Engineering change using spare cells with constant insertion
Engineering change using spare cells with constant insertion
复制标题
使用不断插入的备用电池进行工程变更
DOI：
10.1109/iccad.2007.4397321
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
M. Marek
中科院分区：
文献类型：
--
作者：
Yu;Ya‐Ting Chang;Shih;M. Marek
在超大规模集成电路设计过程中，设计实现往往需要纠正，因为新的规格或设计约束的冲突。这种修正过程被称为工程变更（EC）。通常，EC问题通过使用已插入芯片的未使用空间中的备用单元来解决。在本文中，我们提出了一种迭代方法来产生可行的映射解决方案的EC问题考虑备用细胞的输入可能会绑定到的ESTA或Gnd，称为常数插入。应用常数插入可以增加单元在功能方面的灵活性，因此远距离的备用单元不需要仅用于某些特定功能。我们的实验结果表明，在有足够的空闲单元的映射解决方案与常数插入的面积只有82%的面积没有常数插入。
In the VLSI design process, a design implementation often needs to be corrected because of new specifications or design constraint violations. This correction process is referred to as engineering change (EC). Usually, an EC problem is resolved by using spare cells, which have been inserted into the unused spaces of a chip. In this paper, we propose an iterative method to generate feasible mapping solutions for an EC problem considering spare cells whose inputs may be tied to Vdd or Gnd, called constant insertion. Applying constant insertion can increase a cell's flexibility in aspect of functionalities, so far-away spare cells need not be used just for some specific functionality. Our experimental results show that the area in which there are enough spare cells for a mapping solution with constant insertion is only 82% of the area without constant insertion.