oaGateOrientation (oacGateOrientation)

Description

The built-in oacGateOrientation layer contraint specifies horizontal, vertical or any orientation required for building gates. Gates can be built using any orientation if any orientation is specified or if this constraint is not specified. An optional parameter limits application of the constraint to only those gates that have a width equal to or less than a specified value.

Constraint at a Glance

Constraint type:	oaLayerConstraint
Value types:	oaIntValue
Database types:	oaTech
Object types:	oaAppObject

Values

The following value types are supported by this constraint:

oaIntValue

This oaIntValue is expressed using the oaGateOrientationType enumeration to represent a horizontal (oacHorizontalGateOrientationType), vertical (oacVerticalGateOrientationType ), or any (oacAnyGateOrientationType ) orientation. The default orientation is any direction if this constraint is not specified.

Units: Enum

This value is represented by an oaGateOrientationType enumeration:

Value	Name
oacAnyGateOrientationType	any
oacHorizontalGateOrientationType	horizontal
oacVerticalGateOrientationType	vertical

Parameters

The following parameters are supported by this constraint:

Name	Value Type	Units	Default	Description
width oacWidthConstraintParamType	oaIntValue	DBU	None	oacGateOrientation has a single, optional parameter to represent the maximum gate width at which this constraint applies. An oaConstraintParam of type oacWidthConstraintParamType represents the maximum gate width expressed in database units. If this parameter is not specified, the specified orientation applies to all gates.

Examples

Manufacturing Reasons

This constraint applies at the process level and might be used by layout generation tools that generate or place gates or used by layout checking tools. The constraint is associated with the derived layer representing gate shapes.