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:
Apr. 30, 1996
Filed:
Sep. 16, 1993
Applicant:
Inventor:
Craig S Holt, Cohasset, MA (US);
Assignee:
Codex, Corp., Mansfield, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ; G11C / ;
U.S. Cl.
CPC ...
375372 ; 375371 ; 395250 ; 3701053 ;
Abstract
A FIFO uses a fill indicator circuit to indicate a fill status and provide control signals to a data source and data sink to cease operation. A serial string of FIFO cells propagates data from input to output by sending request and acknowledge signals between adjacent cells. The request signal initiates data transfer to the next logical cell and the acknowledge signal indicates completion of the transfer. The fill indicator has one cell for each FIFO cell for monitoring the request and acknowledge signals looking for predetermined state sequences to indicate whether each FIFO cell is full or empty.