i ntegrated c ircuits d ivision ds-NCD1015ZP-r02 www.ixysic.com 1 features ? reliable half-duplex (hdx) low frequency (lf) communications format ? 64 bits for data / identification storage ? 134.2 khz operating frequency ? fsk modulation ? energy harvesting battery-free wireless power ? 16 bit crc error detection code generator ? 10 year data retention applications ? inventory management ? ingress/egress discovery ? real-time container tracking ? manufacturing production flow control ? vehicle identification ? security access administration ? high value asset monitoring description the NCD1015ZP is a passive 50mm cylindrical low frequency half-duplex read-only radio frequency identification (rfid) transponder that operates at a resonant frequency of 134.2khz. with 64-bits of pre-programmed identification data storage and a 16-bit crc error checking code generator, the transponder supports iso 11784 and iso 11785 standards. using the power acquired from harvesting the rf energy transmitted by the rfid reader, the passive transponder responds by sending out a 128-bit packet that contains the stored 64-bit data, a 16-bit crc-ccitt error checking code, and the overhead bits necessary to ensure transmission recognition. transmission of the digital data from the transponder to the reader utilizes an fsk modulation technique where a logic 0 is represented by a 16 cycle burst of 134.2 khz while a logic 1 uses 124.2 khz. ordering information block diagram part # description NCD1015ZP 50mm hdx rfid 64-bit data transponder, pre-programmed identification code bit 1 = 0 :: non-animal bits 2 - 16 = 0x0000 bits 17 - 26 = 0x3d2 (978 d ) bits 27 - 64 :: unique identification code - value will be incremented at the factory to provide a unique code for each device. maximum number of unique values = 2 38 - 1 = 0x3fffffffff (id code = 0 not used) NCD1015ZPc 50mm hdx rfid 64-bit data transponder, custom programmed identification code: contact the factory. ncd1015 charge storage capacitor antenna NCD1015ZP 50mm half duplex read-only rfid transponder
i ntegrated c ircuits d ivision NCD1015ZP 2 www.ixysic.com r02 1. specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. functional overview and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 power transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 communication interface - tag to reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3.1 data bit structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3.2 transponder data rate and data coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3.3 completion of transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.4 transmission protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4.1 transponder - response data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4.2 crc - ccitt error checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 dimensions and material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 water resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.3 mechanical shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.4 thermal stress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
i ntegrated c ircuits d ivision NCD1015ZP r02 www.ixysic.com 3 1. specifications 1.1 operating conditions 1.2 electrical specifications unless otherwise specified, minimum and maximum values are guaranteed by production testing or design. typical values are characteristic of the device at 25c, and are the result of engineering evaluations. they are provided for informational purposes only and are not guaranteed by production testing. parameter minimum maximum unit operating temperature, t a -20 +60 ? c storage temperature, t stg -40 +60 ? c parameter conditions symbol minimum typical maximum unit charging duration required for transmission 15 50 - ms low bit frequency t a = 25c f 0 133.6 134.2 134.8 khz -20c < t a < 60c 132.2 - 136.2 high bit frequency t a = 25c f 1 123.3 124.2 125.8 khz -20c < t a < 60c 122.0 - 126.5 data retention 10 - - years
i ntegrated c ircuits d ivision NCD1015ZP 4 www.ixysic.com r02 2. functional overvi ew and description 2.1 overview the reader and the pre-programmed NCD1015ZP transponder comprise the two elements of a half-duplex wireless communications system operating in a sequential mode with time-separated power and data transmission cycles. power transfer to the transponder (tag) is accomplished by electromagnetic coupling of the transponder and reader antennae. 2.2 power transfer as shown below in figure 1, an activation field sourced by the reader supplies power to the transponder at the beginning of a read request. the reader generates an electromagnetic field for 50 ms using an activation frequency of 134.2 khz to energize the resonant circuit of the transponder. during this powering phase, circuitry within the transponder rectifies the induced voltage to charge an internal storage capacitor. energy held by the storage capacitor provides the means by which the transponder transmits it?s stored data. the reader terminates the activation field to indicate it is ready to receive data from the transponder. figure 1: activation and read phases: voltage at the reader?s exciter and transponder coils 2.3 communication interface - tag to reader frequency shift keying (fsk) modulation is employed by the NCD1015ZP to transmit the stored data immediately after detecting the end of the reader?s activation field. as can be seen in figure 1, the tag?s transmit (response phase) directly follows the powering phase. transfer of the stored digital information is accomplished by using two discrete frequencies, one for a logic ?1? (high) and another for a logic ?0? (low). the nominal frequencies used for data transmission are: ? f 1 = 124.2khz is for logic high data encoding ? f 0 = 134.2khz is for logic low data encoding 2.3.1 data bit structure data bits are transmitted as 16 cycles of their respective frequency. because a logic high (1) data bit uses a lower frequency than that for a logic low (0), the duration of a 1 bit is longer than a 0 bit. the duration for logic 1 and logic 0 bits is given below. ? t d1 = 16/f 1 = 16/124.2khz = 128.8us ? t d0 = 16/f 0 = 16/134.2khz = 119.2us figure 2 illustrates the fsk encoding principle used to transmit the stored data. figure 2: fsk transmission used during the read phase 2.3.2 transponder data rate and data coding the data coding is based on the nrz method thus achieving an average data rate of ~8kbit/s based on an equal distribution of '0' and '1' data bits. 2.3.3 completion of transmission following the output of the last bit, the transponder deactivates.
