Patent ID: 7119664

Claim:
A passive radio frequency identification tag comprising: an antenna; a radio frequency interface coupled with the antenna; and control logic that initiates a deep sleep state in response to an event, the deep sleep state comprising non-responsive state that is independent of supplied power, and the control logic providing a following slate entered upon conclusion of the non-responsive state, wherein communications initiate from the following state, wherein the following state comprises an initial communication state from a plurality of communication states, wherein the plurality of communication states allow response to a sequence of associated commands when receipt of the command sequence begins in the initial communication state; wherein the deep sleep state initiates in response to an event comprising receipt of a deep sleep command; wherein the non-responsive state concludes in response to a first occurring event from events comprising receipt of a wake command and internal cessation of the non-responsive state; and where the control logic further provides a sleep state that is entered upon power up and an isolate state that is entered upon receipt of an isolate command, the sleep and isolate states being dependent upon supplied power, wherein the sleep, isolate and non-responsive states conclude upon receipt of a full wake command, and the sleep and isolate states, but not the non-responsive state, conclude upon receipt of a partial wake command.