低功耗总线编码技术  

Low Power Bus Coding Approach

作　　者：尹立群[1] 冯庆[2] 袁国顺[1] 

机构地区：[1]中科院微电子研究所,北京100029 [2]中科院电子学研究所,北京100080

出　　处：《计算机工程》2008年第15期238-240,共3页Computer Engineering

摘　　要：为了降低总线翻转率通常对总线进行编码。B-I编码是这些编码方法中比较简单实用的一种编码方法。但在连续传输时,它对翻转率降低不明显。该文对B-I编码加以改进,在编码前进行连续与非连续的判断。在连续传输时采用渐进零翻转编码,从而使得总线进行连续传输时翻转率接近为零。改进后的编码对同一段程序,相对于B-I编码翻转率进一步下降了28.7%,面积增加了18 225μm2。The method of bus endoding is for cutting down the transition frequency. The Bus-Invert（B-I） coding is the most simple and practical. But the transition frequency reduction is not obviously during the sequential transfer. In this paper, it judges the type of sequential and non-sequential transfer and takes the method of asymptotic zero-transition activity encoding during the sequential transfer. Compared with the B-I coding method for the same program, it can cut down the transition frequency by 28.7% and area increasing byl 8 225μm^2.

关 键 词：先进微控制器总线结构 低功耗设计 总线编码 翻转率 B-I编码 

分 类 号：TN402[电子电信—微电子学与固体电子学]