Bidirectional single-line handshake with both devices driving th

Details Bidirectional single-line handshake with both devices driving th Bidirectional single-line handshake with both devices driving th

1996-02-16

1998-03-31

Ray, Gopal C.

395733, 395285, G06F 1324, G06F 1342

Patent

active

057348448

ABSTRACT:
Bidirectional handshake protocol circuitry is provided for asserting and deasserting a signal across a single line between a first device and a second device. Only the first device is permitted to assert the signal on the single line; and only the second device is permitted to deassert the signal on the single line. The protocol is particularly useful between a chipset and a CPU where the chipset asserts a System Management Interrupt (SMI) and the CPU deasserts the interrupt to signal to the chipset that the service routine is complete. After assertion (or deassertion), there is an overlap or hand-off period whereby the single line is driven in the same direction by both devices. After a predetermined number of clock cycles, the device which asserted or deasserted the signal is tristated to await deassertion or assertion, respectively.

REFERENCES:
patent: 4381542 (1983-04-01), Binder et al.
patent: 4433379 (1984-02-01), Schenk et al.
patent: 4631670 (1986-12-01), Bradley et al.
patent: 4669057 (1987-05-01), Clark, Jr. et al.
patent: 4769768 (1988-09-01), Bomba et al.
patent: 4897810 (1990-01-01), Nix
patent: 5276888 (1994-01-01), Kardach et al.
patent: 5367689 (1994-11-01), Mayer et al.
patent: 5410710 (1995-04-01), Sarangdhar et al.
patent: 5495615 (1996-02-01), Nizar et al.
patent: 5548762 (1996-08-01), Creedon et al.

Affiliated with

Also associated with

Rating

Bidirectional single-line handshake with both devices driving th does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bidirectional single-line handshake with both devices driving th, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bidirectional single-line handshake with both devices driving th will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-60920