You can create QuadrantClock regions only for Fusion, ProASIC3E, and ProASIC3 devices.
To create a QuadrantClock region:
In the Net
tab of the Hierarchy window, select
a clock net.
Clock nets have a clock icon next to them in the Net view.
From the Region menu, choose Create QuadrantClock, or click its icon in the toolbar. "Select a point in the Chip..." appears in the status bar.
Select a point in the chip that is driven by QCLK. ChipPlanner creates a QuadrantClock region for the given net. The region name is Qclock_<netname> and appears in the Regions tab of the Hierarchy window. A tickmark appears next to the net in the Net tab and next to all the macros driven by it.
Under the following conditions, ChipPlanner does not create a QuadrantClock region and displays an error message in the Log window:
A net is not selected or more than one net is selected.
The selected net is already assigned to a QuadrantClock region.
Any macros connected to the selected net are locked outside of the region.
Any macros connected to the selected net are assigned to a region that does not overlap the QuadrantClock region.
The macros connected to the net exceed the capacity of the quadrant clock.
Note: You can also create a QuadrantClock using the assign_quadrant_clock command in a PDC file.