open-source-silicon.dev

For the `skywater-pdk-libs-sky130_fd_sc_hd` cells the  `sky130_fd_sc_hd__diode_2.spice`  model makes reference a SPICE diode card called `sky130_fd_pr__diode_pw2nd`  from the `skywater-pdk-libs-sky130_fd_pr`  primitives. On searching the primitives I find a few variants on `sky130_fd_pr__diode_pw2nd`  (e.g. `sky130_fd_pr__diode_pw2nd_05v5` , `sky130_fd_pr__diode_11v0` , etc.) Should `sky130_fd_sc_hd__diode_2.spice`  be calling one of those in particular?

The `open_pdks` installer corrects this error to the `05v5` device.

Gotcha, `skywater-pdk-libs-sky130_fd_sc_hd` also seems to think `sky130_fd_pr__diode_pw2nd_05v5`  should be exposed as a subcircuit instead of the model card provided by `skywater-pdk-libs-sky130_fd_pr` how does the open_pdks installer resolve this?

open_pdks also changes the record from X to D.

They're just parasitic diodes.  They don't seem to have any particularly special models for them other than the basic SPICE diode model.