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:
Aug. 26, 2008
Filed:
May. 31, 2006
Toshio Ogawa, Kawasaki, JP;
Yoshihiro Takemae, Kasugai, JP;
Yoshinori Okajima, Kawasaki, JP;
Tetsuhiko Endo, Kawasaki, JP;
Yasuro Matsuzaki, Kawasaki, JP;
Toshio Ogawa, Kawasaki, JP;
Yoshihiro Takemae, Kasugai, JP;
Yoshinori Okajima, Kawasaki, JP;
Tetsuhiko Endo, Kawasaki, JP;
Yasuro Matsuzaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A memory controller multiplexes access signals each consisting of a plurality of bits as optical signals and outputs the multiplexed optical signals. At this time, the optical signals whose wavelengths differ depending on memory devices are generated. A memory interface unit demultiplexes the multiplexed optical signals into the original optical signals and converts the demultiplexed optical signals into electrical signals. The memory interface unit determines to which of the memory devices the electrical signals resulting from the conversion should be outputted, according to the wavelengths of the demultiplexed optical signals. This frees the memory controller from a need for transmitting to the memory interface unit a signal for identifying the memory device. The memory interface unit need not include a decoding circuit for identifying the memory device.