OpenLane/docs/source/usage/custom_pdk_builds.md

Custom PDK Installations

The sky130 PDK variants pulled using make pdk include the following standard cell libraries:

• sky130_fd_io
• sky130_fd_pr
• sky130_fd_sc_hd
• sky130_fd_sc_hvl
• sky130 sram modules

If you need other libraries (including the ReRAM library for sky130B), you will have to download them using Volare as shown below.

Start a venv shell using make start-build-env. You should see a prompt looking kind of like this:

(venv) [user@host openlane]$ 

Then, download the libraries as follows: The -l options are the libraries you want to include. For example, to download sky130_fd_sc_hs, you can add -l sky130_fd_sc_hs to your current set of libraries using the following command:

volare enable --pdk sky130 -l sky130_fd_sc_hs

You can also add -l all to just include all of them:

volare enable --pdk sky130 -l all

After it is done, your new SCLs are ready to use.