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一、前言 集成电路设计和工艺技术的进步。使得集成度以每一年半翻一番的速度进展,每个芯片上包含的功能越来越大, 除了存储器和微处理机这些标准的电路之外,为某一用户特殊使用的专用电路的比例将越来越大,据估计,到1990年,专用电路将占LSI的一半以上。可是设计大规模的专用电路,按传统的设计方法将花费大量的时间和成本,为解决这一矛盾,产生了半定制设计方法,这就是仅仅改变一个或少数工序便可改变电路品种的集成电路设计方法。
I. INTRODUCTION The progress of integrated circuit design and process technology. Making integration progress at half the rate of doubling every year, each chip contains more and more functions, in addition to memory and microprocessors these standard circuits, for a particular user-specific circuit The proportion will increase, it is estimated that by 1990, dedicated circuits will account for more than half of LSI. However, the design of large-scale dedicated circuits, according to the traditional design method will spend a lot of time and cost, in order to solve this contradiction, resulting in semi-custom design method, which is only one or a few processes can change the circuit variety of integrated circuits Design method