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OpenRAM/PORTING.md

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Porting to a New Technology

If you want to support a new technology, you will need to create:

  • a setup script for each technology you want to use
  • a technology directory for each technology with the base cells

We provide two technology examples for SCMOS and FreePDK45. Each specific technology (e.g., FreePDK45) should be a subdirectory (e.g., $OPENRAM_TECH/freepdk45) and include certain folders and files:

  • gds_lib folder with all the .gds (premade) library cells:
    • dff.gds
    • sense_amp.gds
    • write_driver.gds
    • cell_1rw.gds
    • replica\_cell\_1rw.gds
    • dummy\_cell\_1rw.gds
  • sp_lib folder with all the .sp (premade) library netlists for the above cells.
  • layers.map
  • A valid tech Python module (tech directory with __init__.py and tech.py) with:
    • References in tech.py to spice models
    • DRC/LVS rules needed for dynamic cells and routing
    • Layer information
    • Spice and supply information
    • etc.