Koninklijke Philips Corporation N.v.

Torsten Kramer

Wolfgang Eber

Peter Thueringer

Ralf Malzahn

Dominik Josef Berger

Klaus Ully

Markus Feuser

Jozef Laurentius Wilhelmus Kessels

Volker Timm

Peter Kompan

A data carrier is disclosed. The data carrier includes a data processing unit and at least one contactless interface via which the data processing unit can be coupled to a read/write apparatus in order to exchange data signals and to take up electrical energy for the operation of the data processing unit; the data processing unit is constructed at least mainly while using at least substantially asynchronously operating logic components (asynchronous logic). The data carrier according to the invention, such as a chip card, makes optimum use of the energy applied thereto and is at the same time protected against the tapping of the signal processing steps to be executed therein.

Data carrier

A data carrier ( ) for the contactless communication of communication information (KD) with a transmitting/receiving station ( ) includes receiving circuit ( ) for receiving an HF signal (HF) containing the communication information (KD) from the transmitting/receiving station ( ), and processing circuit ( ) for processing the received communication information (KD), and supply voltage generating circuit ( ) for rectifying the received HF signal (HF) and for energizing the processing circuit ( ) with a supply voltage (UV), and reset circuit ( ) for resetting, when the supply voltage (UV) decreases below a reset voltage value (UR), the processing performed by the processing circuit ( ), the reset circuit ( ) now being adapted to interrupt the processing of the communication information (KD) by the processing circuit ( ) at least partially when the supply voltage (UV) decreases below an interruption voltage value (UU), the interruption voltage value (UU) being greater than the reset voltage value (UR).

Data carrier having reset means for interrupting the processing

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Hamburg, Germany

Torsten Kramer