Coupling Transition Reduction on On-Chip Buses Using Adaptive Bus Encoding (ABE)

Abstract

This paper presents an adaptive encoding framework for the reduction of coupling transition activity in on-chip data buses. The technique relies on the observation of data characteristics over fixed window sizes and formation of cluster with bit-lines. The proposed method utilizes redundancy in space and time to prevent loss of information while retrieving data. Unlike off-chip buses, the focus is to decrease coupling transitions which consume higher power than switching transitions in this scenario. We present analytical and experimental results which demonstrate the activity reduction of our encoding scheme for various data sets.