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IEEE-like spec on CDBA and OA

goofycat

Hello,

In lots of places and legacy projects I saw “prop.xx”, which libManager describes as preceding data.dm.

  1. The prop.xx is defined in CDBA
  2. Data.dm is defined in open access
  3. Both seem to refer to “property bag” info

It was difficult to find good formal specification for CDBA and OA (like IEEE specifications which are like “one-stop” gold standard). Could Cadence post some links here?

Also, could you explain what exactly is “property bag”?

 

G

  • CDB is an obsolete proprietary Cadence database, which was last used in the IC5141 release (which was released in 2004, and had its hast hotfix in 2011). There is documentation on CDBA (which is the API for the database) - the C API can be found in the Integrators Toolkit documentation, and the SKILL API can be found in the Design Framework SKILL functions manual.

    OpenAccess is an open database from Si2. You'll find information on the database there. The CDBA API still works in Cadence tools to read/write to the database, but underneath there is a separate C++ OpenAccess API which is published by Si2.

    A property bag is a database which is used to hold a collection of (typically meta-data) properties. It can appear at the library level (to hold library properties), the cell level (to hold cell properties) and the cellVIew level (to, as  you'll have guessed by now, hold cellView metadata properties).

    The Si2 OpenAccess site is here.

    Regards,

    Andrew.

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