 time s compared to ambient temperature; therefore only s hort term storage temperature excess to 80 oc is recommended. ( 2 to maintain all parameters only with v bat >1.15v; with v bat = 1.1v full function is ensured, however slight parameter excesses are possible. table 1.4 current consumption and temperature measu rement properties current consumption at v bat symbol condition min. typ. max. unit idle current, timer off i bat temp = 20 oc 80 200 na timer on, no temp measurement i bat temp = 20 oc 1.0 1.4 2.5 ua temp measurement and eeprom write i bat duration <0.5s 150 ua temperature measurement temperature range 30 50 oc resolution 0.13 0.2 0.3 oc accuracy as deviation from the calibration value after 2point calibration 1.0 +1.0 oc a 2pointcalibration process determines the accura cy of temperature. during wafer or device test, the calibration values can be determined and stored in the eeprom. please contact zmd for incorporating th e respective customization. table 1.5 timer oscillator details timer symbol condition min. typ. max. unit oscillator frequency f 8.2 khz accuracy f_acc 30+50 oc 3.0 +3.0 % programmable time interval ltimi duration <0.5s 2 32766 sec
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 9 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 1.2.3. characteristics of digital pins sensor interface pins sifc/sifd are open drain inpu toutputpins with esd protection to v ss . the custompin is a tristatetyped cmosoutput with esd protection to v ss and v bat . table 1.6 driver capability sifd and sifc symbol condition min. typ. max. unit maximum high level v out_max 3.3 v external clock signal clk_max 200 khz dccurrent at open drain on i ol1 v ol1 =0.1v 295 445 ua dccurrent at open drain on i ol2 v ol2 =0.2v 535 805 ua dccurrent at open drain off i hiz v out =1.5v 1 +1 ua custom dccurrent at custom = low i ol v ol =0.2v 540 785 ua dccurrent at custom = high i oh v oh =v bat 0.2v 210 310 ua custom = tristate i hiz v out =0v bat 1 +1 ua table 1.7 eeprom characteristics symbol parameter min typ max unit conditions t datar data retention 10 a @ t amb as specified for consumer or industrial range cycling endurance 100000 cycles
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 10 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 2 circuit description 2.1. signal flow and block diagram the ZMD41211 combines an iso 15693 compliant 13.56m hz transponder with data logging system and on chip temperature monitor or external sensor input. the coil of the lc tank is the only external compon ent needed to enable wireless communication. an additional battery is necessary for the supply of t he data logger. a special idle mode is supported, s uch that the battery can remain constantly connected. all op erating modes are controllable by wireless commands . figure 2.1 ZMD41211 architecture custom l res c res clock extractor rectifier clamp / modulator data extractor por vss bias c sup c rfid vsup rfid_reset mod clock data coil1 coil2 vrfid regulator d testblock testvsup coil1 coil2 sifd sifc battery management iso interface command decoder user/tempdata eeprom external sensor inteface time set & compare register programmable counter programmable oscillator time calibration control temperature measurement unit battery measurement unit parameter eeprom memory access data logger control temp time product out pre scaler vbat data & control bus ZMD41211 rfid - frontend sensor & data logger controller vpp1 vpp2
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 11 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 2.2. rfid-frontend the rfidfrontend contains all functions for power generation, voltage protection and data extraction. it obtains its power solely from the received magnetic field. 2.2.1. resonance circuit the input lc tank has to be in resonance with the operating frequency f c . the quality factor q should be high enough to provide a sufficient operating volta ge. q should not exceed a certain limit such that e nough energy is available for the operation of the transp onder especially also at the tolerance limits of th e transmission frequency. 2.2.2. modulator / clamp circuit the clamp circuit will protect the ic from over vol tages. at weak magnetic field conditions, it is not allowed to consume more than a specified maximum current. at s trong field conditions the clamp circuit has to dra w a specified minimum current to load the tank more int ensively and limits the input voltage. the circuit will also be used for load modulation. if the modulation signal is on, the input voltage w ill not be allowed to drop that far such that the clock extrac tor stops working. with a high coil pad current (st rong field situation), the modulatoron input voltage must dro p to a value well below the clamp voltage to allow for modulation detection by the reader device. 2.2.3. rectifier the rectifier has to perform a full wave rectificat ion of the input voltage at the operating frequency . if v sup exceeds the input voltage, c sup will not be allowed to discharge via the rectifier . 2.2.4. por the poweronreset will enable the digital core if a threshold voltage v sup is reached. if v sup drops below a second lower threshold, the ic will enter reset mod e. 2.2.5. regulator the regulator provides constant voltages vrfid from v sup . it provides a supply voltage to the controller un it via battery management. 2.2.6. clock extractor the clock extractor generates a 13.56 mhz clock fro m the input voltage as soon as the latter exceeds a specified threshold. if the input voltage drops due to modulator action, the clock signal will remain stably. if the data extractor receives a gap (100% modulation) , the clock signal will stop. 2.2.7. data extractor the data extractor will detect reader modulation ga ps. it accepts only those gaps which are in accorda nce with the tolerances described in iso 156932 and su pports both, 100% and 10% modulation. the data extractor operates reliably over a wide dynamic ran ge.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 12 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 2.3. controller the controller unit works with power from magnetic field or will be powered from an external battery. 2.3.1. iso interface to fulfill the iso 15693 standard, the logic unit p erforms an anticollision function, crc, on outgoin g and incoming commands, ask/fskmodulation and start/end offrame detection/generation. 2.3.2. command decoder the command decoder interprets the readers command s and generates control signals for the data logger control to control the main section sensor & data l ogger. 2.3.3. data and control bus the data bus transmits write/read data between comm and decoder and eeprom as well as the temperatures time stamp of the data logger. 2.3.4. memory access this functional unit acts as an interface to write and read the eeprom. it calculates addresses and manages access permissions of the memory block. 