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:
Jul. 13, 1999
Filed:
Sep. 16, 1997
Douglas Garde, Dover, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A digital signal processing system includes a cluster of processors and a host. A host can access each of the processors through an external bus system that interconnects the host with each of the processors. An external port of each of the processors operates at one of a local clock frequency and host clock frequency, the local clock frequency and host clock frequency being asynchronous with one another. The host operates at the host clock frequency. Upon a host access of one of the processors, the clock frequency of operation of the external parallel port of each processor automatically is controlled to operate at the host clock frequency. In an embodiment, each processor also includes a core processor that operates at a core clock frequency that is a multiple of the local clock frequency, asynchronous with the host clock frequency. Thus, the speed of operation of the core processor and that of the external parallel port can be optimized independently.