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#openlane
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# openlane
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Matthew Guthaus

04/29/2021, 10:32 PM
Is there documentation of the PDN creation anywhere? I'm looking at examples in the Caravel design that create their own pdn.tcl script. Is there an overview of the requirements for this?
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Manar Abdelatty

04/30/2021, 3:37 PM
@Matthew Guthaus OpenROAD has a good documentation on the
pdn.tcl
syntax here https://github.com/The-OpenROAD-Project/OpenROAD/blob/master/src/pdngen/doc/PDN.md. Openlane has a file called
common_pdn.tcl
which automates the PDN generation based on a number of variables and the documentation for that is here https://github.com/efabless/openlane/blob/a95f56dac367c05bc48b4a001c419b58ec9648a4/docs/source/hardening_macros.md#power-grid-pdn
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