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. 20, 2007
Filed:
Jul. 27, 2006
Hisatada Miyatake, Ohlsu, JP;
Hisatada Miyatake, Ohlsu, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Pseudo SRAM capable of arbitrating refresh requests with external access requests is provided. An access waiting circuitfor generating an access waiting signal /ECP in response to an external access request signal /CE or the like, an access activating circuitfor generating an access activating signal /AE in response to L level of the access waiting signal /ECP and H level of a busy signal /BUSY, a refresh waiting circuitfor generating a refresh waiting signal /REFP in response to a refresh request signal /REFT, and a refresh activating circuitfor generating a refresh activating signal /REFE in response to H level of the access waiting signal /ECP, L level of the refresh waiting signal /REFP, and H level of the busy signal /BUSY are provided. An array control circuitperforms an access operation in response to the access activating signal /AE, and performs the refresh operation in response to the refresh activating signal /REFE.