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...