Allegro中的约束规则设置1.1

Allegro 中的约束规则设置Allegrophan修订记录日期 版本描述作者2008-12V1.0初版，刚学完时的总结Allegrophan2009-08V1.1小改，修改部分措辞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：设置默认属性这里可以设置默认值，窗口中所有设置值各自分属于 spacingrule和 Physicalrule中名为“Default”的约束集。“Extended design rules”下一级分为三类不同约束设置：Spacingrule间距约束设置、Physical（Line/vias）rule物理特性（线宽和过孔）约束设置和 C...