Translating Designs with Black-Box Cells

It is possible that the design prior to translation has one such cell instantiated in it and the target library does contain an identical cell. Since DC does not see any functionality described, it is unable to translate this particular instance. A design with black-box cells can be translated by the following steps  

Identify the black-box cells in your design and then find the equivalent cells in the targetjibrary. 

Create a translation library for these black-box cells. For example, if your netlist has a black-box cell mem and your targetjibrary contains an equivalent cell mem new, then create a translation library which is essentially a module that instantiates the target cell mem new, but with the same interface as the mem cell as shown in Example 5.3. 

After the translation library has been created, convert the design to the db format using the read and the write commands. You have now created a block around the cell in the target library with an interface similar to the interface of the black-box 

ensure that the search path variable points to all the directories containing these libraries. 

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