Allegro 中的约束规则设置Allegrophan刚好五个字修订记录日期版本描述作者2008-12V1.0初版，学完的总结。适用于Cadence15.5版本。Allegrophan2009-09-08V1.1小改，修改部分措辞Allegrophan2009-10-14V1.2小改，更正、修改几个错漏之处。添加一些说明性文字。感谢群里的佳猪、梦姑娘等朋友的指正！Allegrophan目录一：Physical（Line/vias）rule物理特性（线宽和过孔）约束设置：.............41）“Setvalues”设置约束特征值....................................................................52）“Attachproperty”绑定约束.....................................................................63）“Assignmenttable”约束规则分配........................................................8二 “Spacingrule”间距约束设置...........................................................................91）“Setvalues”设置约束特征值................................................................92）“Attachproperty”绑定约束.................................................................103）“Assignmenttable”约束规则分配......................................................11三 Constraintareas区域约束设置......................................................................12四 Allegro中走线长度的设置............................................................................131）差分线等长设置......................................................................................132）一组 Net等长..........................................................................................163）XNet等长................................................................................................17线宽、线距、区域的约束主要在“ConstraintsSys”中设置，点击“Setup/Constraints”或点击图标打开“ConstraintsSys”窗口，如下：“ConstraintsSys”窗口分两个级别，第一级别有两类：Standarddesign rules 和 ExteExtendedndeddesign rules。Standarddesignrules仅有一级分类，点击“Set standardvalues”设置默认约束值，如下：默认约束设置线宽约束设置间距约束设置区域约束设置这里可以设置默认值，窗口中所有设置值各自分属于 spacingrule和 ...
