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. 06, 1999
Filed:
Dec. 01, 1997
Nobuyuki Sato, Hyogo, JP;
Hisashi Iwamoto, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric Engineering Co., Ltd., Tokyo, JP;
Abstract
A synchronous semiconductor memory device can achieve either of a pipelined mode and a prefetch mode with one chip. In accordance with CAS (column address strobe) latency 4 instructing signal MCL4 stored in a mode register, a sequence of generation of control signals from a control signal generating circuit is set to either the pipelined mode or the prefetch mode. A mode switching circuit merely switches reset timings of a write buffer in accordance with a CAS latency. Therefore, the internal data write mode can be easily switched in accordance with an operation environment, and the synchronous semiconductor memory device can implement multiple data write modes with one chip.