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:
Feb. 18, 2003
Filed:
Mar. 17, 1999
Applicant:
Inventor:
Nobuo Namekawa, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/200 ;
U.S. Cl.
CPC ...
G06F 1/200 ;
Abstract
In an integrated circuit in which data can be read out from a memory ( ) by supplying control data through an access port ( ), this integrated circuit includes an access detecting circuit ( ) for detecting an access using the access port ( ) and an output inhibit circuit ( ) for inhibiting the output of data from the memory ( ) when this access detecting circuit detects the access. Therefore, in the integrated circuit in which data can be read out from the memory ( ) outside of the integrated circuit by a standardized protocol, the reading of data that should be made unintelligible can be limited.