Method and apparatus for determining the timing of snoop windows

Details Method and apparatus for determining the timing of snoop windows Method and apparatus for determining the timing of snoop windows

1995-04-20

1998-06-30

Butler, Dennis M.

395473, 395557, G06F 104

Patent

active

057747008

ABSTRACT:
A method and apparatus for determining the timing of snoop windows in a pipelined bus includes a snoop timer, a snoop counter, and snoop resolution logic. The snoop timer indicates the number of clocks until the next snoop window. The snoop counter keeps track of the number of snoop windows currently being tracked by the apparatus and is updated by the snoop resolution logic. In one embodiment, the snoop resolution logic updates the snoop counter when a snoop event occurs on the bus. In one embodiment, the apparatus also includes snoop drive logic which drives snoop result signals onto the bus during snoop windows.

REFERENCES:
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patent: 5548733 (1996-08-01), Sarangdhar et al.
patent: 5568620 (1996-10-01), Sarangdhar et al.
patent: 5572703 (1996-11-01), MacWilliams et al.
Val Popescu, et al., "The Metaflow Architecture", Jun. 1991, IEEE Micro, pp. 10-13 and 63-73.

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