Method enabling an exchange of data between a smart card and an apparatus
US6760858B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2000 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Feb 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method that enables a smart card to exchange data with an apparatus, which is intended to supply the smart card with a permanent clock signal in a permanent mode of operation. The method according to the invention includes the steps of detecting, in the course of the permanent mode of operation, of an impending disappearance of the permanent clock signal, wherein the detecting step includes a comparison of the value of the amplitude of the permanent clock signal with a predetermined value; and substituting an auxiliary clock signal for the permanent clock signal. The invention enables the smart card to receive, after the disappearance of the permanent clock signal, a number of clock pulses which suffices for completing pending read/write operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.