Method and apparatus for programmable adjustment of computer system bus parameters
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United States of America Patent
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Mar 18, 2003
Grant Date -
N/A
app pub date -
Aug 31, 1999
filing date -
Aug 31, 1999
priority date (Note) -
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Abstract
A system for programmatically adjusting electrical characteristics of a bus interface so as to modify bus operating and signaling parameters employs a control module or mechanism, responsive to a digital signal, for setting the characteristic's value. The electrical characteristic can be a voltage determinative, for example, of any of the following bus operating and signaling parameters: driver output rise time, driver output fall time, driver voltage limits, driver propagation time, receiver threshold voltage levels, or termination resistance. The digital signal can be generated, for example, by a computer-executable program, a controller, or other such device, that applies the digital signal to the control mechanism, for example, via a JTAG interface/controller.
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