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SoC (System on a Chip) is a powerful solution to increase system performance and to reduce system cost, in particular for digital consumer products. SoCs for DVD, DTV, DSC, DVC, and cellular phone are current main LSI products for the digital consumer market. However current SoC has tough issues. 1.1 Increase of development time and cost System complexity has increased along with increase of transistor number. Perfect system verification in a short time is vital. Furthermore physical level verification has become tough, due to the signal integrity and reliability issue. Mask cost becomes much expensive. Reduction of re-spin is needed. These increase the development time and cost. 1.2 Increase of kind of devices and processes Current scaled CMOS device and process has tough tradeoffs, not every performance will increase with scaling. The most seriou