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Weight-based bus-invert coding for low-power applications

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2 Author(s)
Rung-Bin Lin ; Dept. of Comput. Eng. & Sci., Yuan-Ze Inst. of Technol., Chung-li, Taiwan ; Chi-Ming Tsai

Carried out a comprehensive study on the weight-based, in contrast to the Hamming-distance-based, bus-invert method for reducing I/O power consumption. The closed-form formulas derived from the Markov chains depicting the transient and limiting behaviors of the bus-invert method are employed to compute the weight and switching activity, to explain the diminishing returns on the weight with increasing bus width, to show the nonviability of partitioning a bus into smaller buses with odd number of bits. Neither the Hamming-distance nor the weight-based approach can simultaneously reduce the weight and switching activity, but the latter outperforms the former in reducing the sum of weight and switching activity

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Design Automation Conference, 2002. Proceedings of ASP-DAC 2002. 7th Asia and South Pacific and the 15th International Conference on VLSI Design. Proceedings.

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