Circuit for detecting and formatting data frames

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system

Reexamination Certificate

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C710S030000, C370S506000

Reexamination Certificate

active

07003407

ABSTRACT:
The invention concerns non-contact smart cards and, more particularly in such cards, a circuit for detecting data frames and providing them with a parallel format for their processing. The invention is characterised in that it consists in using the information contained in the first octets of the frame being currently received, thereby enabling to identify them as they are received and route them into registers (80). This is provided by a state machine (60) whereof the shift from one state to the other is switched by the circuitry (62, 76) output signals.

REFERENCES:
patent: 4896133 (1990-01-01), Methvin et al.
patent: 6003151 (1999-12-01), Chuang
patent: 6091530 (2000-07-01), Duckworth
patent: 6189087 (2001-02-01), Witt et al.
patent: 6222757 (2001-04-01), Rau et al.
patent: 6667993 (2003-12-01), Lippett et al.
patent: 6711181 (2004-03-01), Xue et al.
patent: 6735198 (2004-05-01), Edsall et al.
patent: 6738392 (2004-05-01), Thurston
patent: 2 772 534 (1999-06-01), None
patent: WO9921129 (1999-04-01), None
French Preliminary Examination Report dated Jul. 19, 2001 for PCT/FR00/02946.

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