The wholechip floorplan is very important before you start the layout. r. F- m& T8 {6 r3 @
Then the position of output pin are fixed for each sub block,and the line drawing will be smooth.# s( n& J' t8 `9 j7 q: K
Finally,the drc & lvs could be so easy to do . & q6 C0 A# W# D% N- T; _9 U8 fBut the floorplan must be verified by designer.The thing of re-layout almost have not be happened.