Coding for Minimizing Energy in VLSI Interconnects

Abstract

Abstract-In CMOS VLSI circuits, the dynamic power dissipation contributes a significant fraction in the overall power dissipation. Hence, the main target of VLSI designers is to minimize the switching activity on the on-chip bus lines. In this paper, the authors propose a novel bus encoding technique which minimizes both self and coupling transition activity to curtail the global power dissipation. The performance of the proposed coding scheme has been tested on various SPEC'95 benchmarks and found that with respect to unencoded data, an average reduction of 28% and 26% with respect to self and coupling energies in the total power dissipation is achieved. The hardware, used for encoding and decoding purposes, has been designed using Magma c tools.

Low Power Design Methodology

“…1or1! 0 on bus with reference to the previous data on it [5]. Energy transition analysis is shown in Table 1.…”

“…1or1! 0, between two adjacent bus wires [5]. The corresponding energy transition analysis is shown in Table 2.…”

An Octo Coding Technique to Reduce Energy Transition in Low Power Vlsi Circuits

“…Such techniques are bus invert coding [1] is the best method to reduce the self transitions. Bus regrouping [18] DSM bus invert coding [7] low power bus coding techniques considering inter wire capacitance [2], portioned bus coding for energy reduction [9] methods are efficient methods to reduce the coupling transitions coding for minimizing energy in VLSI interconnect [6] and an efficient switching activity reduction technique for on -chip data bus methods reduce both self and coupling transitions. but most of the methods consider only one type of encoding technique to reduce power dissipation .while this paper considers both self and coupling transitional activities to reduce the power dissipation by octo-encoding technique in an on -chip data buses.…”

“…ENERGY Consumption is one of the major key aspects in the design of VLSI circuits [8] As the technology scales down to deep submicron technology, the bus energy reduction has become more and more important [9] so for all the researchers were worked on reducing transition activity on buses Bus invert coding [1], shift invert coding [3], Rotate coding [4], coding for energy reduction in VLSI interconnects [6].Low power design is becoming a new era in VLSI technology, as it impacts in many applications to optimize the power dissipation of digital systems in low power technology must be implemented through the design process from system level to process level. Power is a means of the rate of energy consumption.…”