Hello, Does openROAD have no effect on area after pnr for timing constraint? I am asking because when I change clk period to 10x, 100x, 1000x with sky130hd ibex, area after pnr size does not change. What am I doing wrong? Any answers would be appreciated🥹 #openroad #openlane

Just check for each clock period synthesis netlist. Other than that you will get more positive slack and small change in area. You're using OpenLane or

OpenROAD-flow-scripts

?

Yes! I use OpenROAD-flow-scripts. When I changed clk period 50 500 5000 but area change is so small like 158392 157755 157469.. I thought that change is too small. And there synth_stat total cell area are same. How Area change be more big?

Better increase area with

DIE_AREA

and

CORE_AREA

variable through

<http://config.mk|config.mk>