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:
Jul. 23, 1991
Filed:
Mar. 10, 1989
Tsukasa Matoba, Kawasaki, JP;
Takeshi Aikawa, Chofu, JP;
Mitsuyoshi Okamura, Tokyo, JP;
Kenichi Maeda, Kamakura, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A copy-back type cache memory device using a delayed wait method capable of completing a data-write process in one process cycle. The device includes single word memory means for storing the single word of the selected data in a data memory means when an access for a data-write is made, the single word being located at the address in the data memory means corresponding to the processor address; and copy-back memory means for restoring the superseded data along with other data together with which the superseded data forms a block, so that the block can be reorganized in its original state before the data-write process takes place. The device may alternatively include an address latch means for delaying transmission of a processor address from the processor to the data memory means by a predetermined number of process cycles when access by the processor is for a data-write process; and a data latch means for delaying transmission of a processor data from the processor to the data memory means by the predetermined number of process cycles when access by the processor is for a data-write process.