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What are the allowable values for the PIN_EE_MODEL parameter, and what are their definitions?

Peter Evans

If you go to Design Integrity --> Configure --> Electrical Stress Settings in System Capture X, and select an instance of a component in your design such as Devices --> IC, you'll note that Cadence gave us the option to export the pin properties to a CSV file.

I am looking for an exhaustive list of allowable values for the PINUSE and PIN_EE_MODEL fields, and their respective definitions.

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    PINUSE

    The PINUSE property, attached to a pin, indicates its pin type. This value overrides any pinuse value specified in the device file. Pinuse code values are: IN, OUT, BI, TRI, OCA, OCI, POWER, GROUND, NC, and UNSPEC. Set PINUSE property to IN/OUT to accurately model your circuit design.

    For information on this property mapping to Allegro PCB Router, see the Routing the Design user guide in the your documentation se

    Purpose

    PIN_EE_MODEL tells the tool how a pin behaves electrically in simulations and constraint checks — for example, whether it is an input, output, bidirectional, power, ground, etc.

    Common Allowable Values

    While the exact list can vary depending on your Cadence library setup and simulation environment, typical values include:

    Value Meaning
    INPUT Pin is an input-only signal.
    OUTPUT Pin is an output-only signal.
    BIDIR or BIDIRECTIONAL Pin can act as both input and output.
    TRI or TRISTATE Pin can be in high-impedance state.
    POWER Power supply pin (e.g., VCC, VDD).
    GROUND Ground reference pin.
    PASSIVE Passive connection (e.g., resistor lead, capacitor terminal).
    NC No-connect pin (not used in the design).
    OPEN_COLLECTOR Open-collector output type.
    OPEN_EMITTER Open-emitter output type.
    ANALOG Analog signal pin.
    UNSPECIFIED No specific electrical model assigned.

    Hope it answer your query.

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