How to choose wire_load_mode provided by Foundry when do lo
时间:12-12
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There are several type of wire_load_mode provided by Foundry, how to choose wire_load_mode provided by Foundry when do logic synthesis or STA ???
Could anybody kindly tell me the basic or primary principle to choose the type of wire_load_mode ?
Thanks,
Eric
Could anybody kindly tell me the basic or primary principle to choose the type of wire_load_mode ?
Thanks,
Eric
based on your chip area, selected relative model
wire_load_mode
segmented, top, enclosed?
只是决定整个chip的线负载模式
top模式下,所有的子模块均选用和顶层模块相同的先负载模型,如果你的设计要flatten一般来说选择这个模式
enclosed是指选择包含该导线的最小模块的线负载模型作为该连线的模型,如没有,则向上
追溯。当一个大的模块放置比较集中时,enclosed比较精确。
而segmented则会把wire分段按所在的层次区域指定先负载模型,这个和foundary的工艺库有点关系,一般里面需要包含有线网分段特性时才会用这个模式。
老知识了,现在不一定适用。