Characterization of Asynchronous Templates for Integration into Clocked CAD Flows

  • Authors:
  • Kenneth S. Stevens;Yang Xu;Vikas Vij

  • Affiliations:
  • -;-;-

  • Venue:
  • ASYNC '09 Proceedings of the 2009 15th IEEE Symposium on Asynchronous Circuits and Systems (async 2009)
  • Year:
  • 2009

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Abstract

Asynchronous circuit design can result in substantial benefits ofreduced power, improved performance, and high modularity. However,asynchronous design styles are largely incompatible with clocked CAD,which has prevented wide-scale adoption. The key incompatibility istiming. Thus most commercial work relies on custom CAD or untimeddelay-insensitive design methodologies. This paper proposes a newmethodology, based on formal verification and relative timing, tocreate and prove correct necessary constraints to support asynchronousdesign with traditional clocked CAD. These constraints support timingdriving synthesis, place and route, and behavior and timing validationof fully asynchronous designs using traditional clocked CAD flows.This flow is demonstrated through a simple example pipeline in IBM's65nm process showing the ability to retarget the design for improvedpower and performance.