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april 2010 doc id 17392 rev 1 1/12 TN0280 technical note migrating from the lri2 k to the lri1k rfid ic introduction the purpose of this document is to give an overview of the features implemented in the lri2k and the lri1k, and highlight their differences in order to help customers to switch from lri2k to lri1k in their application. www.st.com
contents TN0280 2/12 doc id 17392 rev 1 contents 1 rf interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 built-in tuning capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 rf commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 get system info command differences . . . . . . . . . . . . . . . . . . . . . . . 8 6 die description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 delivery form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
TN0280 list of tables doc id 17392 rev 1 3/12 list of tables table 1. iso 15693 rf interface modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 table 2. internal tuning capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 table 3. memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 4. rf commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 5. difference betw een lri2k and lri1k answer to get system info . . . . . . . . . . . . . . . . 8 table 6. delivery form. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 7. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
rf interface TN0280 4/12 doc id 17392 rev 1 1 rf interface both lri2k and lri1k support all data rates and modulation defined in the iso 15693 standard. table 1. iso 15693 rf interface modes modulation and data transfer lri2k lri1k 10% / 100% modulation both both 1/4 and 1/256 pulse coding both both manchester coding 1 sub carrier/ 2 subcarrier both both high datarate / low datarate 6.6 kbit / 26 kbit/s 6.6 kbit / 26 kbit/s
TN0280 built-in tuning capacitor doc id 17392 rev 1 5/12 2 built-in tuning capacitor ta bl e 2 summarizes the built in tuning capacitor value available for lri2k and lri1k. customers using lri2k in 21pf version can use lri1k as a direct replacement without needing to retune their antenna. for customers using any other lri2k tuning capacitor version, a redesign of the antenna will be necessary to restore th e desired tuning frequency. table 2. internal tuning capacitor parameter lri2k lri1k internal tuning capacitor value 21 pf, 23.5 pf, 28.5 pf or 97 pf 21 pf
memory mapping TN0280 6/12 doc id 17392 rev 1 3 memory mapping ta bl e 3 summarizes the memory mapping information for lri2k and lri1k. table 3. memory mapping features lri2k lri1k uid 64 bits 64 bits memory size 2048 bits 1024 bits block size 32 bits 32 bits memory array last address 3fh 1fh rf programming time t w including verify 5.8 ms 5.8 ms erase/write cycles 1 million 1 million
TN0280 rf commands supported doc id 17392 rev 1 7/12 4 rf commands supported lri2k and lri1k support the same command set. table 4. rf commands command lri2k lri1k inventory yes yes stay quiet yes yes read single block yes yes write single block yes yes lock block yes yes read multiple block up to 64 blocks up to 32 blocks select yes yes reset to ready yes yes write afi yes yes lock afi yes yes write dsfid yes yes lock dsfid yes yes get system info see section 5 see section 5 get multiple block security status up to 64 blocks up to 32 blocks (1) 1. see lri1k datasheet for a description of get multiple block security status kill yes yes write kill yes yes lock kill yes yes fast read single block yes yes fast read multiple block up to 64 blocks with roll over up to 32 blocks with roll over fast inventory initiated yes yes inventory initiated yes yes initiate yes yes fast initiate yes yes
get system info command differences TN0280 8/12 doc id 17392 rev 1 5 get system info command differences table 5. difference between lri2k and lri1k answer to get system info parameter lri2k lri1k memory size 033fh 031fh ic reference (6 most significant bits) 00 100b = 08h 01 0000b = 16d
TN0280 die description doc id 17392 rev 1 9/12 6 die description as described in the technical notes tn0052 lri2k die description and tn0252 lri1k die description , the wafer, die features, pad number and pad positioning are identical for lri2k and lri1k. as a consequence, lri1k can be used as a di rect replacement for lri2k regarding the design of the antenna connections. however, you must pay attention to the value of the lri2k tuning capacitor used in the application (see section 2 ).
delivery form TN0280 10/12 doc id 17392 rev 1 7 delivery form ta bl e 6 summarizes the available delivery forms for lri2k and lri1k. lri1k is delivered only in sawn and bumped wafers. table 6. delivery form delivery form lri2k lri1k unsawn wafer yes 180 m sawn and bumped wafer yes yes mlp 2x3 yes
TN0280 revision history doc id 17392 rev 1 11/12 8 revision history table 7. document revision history date revision changes 24-apr-2010 1 initial release.
TN0280 12/12 doc id 17392 rev 1 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2010 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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