全局布线(global routing)为 nanoroute 或 final route 做好准备。全局布线的作用就是预估拥塞以及时序,及时的发现问题 www.openrisc.com.cn|基于16个网页 2. 总体布线 布线:通常布线分为总体布线(Global Routing)和详细布线(Detailed Routing)两步总体布线把线网分配到合适的布线区域不关心 … ...
This chapter focuses on routing, a process that determines the precise paths for nets on the chip layout to interconnect the pins on the circuit blocks or pads at the chip boundary. These precise paths of nets must satisfy the design rules provided by chip foundries to ensure that the ...
在GR(Global Routing)阶段会把布线的区域划分为一个个矩阵块叫做GCell,根据给出的这些GCell,GR能够建立一个粗粒化的三维布线图(Coarse-grained 3D routing graph)。在这些三维的布线图中,Capabilities和多种Constraints能够分配到边(Edge)与顶点(Vertex),以便整体的routing的拓扑结构(topology)和金属层的分配(layer a...
Many competitive global routers adopt the technique of compressing the 3D routing space into 2D in order to handle today's massive circuit scales. It has been shown as an effective way to shorten the routing time, however, quality will inevitably be sacrificed to different extents. In this pape...
While primarily intended for global routing, they can be certainly extended for detailed routing or routing congestion estimation. In conjunction with the previous ISPD placement contest benchmark suite, the new global routing benchmarks will present realistic and challenging physical design problems of ...
Interconnect performance predictiion models are generated through simulations. The global routing results and performance prediction models are used to generate bounds on the net lengths which can be used by a detailed router to satisfy constraints on interconnect performance....
We introduce the single-layer global routing problem (SLGRP), also called homotopic routing or rubber-band-equivalent routing, and propose a technique for solving it. Given a set of nets, the proposed technique first determines the routing sequence based on the estimated congestion, the bounding-...
Cadence IC官方手册:Global Routing with the Virtuoso Chip Assembly Router 热度: Internet Routing Architectures 热度: Routing_Basics 热度: 5 Chapter 5 Global Routing 5 5 Global Routing...131 5.1 Introduction... 131 5.2 Terminology and Definitions ......
These techniques not only address the routing congestion measured at the edges of global routing grids but also minimize the total wirelength and via usage, which is critical for subsequent detailed routing, yield, and manufacturability. Experimental results show that FastRoute is highly effective and...
To ensure that physical implementation problems can be manageable and converged in a reasonable runtime, placement/routing problems are usually split into several sub-problems: global placement, legalization, detailed placement, global routing, and detailed routing. The global placement stage finds the ...