Partial bus-invert coding for power optimization of system-level bus

Abstract

We presen t a partial bus-in vertcoding scheme for power optim ization of system level bus. In the proposed scheme, we select a su b-group of bus lines in volv ed in b us enciondg to avoid unnecessary inversion of b us lines not in the sub - group thereby redu cing th e total n um ber of bus tran sitions. We propose a heuristic algorithm that selects the sub-grou p of bus lines for b us encodin g. Ex periments on benchmark examples in dicate that the partial bus-in vert coding reduces the tot al bus transitions b y 62.6% on the average, compared to that of the unencoded patterns.