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analyze cell displacement during legalization.
This could happen , when during placement optimization, EDA tool can meet timing by sizing / adding cells. however during legalization of those cells, EDA tool may not find a nearest legal location to place those cells. This may be due to local...
The most easiest way would be to create a milkyway database.
if u already have an ICC db , dump it from there.
else if u use another third party PNR tool, take the design data & create a milkyway db.
this would be far easier to setup up the flow & would be more easier to debug, incase of...
For Example, if you wanted automate your synthesis flow. you could do something this.
1. use make & create a make target for synthesis - this would run the entire set of commands to be run for synthesis.
2. Perl - any post or pre processing required for the make target (here synthesis) can...
Depends on how do u want to design ? there is no single optimal solutaion for this problem
incase of starting form scratch - do top-down - as architectural top level strategies work better
Incase if ur are planning to re-use a design , then bottom-up would help.
Hi Kapil,
Did u try , something like this
setPlaceMode -forceFenceRegion true -hardFence true -honorSoftBlockage true
placeDesign
checkPlace
refinePlace -hardFence true
checkPlace
also dont forget to add
setOptMode -honorFence true
sometimes during optimization, if your congestion is high...
There is another perspective to your query too
seal ring is normally decouples your Die from wafer substrate, it actually prevent Die from getting infected from any substrate noise.
Reg. block level, it depends on what type of IP is present in your block, if u have a pure Analog Macro, it...
Also lot of time, if we have isolated power supplies in design , we would have different POWER (VDD) domains, but still we might share the same ground network. hence the need for VSS pads would arise in those scenarios.
u can try "insertRepeater" in SOC Encounter , but this will not be able to fix high-fanout nets with fanout greater than 1000.
If fanout > 1000 , run the optDesign command or the bufferTreeSynthesis command to fix high-fanout nets.
these links should help u
http://www.vlsitechnology.org/
http://iroi.seu.edu.cn/books/asics/book/ch03/CH03.7.htm
just a tip : try to learn concepts, tools are just means to achieve the end result.
As previous user told, redhawk is quite close to SPICE simulated values. Next comes Encounter Power System (from cadence).
A Big no for Primerail + PTPX combo at this point of time, as we have scenarios where the tool is unable to understand some of CCS constructs in .lib itself.
I hope...
these links should help u
https://www.arm.com/support/university/academic-resources.php
https://www.arm.com/support/university/tools.php
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