Issue No. 04 - July/August (2002 vol. 19)
<p>Poor CAD support hinders wide acceptance of asynchronous methodologies, and asynchronousdesign tools are far behind synchronous commercial tools. A new design flow, NCL_X, based entirely on commercial CAD tools, targets a subclass of asynchronous circuits called null convention logic. NCL_X shows significant area improvement over other flows for this subclass.EDA FLOWS are industry driven and thus use synchronous methodologies as de facto standards. However implementation problems arise from imposing a synchronous model of operation on deep-submicron circuits. This problem motivates the investigation of other asynchronous modes of operation. Acceptance of new design methodologies including asynchronous ones engineering and industrial communities depends on three major issues: added value of the methodology in terms ofarea power speed electromagnetic interference (EMI) noise immunity and so on; tradeoffs which design parameters often worsen to achieve added values such as speed versus power and area versus EMI; and the cost of switching to the new methodology including training time development of new libraries and time spent dealing with CAD tool immaturity.</p>
A. Kondratyev and K. Lwin, "Design of Asynchronous Circuits Using Synchronous CAD Tools," in IEEE Design & Test of Computers, vol. 19, no. , pp. 107-117, 2002.