The wholechip floorplan is very important before you start the layout. & W& k' G# Y. b* h8 {Then the position of output pin are fixed for each sub block,and the line drawing will be smooth.. q7 s: ?/ u$ g {, X( @
Finally,the drc & lvs could be so easy to do . & O( `/ w! P5 L8 @+ E5 V& PBut the floorplan must be verified by designer.The thing of re-layout almost have not be happened.