The wholechip floorplan is very important before you start the layout. 9 c4 z' M' d, z7 z9 o5 r }1 vThen the position of output pin are fixed for each sub block,and the line drawing will be smooth.4 c/ H' Q t: `# S& N/ i+ P
Finally,the drc & lvs could be so easy to do .1 F$ m, C7 E* a& v E7 u
But the floorplan must be verified by designer.The thing of re-layout almost have not be happened.