Non-contact IC recording medium
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United States of America Patent
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Oct 4, 1994
Grant Date -
N/A
app pub date -
Jun 4, 1991
filing date -
Jun 5, 1990
priority date (Note) -
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Abstract
An IC recording medium for executing data transmission/reception without contact with a reader/writer. The non-contact IC recording medium comprises a first circuit for detecting a synchronization (sync) signal sent from a reader/writer to generate a first clock signal, a second circuit for generating a second clock signal having a predetermined frequency relationship with the clock signal for driving the data processing in a signal processing circuit incorporated therein, a third circuit for writing m (where m is an integer of 2 of greater) number items of transfer information output from the signal processing circuit using the second clock signal and reading them using the first clock signal, a fourth circuit for creating an interruption signal from the start bit in at least the first transfer information in the m number of items of transfer information to place the subsequent m number of items of transfer information in a wait state, and a fifth circuit for releasing the wait state of the subsequent m number of items of information by the fourth means.
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