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. 13, 1997
Filed:
Dec. 27, 1994
Satoru Hoshi, Kawasaki, JP;
Masami Masuda, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
In an asynchronous type memory device for controlling a plurality of bytes independently, even if the byte control signal changes in the write cycle, the automatic power-down can be released and further the data can be read after data have been written. When data are transferred from the input/output terminals I/OUBm and I/OLBn to the internal data buses DbusUB and DbusLB through the upper byte data input buffers DinUBm and the lower byte input buffers DinLBn, the change detecting sections UWTD and LWTD generate the write start synchronous pulse .phi.BWS and the write end synchronous pulse .phi.BWE on the basis of the logical result of the write request signal /WE and the control signal /UB or /LB. Therefore, when the data are written and read for each byte independently, data can be written in and read from the memory cells irrespective of the data conditions. Further, the written data can be read immediately without changing the addresses.