horizontalRouteGridOffset

Sets the offset from the origin, in user units, for the start of the vertical routing grid. Along with the horizontalRouteGridPitch, this constraint defines the route grid points on the X axis for the layer.

horizontalRouteGridOffset Quick Reference

Constraint Type	Layer
Value Types	`Value`
Database Types	Design, Technology
Scope	design, foundry
Category	Routing

Value Type

horizontalRouteGridOffset constraints have a Value that represents the offset, in user units, from the original in the X direction for the layer.

Examples

In this example, the start for the vertical routing grid on Metal1 is offset 1.5 from the origin in the X direction.

Format Example

Format	Example
Tcl	set_layer_constraint -constraint horizontalRouteGridOffset \ -layer Metal1 -Value 1.5
LEF	Layer Metal1 TYPE ROUTING ; OFFSET 1.5 ; This example sets the same value for both horizontal and vertical offsets. If the values differ, include both values using this syntax: OFFSET `f_offset_x f_offset_y` ;
Virtuoso	routingGrids ( (horizontalOffset "Metal1" 1.5) )

Tcl

set_layer_constraint -constraint horizontalRouteGridOffset \
-layer Metal1 -Value 1.5

LEF

Layer Metal1
   TYPE ROUTING ;
     OFFSET 1.5 ;

This example sets the same value for both horizontal and vertical offsets. If the values differ, include both values using this syntax:

     OFFSET f_offset_x f_offset_y ;

Virtuoso

routingGrids (
   (horizontalOffset "Metal1" 1.5)
   )

Virtuoso Space-based Router Constraint Reference
Product Version IC23.1, June 2023