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Cashing in on Legacy PCells In computer programs, caching is used to store the output from commonly used functions on the disk so that, when executing a repeated instruction, the results may be obtained more quickly without having to reprocess the request. This same mechanism can be used to speed up the display of parameterized cells (PCells) in custom IC design. Some Electronic Design Automation (EDA) tools cache PCells automatically for performance reasons; some require additional licenses; and others offer no caching at all. In addition to the performance benefits, PCell caching can be used to make tool-specific PCells visible in other tools in the design flow.
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