As far as I know, we can generate a LEF file of a block after place&route using Encounter. After that, we can extract information of the block layout using Abstract, and then generate another LEF file. What's the difference between the two? and which one should we use in top level place&route? Thanks
Please check both lef files and see the difference . I think the lef from abstract will be having the right block definitions like site information MACRO type information etc.
Lef after abstract generator is used in top level designs. I am not sure if the other one can not be used .
In Encounter, after place&route, I use the command lefOut ../results/***.lef -stripePin -PGpinLayers 5 6
It seems that the difference is mainly about power pins when there are stripes