Electrical computers and digital processing systems: support – Clock control of data processing system – component – or data...
Reexamination Certificate
2008-07-01
2008-07-01
Du, Thuan N (Department: 2116)
Electrical computers and digital processing systems: support
Clock control of data processing system, component, or data...
C713S400000
Reexamination Certificate
active
10969000
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.
REFERENCES:
patent: 5063536 (1991-11-01), Tinder et al.
patent: 5469547 (1995-11-01), Pawlowski
patent: 5961626 (1999-10-01), Harrison et al.
patent: 6961863 (2005-11-01), Davies et al.
patent: 6978391 (2005-12-01), Ito et al.
Du Thuan N
Seiko Epson Corporation
LandOfFree
Synchronous/asynchronous interface circuit and electronic... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronous/asynchronous interface circuit and electronic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronous/asynchronous interface circuit and electronic... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3944789