april 2016 docid029206 rev 1 1/10 1 UM2053 user manual 14 mm x 14 mm antenna reference board for the m24sr64-y dual interface eeprom introduction the ant7-t-m24sr64 is a ready-to-use demonstration board intended to evaluate the m24sr64-y dual interface electrically erasable programmable memory (eeprom), a device featuring an i2c interface that can be operated from an external power supply. the m24sr64-y is a contactless memory, powered by the received carrier electromagnetic field. the board (see figure 1 ) features: ? m24sr64-y dual interface eeprom ? 14 mm x 14 mm, 13.56 mhz dual layer etched antenna ? i2c test points ? configurable general purpose output (gpo) to indicate an ongoing rf or i2c operation available on test point ? rf disable test point (dis) for acti vation/deactivation of rf commands figure 1. ant7-t-m24sr64 board www.st.com
contents UM2053 2/10 docid029206 rev 1 contents 1 hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 using rf disable (dis) pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3 using general purpose output (gpo) pin . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.4 using i2c pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 component description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 m24sr64-y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 federal communications commission (fcc) and industry canada (ic) compliance statements . . . . . . . . . . . . . . . . . . . . . 8 4.1 fcc compliance statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.1.1 part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.1.2 part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.1.3 part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2 formal notices required by the industry canada (?ic?) . . . . . . . . . . . . . . . 8 4.2.1 compliance statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2.2 declaration de conformit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
docid029206 rev 1 3/10 UM2053 list of tables 3 list of tables table 1. m24sr64-y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 2. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
list of figures UM2053 4/10 docid029206 rev 1 list of figures figure 1. ant7-t-m24sr64 board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 figure 2. functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 3. ant7-t-m24sr64 hardware schemat ics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
docid029206 rev 1 5/10 UM2053 hardware description 9 1 hardware description the ant7-t-m24sr64 (see figure 2 ) contains the m24sr64-y eeprom device and a 14 mm x 14 mm, 13.56 mhz dual layer etched antenna. figure 2. functional block diagram the m24sr64-y is a dynamic nfc forum type 4 tag ? iso/iec 14443 with 25 pf internal tuning capacitance. memory size is 64 kbits with ndef support, that can be accessed either by i2c interface or by 13.56 mhz air interface. the tag features a user configurable digital output pin toggling during either rf or i2c operation. the m24sr64-y also provides an input used to disable the rf communication. as shown in figure 1 , all m24sr64-y pins (except ac0 and ac1, related to antenna connection) are made available to the user, with 1.2 mm diameter through-hole test points. 1.1 startup the ant7-t-m24sr64 is already programmed with an uri that w ill automatically redirect to the associated st web-page. user has to: ? enable nfc on the phone (settings wireless and networks nfc) and make sure it is also connected to the internet ? bring the phone close to the ant7-t-m24sr64 antenna to be redirected to the st25 web-page. various usages of the ant7-t-m24sr64 with a smartphone are allowed with st25 nfc demo application for android. to download the application and for more use cases details user should visit the dedicated pages on https://play.google.com and on www.st.com . it is also possible to access the m24sr64-y memory with cr95hf demonstration board and associated pc software available on www.st.com . 0 6 9 p p ; p p $ q w h q q d o r r s 9 & & * 1 ' ' , 6 * 3 2 6 ' $ 0 6 5 < 6 & /
hardware description UM2053 6/10 docid029206 rev 1 1.2 using rf disable (dis) pin this active high signal is used to disable the rf communication. when the voltage on the vcc pin is below t he por level or not connected, an internal pull-down resistor is connected on this pad. thus, the rf disable pad is maintained to the low level and the rf analog front end is acti vated. when the voltage on the vcc pin is higher than the por level, the i2c host shall set this pin to disable the rf communication. in dual interface mode, the dis pin must not be left floating. 1.3 using general purp ose output (gpo) pin this configurable output signal is used either to indicate that the m24sr64-y is executing an i2c or rf session in the mode chosen by the user. it is an open drain output and a pull-up resistor (20 k ? ) must be connected between gpo and vcc pins. this digital output pin is easily accessible to the user on the gpo test point. 1.4 using i2c pins the memory is accessible thro ugh i2c when it is powered by the vcc pin. i2c clock and data signals are respectively available on sc l and sda test points. since i2c is an open drain interface, pull up resistors have to be connected from both lines to vcc pin.
