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:
Jan. 08, 2013
Filed:
Sep. 07, 2007
Werner Schoegler, Graz, AT;
Michael Böhm, Graz, AT;
Werner Schoegler, Graz, AT;
Michael Böhm, Graz, AT;
Austriamicrosystems AG, Unterpremstatten, AT;
Abstract
A microcontroller comprises a microprocessor (), a test interface () and an internal non-erasable memory (). First control means () are provided which are able to activate and deactivate the test interface (), and second control means () are provided which are able to activate and deactivate the internal non-erasable memory (). The microprocessor () of the microcontroller comprises control outputs () which are connected with the first and second control means (). With appropriate timing of activation and deactivation of the test interface () and the internal non-erasable memory (), the microcontroller offers the possibility of preventing an unauthorized access to contents of the internal non-erasable memory () without limiting the usability of the test interface () for the development of application programs. The microcontroller further offers the possibility to entirely block access to data which are stored in the microcontroller or have been processed within the microcontroller via the test interface ().