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. 28, 1995
Filed:
Jun. 23, 1993
Jean-Marie Munier, Cagnes sur Mer, FR;
Andre Pauporte, La Colle sur Loup, FR;
Clement Poiraud, Cagnes sur Mer, FR;
International Business Machines Corporation, Armonk, NY (US);
Abstract
An elastic buffer is provided between two busses working with independent clocking. The buffer is implemented by a piece of RAM memory (37) partitioned into sectors (41), each of which contains successive memory addresses. Each sector (41), can be alternatively written and read, so that at a given moment, a sector in write mode and a sector in read mode may coexist. Each sector is controlled by a mark flag (MF), a set flag corresponding to a fully written sector, and a reset flag corresponding to a sector that has been read onto the destination bus. The mark flag of each sector is set, respectively reset, upon the event of a move in pointer, respectively move out pointer, reaching the next adjacent sector. For a given elastic buffer size, the size of the sectors (41) and the number of mark flags are adaptable to the specifications of the data flow between the origin and destination busses.