2.3.5. eeprom block for storing measuring data, an 8kbit eeprom is impl emented being divided into two subarrays internall y: ? the parameterarray being organized in 16 blocks o f 32bits each and ? the user/temperature dataarray consisting of 240 x32bits. priority write read access is possible during trans ponder communication in the magnetic field. with ac tivated data logging, temperature data is written to the da taarray. a charge pump is integrated. its internal pump volt age is observable at pad vpp1/2 only by wafer test. 2.4. sensor and data logger the main section: sensor & data logger is powered e xclusively by the battery. it contains a timer, the temperature measurement unit, an external sensor in terface, the temptimeproductout and a control unit. 2.4.1. timer a timer is integrated which generates the internal time base. the time base is adjustable and contains a programmable counter/oscillator, the time set & com pare register and a time calibration control. the frequency of the oscillator is calibrated to be 8kh z by means of trim registers. latter are transferre d from the memory when the timer starts. preselection time an d interval time are stored in the time set & compare register. thus a starting time i s given, from which the interval timer counts with fixed time steps.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 13 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 moreover, a special feature is implemented: the tim ers synchronization to the highly precise 13.56mhz carrier frequency. therefore the rfid clock is adap ted to the target frequency via the prescaler. base d on that, the internal oscillator is synchronized to th e target frequency of 8khz. 2.4.2. temperature measurement unit the temperature measurement is started by the unit: data logger control. the data logger control receives the request from the interval timer after expiration of the interval for a new measurement. t hen the 10bit measured value is written to the eeprom. the custom command reads out the counter value from the user/temperature data eeprom and calibration parame ters from the parametereeprom. at the reader side, the respective register value has to be inter preted as temperature. 2.4.3. external sensor interface on the one hand the interface enables the connectio n of an external humidity sensor via an i2clike transmission protocol. on the other hand a circuit test of this block can be conducted. the external s ensor interface connects opendrainin/out sifc (i2ccloc k) and sifd (i2cdata) directly. furthermore, exter nal pullup resistors are additionally integrated to sup port sensors with higher operating voltages. 2.4.4. temp-time-product-out, custom-out this functional unit calculates the product of time and temperature continuously during data logging. there will be a lowhightransition, if a preset temperat uretimeproduct is exceeded. 2.4.5. data logger control with a custom command the data logging cycle can be started or stopped. the control unit gets all rele vant initial parameters from the memory, preloads the re gisters and starts the data logging. 2.5. battery management dependent on: main states idle, logging, recording and transponder communication, different blocks are activated and a poweronreset control is realized. power supply vrfid and external battery are switch ed to controller and data logger. 2.5.1. battery measurement unit the charge of the battery can be observed with the connected battery measurement unit. in case of a voltage falloff below a certain limit an erroneous temperature measurement is prevented and a flag is stored. the voltage result is represented a s 6bit count in a register and can be fetched by m eans of a custom command. battery measurements can be trigger ed by a single custom command as well as during data logging.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 14 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 3 functional description 3.1. general working mode there are three general application types of the zm d41211: 1. operation as passive transponder (i.e. tag) with a connected coil; 2. the operation as data logger which requires an a dditionally connected battery (with about 1.5v). this is the intended main application type. the tem perature sensor and the data logger will be active here. if an additional sensor with (modified ) i2c functionality is applied, its data will be al so considered during the logging process. 3. the operation only with a connected battery (wit hout coil) enables the test mode and provides the possibility for an i2ccommunication via sifc, sifd and custom. 3.1.1. passive transponder operation the operation with a coil allows for wireless commu nication according to iso 15693 standard. communication between reader and tag complies with the following steps: ? powering up the tag by the rf operating field, gen erated by the reader; ? tag waits in idle mode; ? reader sends a command (request); ? tag responds to the command (response). the transponder is designed to operate with a 13.56 mhz carrier frequency. communication between the reader and the transponder (downlink communication ) takes place using an ask modulation index between 10% and 30% or 100% and data coding (pulse position modulation) 1 out of 4 or 1 out of 256 . according to iso 15693 uplink communication (trans ponder to reader) can be accomplished with one subcarrier (ask modulation) or with two subcarrier (fsk modulation). both modes (ask and fsk) can operate with either high or low data rate. the tran sponder answers in the mode it was interrogated fro m the reader and supports all communication parameter com binations. up and downlink are frame synchronized and crc check sum secured. a complete access to the user/temperature data eepr om is possible. moreover the parametereeprom can be accessed using the custom commands. 3.1.2. data logger operation the module sensor & data logger is powered by the s upply voltage from the battery. the establishment o r termination of wireless communication via the rfid frontend starts and stops the data logger, respecti vely. data logging is mainly the processing and storage o f temperature measurement at equidistant time steps . the mean value of these measurements will be buffer ed. according to the logging method, the respective ly buffered value will be compared and combined with p revious values or it will be stored in the eeprom (together with the respective time stamp) directly. the data logging flow is exclusively only controlle d by custom commands. at first, the initialization command erases the data eeprom which is divided int o customer and temperature section. afterwards the operation parameters have to be entered being follo wed by the customer data. then, the start command w ill start the timer and the logging parameter will be t ransferred to the flow control. overwriting of the logging parameters will change the memory content but not t he flow control.