Layout verification using Assura

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Introduction

IMPORTANTE!!!!!!!!!!!!!!

Assura (Assura Physical Verification ) di per se' fa solo DRC e LVS!!!!!!!!!!!!!!!! La pex quella che si chiama Assura QRC in realta' e' fatta da un altro package, che si chiama Cadence QRC Extraction (che di fatto e' il sostituto di Assura RCX)!

Infatti sono 2 packages distinti, /usr/cadence/Assura_4.10oa-615 e /usr/cadence/EXT_9.13

Tutorials

Assura tutorial included in the tool installation:

$ASSURAHOME/tools/assura/samples/tutorials/

cds.lib setup (avTech)

 
DEFINE avTech   $ASSURAHOME/tools/assura/etc/avtech/avTech

Environment setup

cd ~cadence/tech_dir
mkdir assura
cd assura
mkdir drc lvs pex

Documentation in

/usr/cadence/Assura_4.10oa-615/doc/assurauser/assurauser.pdf

assura_tech.lib file 

cd ~/cadence/tech_dir/assura
cp <PDK install dir>/Assura/assura_tech.lib .

or make a sym link 

ln -s <PDK install dir>/Assura/assura_tech.lib .

Layout L/XL ⇒ Assura ⇒ Technology…

Layout L/XL ⇒ Assura ⇒ Rule Sets…

Specify './assura_tech.lib' or './assura/assura_tech.lib' 

avParameters(
   ...
   ...
   ... )


avCompareRules(
   ...
   ...
   ... )

rcxParameters(
   ...
   ...
   ... )

avParamenters(
   ?workingDirectory "/path/to/Assura/working/directory"
   ?runName "runName"
   ?inputLayout ("df2" "libraryName")
   ?cellName "cellName"
   ?viewName "layout"
   ?rulesFile "/path/to/Assura/rules/file"

Design Rule Check (DRC)

Layout Editor L ⇒ Assura ⇒ DRC

Layout Versus Schematic (LVS)

cd ~/cadence/tech_dir/assura
mkdir lvs
cd lvs
mkdir data runsets
ln -s ....

Layout Editor L/XL ⇒ Assura ⇒ Run LVS…

compare.rul and extract.rul files in the LVS technology directory 

ln -s /path/to/Assura/lvs/technology/compare.rul compare.rul
ln -s /path/to/Assura/lvs/technology/extract.rul extract.rul

Parasitic Extraction (PEX)

PEX = RCX in Assura

Layout Editor L/XL ⇒ Assura ⇒ Run RCX…

Layout Editor L/XL ⇒ Assura ⇒ Run QRC…

http://asic.ams.com/hitkit/hk410/assura/assura_qrc.html

http://icslwebs.ee.ucla.edu/dejan/classwiki/images/e/e7/QRC_Note-IC5141.pdf

http://cudoe.blogspot.it/2011/04/qrc-assura-how-to-fill-forms-for.html


Last update: Luca Pacher - Jul 15, 2014