Title :
Weight-based bus-invert coding for low-power applications
Author :
Lin, Rung-Bin ; Tsai, Chi-Ming
Author_Institution :
Dept. of Comput. Eng. & Sci., Yuan-Ze Inst. of Technol., Chung-li, Taiwan
Abstract :
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
Keywords :
Markov processes; VLSI; integrated circuit design; integrated circuit interconnections; integrated circuit packaging; low-power electronics; transient response; I/O power consumption; Markov chains; VLSI; address buses; bus width; closed-form formulas; high-speed I/O; limiting behavior; low-power applications; packaging; switching activity; transient behavior; weight-based bus-invert coding; Very large scale integration;
Conference_Titel :
Design Automation Conference, 2002. Proceedings of ASP-DAC 2002. 7th Asia and South Pacific and the 15th International Conference on VLSI Design. Proceedings.
Conference_Location :
Bangalore
Print_ISBN :
0-7695-1441-3
DOI :
10.1109/ASPDAC.2002.994897
