dolby.yang
Member level 4
in sta ,to do setup and hold check, we need to select wire load mode, but there usualy have worst wire load mode and best wire load mode.how to select this two mode to do setup and hold check?
thanks!
thanks!
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sandysuhy said:Hi
In STA we go for best case analysis for Hold check and
worst case analysis for setup check.
hyena_dale said:setup time = clock cycle - max data delay
hold time = max clock delay(skew) - min data delay
With worst case condition, setup time can get most critical value,
With best case condition, hold time can get most critical value in mostly environment.