[SI-LIST] : The Skew control in ICX.

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From: In-myung Song (imsong@itx03.internex.co.kr)
Date: Fri Jul 07 2000 - 01:27:12 PDT


Good morning everybody.

In korea, it is summer then very hot and sweat to be death.
The weather drive me crazy.

I have some question about skew control in ICX.
If there are some experts out of newsreaders, please help me.

I know that the skew control of specific nets means minimizing or
matching the propagation delay of
all the specific nets. right?
If then, when I control the skew in ICX, I set the a allowed. min delay
"a" and allowd, max delay "a+1" in timing rule sheet.
After synthesize of all the specific nets, when I open the timing rule
sheet the value of "a" is changed some specifc number, but the number is
bigger than allowed min. delay and smaller than allowed max. delay. Then
the min delay errors are occured.
I want to know why the value of "a" becomes one specific number and how
the ICX can calculate that number of "a".
And I want to know why the value of "a" is bigger that actual min.
delay.

Please help me.

 Inmyung Song.

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