What's the difference between sky130A and sky130B? I thought sky130B just added reram blocks, however my design uses no reram yet it fails LVS when I build with sky130A.

Does anyone know a tool that can generate/extract LEF from GDS?

I am using sky130 libraries and facing the following issue. I wrote the RTL for a simple DFF and synthesized it and ran the GLS on the netlist. The verilog model of the flop in sky130 lib seems to be wrong and i am seeing q pin to be floating in the GLS output. This is because the verilog model is using some signals *_DELAYED (like D_DELAYED , RESET_B_DELAYED, etc) in it which are not driven inside the model. Have posted the snippet of the model along with this post. Please share me if you are aware of any known workarounds / limitations . Thanks in advance for help._

Hi everyone, I am facing a 'missing symbol' error when opening Xschem. Could anyone help me resolve this issue?

Not sure where to post this.... It looks like gdsfactory used to allow plotting via matplotlib. But that is replaced with an odd live update interface to klayout... I just want to make images for an assignment and not have to render them through klayout Is there a way to plot to matplotlib?

is there any neat way to stop openroad from trying to place all of the logic in the small gap between macros rather than in the bigger area away from the macros? neither of the halo options seem to affect this even though they seem like a conceptually similar problem

There was a Stanford project on one of the early ChipIgnite runs that was using a 2 GHz transfer, although I don't remember if that was input, output, or both. 2 GHz is impossible on the GPIOs. It should be able to be achieved on the caravan bare pads, since they are not capacitively loaded.

Hey everyone. is the maximum operating frequency for sky130 IO 50MHz?

Can anybody tell the schedule of next mpw shuttle from efabless? I couldn’t find it on their site.

Hi all, I'm trying to install ihp open pdk in a docker container using the scripts on iic-osic-tools repo. Some questions arise • Is the compilation of the

.va

files into

.osdi

required to use the pdk? • Compilation of openvaf fails, and using the shared executables crash when using on

<http://psp103_nqs.va|psp103_nqs.va>

. How can I debug this? Or is it documented somewhere? Thanks for the effort put into making another free and open source PDK alternative 🙂