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 15 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 inbetween, data requests or stopping the data logg ing are possible during the monitoring period. in l ogging mode, all temperature and sensor data will be store d at equidistant time steps. after the expiration o f the intended logtime, the rfidfield (at the reader) m ust be switched on and the coil must be within the rfid field, respectively. the temperature data can be re ad out and the stop command will switch off the tim er. then, a new initialization command will prepare the ic for a new measurement run. recommendation command flow data logging init (cb) set log mode (logmode) set log timer (log intervall) get log state set custom (ttp) start log (start time) get timer state get state get one block set passive get log state iso command read multiple blocks comments eep-memory is divided in user- and temp-blocks cb = number of user blocks erase user/temp-eeprom, (refer to memory map) set log-mode, temp-limits, battery-check-intervall set storage-mode set intervall-time, timer preset read log parameter from eeprom to check memory content. optionally: activate custom output calculate ttp = temperature-time-product load log-parameter from eeprom to start-register, timer starts monitoring: timer counts, battery voltage level read timer trimm register, ttpmax, revision-nr., cb-nr. custom-flag. read 1 block from parameter-eeprom, available blocks: adr 0 C 0x0c (not password!) timer stops read log parameter from eeprom to evaluate temperature, battery voltage, time stamps (postprocessing). read all blocks from user/temp-eeprom
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 16 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 3.1.3. i2c communication the digital i2c interface is accessible via the pin s: sifc (clock) and sifd (bidirectional data). the interface provides two general functionalities: 1. the transmission protocol slightly differentiate s from the i2cstandard when the ic operates as dat a logger. at each start of the data logger, the recog nition sequence is send from the master to the external sensor via the sifd pad. the data line has to be high in this case. thereafter the communication is established and external sensor me asurements are stored like for the internal temperature measurement. a detailed description on that can be found in section 3.3. 2. an i2cslave is integrated for the sake of ic te sting or for temperature calibration purposes. the i2c slave can be accessed via two internal device addre sses. the temp/battery measurement unit, the timer oscillator and read/write of the eeprom can b e accessed for this way (see section 3.4 for further details). 3.2. operation mode for data logging the complete measurement rang is divided into good and corrupted. the definition of an upper and lower measurement limit yields a band with goodvalues (g reen region in fig. 3.1). hence, there will be thre e scenarios of measurement as depicted in fig. 3.1. t he diagram can be interpreted extendedly if an exte rnal sensor was applied. figure 3.1 log mode C measurement differentiation 1 2 3 4 5 6 7 time t = log count temperature or external measurements tmin tmax t1 t2 t3 t4 t6 t7 t5
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 17 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 the different logging modes are: ? log mode 0: record measurements beyond the limits: {(t6, t2), (t7, t3), (t5, t4), (t1, t5), (t2, t6)} , whereas the limits are only valid for exclusively only one of the two possible sources ? log mode 1: record all measurements and time stam ps: {(t4, t1),(t6, t2), ...}; ? log mode 2: record measurements beyond the limits : {(t6, t2), (t7, t3), (t5, t4), (t1, t5), (t2, t6) }; ? log mode 3: record measurements beyond the limit with 3 value pairs (1 st limit exceeding, extremum, 1 st reentry) : {(t6, t2), (t7, t3), (t1, t5)} ; {(t1, t5), (t1, t5), (t3, t7)}. moreover the following operation modes can be reali zed: ? save measurements from internal temperature sensor : operation mode 13; ? save measurements from external sensor (e.g. humid ity sensor): operation mode 57; ? save measurements from both, internal and external sensor concurrently: operation mode 4 and 8 dependent on the defined limits of the respective sensor. generally, it is to distinguish between taking meas urements in different measurement scenarios (log mo de) as in fig. 3.1 and taking measurements from differe nt sources, i.e. internal or external sensor or bot h (operation mode). log mode 0 is an exception from t hat logical hierarchy. here, the limits according t o log mode 2 are considered for one measurement source (i .e. external sensor or internal temperature sensor) but both of the measurements are saved, though. table 3.1 log mode summary operation mode external sensor log mode description 1 no, ext=0 1 measure temperature, save all values, max. 720 values 2 no, ext=0 2 measure temperature, save all values beyond limit, max. 240 values 3 no, ext=0 3 save temperature & extremums, max. 24 0 values 4 yes, ext=0 0 for temperature & external sensor, s ave all values beyond temp.limit, max. 240 temperature values and 240 values from external sen sor 5 yes, ext=1 1 measure via external sensor, save al l values, max. 720 values 6 yes, ext=1 2 measure via external sensor, save al l values beyond limits, max. 240 values 7 yes, ext=1 3 external, save extremums, max. 240 v alues 8 yes, ext=1 0 for temperature & external sensor, s ave all values beyond the externallimit, max. 240 temperature values and 240 values from ext ernal sensor log mode and ext = 1/0 are elements of the log para meter (cp. ZMD41211 command description). 3.2.1. memory organization of logging data due to the multipurpose ways for saving logging da ta, there are two different parameters for memory organization: 1. the logdata address, lgad provides the pointer to the next memory blocks address and
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 18 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 2. the logcounter, lcnt counts the number of condu cted measurements. these parameters are determined by the data logger control and are saved in the eeprom block 0b h . additionally a dedicated part of the memory is pres erved for customer data covering a certain number, cb of memory blocks. cb divides the user/temperature data eeprom into two partitions (see memory map). the start address is obtained by: start_address = lgad = 10 h + cb . in log mode 1, three measurements are written to on e memory address in each case, whereas the writing to the user/temperature data eeprom is realized after the completion of the respective three measurements . thereupon lgad is incremented once and lcnt is incr emented three times. in parallel, the block 06 h refreshed. multiple overwrites of measurement data (within the block addresses: 10 h +cb until ff h ) is possible and can be selected by the state log memory overwrite, slmo in block 0a h . an overflow counter, lmo will be activated, if the dedicated overwriting of memory i s selected. lmo is located in block 0b h . in the log modes 0, 2 and 3, not any measurement va lue will be considered. a memory block address will be overwritten for exceeding a limit per measurement v alue. furthermore the respective lcntvalue will be saved at this address. the block 0b h will be refreshed after each measurement. 