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. 01, 2008
Filed:
Oct. 21, 2004
Nobuo Karaki, Matsumoto, JP;
Nobuo Karaki, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An exemplary embodiment provides a synchronous/asynchronous interface circuit and an electronic device for coupling an asynchronous circuit block onto a globally synchronous circuit system. A synchronous/asynchronous interface circuit according to an exemplary embodiment of the present invention includes a finite state machine that controls access cycles between a synchronous bus and an asynchronous CPU in an event-driven fashion and a detection circuit that detects beginnings of the access cycles. In interfacing with the asynchronous CPU, the finite state machine controls the access cycles by transiting in states handshaking with the asynchronous CPU. Meanwhile, in interfacing with the synchronous bus, the finite state machine controls the access cycle by transiting in states synchronizing with a global clock supplied from the synchronous bus.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile