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. 15, 2003
Filed:
May. 06, 2002
Hidenobu Gochi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The semiconductor memory system includes a first semiconductor memory device, a second semiconductor memory device and a controller. The first memory device is arranged so that data reading and writing at high speeds is performed through the interface of the buses connected to the address inputs and the data I/O ports. The second memory device is arranged so that data reading and writing is controlled by commands provided via the data I/O ports. The controller is arranged responsive to commands from a CPU for controlling the read and write operation of each of the memory devices. In this system, a single write operation of the CPU to the controller can simultaneously write the same data into the memory devices. Accordingly, the time required for data reading and writing on a plurality of memory devices can be minimized, and thus the efficiency of its overall operation can be increased.