2.9 GUI Mode Metal Only ECO Flow

Metal ECO can only use existing spare gates on the silicon. GOF controls how to use these spare gates.

2.9.1 Methods for Metal Only ECO

Four methods are supported in Metal Only ECO:

1. User can add any type of gates and let the tool map to the spare type gates, Place and Route tool should map the spare type gates to the exact spare gate instances
2. User can add any type of gates and let the tool map to the exact spare gate instances
3. User can add only spare type gates and let the tool map to the exact spare gate instances
4. User can pick the exact spare gate instances, and connect and disconnect up the instances in ECO

Note: 'Spare type gate' refers to the gate type, 'INVX2', 'NAND2X2'. 'Exact spare gate instance' refers to the spare instances in the design, E.G. 'spare1/spare_invx2'

2.9.2 Setup and use cases

The detail setup for four method can be found in GOF ECO Metal Only ECO. Use cases can be found in online document.