Placement regions preference page – Achronix ACE Version 5.0 User Manual
Page 231
Preferences
Chapter 3. Concepts
Placement Regions Preference Page
The Placement Regions Preference Page configures how
are handled in the
and the
(when the Floorplanner’s Placement Region Tool is active).
NOTE:
Placement Regions are only presently supported for the 22iHD family of parts.
Figure 3.121: Placement Regions Preference Page screenshot
Placement Region Preferences
Option
Description
Placement Region Boundary Alignment
Snap to Clock Region
Boundaries
When creating, resizing, or moving Placement Regions, the Placement
Region boundaries will be forced to align with Clock Region Boundaries.
Use this for a simple, coarse-grained approach to Placement Regions.
Recommended setting for most 22iHD use cases.
Snap to Tile
Boundaries
When creating, resizing, or moving Placement Regions, the Placement
Region boundaries will be forced to align with Tile Boundaries, for a very
fine-grained region. Recommended only for advanced users of 22iHD
devices.
Drag and Drop Actions
Add only flops to the
constraint
When using drag-and-drop to assign Placement Region Constraints, this
setting ensures only flops will be assigned to the region constraint. All other
dropped items will be excluded from the constraint.
Include constants in
the constraint
When using drag-and-drop to assign Placement Region Constraints, this
setting allows constants to be included in the constraint. This setting is
ignored if ”Add only flops to the constraint” is enabled.
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UG001 Rev. 5.0 - 5th December 2012