docid029206 rev 1 7/10 UM2053 component description 9 2 component description 2.1 m24sr64-y the m24sr64-y device is a dynamic nfc/rfid tag ic with a dual interface, electrically erasable programmable memory (eeprom). it features an i2c interface and can be operated from a v cc power supply. it is also a contactless memory powered by the received carrier electromagnetic field. 3 schematics figure 3. ant7-t-m24sr64 hardware schematics table 1. m24sr64-y feature description sales type m24sr64-ymn6 package so8n operating voltage 2.7 to 5.5 volts 1 2 3 4 j1 22-29-2041-nc rf dis 1 vss 4 gpo 7 ac1 3 ac0 2 vcc 8 scl 6 sda 5 u1 m24sr64-ymn6t/2 rfdis 1.2mm gpo 1.2mm gnd gnd antenna scl sda vcc rf_dis gpo c1 nc c2 nc gnd gnd i antenne
federal communications commission (fcc) and industry canada (ic) compliance statements 8/10 docid029206 rev 1 4 federal communications commission (fcc) and industry canada (ic) compliance statements 4.1 fcc compliance statement 4.1.1 part 15.19 this device complies with part 15 of the fcc rules. operation is su bject to the following two conditions: (1) this device may not cause ha rmful interferen ce, and (2) this device must accept any interference received, including interference that may cause undesired operation. 4.1.2 part 15.105 this equipment has been tested and found to comply with the limits for a class a digital device, pursuant to part 15 of the fcc rules. these limits are designed to provide reasonable protection against harmful interfer ence when the equipment is operated in a commercial environment. this equipment gener ates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. 4.1.3 part 15.21 any changes or modifications to this equipment not expressly approved by stmicroelectronics may cause harmful interferen ce and void the user?s authority to operate this equipment 4.2 formal notices required by the industry canada (?ic?) 4.2.1 compliance statement this device complies with industry canada lic ence-exempt rss standard(s). operation is subject to the following two cond itions : (1) this device may not cause interference, and (2) this device must accept any interference, in cluding interference that may cause undesired operation. 4.2.2 declaration de conformit le prsent appareil est conforme aux cnr d? industrie canad a applicables aux appareils radio exempts de licence. l?exploitation est autorise aux deux conditions suivantes : (1) l?appareil ne doit pas produire de brouillage, et (2) l?ut ilisateur de l?appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susce ptible d?en co mpromettre le fonctionnement.
docid029206 rev 1 9/10 UM2053 revision history 9 5 revision history table 2. document revision history date revision changes 21-apr-2016 1 initial release.
UM2053 10/10 docid029206 rev 1 important notice ? please read carefully stmicroelectronics nv and its subsidiaries (?st?) reserve the right to make changes, corrections, enhancements, modifications, and improvements to st products and/or to this document at any time without notice. purchasers should obtain the latest relevant in formation on st products before placing orders. st products are sold pursuant to st?s terms and conditions of sale in place at the time of o rder acknowledgement. purchasers are solely responsible for the choice, selection, and use of st products and st assumes no liability for application assistance or the design of purchasers? products. no license, express or implied, to any intellectual property right is granted by st herein. resale of st products with provisions different from the information set forth herein shall void any warranty granted by st for such product. st and the st logo are trademarks of st. all other product or service names are the property of their respective owners. information in this document supersedes and replaces information previously supplied in any prior versions of this document. ? 2016 stmicroelectronics ? all rights reserved
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