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:
Nov. 15, 2005
Filed:
Jan. 06, 2005
Koji Shimbayashi, Aizuwakamatsu, JP;
Koji Shimbayashi, Aizuwakamatsu, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A semiconductor memory device wherein, in continuous data reading, a notification signal to notify whether a suspend mode is entered or not is given synchronously with data output control according to an output control signal with a suspend function, and a method of controlling the device. When an output enable signal is also used as a suspend instruction, a synchronizing circuit synchronizes the output enable signal with a clock signal to output a synchronized output enable signal. This synchronized output enable signal is supplied to a ready control circuit and an output buffer circuit so that the output control of data and ready signal is performed in synchronization with the clock signal. A data terminal goes into a high impedance state in synchronization with the clock signal, which notifies transition to the suspend mode. This quickly notifies that the system bus has become open.