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:
Oct. 25, 2005
Filed:
May. 11, 2001
Applicant:
Kaoru Adachi, Asaka, JP;
Inventor:
Kaoru Adachi, Asaka, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F013/00 ; G06F001/06 ;
U.S. Cl.
CPC ...
Abstract
Bus-connected circuits are made to operate stably and at high speed. A cache memory for high-speed access and a DRAM for low-speed access are connected to a CPU by an address bus, control bus and data transfer bus. A switch is provided in the bus at a point between the cache memory and DRAM and the switch is opened at the time of high-speed access. Since bus length is essentially shortened at such time, the cache memory can be accessed stably at high speed. When the DRAM is accessed, the switch is closed.