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. 06, 2012
Filed:
Apr. 25, 2008
Anil Pothireddy, Hyderabad, IN;
Kirtish Karlekar, Bangalore, IN;
David Grant Wheeler, Rochester, MN (US);
Anil Pothireddy, Hyderabad, IN;
Kirtish Karlekar, Bangalore, IN;
David Grant Wheeler, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and an interfacing circuit are disclosed for transmitting data between a first clock domain operating at a first clock frequency Cand a second clock domain operating at a second clock frequency C. In accordance with this invention, data are transmitted from the first domain, through the interfacing circuitry, and to the second domain. Also, the interfacing circuitry includes a synchronization section that operates at a third frequency C, which, in one embodiment, is greater than and a whole number multiple of C. Preferably, Cis an even whole number multiple of C. In the preferred embodiment, a clock signal A is used to operate the second clock domain at frequency C, and a clock signal B is used to operate the synchronization section of the interfacing circuitry at frequency C, and clock signals A and B are source synchronized.