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US 8,044,774 B1Granted
RFID tag chips and tags able to be partially killed and methods
AssigneeImpinj, Inc.
InventorChristopher J. Diorio
Life of this patent
Estimating the term…
Abstract
RFID tag circuits, tags, and methods are provided for receiving a partial-kill command. In response to receiving such a command, the tag circuit or tag becomes partially killed. This means that one or more but not all of its memory functions become disabled.
Claims43
An RFID tag comprising a memory, the tag configured to at least:
- receive an initial command;
- respond to the initial command by employing a first memory function associated with at least a portion of the memory;
- receive a first command;
- set a first protocol-related bit in the memory in response to the first command;
- disable the first memory function in response to receiving the first command, the tag still being able backscatter an operating reply in response to an operating request received thereafter;
- backscatter a status reply generated also from the set first protocol-related bit to indicate that the first memory function has been disabled;
- receive an interim command;
- respond to the interim command by employing a second memory function associated with at least a second portion of the memory;
- set a second protocol-related bit in response to the first command;
- disable also the second memory function in response to receiving the first command, the tag still being able backscatter the operating reply in response to an operating request received thereafter;
- and
- in which the status reply is generated also from the set second protocol-related bit to indicate that also the second memory function has been disabled.
9 more elements
A method for an RFID tag having a memory, comprising:
- receiving an initial command;
- responding to the initial command by employing a first memory function associated with at least a portion of the memory;
- receiving a first command;
- setting a first protocol-related bit in the memory in response to the first command;
- disabling the first memory function in response to receiving the first command, the tag still being able backscatter an operating reply in response to an operating request received thereafter;
- backscattering a status reply generated also from the set first protocol-related bit to indicate that the first memory function has been disabled;
- receiving an interim command;
- responding to the interim command by employing a second memory function associated with at least a second portion of the memory;
- setting a second protocol-related bit in response to the first command;
- disabling also the second memory function in response to receiving the first command, the tag still being able backscatter the operating reply in response to an operating request received thereafter;
- and
- in which the status reply is generated also from the set second protocol-related bit to indicate that also the second memory function has been disabled.
9 more elements
An RFID tag comprising a memory and a processor, the processor configured to at least:
- receive an initial command;
- respond to the initial command by employing a first memory function associated with at least a portion of the memory;
- receive a first command;
- set a first protocol-related bit in the memory in response to the first command;
- disable the first memory function in response to receiving the first command, the tag still being able backscatter an operating reply in response to an operating request received thereafter;
- backscatter a status reply generated also from the set first protocol-related bit to indicate that the first memory function has been disabled;
- receive an interim command;
- respond to the interim command by employing a second memory function associated with at least a second portion of the memory;
- receive a second command;
- set a second protocol-related bit in response to the second command;
- disable the second memory function in response to receiving the second command, the tag still being able backscatter the operating reply in response to an operating request received thereafter;
- and
- backscatter a second status reply generated also from the set second protocol-related bit to indicate that the second memory function has been disabled.
10 more elements
A method for an RFID tag having a memory and a processor, the method comprising:
- receiving an initial command;
- responding to the initial command by employing a first memory function associated with at least a portion of the memory;
- receiving a first command;
- setting a first protocol-related bit in the memory in response to the first command;
- disabling the first memory function in response to receiving the first command, the tag still being able backscatter an operating reply in response to an operating request received thereafter;
- backscattering a status reply generated also from the set first protocol-related bit to indicate that the first memory function has been disabled;
- receiving an interim command;
- responding to the interim command by employing a second memory function associated with at least a second portion of the memory;
- receiving a second command;
- setting a second protocol-related bit in response to the second command;
- disabling the second memory function in response to receiving the second command, the tag still being able backscatter the operating reply in response to an operating request received thereafter;
- and
- backscattering a second status reply generated also from the set second protocol-related bit to indicate that the second memory function has been disabled.
10 more elements
Dependencies are inferred from the claim text.