swgchlry
Member level 4
the layout is generated by Encounter and Drc free. When I do LVS, calibre told me that there are some ports in the layout are missing from source netlist. I found that calibre regarded some "wire" nets of source netlist as ports and the top module of the netlist(generated from layout) has more input/output ports than the source netlist. Can sb. help me?
Layout netlist:
.Subckt XTop port1 port2 port3
...
.end
source netlist:
.Subckt XTop port1 port2
...
Xxx VDD VSS ... port3
...
.end
Why calibre move port3 to the top module's input/output port list?
Layout netlist:
.Subckt XTop port1 port2 port3
...
.end
source netlist:
.Subckt XTop port1 port2
...
Xxx VDD VSS ... port3
...
.end
Why calibre move port3 to the top module's input/output port list?