A Novel Data Bus Encoding with Low Coupling Transitions

LI Quan-quan; GU Da-ye; GONG Xiao-hua; LIU Xiao-ming; GUO Er-hui

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A Novel Data Bus Encoding with Low Coupling Transitions

更新时间：2026-09-04

- A Novel Data Bus Encoding with Low Coupling Transitions
- Vol. 33, Issue 11, Pages: 91-94(2016)
- 作者机构：
  
  中国电子科技集团公司第三十八研究所,安徽,合肥,230088
- 作者简介：
- 基金信息：
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- Published：2016
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李泉泉, 顾大晔, 龚晓华, 刘小明, 郭二辉. 一种低耦合翻转的数据总线编码方法[J]. 微电子学与计算机, 2016, 33(11): 91-94.

LI Quan-quan, GU Da-ye, GONG Xiao-hua, et al. A Novel Data Bus Encoding with Low Coupling Transitions[J]. 2016, 33(11): 91-94.
李泉泉, 顾大晔, 龚晓华, 刘小明, 郭二辉. 一种低耦合翻转的数据总线编码方法[J]. 微电子学与计算机, 2016, 33(11): 91-94. DOI：

LI Quan-quan, GU Da-ye, GONG Xiao-hua, et al. A Novel Data Bus Encoding with Low Coupling Transitions[J]. 2016, 33(11): 91-94. DOI：

摘要

针对片上系统中数据总线功耗显著的特点

提出了一种低耦合翻转的数据总线编码方法.利用数据总线前一时刻传输的数据对当前时刻需要传输的数据进行异或编码、同或编码

并将异或编码、同或编码、反转编码及原码中耦合翻转次数最少的数据送到数据总线上进行传输

有效降低了数据总线的功耗.实验结果表明

对于常用的32 bit数据总线

该编码方法可以将总线功耗降低33.06%

优于传统的CBI编码方法和E/O BI编码方法.

Abstract

Data bus consumes a large amount of energy in the system-on-chip. This paper proposes a novel data bus encoding with low coupling transitions to save the data bus power dissipation. The encoder utilizes the previous data on the data bus to encode the current data with XOR and XNOR operations

and chooses the data with minimal coupling transitions among XOR encoding data

XNOR encoding data

invert encoding data and the original data to send on the data bus. This method can reduce a majority of data bus coupling transitions

thus saving the data bus power dissipation significantly. Experimental results show that this method could save 33.06% of the common 32-bit data bus power dissipation

superior to the traditional CBI encoding and E/O BI encoding

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references

Zhang Y, Lach J, Skadron K, et al. Odd/even bus invert with two-phase transfer for buses with coupling[C] // Proceedings of the 2002 International Symposium on Low Power Electronics and Design. New York, NY, USA: ACM, 2002: 80-83.

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Sainarayanan K S, Ravindra J V R, Srinivas M B. A novel, coupling driven, low power bus coding technique for minimizing capacitive crosstalk in VLSI interconnects[C] // Proceedings of IEEE International symposium on Circuits and Systems. CA, USA: IEEE, 2006: 4155-4158.

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刘毅, 王乃迪, 杨银堂. 基于短循环程序特征的多模式低功耗编码算法[J]. 微电子学与计算机, 2008, 25(2): 104-106. DOI: 104

谢国梁, 凌翔. 联合不等能力保护和串扰避免的片上总线编码设计[J]. 重庆邮电大学学报, 2010, 22(5): 612-617. DOI: 612

Stan M R, Burleson W P. Bus-Invert coding for low-power I/O[J]. IEEE Transactions on Very Large Scale Integration Systems, 1995, 3(1): 49-58. DOI: 49

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