The wholechip floorplan is very important before you start the layout. ) c+ r2 M& t1 h V2 n% tThen the position of output pin are fixed for each sub block,and the line drawing will be smooth.$ E$ |' I2 D; R% p2 |5 v6 ?/ @
Finally,the drc & lvs could be so easy to do .+ v( v" O9 Z5 D6 z$ O' \9 O
But the floorplan must be verified by designer.The thing of re-layout almost have not be happened.