[SI-LIST] Re: How Do Others Do Timing Analysis Without Tool Like BLAST

Hi Harold,

There are any number of ways that one can do static timing
analysis and there are a number of tools that one can perform
this analysis with.  I think that the biggest barrier to 
entry with most of these tools is cost.  Going to a show 
like designcon will expose you to the number of vendors that 
produce these tools and what the price spectrum may be.  The
second element to this is what your tool flow is and how 
information can be passed forward and backward.  By performing
pre-layout timing analysis you can create a set of constraints 
that can be used to drive your router.  This prelayout analysis
can also set up your timing budget which can also help drive 
your placement and find errors early in the design process.
Errors found after routing are costly from both a dollar cost 
and schedule perspective.  These constraints 
can also be used to generate drcs so your timing errors can
be easily found at the physical implementation.   Often times 
timing analysis will be performed prior to placement to see 
if the flight times have a reasonable budget.  The timing can
then be performed after placement using the manhatten lengths
of the routes to perform timing and finally after routing.  
When done properly the post route sim should be quick and relatively
uneventful.  

I hope that this helps.

Just my 0.02

best regards,

Michael Greim

-----Original Message-----
From: polus@xxxxxxxxxxx [mailto:polus@xxxxxxxxxxx]
Sent: Friday, September 21, 2001 9:39 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] How Do Others Do Timing Analysis Without Tool Like
BLAST





Greetings Everyone!

How do the rest of you perform timing analysis. WE have XFX but not BLAST.
Currently I do it in EXCELL with a home grown internal tool. This is
cumbersome
and time consuming.

There has to be a better way, particularily for pre-layout design rather
than
having to wait for post layout data and using something like BLAST.

Any suggestions?

Harold Polus
Lexmark Laser Printer Controller Development
SI & EMC


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