3.2.2. behavior with stuffed measurement memory logging will be stopped, i.e. no measurement will b e conducted as soon as it holds: 1. no overwriting at slmo=0 and lgad=ff h (lmo=0) or 2. overwriting allowed slmo=1, lcnt=3fff h or lmo=3f h . the log parameter will remain at their maximum leve l. the timer will keep on running. the flag log_sto p will be set 1 (this flag is bit[15] in block 0b h ). data logging must be stopped manually by the cus tom command: set passive. 3.2.3. influence of the rf-field on the data loggin g pending measurements will be postponed, if the tran sponder is logging data and enters the rffield. wh en the rffield will have been left, all missing measu rement results are replaced by zero values. at the beginning of a measurement, it is verified w hether this measurement was postponed more than 0.5 s. if this is the case, no measurement will be conduct ed and the value: 0 will be saved, regardless on th e set up operation and measurement mode. only the external m easurement value will be set to 0 for modes with internal and external measurements C the internal m easurement will be undefined then. 3.3. sensor communication the external sensor is connected to the ZMD41211 vi a sifc and sifd. the ZMD41211 acts as master, generates the clock, requests and fetches data by r espective commands. thereby, the logging parameter ext determines wheth er the extremums, t min and t max (cp. fig. 3.1) are referred to the internal temperature sensor (ext = 0) or to the external sensor (ext = 1). sifc and sifd should be at vss level, if no externa l sensor is applied.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 19 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 3.3.1. sensor protokoll moreover the zm41211 comes with a specially designe d transmission protocol for a dedicated sensor, details available on request. during the communication, reset sequence, start seq uence and data transfer are distinguished from each other. any transmission is initiated by reset and s tart sequence from the ZMD41211. a configuration by te is transmitted to the sensor with the very first initi alization. afterwards, only measurements are conduc ted which are controlled by the respective measurement command to the sensor. the master sets the clock signal to low and the data line to high and waits f or measurement completion. the latter is indicated by the highlow transition of the data line (realized by t he sensor) being followed by the transmission of th e measurement data from sensor to the ZMD41211. an ac knowledge is generated by the ZMD41211/sensor after the transmission of 8 bit of data by drawing the data line to low for one bit. in case of lost synchronization, the master can reset the interface with the reset sequence. 3.3.1.1. reset sequence the reset sequence consists of 9 l/h/l clock transi tions, whereas the data line (sifd) is high. the re set sequence reinitializes the communication interface . 1 2 3 4 5 6 7 8 9 sifc reset sequence (sifd = high) sifd 3.3.1.2. start sequence the start sequence consists of 2 l/h/l clock transi tions. the data line turns from high to low during the 1 st clock high phase and back, from low to high during the 2 nd clock high phase. 1 2 sifc start sequence sifd 3.3.1.3. data transfer to sensor the change of data bits between high and low (on si fd) may occur in the clock low phase for data trans fer to the externally connected sensor. during the high phase of clock (sifc), the data bits are considere d as valid and will be transferred. the external sensor will acknowledge the data reception with the ninth bit on the data line, sifd. 1 2 3 4 5 6 7 8 9 ack transmit byte to sensor sensor sifc sifd
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 20 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 3.3.1.4. data transfer from sensor the data transmission from sensor to the ZMD41211 i s comparable to the data transfer to the sensor exc ept the communications roles. data bit changes may occ ur during the (sifc) clock low phase. the respectiv e bits are considered at the clock high phase. the zm d41211 will acknowledge the receiving of the data b yte with low level of bit[9]. the communication will be stopped with the last byte being received whereas no acknowledge will be provided (for the last data byt e). 1 2 3 4 5 6 7 8 9 ack receive byte from sensor master sifc sifd 3.3.1.5. data frame the complete data frame comprises the following: 1. reset sequence C start sequence C send 06 h C send 01 h 2. reset sequence C start sequence C send 05 h C C read xx h C read xx h 3. ... reading of data (step 2.) will always be repeated d uring logging. the communication will be interrupte d by the master after the receiving of the last byte. th e stopping interruption is realized by omitting the last acknowledge. data and commands are transferred msb first. in normal case, the first received byte is z ero. ack sensor no ack master ready ack receive byte1 from sensor master init2 (00000001) 1 2 3 4 5 6 7 8 9 ack init1 (00000110) sensor 1 2 3 4 5 6 7 8 9 ack start measure (00000101) sensor 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 8 9 reset sequenz 1 2 start sequenz 1 2 8 9 reset sequenz 1 2 start sequenz receive byte2 from sensor sifc sifd 3.4. i2c-interface a twowire interface is built up by the bidirectio nal pads: sifc and sifd. the respective lines have to be load by supply via external pullup resistances (of 10k to 500k each). thereby the external sensor a nd an external i2c master, respectively, can be run at an extended supply voltage range of 1 v to 3.3 v. the connection of a coil is not required but possible c ommunication. an external control device has to take over the i2c master role. this device must generate and communi cate the control commands to access the eeprom and inter nal measurement units. the usage of an external control device excludes the working mode: data logg er! in figure 3.2, connection options for i2ccompliant applications are shown.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 21 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 the frequency range of the i2cclock (pad sifc) dep ends on the capacitive load. a clock (10khz C 200kh z range) is recommended to ensure optimum operation. additionally, the ZMD41211 contains the custom pad which is a tristatecapable monitoring output. it can be activated if required. figure 3.2 sifc, sifd pad application pad sif_d ext.vdd = 1 C 3.3 v appl. resistor ca. 10 500kohm sifd_in sifd_dis shield resistor 25 ohm i2c clk pad sif_c r ca. 10 C 500 kohm clk gener enb r ca. 25k i ca. 0,20,5ma 1.5v i2cdatagenerator or 100pf load sifd_in sifd_dis shield resistor 25 ohm ext.vdd = 1 C 3.3 v 3.4.1. i2c commands there are two independent i2cslaves integrated in the ZMD41211. each command has to be sent within an i2cframe. latter contains the coded command of the respectively intended ic action. according to the individual command, data might have to be sent or r eceived. the following i2c communication sequence is valid f or both, reading and writing of calibration data.