Optimal module and voltage assignment for low-power

Deming Chen, Jason Cong, Junjuan Xu

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Reducing power consumption through high-level synthesis has attracted a growing interest from researchers due to its large potential for power reduction. In this work we study functional unit binding (or module assignment) given a scheduled data flow graph under a dual-Vdd framework. We assume that each functional unit can be driven by a low Vdd or a' high Vdd dynamically during run time to save dynamic power. We develop a polynomial-time optimal algorithm for assigning low Vdd to as many operations as possible under the resource and time constraint, and in the same time minimizing total switching activity through functional unit binding. Our algorithm shows consistent improvement over a design flow that separates voltage assignment from functional unit binding. We also change the initial scheduling to examine power-latency tradeoff scenarios. Experimental results show that we can achieve a 21% power reduction when latency bound is tight. When latency is relaxed by 10 to 100%, the power reduction is 31 to 73% compared to the synthesis results for the case of single high Vdd without latency relaxation. We also show comparison data of energy consumption under the same experimental setting.

Original languageEnglish (US)
Title of host publicationProceedings of the 2005 Asia and South Pacific Design Automation Conference, ASP-DAC 2005
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Print)0780387368, 9780780387362
StatePublished - 2005
Externally publishedYes
Event2005 Asia and South Pacific Design Automation Conference, ASP-DAC 2005 - Shanghai, China
Duration: Jan 18 2005Jan 21 2005

Publication series

NameProceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC


Other2005 Asia and South Pacific Design Automation Conference, ASP-DAC 2005

ASJC Scopus subject areas

  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering


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