Id system and method of writing data in an id system

Details Id system and method of writing data in an id system Id system and method of writing data in an id system

G - Physics

06

K

354/33

G06K 19/06 (2006.01) G06K 7/00 (2006.01) G06K 19/07 (2006.01)

Patent

CA 1286405

ABSTRACT OF THE DISCLOSURE An ID system includes a data carrier attached to an article to be identified, and an ID controller capable of communicating with the data carrier. The data carrier is provided with first and second data buffers in addition to a readable/writable memory. Data to be written in the memory is temporarily written in the first data buffer. Old data at a location of the memory in which the aforementioned data is to be written is read out of the memory and temporarily stored in the second data buffer. Thereafter, the data in the first data buffer is written in the memory. In order to check whether the data has been written in the memory correctly, the written data is read out of the memory. In the event that a write error is detected in the checking operation, the old data of memory will have been preserved in the second data buffer, thereby enabling recovery of the old data.

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