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:
Apr. 20, 2010
Filed:
Feb. 16, 2007
Akinari Todoroki, Okaya, JP;
Akihiko Tamura, Matsumoto, JP;
Katsuya Tanaka, Sapporo, JP;
Hiroaki Takada, Nagoya, JP;
Shinya Honda, Aichi, JP;
Akinari Todoroki, Okaya, JP;
Akihiko Tamura, Matsumoto, JP;
Katsuya Tanaka, Sapporo, JP;
Hiroaki Takada, Nagoya, JP;
Shinya Honda, Aichi, JP;
Seiko Epson Corporation, Tokyo, JP;
National University Corporation Nagoya University, Nagoya-shi, JP;
Abstract
To provide a processor capable of achieving high processing efficiency by performing the exclusive control between task processing and interrupt handling properly even in a multiprocessor. An interrupt processor that includes a plurality of unit processors, in which at least of the plurality of unit processors is capable of performing interrupt handling requested from the outside is configured such that the unit processor Pof the unit processors Pto Pcomprises an purge inhibit flagfor causing the unit processor Pto enter a lock state where the purge of the task is being inhibited, a hardware semaphore unitfor inhibiting other unit processors from accessing a predetermined region in memory accessed by the unit processor Pafter the unit processor Pis brought into the lock state, and an interrupt control unitfor inhibiting the interrupt processor from performing the interrupt handling during the execution of exclusive control.