2000 · 169 citations · 15 references
EngineeringComputer EngineeringElectrical EngineeringComputer ArchitectureLow-power DesignSystem-on-chip DesignDynamic Power ReductionIntegrated Circuit DesignInterconnect ArchitectureInterconnect DesignLow-power Digital Circuit DesignMixed-signal Integrated Circuit DesignBus ArchitectureBus EncodingBus Encoding For Power ReductionDecoder DesignEncoder-decoder ArchitecturesInterconnect Power OptimizationOn-chip InterconnectsVlsi Implementation
Coupling effects between on-chip interconnects must be addressed in ultra deep submicron VLSI and system-on-a-chip (SoC) designs. We obtain the lower and upper bounds on coupling effects for randomly distributed, independent data streams based on the information theory. Novel low-power bus encoding scheme is proposed to minimize coupled switchings which dominate the on-chip bus power consumption. The coupling-driven bus invert method employs encoder and decoder that are geared to minimize the coupled transition activities. Experimental results indicate that our encoding method saves effective switchings as much as 30 % in an 8-bit bus with one-cycle redundancy. 1
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