Non-contact IC recording medium

Details Non-contact IC recording medium Non-contact IC recording medium

1991-06-04

1994-10-04

Shaw, Dale M.

G06K 700

Patent

active

053534344

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.

REFERENCES:
patent: 4720626 (1988-01-01), Nishikawa et al.
patent: 4888585 (1989-12-01), Kamiya et al.
patent: 5113184 (1992-05-01), Katayama
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