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:
May. 27, 1997
Filed:
Jul. 21, 1994
Kanji Mizuno, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a semiconductor memory device in which row and column address signals are serially supplied using a multiplexer or serial address signals are supplied without using a multiplex, a RAM interface is provided which easily makes it possible to replace a DRAM with a SRAM. A memory IC which is formed by a DRAM is changed to a SRAM, and a resulting SRAM memory IC is controlled using a logic IC 10 which is originally constructed for use with the original DRAM memory IC. Between the logic IC and the SRAM memory IC, a RAM interface is disposed. According to the present invention, it is possible to divide row-column address signals which are supplied in serial form into row address signals and column address signals and to modify a control signal which controls a dynamic RAM to control a static RAM.