Transition time violations

max transition violation

How important is transition time violations. I have got 600-700 violation in Max Trans. How can i fix it in Astro?:?:

max transition time

what is transition time violations?How is it different from setup & hold violation?

transition time violations

u an backedn guy? than only you need to worry about max_transition violations ...

how to fix transition time violations

Yes, I am a Back-end Engineer but dont know how to fix transition time violations in Astro. Is it necessary to run CTO to fix transition time violations.

max transition

kapil_vlsi1 said:

Yes, I am a Back-end Engineer but dont know how to fix transition time violations in Astro. Is it necessary to run CTO to fix transition time violations.

Click to expand...

Hi. Dear kapil
The max transition time is one of the three Design Rules..(max fanout, max transition, max capacitance )
It is much more important than setup/hold timing.
As we all know, in STA , the delay of each std cell is calculated from looking up the NLDM ( non-linear delay model ) tables which is defined in library. These tables are two factors : input transition time, and output load. The result of table is the delay value of cell under certain input transition and output load.
If the input transition or output load is within but not the values in NDLM, interploation is utilized to calculate.
If the input transition or output load is out of range of NLDM, ext-interpolation is used to calculation. But it is natual the result would be rather in-accurate.
So the STA will be rather in-accurate. Timing analysis is un - believable .
Now. You can understand how important max tran is .

how to fix transition in astro

your design is for which application?

diff-net violation astro

It is for WLAN. Wht r the different ways of eliminating transition violations in Astro.
Say, I have a net which says that there is input slew is more for a particular cell then how do I find it out where that particular net is. Is anybody having a script for it any body having a script to reduce the max transition violations.

transition time output delay

One more reason of fixing max transition violation is that bigger transition will result in bigger DC power consumption

input transition time

the margin in 30% of max transition is allowed.
for example,if the constraint of max transition is 1ns, then 1.3ns is allowed.