This paper presents an overview of the experience at Digital Equipment Corporation's LSI plant with VLSI IC CAD systems. Digital's VLSI CAD group has been involved in the development and use of two generations of VLSI CAD systems, and the paper will discuss these experiences, emphasizing some of the trade-offs in the selection of the individual tools as well as the design of the kernel and data manager parts of the systems.
The development of the first generation system and tools occurred in parallel with a major multi-chip IC design project 13 and in conjunction with the evolution of a major silicon (NMOS) process for Digital. While a great deal was salvaged from this severe learning experience (and note that all the IC's were nevertheless successfully completed), many aspects of the tools and system needed a complete overhaul for our next generation of IC's. We are now entering the phase of utilizing the results of this second generation custom MOS CAD system development. In parallel, we embarked on a separate and yet ultimately complementary development - that of a set of semi-custom CAD systems and associated tools. These too are now just being exploited to the full by Digital's VLSI IC design community.
Our first generation (
本文概述了Digital Equipment Corporation的配备VLSI IC CAD系统的LSI工厂的经验。 Digital的VLSI CAD团队已经参与了两代VLSI CAD系统的开发和使用,并且本文将讨论这些经验,着重强调了在选择单个工具以及内核设计方面的一些权衡取舍。和系统的数据管理器部分。 P>
第一代系统和工具的开发与大型多芯片IC设计项目13同时进行,并且与数字化的主要硅(NMOS)工艺一起发展。尽管从这种艰苦的学习经历中可以挽回很多麻烦(并且请注意,尽管所有的IC都已成功完成),但工具和系统的许多方面仍需要对我们的下一代IC进行彻底的检查。我们现在进入利用第二代定制MOS CAD系统开发结果的阶段。同时,我们着手进行单独但最终互补的开发-一套半定制CAD系统和相关工具的开发。 Digital的VLSI IC设计社区现在也正充分利用这些资源。 P>
我们基于
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