EXODUS: Inter-module bus-encoding scheme for system-on-a-chip

A novel bus encoding technique called EXODUS (exclusive or-xnor duo scheme) is presented which reduces the cross-coupling effect and switching activit ies in interconnects between macroblocks in systems-on-a-chip (SOCs). For 8 bit bus-lines, the proposed EXODUS scheme reduces the number of correlated switchings by 18% and reduces the worst case delay by 34% compared to the conventional bus-invert method. Because EXODUS uses an efficient encoding m ethod, area and power penalties resulting from additional encoding/decoding circuitry can be avoided.