July 2004
Intermediate to advanced
1744 pages
35h 3m
English
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Minimum One BCLK Response Time
The protocol is defined in a manner that always allows a minimum of one BCLK cycle after a condition is detected before an agent must present a reply. As an example, refer to Figure 43-9 on page 1135. Assume that a processor detects that it has acquired bus ownership on the rising-edge of BCLK0 in BCLK cycle 1. It takes action on this by assuming bus ownership starting on the rising-edge of BCLK0 in BCLK cycle 2 and driving out its transaction request onto the appropriate signals. In no case does a FSB agent have to present its reply during the same BCLK cycle in which it detected a condition.
Figure 43-9. Sample-to-Reply Interval
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