Patent ID: 8446258

Claim:
A Radio Frequency Identification (RFID) system, comprising: at least one tag including: a counter configured to adjust its count value in response to reader commands; and a processing block operable to: receive an Enable command; in response to the Enable command, enable the counter to start counting; receive a Reset command; in response to the Reset command, perform one of: set the counter to a preset count value, and modify an amount by which the counter is adjusted; receive a first command; if a counter has not yet reached a predefined limit then: comply with the first command, and adjust the counter by a first adjustment amount; if the counter has reached the predefined limit, then: not comply with the first command, and backscatter an Out_Of_Cycles reply; receive a second command; if the counter has not yet reached the predefined limit then: comply with the second command, and adjust the counter by a second adjustment amount, wherein the second adjustment amount is different from the first adjustment amount; if the counter has reached the predefined limit, then: not comply with the second command, and backscatter an Out_Of_Cycles reply; disable the counter in response to receiving a Disable command; and a reader operable to transmit the Enable, the Reset, and the Disable commands to the tag.