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 22 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 figure 3.3 i2c communication sequence s : i 2 c start of frame e : i2c end of frame w : write bit = 0 r : read bit = 1 a : i2c acknoledge dev_adr : i2c device address test_cmd : test command wr_dat : write data (command dependent) rd_dat : read data (command dependent) dev_adr : ZMD41211 device address bus_adr : bus address device addresses for the ZMD41211 are fixed to 0x71 and 0x72 (assigned to battery management and to controller). the command: test_cmd is the bus address for writin g operations, whereas a dedicated bus address (bus_adr) must be transmitted by a separate command prior any read operation. with the transfer of dat a, the ZMD41211s internal address is incremented afte r each transmitted byte. at read operations, the acknowledge is generated by the i2cmaster. the ack nowledge bit has to be 1 and high, respectively, af ter the transmission of the last byte of read data. the following test names describe an i2cframe: - w_name: write commands - r_name: read commands - p: pause - o_name: observe commands on customout any i2c command is given in hexadecimal code. an a cknowledge from the ZMD41211 is denoted as ?a and ? denotes an acknowledge from the i2c master. in the following subsections, the main commands are described i.e.: ? access to user/temperature data eeprom, ? access to battery measurement unit and ? timer oscillator. accessing the parameter eeprom and the temperature measurement unit are required for calibration.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 23 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 attention! with access to the parameter eeprom also the access to the password blocks is possible. close the i2c access and connect sifc and sifd to v ss in case the custom commands for password protection ought to be used. 3.4.1.1. initialization sequence the ic must be initialized at the beginning of the command processing. the initialization starts timer and controller. the respective commands are summarized within the initialization sequence: power_on . table 3.2 command sequence for ic initialization command name i2c command comments power_on power initialization w_power_on sof0xe2a0x4aaeof timer and controll er on p wait > 5ms pause w_contr_sleep sof0xe4a0x90a0x00a0x63aeof c ontroller sleep r_power_standard accept: sof0xe3a0x07eof po wer on reset cycle successful 3.4.1.2. ?battery measurement unit activation seq uence there is a dedicated sequence to activate the batte ry measurement unit (bmu). the general steps are: reset C start C monitor readiness C result request via data bus. table 3.3 command sequence for temperature measurem ent unit (bmu) activation command name i2c command comments power_on power initialization w_cus_ready_bmu sof0xe4a0xccaeof ready signal of bmu connectio n via custompad w_reset_bmu sof0xe4a0x27a0x02aeof bmu reset p wait >1ms w_reset_return sof0xe4a0x27a0x00aeof return reset w_start_bmu sof0xe4a0x27a0x04aeof bmu starts o_rdy accept: rdy = 1 observe ready signal = high r_bmu_data sof0xe4a0x26a(eof) sof0xe5av1v2eof set bus address 26 h , readout and saving of 7bit counter data evaluation v1v2 = 25 60 decimal v1v2=7bit voltag e counter data w_cus_off sof0xe4a0xc0aeof custom pad connecti on: off w_power_off sof0xe2a0x45aeof power off 3.4.1.3. writing user/temperature data eeprom seque nce the following command sequence enables a complete a ccess to the user/temperature data eeprom.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 24 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 table 3.4 command sequence for writing user/tempera ture data eeprom command name i2c command comments power_on power initialization w_timerosc_off sof0xe4a0x6fa0x00aeof switch off clock p wait > 3 ms pause write into eeprom[1] valid address range 0x10 0x7f w_get_wire_rdy1 sof0xe4a0xc8aeof eeprom[1]rea dy at custom pad w_eep1_data sof0xe4a0x28abyte0abyte1abyte2abyte3 aadra0x03a0x00aeof write data: byte 0 3 to address adr into eeprom[1] p 18ms monitor rdy at custom pad (output rdy1 = lh) w_ eep1_dis sof0xe4a0x2da0x00a0x00aeof ce0 =we=0, eeprom[1] disable write new data to other address w_eep1_data sof0xe4a0x28abyte0abyte1abyte2abyte3 aother_adra0x02a0x01aeof write data: byte 03 to address other_adr into eeprom[1] p 18ms monitor rdy at custom pad (output rdy1 = lh) w_ eep1_dis sof0xe4a0x2da0x00a0x00aeof ce0 =we=0, eeprom[1] disable disable_rdy sof0xe4a0xc0aeof deactivate monitoring after end of writing write into eeprom[2] valid address range 0x80 0xff w_get_wire_rdy2 sof0xe4a0xc9aeof eeprom[2]rea dy at custom pad w_eep2_data sof0xe4a0x28abyte0abyte1abyte2abyte3 aadra0x03a0x00aeof write data: byte 0 3 to address adr into eeprom[2] p 18ms monitor rdy at custom pad (output rdy2 = lh) w_ eep2_dis sof0xe4a0x2da0x00a0x00aeof ce0 =we=0, eeprom[2] disable disable_rdy sof0xe4a0xc0aeof deactivate monitoring after end of writing
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 25 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 3.4.1.4. readout user/temperature data eeprom seque nce table 3.5 command sequence for user/temperature dat a eeprom readout command name i2c command comments read from eeprom[1/2] valid address range 0x10 0xff w_eep1_adr sof0xe4a0x2caadra0x00a0x05aeo f create eepromaddress, ce=oe=1, start readout w_eep1_dis sof0xe4a0x2da0x00a0x00aeof data takeover to bus r_data_out sof0xe4a0x28a(eof) sof0xe5abyte0abyte1abyte2abyte3eof set bus address, read block content: byte0123 w_power_off sof0xe2a0x45aeof power off 3.4.1.5. timer oscillator activation sequence in the power on sequence oscillator gets the trim v alues, ttemp and ttemp from eeprom block03. the trim values can be determined during the ics wafer test. table 3.6 command sequence for timer oscillator act ivation sequence command name i2c command comments power_on power initialization w_cus_8kclk sof0xe4a0xcaaeof 8khz clock connec tion via custompad p wait >1ms o_8kclk_frequency accept: 8kclk = 8192hz 3% meas ure timer frequency w_cus_off sof0xe4a0xc0aeof custom pad connecti on: off w_power_off sof0xe2a0x45aeof power off
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 26 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 4 transponder commands 4.1. format of custom command the generally valid format of the custom commands i s as follows: sof flag custom command code b0be mfc code, fixed=17h custom request parameters crc16 eof 8 bit 8 bit 8 bit custom defined 4.2. command list a complete description of the ZMD41211s commands i s given in the ZMD41211 command description. 4.2.1. iso15693 compatible commands the iso commands being implemented are listed in ta ble 4.1. structure and meaning of the commands are according to the iso standard: iso_156933. table 4.1 iso commands cmd code command description mandantory 01 inventory ZMD41211 shall perform the anticollis ion sequence 02 stay quiet ZMD41211 enters the quiet state optional 20 read single block read the requested block 21 write single block write the requested block 23 read multiple blocks read the requested multibl ock 25 select set to selected state 26 reset to ready return the ZMD41211 to the ready state 27 write afi write the afi value to ZMD41211 29 write dsfid write the dsfid value to ZMD41211 2b get system info fetch the system information val ue from ZMD41211 iso commands can only access the blocks which are a llowed for measurement and customer data i.e., blocks 10 h to ff h .
