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RFID TAG CHIPS AND TAGS REFRAINING FROM PARTICIPATING IN A SUBSEQUENT INVENTORYING ATTEMPT AND METHODS

  • US 20080258916A1
  • Filed: 03/28/2008
  • Published: 10/23/2008
  • Est. Priority Date: 03/29/2007
  • Status: Active Grant
First Claim
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1. An Integrated Circuit (IC) chip for use with a Radio Frequency Identification (RFID) tag having an antenna, comprising:

  • a memory for storing a code, an inventoried flag capable of being flipped between two states, and an inventoried indicator; and

    a processing block for coupling with the antenna and operable to;

    detect a first attempt to read the code, the first attempt agreeing with a current state of the inventoried flag,cause the code to be backscattered responsive to the first attempt,update the inventoried indicator in conjunction with causing the code to be backscattered,one of;

    flip and not flip the state of the inventoried flag responsive to the first attempt,then detect a second attempt to read the code, the second attempt agreeing with a current state of the inventoried flag, andcause the code to be backscattered responsive to the second attempt if the updated inventoried indicator meets a participation condition, else not causing the code to be backscattered.

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