What is the difference between nfet_01v8_lvt and nfet_01v8_lvt_nf?

Hi All, I am trying to run ngspice for a .spice generated through xschem as a test run and getting these errors < Error: could not find include file ../../libs.ref/sky130_fd_pr/spice/sky130_fd_pr__nfet_01v8__tt.corner.spice ERROR, library file /user/local/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice, section definition tt not found ERROR: fatal error in ngspice, - Can someone please help me to understand what's happening ?

I am getting an error in the openlane flow like:

[ERROR GRT-0076] Net CONTROL_LOGIC.SRAM12_WRAPPER.ram_din0\[0\] not properly covered.
Error: resizer_routing_timing.tcl, 67 GRT-0076
[ERROR]: during executing openroad script /openlane/scripts/openroad/resizer_routing_timing.tcl
[ERROR]: Exit code: 1
[ERROR]: Last 10 lines:
child process exited abnormally

What does this “not properly covered” mean?

Beginner / getting started questions: 1. I installed openlane and ran the regression test. I got 31 PASSes and 11 FAILS. Is that normal? 2. I'm really unfamiliar with Docker 😞 I'd like to try out magic, yosys and klayout (not as part of a flow). How do I start magic for example (without installing it separately)? (I tried make mount and then magic but it complains that DISPLAY isn't set, and so on. I tried ./flow.tcl -interactive -d mydesign and then run_magic but it says it can't read ::env(PDK)... and so on. Basically, I don't know how to specify a magic.rc file, nor the technology 😞

Hi, any idea why these come -

Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read
Cell sky130_fd_sc_hd__clkbuf_1 couldn't be read

Thanks

@Matt Venn @Uri Shaked I am traveling today. Can you rerun fill in the next 24 hours? I can pick it up tomorrow morning my time. Also, regarding the missing mcon, you can add that too. Or I can add it. Let me know.

Hi to all. What is a guard-ring? How can I tell if my (quite complex) circuit needs them? I'm using a non-standard CMOS design, although I do use discrete voltage levels.

Please assist me in determining whether this circuit operates as a monostable and how to obtain square wave output if it does.

I'm trying to compile my makefiles, but this extension 'zicsr' is missing. I'm using gcc version 13. I have searched everywhere but didn't find a way to add this extension to my toolchain. What's the solution? Do I need to install older version of riscv toolchain?

Magic is extracting

sky130_fd_pr__pnp_05v5_W0p68L0p68

as

sky130_fd_pr__rf_pnp_05v5_W0p68L0p68

causing LVS to fail when using netgen. If I remove the 'rf_' manually from the Magic-extracted netlist, LVS passes. Anybody seeing the same issue with bipolars?