i ntegrated c ircuits d ivision NCD1015ZP r02 www.ixysic.com 5 2.4 transmission protocol 2.4.1 transponder - response data format an rfid answer by the NCD1015ZP contains a header, the identification data, a crc value, and a tr a i l e r. framed as shown below in figure 3 the transmitted signal has a fixed length of 128 bits. the header consists of a16-bit pre-bits leader followed by an 8-bit start byte. following the crc error checking value is the trailer consisting of an 8-bit stop byte followed by the 16-bit post. depending on the value of the sixteenth data bit, logical data address [48], the stop byte value changes. when the identification data stored in the ncd1050zp complies with iso 11784, data bit 16 as defined in iso 11784 will be 0 and the stop byte value will be 0x7e. for identificat ion data not compliant with iso 11784 the stop byte value will be determined by the value stored in the sixteenth bit of the data. the data, crc, stop and post data will be transmitted starting with the lsb and ending with the msb. figure 3: tag response frame format all signals are coded [msb:lsb]. ? pre-bits [15:0] . . . = 0x0000 ? start byte [7:0] . . = 0x7e ? data [63:0] . . . . . = data ? crc [15:0] . . . . . = data crc ? stop byte [7:0] . . = 0x7e - data bit 16 = 0 ? ? stop byte [7:0] . . = 0x1e - data bit 16 = 1 ? ? post bits [15:0] . . = 0x0000 ? data bit position as defined in iso 11784 2.4.2 crc - ccitt error checking the crc generator circuitry creates a 16 bit crc to ensure the integrity of the data packets received by the transponder. the reader and transponder use the crc-ccitt (consultative committee for international telegraph and telephone) algorithm for error detection. the 16-bit cyclic redundancy code is calculated using the following polynomial: p(x) = x 16 + x 12 + x 5 + x 0 the implemented version of the crc check has the following characteristics: ? reverse crc-ccitt 16 as described in iso/iec 13239 and used in iso/iec 11784/11785. ? the crc 16-bit shift register is initialized to all zeros (0x0000). ? the incoming data bits are xor-ed with the msb of the crc register and is shifted into the register's lsb. ? after all data bits have been processed, the crc register contains the crc-16 code. ? reversibility - the original data, together with associated crc, when fed back into the same crc generator will regenerate the initial value (all zero's). figure 4: schematic diagram of the 16-bit crc-ccitt generator pre-bits start data crc stop post 1 16 17 24 25 88 89 (lsb) 104 105 112 113 128 p (x) = x0x1x2x3x4 x5x6x7x8x9x10x11 x12x13x14x15 msb data in lsb
i ntegrated c ircuits d ivision NCD1015ZP 6 www.ixysic.com r02 3. mechanical data 3.1 dimensions and material 3.2 water resistance water ip67. no frequency shift after 1 hour at 20oc under 1 meter of water. 3.3 mechanical shock drop test (qualified by similarity) 10 times at 30cm (both orientations) 3.4 thermal stress temperature cycling: 500 times 70c ? -25c ? 70c. transition time: 30 minutes dwell time at 70c: 60 minutes) dwell time at -25c: 60 minutes). parameter min typ max unit length 51.8 52.3 52.8 mm diameter 16.5 17 17.5 mm case material pa66gf and epoxy specifications: ds-NCD1015ZP-r02 ? copyright 2015, ixys integrated circuits division all rights reserved. printed in usa. 12/18/2015 for additional information please visit www.ixysic.com ixys integrated circuits division makes no representations or warranties with respect to the accuracy or completeness of the co ntents of this publication and reserves the right to make changes to specifications and product descriptions at any time without notice. neither circuit patent licenses nor indemnity ar e expressed or implied. except as set forth in ixys integrated circuits division?s standard terms and condit ions of sale, ixys integrated circuits division assumes no liability whatsoever, a nd disclaims any express or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringem ent of any intellectual property right. the products described in this document are not designed, intended, authorized or warranted for use as components in systems in tended for surgical implant into the body, or in other applications intended to support or sustain life, or where malfunction of ixys integrated circuits division?s product may resul t in direct physical harm, injury, or death to a person or severe property or environmental damage. ixys integrated circuits divisi on reserves the right to discontinue or make changes to its pr oducts at any time without notice.
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