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:
Mar. 28, 1989
Filed:
May. 21, 1987
Applicant:
Inventor:
Raymond Pinkham, Missouri City, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365230 ; 365195 ;
Abstract
A dual-port random access memory with multiple random inputs is disclosed which has a write mask register. The write mask allows a random write operation to occur on a subset of the random inputs, with the selected memory cells remaining undisturbed by the write operation. The write mask register provides for storage of the write mask information for a plurality of cycles, including intervening cycles which are unmasked writes. The write mask register may be loaded in two separate modes, either early in a cycle in conjunction with the row address strobe signal, or later in the cycle in conjunction with the write enable signal.