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1. (WO2001035335) CHIP CARD HAVING A CONTACT INTERFACE AND A CONTACTLESS INTERFACE

Pub. No.:    WO/2001/035335    International Application No.:    PCT/DE2000/003985
Publication Date: Fri May 18 01:59:59 CEST 2001 International Filing Date: Tue Nov 14 00:59:59 CET 2000
IPC: G06K 19/07
Applicants: INFINEON TECHNOLOGIES AG
HOFMANN, Harald
SCHRAUD, Gerhard
WOERZ, Hans
Inventors: HOFMANN, Harald
SCHRAUD, Gerhard
WOERZ, Hans
Title: CHIP CARD HAVING A CONTACT INTERFACE AND A CONTACTLESS INTERFACE
Abstract:
The invention relates to chip cards having a contact interface and a contactless interface. It is not possible to simultaneously operate both interfaces. Only one of the two interfaces can be operated. The aim of the invention is to simultaneously operate both interfaces (KI, KLI) of a chip card having one contact interface (KI) and a contactless interface (KLI) for data transmission. The contact interface (KI) is connected to a first data line (DL1) and the contactless interface (KLI) is connected to a logical circuit (MC) via a second data line (DL2). A controllable switch (S1, S2) can be provided in one or both data lines (DL1, DL2) respectively. Said switch is controlled by the logical circuit (MC) which is preferably embodied as a microcontroller or microprocessor. The cycle (CL) for the microcontroller or the microprocessor (MC) can be generated from the cycle (CL1) supplied by the contact interface (KI) and the cycle (CL2) supplied by the contactless interface (KLI) by means of disjunctive connection in an OR gate (O) for instance. The inventive chip card can be realised in an advantageous manner as an electronic purse (EG) having a display device (AZ) for the state of an account.