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 27 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 4.2.2. custom commands any customized write command includes an option fla g according to the iso command structure of write single block. thus one can influence the waiting b ehaviour of different reader types which support commands with response times >20ms. table 4.2 custom commands cmd code command custom option flag ( 1 description b0 init yes delete whole memory of the ZMD41211 b1 set_log_mode yes set log parameter b2 set_log_timer yes set log interval and preset ti me b3 set_custom yes set custom output setting b4 start_log yes start log procedure b5 get_log_state no get log state of the ZMD41211 b6 set_passive no stop log procedure b7 get_timer_state no get currently time state b8 get_state no get state of ZMD41211 b9 get_one_block no read requested system block ba timer_sync yes synchronize oscillator with reade r frequency bb get_voltage yes measure battery voltage bc set_cal yes set calibration values bd verify_pwd no verify password be set_pwd yes set password ( 1 option flag refer to ZMD41211 command description 4.3. data security a threelevel password concept controls: ? access to eeprom data and ? rights to carry out transponder commands. the parameter eeprom provides space for three diffe rent passwords. the command decoder will enter the passwordverifi ed state, if a special check routine is started af ter the transponder has entered the rfidfield. dependent o n the content of the password blocks: 0x0d to 0x0f, only limited access to the eeprom is granted and a limited number of transponder commands can be realized, respectively. remark: an access lock-out is safe only if the oute r access to sifd and sifc is prevented by e.g., shi elding with a cover foil. table 4.3 provides an overview of the access rights according to the respective password assignments.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 28 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 table 4.3 access rights according to password usage code command pwd_verified code command pwd_verified mandantory custom 01 inventory C b0 init 2 02 stay quiet C b1 set_log_mode 1 b2 set_log_timer 1 optional b3 set_custom 1 20 read single block 1 b4 start_log 1 21 write single block see below b5 get_log_status 1 23 read multiple blocks 1 b6 set_passiv 1 25 select C b7 timer_status 1 26 reset to ready C b8 get_status 1 27 write afi 2 b9 get_one_block 1 29 write dsfid 2 ba timer_sync 2 2b get system info C bb u_batt 1 details for ?write single block: bc kal_t 2 21 write block in addresses: bd verify_pwd C 10 h to vcb + 10 h 1 be write_pwd1 1 vcb + 10 h to ff h 3 be write_pwd2 2 be write_pwd3 3 the three levels depend on each other as follows: ? pwd3 verified complies with 3 = maximum security (includes 2 an d 1), ? pwd2 verified complies with 2 = medium security (includes 1), ? pwd1 verified complies with 1 = lowest security, ? no pwd verified complies with C = no security. further details on the security properties and opti ons of the ZMD41211 can be found in the ZMD41211 command description
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 29 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 5 calibration procedure temperature and battery voltage will be stored in e eprom after the measurements completion. two pairs of values (ccntx, ctempx) are stored for the interp retation of the counter content in the parameter se ction of the eeprom. at any preset temperature, the count er content is output by the temperature measuremen t unit. a pair of values for calibration, i.e. a cal ibration point consists of such a counter content a nd the respective temperature. a linear approximation of the relation between temp erature and counter content can be achieved as soon as two different calibration points have been obtained . thereby the measurement precision of the temperat ure is determined by the control precision of the refer ence calibration temperature. the generation of calibration data, the storage in eeprom and the processing of the counter content in to temperature values are content of this chapter. 5.1. calibration block segmentation temperature and counter content are stored as 10bit values with an additional (11 th ) sign bit for the temperature. the pairs of values are stored in the calibration blocks with the addresses 05 h C 07 h within the parameter eeprom. table 5.1 structure of block 05 for calibration dat a bit [31:22] bit [31:11] bit [10:0] counter content: lower calibration temperature upper calibration temperature lower calibration tem perature ccnt1 ctemp2 ctemp1 6 4 2 0 14 12 10 8 22 20 18 16 30 28 26 24 adr=05h ctemp1 ccnt1 ctemp2 sign sign table 5.2 structure of block 06 for calibration dat a bit [29:20] bit [19:14] bit [13:08] bit [5:0] counter content: upper calibration temperature high calibration voltage, battery battery threshold low calibration voltage, battery ccnt2 cbh cbth cbl 6 4 2 0 14 12 10 8 22 20 18 16 30 28 26 24 adr=06h cbl ccnt2 cbth cbh 0 0
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 30 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 table 5.3 structure of block 07 for calibration dat a bit [31:24] bit [23:21] bit [20:11] bit [10:0] crc8 reserve = 0x00 ccnt3 ctemp3 6 4 2 0 14 12 10 8 22 20 18 16 30 28 26 24 adr=07h as requ. 0x00 or ctemp3 as required ccnt3 crc8 reserve =0x00 recommendation for representation of the absolute t emperature (ctempx) name bit(s) description absval 9:0 absolute temperature value ten times the absolute value of the temperature wit h 0c being 000 h 1lsb correspond to 0.2k; the binary transfer is tem p[c] 10 = ctempx sign 10 sign of the temperature required since temperature value is interpreted as centigrade 6 4 2 0 10 8 absval sign annotation : the measurement range is 102.3c (i.e. 7ff h ) to +102.3c (i.e. 3ff h ).
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 31 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 5.2. calibration principle the mathematical principle of the calibration is ob ject of this section. 5.2.1. two-point calibration the twopoint calibration is the favored principle for the ZMD41211. in general, a linear approximatio n of the respective measurement and reference values is achi eved by the twopoint calibration. 5.2.1.1. temperature measurement for the temperature, the twopoint calibration yiel ds a linearization precision of 1k. the following picture illustrates the general placement of the calibratio n points. latter have to be selected within the val id temperature range of 30c to +50c. the condition ctemp1 < ctemp2 must be fulfilled. figure 5.1 temperature calibration point location the linear approximation is realized via the follow ing calculations. the linear curve is represented b y: 2 1 k meascnt k temp + ? = with ? ?? ? ? ?? ? ? ? ?? ? ? ?? ? = ? ?? ? ? ?? ? ? 2 1 1 2 1 1 2 1 1 ctemp ctemp ccnt ccnt k k we obtain 1 2 1 2 1 ccnt ccnt ctemp ctemp k ? ? = and 1 2 1 2 2 1 2 ccnt ccnt ccnt ctemp ccnt ctemp k ? ? ? ? = . temp ctemp2 ctemp1 ccnt1 ccnt2 counter content: meascnt characteristic approximati on
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 32 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 the measurement temperature is defined as: 2 1 k meascnt k meastemp + ? = . the desired_temperature_limit leads the lower/upper temperature limit of the inte rnal counter being determined by: cntmin or cntmax = (desired_temperature_limit C k2) / k1 .
