Alternating data valid control signals for high performance data transfer
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United States of America Patent
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Sep 23, 1997
Grant Date -
N/A
app pub date -
Mar 25, 1996
filing date -
Oct 3, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method which utilizes a unique bus protocol in conjunctions plural Dval.sub.-- control signals to minimize the dead time between blocks of data being transferred between components is a data processing system. The present invention introduces another latch-to-latch data valid control signal and alternates the usage of this signal during back to back data transfers from the same or different bus devices. In this manner the restore and tristate dead cycles are totally overlapped with the data transfer and the minimum possible number of dead cycle(s) is achieved between different blocks of data transfers. With the method of the present invention, data providers alternately activate the Dval.sub.-- signals and data receivers look at all Dval.sub.-- signals and if any one of them is active, then the data is considered valid and can be read.
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