초록 ▼

A method of sending data from a base station to a passive RF tag and writing the data to a tag non-volatile memory which detects a "partial write", where the tag voltage falls during the write process under the voltage sufficient to reliably write the tag non-volatile memory, is presented. The tag v

A method of sending data from a base station to a passive RF tag and writing the data to a tag non-volatile memory which detects a "partial write", where the tag voltage falls during the write process under the voltage sufficient to reliably write the tag non-volatile memory, is presented. The tag voltage is compared to a stable reference voltage during the time the tag memory is being written, and if the tag voltage falls below an acceptable level, a flag in the tag non-volatile memory is cleared.

대표청구항 ▼

[ We claim:] [1.]1. A method of writing data to a passive RF tag non-volatile memory, comprising;a) writing a signal to a tag volatile memory, the signal indicative that a tag supply voltage is sufficient to write the data to the tag non-volatile memory, the signal written before the data is written

[ We claim:] [1.]1. A method of writing data to a passive RF tag non-volatile memory, comprising;a) writing a signal to a tag volatile memory, the signal indicative that a tag supply voltage is sufficient to write the data to the tag non-volatile memory, the signal written before the data is written to the tag non-volatile memory; thenb) changing the signal if the tag voltage becomes insufficient to write the data to the tag non-volatile memory during the time that the data is written to the tag non-volatile memory,wherein the signal is also changed to indicate that the tag voltage was insufficient each time that tag powers up from a state where the tag voltage was insufficient to run the tag electronics.