Layout driven re-synthesis for low power consumption LSIs

  • Authors:
  • Masako Murofushi;Takashi Ishioka;Masami Murakata;Takashi Mitsuhashi

  • Affiliations:
  • Semiconductor DA & TEST Engineering Center, DA Development Dept., Kawasaki 210, Japan;Semiconductor DA & TEST Engineering Center, DA Development Dept., Kawasaki 210, Japan;Semiconductor DA & TEST Engineering Center, DA Development Dept., Kawasaki 210, Japan;Semiconductor DA & TEST Engineering Center, DA Development Dept., Kawasaki 210, Japan

  • Venue:
  • DAC '97 Proceedings of the 34th annual Design Automation Conference
  • Year:
  • 1997

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Abstract

A new technology re-mapping method named LDR (LayoutDriven Re-synthesis), which is applied after placement, is proposed.LDR executes re-mapping and re-placement simultaneouslyin order to minimize power consumption with placementinformation.High switching activity nets are concealed insidethe re-mapped cells or are shortened by re-placement in LDR.To estimate power consumption, LDR uses static power estimatorfor combinational circuits.LDR also calculates wirecapacitances accurately based on placement information toevaluate power.Experimental results show that 20% powerreduction compared with original circuits is performed by proposed method.