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. 21, 2006
Filed:
Apr. 10, 2003
Eric E. Retter, Austin, TX (US);
John M. Sutton, Essex Junction, VT (US);
Eric E. Retter, Austin, TX (US);
John M. Sutton, Essex Junction, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention provides hardware-based synchronization within a device such as a set top box so that sets of data values can be communicated between a set of DCR registers operating at a first frequency and a set of clock register operating at a second frequency. Specifically, to communicate an initial set of data values from the set of DCR registers to the set of clock registers, a control signal is stretched and then synchronized with a clock signal having the second frequency. To communicate a current set of data values from the set of clock registers to the set of DCR registers, the control signal is synchronized with a clock signal having the first frequency. By communicating the current set of data values to the first set of registers, a hardware component (e.g., a CPU) can access the current set of data values without restriction.