OpenAccess to DEF Mapping

The constructs are ordered alphabetically. Each construct links to a page describing how data stored in an OpenAccess database maps to a corresponding DEF construct.

On output of DEF, only layers that have materials metal, cut, N/PImplant (5.6 only), N/PDiff, or poly are output. If objects in the database contain other layers, the entire object is silently ignored.

BLOCKAGES	GROUPS	ROW
BUSBITCHARS	NAMESCASESENSITIVE	SCANCHAINS
COMPONENTS	NETS	SPECIALNETS
DESIGN	NONDEFAULTRULES	STYLES
DIEAREA	PINS	TECHNOLOGY
DIVIDERCHARACTER	PINPROPERTIES	TRACKS
FILLS	PROPERTYDEFINITIONS	UNITS
GCELLGRID	REGIONS	VIAS

DEF Constructs Not Supported

Some constructs in DEF 5.3 and earlier versions are obsolete in DEF 5.4 and 5.5. When processing a 5.3 file, the translator ignores constructs that are obsolete in 5.4 and subsequent versions.

Constructs supporting gate array style designs are not supported for DEF in OpenAccess. In addition, the following specific constructs are not supported.

BEGINEXT
HISTORY
SLOTS
SUBNET
VPIN
ARRAY arrayName 
FLOORPLAN {DEFAULT | floorPlanName}

CANPLACE sitename 
    origX origY 

orient DO numx BY numY STEP spaceX spaceY 

CANNOTOCCUPY sitename
    origX 

origY orient DO numx BY numY STEP spaceX spaceY

In the COMPONENTS statement, the following is not supported:

     [netName | *]...

OpenAccess is always case sensitive, and therefore, the NAMESCASESENSITIVE statement is ignored.