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. 29, 2008
Filed:
Mar. 23, 2005
Hideki Matsuyama, Kanagawa, JP;
Hideki Matsuyama, Kanagawa, JP;
NEC Electronics Corporation, Kawasaki, Kanagawa, JP;
Abstract
Memory protection apparatus to protect memory area to realize high interruption response and prohibit from access to the memory area that is previously designated. The memory area data registers() to (m), respectively, retain data which designate the accessible memory area in the processing corresponding to interruption of the group number corresponding to it. Selection circuitselects any of the memory area data registers() to (m) according to the group number retained by the group number register, and outputs data that designates selected memory area retained by the memory area data registers. Address bus watching partwatches generation of illegal memory access of the processor according to the data designating the memory area output by the selection circuit