This paper presents a novel power estimation scheme for programmable systems consisting of predesigned datapath and memory components. The proposed hybrid methodology yields highly accurate estimates within short runtimes by combining high-level simulation with analytical macromodeling of circuit characteristics. To assess its effectiveness in practice, we implemented our hybrid scheme into a power estimation tool, called HYPE, and applied it to explore various architectural alternatives in the design of a 256-state Viterbi decoder and a Rijndael encryptor. For designs with about 1 million transistors, our estimator terminates within seconds. Compared with industrial gate-level power estimators, our approach is up to 1,000 times faster with 5.4% deviation on average.
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