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 33 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 5.2.1.2. voltage measurement usually, during the chip selection on the wafer, fi xed voltage levels are defined for the later calibr ation. the counter contents cbh and cbl are determined for bat tery voltages of 1.5v and 1.1v, respectively and written to block 06 of the calibration data. figure 5.2 battery voltage calibration point locati on the linear approximation is realized via the follow ing calculations. the linear curve is represented b y: 2 1 k meascnt k vbat + ? = with ? ?? ? ? ?? ? ? ? ?? ? ? ?? ? = ? ?? ? ? ?? ? ? v v cbh cbl k k 5,1 1,1 1 1 2 1 1 we obtain cbl cbh v v k ? ? = 1,1 5,1 1 and cbl cbh cbl v cbh v k ? ? ? ? = 5,1 1,1 2 hence, the battery voltage can be determined as: 2 1 k messcnt k measvbat + ? = . vbat vb=1,5v vb=1,1v cbl cbh counter content: meascnt characteristic approximation
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 34 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 5.2.2. three-point calibration the threepoint calibration is more expensive regar ding measurements and calculations. nevertheless th e cubic approximation can improve the measurement pre cision to 0.5k within the range of 30c to +50c. figure 5.3 illustration of 3-point calibration the approximation function is 3 2 1 2 k messcnt k messcnt k temp + ? + ? = ) ( , whereas ? ? ?? ? ? ? ?? ? ? ? ? ?? ? ? ? ?? ? = ? ? ?? ? ? ? ?? ? ? 3 2 1 1 3 3 1 2 2 1 1 1 3 2 1 1 2 2 2 ccnt ccnt ccnt ctemp ctemp ctemp ctemp ctemp ctemp k k k leads to the respective constants k1 , k2 and k3 , which are determined by matrix operations. if a t hree point calibration shall be performed, the third cal ibration point will have to be stored in the block 07. temp ctemp3 ctemp2 ccnt1 ccnt2 counter content: meascnt charactersitic approximation ccnt3 ctemp1
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 35 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 5.3. cyclic redundancy check (crc) calculation for validation of calibration data a crc8 value of the calibration data block is gener ated and stored in the eeprom. the purpose is to ensure the data retention and thus consistence of t he calibration data by later checks. table 5.4 byte fragmentation of calibration blocks block byte 0 (d0) byte 1 (d1) byte 2 (d2) byte 3 (d3) 05 h ctemp1 ctemp1/2 ctemp2 ccnt1 06 h ccnt2 ccnt2/cbh cbth cbl 07 h 0x00 0x00 0x00 crc the eeprom data should be transferred to the crc ca lculating function as a bytearray of the form: b05(d0), b05(d1), b05(d2), b05(d3), b06(d0), b06(d1 ), b06(d2), b06(d3), b07(d0), b07(d1), b07(d2). the obtained 8bit wide crc8 value is written to b0 7(d3). the analyzing software reads out the respective blo cks. the bytes a processed according to the scheme presented above and compared to the crc8 checksum. if a match of both checksums is detected, the data will be valid. c-function for determination of crc8: unsigned char calculate_crc8( unsigned char * datapointer, unsigned char quantity) { unsigned char i, k, crc_rest; crc_rest = 0; // reset rest for (i = 0; i < quantity; i++) // loop for all bytes { crc_rest ^= datapointer[i]; // new byte xor for (k = 0; k <8; k++) // loop for all bits { if (crc_rest & 0x80) // if msb equals 1 { crc_rest <<= 1; // rest: 1. digit to the left crc_rest ^= 0x07; // x 8 +x 2 +x+1 => 0x07 } else crc_rest <<= 1; // rest: 1. digit to the left } } return crc_rest; } a crcfunction call would be e.g.: testvariable = calculate_crc8(data, 11);
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 36 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 5.4. calibration flow this section provides the detailed information abou t the possible calibration flows at the ZMD41211. 5.4.1. calibration via wireless communication the calibration via the rftransponder interface is especially advisable for recalibration of the fin ished label. the application must be ZMD41211 in combination wit h coil and battery (1.5v). the ics command pool includes a custom command (set cal) for overwriting the blocks which contain calibration data. (cp. command description) sturcture of set cal: kal_t1: kal_t data = block 05 h kal_t2: kal_t data = block 06 h kal_t3: kal_t data = block 07 h table 5.5 command format of set cal request format sof flags set cal ic mfg code (0x17) uid optional kal_t# kal_t crc16 eof 8 bits bc h 8 bits 64 bits 8 bits 32 bits 16 bits valid values for kal_t# are 1, 2 and 3. response format table 5.6 command response when error flag is set sof flags error code crc16 eof 8 bits 8btis 16 bits table 5.7 command response when error flag is not s et sof flags crc16 eof 8 bits 16bits
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 37 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 determination of ctemp to determine ctemp is very timeconsuming. via the rfinterface, it is only possible to retrieve the c ounter content with the ZMD41211 being in logging mode (da ta logger application). the logging mode 1 has to b e set, i.e. save any value, and the counter content o ver time is written into the eeprom. after the settling time of the temperature, the cou nter content has to be fetched by the isocommand: read multiple blocks. if the variation of the counter co ntent is less or equal 2 counts, then the pair of v alues: ccnt and ctemp can be stored with set cal into the respective eeprom block. figure 5.4 typical settling behaviour vsr3mp temperaturtest 8 @ -30c counter 0 200 400 600 800 1000 0 100 200 300 400 500 600 700 n x 30s temperaturcounter in n e017132a40014194 e017132a40014715 e017132a40014d06 e017132a40014e88 e017132a400150a2 e017132a40015120 e017132a400155a0 e017132a400186a4 e017132a4001881e e017132a40018824 vsr3mp temperature 8 @ -30c counter
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 38 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 5.4.2. calibration via i2c-interface for the i2c calibration, the ZMD41211 needs a 1.5v supply and the pads sifc, cifd and custom must be connected. the connection of a coil is not stringen tly required to realize the calibration via i2c. communication sequence is described in section 3.4. 5.4.2.1. ?temperature measurement unit activation sequence there is a dedicated sequence to activate the tempe rature measurement unit (tmu). the general steps are: reset C start C monitor readiness C result re quest via data bus. table 5.8 command sequence for temperature measurem ent unit (tmu) activation command name i2c command comments power_on power initialization w_cus_ready_tmu sof0xe4a0xcbaeof ready signal of tmu connectio n via custompad w_reset_tmu sof0xe4a0x27a0x02aeof tmu reset w_reset_return sof0xe4a0x27a0x00aeof return reset w_start_tmu sof0xe4a0x27a0x01aeof tmu starts o_rdy accept: rdy = 1 observe ready signal = high r_tmu_data sof0xe4a0x24a(eof) sof0xe5at2t1 at4t3eof set bus address 24 h , readout and saving of 10bit counter data evaluation t4t3t2t1 = 700 240 decimal t4t3t2t1=10bit temper ature counter data w_cus_off sof0xe4a0xc0aeof custom pad connecti on: off w_power_off sof0xe2a0x45aeof power off
