The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1998
Filed:
Jul. 31, 1995
Applicant:
Inventors:
Laurent Sourgen, Aix-en-Provence, FR;
Sylvie Wuidart, Pourrieres, FR;
Assignee:
STMicroelectronics S.A., , IT;
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
380 50 ; 380-9 ; 380 28 ; 380 49 ; 380 59 ;
Abstract
The present invention concerns a method for the numerical scrambling by permutation of data bits in a programmable circuit comprising a control unit and at least one data bus (DBUS) to transmit data between the control unit and several memory circuits. It consists of having data on the bus either in a scrambled form or in an unscrambled form according to whether it is instructions data or not. And data in some of the memories is scrambled. The present invention also concerns a method for realising a permutation circuit.