From: [email protected]
Date: Mon Nov 08 1999 - 10:57:14 PST
Michael T. Zhang wrote:
One such example is Intel's BX-based motherboards have the optional spread
spectrum clocking feature, which modulates the clocks for processor,
chipset, memory, and PCI, but keeps the USB clock fixed.
Would you elaborate a little bit?
I have this vision of PLL's in different chips chasing
the phase of the clock, but all of them at a different phase
because of different dynamics. Do they all know the modulating
algorithm so they can predict the next phase, or is the rate
of change from one edge to the next held low enough not to be a
problem?
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