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 39 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 5.4.2.2. writing parameter-eeprom sequence the parametereeprom must be filled with appropriat e measurement and reference data for calibration. therefore the following sequence must be used. (val id address range 0x00 0x0f) table 5.9 command sequence for writing parameter-ee prom command name i2c command comments power_on power initialization w_timerosc_off sof0xe4a0x6fa0x00aeof switch off clock p wait > 3 ms pause w_get_wire_rdy0 sof0xe4a0xc7aeof eeprom[0]rea dy at custom pad w_eep0_data sof0xe4a0x28abyte0abyte1abyte2abyte3 aadra0x02a0x01aeof write data: byte 0 3 to address adr into eeprom[0] p 18ms monitor rdy at custom pad (output rdy = lh) w_ eep0_dis sof0xe4a0x2da0x00a0x00aeof ce0 =we=0, eeprom[0] disable write new data to other address w_eep0_data sof0xe4a0x28abyte0abyte1abyte2abyte3 aother_adra0x02a0x01aeof write data: byte 03 to address other_adr into eeprom[0] w_ eep0_dis sof0xe4a0x2da0x00a0x00aeof ce0 =we=0, eeprom[0] disable disable_rdy sof0xe4a0xc0aeof deactivate monitoring after end of writing 5.4.2.3. readout parameter-eeprom sequence table 5.10 command sequence for parameter-eeprom re adout command name i2c command comments read from eeprom[0] valid address range 0x00 0 x0f w_eep0_adr sof0xe4a0x2caadra0x00a0x01aeo f create eepromadress, ce=oe=1, start readout at adr w_eep0_dis sof0xe4a0x2da0x04a0x01aeof set ce and oe w_eep0_dis sof0xe4a0x2da0x00a0x00aeof data takeover to bus r_data_out sof0xe4a0x28a(eof) sof0xe5abyte0abyte1abyte2abyte3eof set bus address, read block content: byte0123 w_power_off sof0xe2a0x45aeof power off
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 40 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 6 memory map the memory is organized in 256 blocks of 32 bit eac h. figure 6.1 eeprom overview C quasi-permanent data content parameter eeprom block (hex) byte0 byte1 byte2 byte3 00 01 iso 15693 uid iso data storage identifier 02 dsfid afi memory size field 03 timer trim parameter / chip revision 04 parameter temptimeproduct / custom blocks 05 06 07 calibration parameter for temperature and voltage 08 timer start time 09 timer preset time / log interval 0a log modes 0b log status bits 0c reserve 0d password 1 0e password 2 0f password 3 figure 6.2 eeprom overview C measurement data content user / temp-data eeprom block (hex) byte0 byte1 byte2 byte3 10 11 . user data region 10+cb measurement data 11+cb measurement data ff measurement data cb = number of custom blocks
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 41 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 7 pin configuration and package 7.1. pin configuration the package of the ZMD41211 is an ssop14 green pack age (5.3mm body width) with a lead pitch of 0.65 mm. figure 7.1 pin-out diagram
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 42 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 7.2. pin/pad description table 7.1 pin list pin name type description 1 coil1 hva coil pad 1: connects to one terminal of the external coil 2 n.c. not connected 3 test_vsup hva test pad for vsup 4 n.c. not connected 5 coil2 hva coil pad 2: connects to the other termi nal of the external coil 6 n.c. not connected 7 vss negative / reference supply voltage / power connect 8 custom d_o sclk: serial clock 9 n.c. not connected 10 sifd open drain io sensorinterface: i2c data 11 n.c. not connected 12 sifc open drain io sensorinterface: i2c clock 13 n.c. not connected 14 vbat vdd positive supply voltage / power, connec t for data logging vpp1 test pad for internal usereeprom charge pump (progr. voltage 12v) vpp2 no esd diode, only for test test pad for internal parametereeprom charge pump (progr. volt. 12v) explanation of pin type: hva: high voltage analog pad with esd diode to vs s vdd: power supply pad with esd diode to vss d_o: tristate digital output with esd diode to vss and vbat open drain io: open drain bidirectional pad with es d diode to vss
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 43 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 7.3. chip layout figure 7.2 chip layout vbat sifc coil 1 sifd vpp1 vpp2 vss coil 2 custom testvsup y-dir = 2.9mm x-dir = 3.1mm position on wafer: rotate 90 o left chip grid (incl. scribeline): x=3.23mm y = 3,03mm scribeline with: 80um pad size: (74 x 74) um
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 44 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 8 application notes 8.1. connection of external sensor figure 8.1 shows examples for the connection of sen sors (with supply in the range: 2.7v to 3.3v) to th e ZMD41211. if no external sensor was connected to th e ZMD41211, it is recommended to connect sifc and sifd to v ss . in the figure on the right hand side, the lamp is a substitute for any signalling annunciator. however, the continuous load current has to be less than 1 ma. figure 8.1 schematic with sensor (left) and with an nunciator (right) 8.2. antenna layout a potential layout of the antenna coil (connected t o coil1 and coil2) is shown in figure 8.2. four or five turns are recommended depending on the distributed capaci tance. for the shown antenna layout, if turn 5 is n ot required, it will remain open. the red line represe nts the connection crossover and can be place on th e backside of the label. the label dimensions would b e 78mm by 48mm. figure 8.2 antenna layout example
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 45 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 9 additional documents document file name ZMD41211 command description ZMD41211_commanddescri ption_rev_1p0.pdf visit zmds website www.zmd.biz or contact your nearest sales office for the lates t version of these documents.
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 46 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 10 glossary term description ask amplitude shift keying afi application family identifier cb custom block ccnt calibration counter crc cyclic redundancy check dsfid data storage format identifier eof end of frame fsk frequency shift keying iso international standard organization lsb least significant bit msb most significant bit rf radio frequency sof start of frame ttp temperature time product uid unique identifier
data sheet C preliminary outline iso 15693 wireless tag ic with integrated temperature sensor ? 2008 zmd ag rev. 0.7 all rights reserved. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior writt en consent of the copyright owner. the information furnished in this publication is prelim inary and subject to changes without notice. 47 / 47 zmd4121 1 data sheet rev. 0.7 september 2008 11 document revision history revision date description 0.5 august 12 th , 2008 preliminary outline 0.7 september 30 th , 2008 incorporation of commands and detailed descr iptions sales offices and further information www.zmd.biz zmd ag grenzstrasse 28 01109 dresden, germany phone +49 (0)351.8822.7.772 fax +49 (0)351.8822.87.772 sales@zmd.de zmd america, inc. 201 old country road, suite 204 melville, ny 11747, usa phone +01 (631) 5492666 fax +01 (631) 5492882 sales@zmda.com zmd far east 1f, no.14, lane 268 sec. 1 guangfu road hsinchu city 300, taiwan phone +886.3.563.1388 fax +886.3.563.6385 sales@zmd.de

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