We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 21828

11.1 PlanAhead - What is the difference between logical and physical hierarchy? How does PlanAhead affect each?


What are logical hierarchy and physical hierarchy? How does PlanAhead affect each?


Logical Hierarchy is the hierarchy of the netlist written by synthesis. PlanAhead imports an EDIF netlist and shows the netlist contents. 


Using PlanAhead, pblocks (AREA GROUPS) can be created and instances from logical hierarchy can be assigned to these physical blocks. PlanAhead creates a hierarchy different from the logical hierarchy to reflect creation of and logic assignment to these physical blocks.

AR# 21828
Date Created 09/04/2007
Last Updated 05/19/2014
Status Archive
Type General Article