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abstract generation

Hi,

I am using cadence abstract generator versionn 5.1.0. While I generate lef file, the whole process runs smoothly and I get a lef file. But when I used that lef file in SOC encounter, I noted that the pin placement of the cells were not preserved. I want pins of the cells to be exactly at same position where I placed in the layout but due to some reason abstract generator is putting the pins along the same net but at random positions. How can I control pin placement?

Regards,

Affaq

vvacad over 14 years ago

Hi Affaq,
Are the pins getting created at the texted locations? How is the layout being imported into the abstract generator? Is this through File->Import->Stream?
In 6.1, the abstract generator can directly read the layout views created by 6.1.x Virtuoso.
But in 5.1, Abstract generator does not read the 5.1.x Virtuoso layout directly & therefore does not directly read the pins created from 5.1.x Virtuoso. Instead it makes use of text attributes & overlapping shapes to identify pins & pin locations.
Please refer to the http://support.cadence.com/wps/PA_DocumentViewer/pubs/abstract/abstract5.1.41/abstractTOC.html
for detailed information for the abstract generator.
Regards,
Vikram
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