Low power bus coding techniques considering inter-wire capacitances

The power dissipation associated with driving data buses can be significant, especially considering the increasing component of inter-wire capacitance. Previous work on bus encoding has focused on minimizing transitions to reduce power dissipation. In this paper, it is shown that transition reduction is not necessarily the best approach for reducing power when the effects of inter-wire capacitance are considered. An electrical model for data buses designed with submicron technologies is presented and a family of coding techniques is proposed that can reduce the average power consumption of the bus by 40%.

[1]  Kiyoo Itoh,et al.  Sub-1-V swing internal bus architecture for future low-power ULSIs , 1993 .

[2]  Alan N. Willson,et al.  Charge recovery on a databus , 1995, ISLPED '95.

[3]  Kiyoo Itoh,et al.  Sub 1V Swing Internal Bus Architecture for Future Low-Power ULSI's (Special Section on the 1992 VLSI Circuits Symposium) , 1993 .

[4]  Yuji Hatano,et al.  Data-Dependent Logic Swing Internal Bus Architecture for Ultralow-Power LSI's(Special Issue on the 1994 VLSI Circuits Symposium) , 1995 .

[5]  Anantha P. Chandrakasan,et al.  Low-Power CMOS Design , 1997 .

[6]  Naresh R. Shanbhag,et al.  A coding framework for low-power address and data busses , 1999, IEEE Trans. Very Large Scale Integr. Syst..

[7]  Hiroyuki Yamauchi,et al.  An Asymptotically Zero Power Charge-Recycling Bus Architecture for Battery-Operated Ultrahigh Data Rate ULSI's(Special Issue on the 1994 VLSI Circuits Symposium) , 1995 .

[8]  Benjamin Bishop,et al.  Databus charge recovery: practical considerations , 1999, Proceedings. 1999 International Symposium on Low Power Electronics and Design (Cat. No.99TH8477).

[9]  Hiroaki Misawa,et al.  Data-dependent logic swing internal bus architecture for ultralow-power lsi's. ieee j. solid-state , 1995 .

[10]  Mircea R. Stan,et al.  Low-power encodings for global communication in CMOS VLSI , 1997, IEEE Trans. Very Large Scale Integr. Syst..

[11]  Thomas A. DeMassa,et al.  Digital Integrated Circuits , 1985, 1985 IEEE GaAs IC Symposium Technical Digest.

[12]  Hui Zhang,et al.  Low-swing interconnect interface circuits , 1998, Proceedings. 1998 International Symposium on Low Power Electronics and Design (IEEE Cat. No.98TH8379).