一种快速的低压降电源/地网络设计方案

计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (26): 97-99.

一种快速的低压降电源/地网络设计方案

陈磊^1,2,陈岚¹

1.中国科学院计算技术研究所计算机系统结构重点实验室,北京 100080
2.中国科学院研究生院,北京 100080

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-09-11 发布日期:2007-09-11
通讯作者: 陈磊

Quick design method of low IR drop P/G mesh

CHEN Lei^1,2,CHEN Lan¹

1.Key Lab. of Computer System and Architecture,Institute of Computing Technology,CAS,Beijing,100080,China
2.Graduate University of Chinese Academy of Sciences,Beijing 100080,China

Received:1900-01-01 Revised:1900-01-01 Online:2007-09-11 Published:2007-09-11
Contact: CHEN Lei

摘要/Abstract

摘要： 在税控机SoC的物理设计中,对电源/地网络的设计流程做了较大地改进,提出了一种基于布线密度的设计方法：首先根据目标电压降确定各层金属电源/地线的布线密度,然后根据密度可有针对性的构架电源/地网络,大大提高了设计速度。另外,为降低占用了大量布线资源的电源/地网络对信号布线的不利影响,还对电源/地网络的布线宽度、间距和构架方式进行优化,提出了线宽、间距的计算公式,有效降低了设计的布线拥塞。最终实现了极低的电压降。

关键词: 电压降, 布线拥塞, 电源/地网络, 物理设计

Abstract: In the physical design of fiscal cash register SoC,a method based on routing density is introduced,first,determine metal layers’ power routing density to satisfy the exactly estimated target IR drop,then P/G mesh can be quickly constructed according to the density.With the help of optimized design flow,turn-around time is decreased enormously.In order to avoid serious congestion induced by the high density P/G routing,several techniques are introduced to reduce via walls and optimize the P/G mesh’s construction.Two formulas are proposed for computing the optimal P/G strap width and pitch.As a result,a SoC with low IR drop is achieved by a high density P/G mesh.

Key words: IR drop, routing congestion, P/G mesh, physical design

陈磊^1,2,陈岚¹. 一种快速的低压降电源/地网络设计方案[J]. 计算机工程与应用, 2007, 43(26): 97-99.

CHEN Lei^1,2,CHEN Lan¹. Quick design method of low IR drop P/G mesh[J]. Computer Engineering and Applications, 2007, 43(26): 97-99.