Microprocessor card including a hard-wired communication circuit

  • US 7,201,325 B1
  • Filed: 01/14/1999
  • Issued: 04/10/2007
  • Est. Priority Date: 01/27/1998
  • Status: Expired due to Term
First Claim
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1. A card with a microprocessor and at least one contact, and a communication device in the form of a hard-wired circuit disposed between the contact and the microprocessor that checks the integrity of signals transmitted between the microprocessor and a terminal, wherein said communication device includes:

  • means to determine whether an item of information received by the card from the terminal is erroneous; and

    means to generate and return at least one item of information to the terminal which is a function of said determination.

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