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:
Sep. 15, 1998
Filed:
Dec. 23, 1994
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kanagawa-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395477 ; 395478 ; 395485 ; 395732 ; 395512 ;
Abstract
An access control apparatus comprises a memory accessed by a plurality of devices, a circuit for giving priority levels to the requests of these devices in access to the memory, a circuit for selecting one from these access requests according to the priority levels, and a control circuit for allowing a device not selected to access the memory in preference to the other ones, after a specified time has elapsed since the access was started. Use of the control circuit assures efficient access for a low-priority access request.