Cadence LEF/DEF Exchange Format:

Distributions:

• LEF/DEF Reference
• LEF/DEF Parsers:
  • LEF reader/writer parsers (source)
  • DEF reader/writer parsers (source)

Downloads are Organized by:

LEF/DEF Format Specification	LEF/DEF Specification Releases in PDF format No license approval required for download as the document contains the copyright.
LEF/DEF Toolkit	Toolkit dated release names (like lefdef5.6_110904 ) reflect releases with changes to parsers NOT to the LEF/DEF reference. Toolkit contents: Parser API Documentation LEF reader/writer parsers (source) DEF reader/writer parsers (source) The LefDef License V2.1 January 17, 2003 is required for all LEF/DEF Toolkit downloads.

NOTE: The LEF/DEF parser libraries are used by the OpenAccess lef2oa, def2oa, oa2lef, oa2def translators.