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Layout verification using Assura
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Contents
- Introduction
- Environment setup
- Design Rule Check (DRC)
- Layout Versus Schematic (LVS)
- Parasitic Extraction (PEX)
Keywords:
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
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…