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What do you need to cover in STA ?

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omara007

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Hi guys ..

What are the main things that you need to do in the STA phase ? .. I mean what else other than setup time and hold time ?
 

Along with set-up and hold we also do maxcap, max trans, etc type of analysis
 

coolrak said:
Along with set-up and hold we also do maxcap, max trans, etc type of analysis

would you please explain these terms ?
 

i think he ment setuptime / holdtime maximum capacitance and maximum transconductance..

i have a small npresentation on STA.. wud upload it as soon as i find it.. wud end it in the same post..

with regards,
arun
 

Hi Omara,

Every technology has some limitations and the foundry specifies them to consider

them while designing. normally vendor specifies the maxcap,maxtrans and maxfanout

load values and in STA we make sure we dont violate these values for each node.

These are the different checks

 Capacitance:
 Maximum allowed node capacitance (max_capacitance)
 Minimum allowed node capacitance (min_capacitance)

Transition:
 Maximum allowed signal transition (max_transition)
 Minimum allowed signal transition (min_transition)


Fanout:
 Maximum allowed fanout load (max_fanout)
 Minimum allowed fanout load (min_fanout)
 

arunragavan said:
i think he ment setuptime / holdtime maximum capacitance and maximum transconductance..

i have a small npresentation on STA.. wud upload it as soon as i find it.. wud end it in the same post..

with regards,
arun

waiting for your presentation ..
 

Ok dude.. here you go.. ive attached a copy of the STA presentation.. its kind extensive and hope it wud help you..
share you feedback on STA.. its very important.. and timing closure has to be meet..

enlighten us with your knowledge on STA..


with regards,
arun
 

    omara007

    Points: 2
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during STA, we need to check setup and hold, recovery and removal checks, DRCs, MAX/MIN path delays, etc..
 

Read the book by himanshu bhatnagar on ASIC and systhesis...its gr8...and u can easily download it from this forum....in case ur unable to find it u can contact me and il mail u a soft copy....
 

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