OrCAD->Edit->brower->part

如果在occurrences裡更新屬性就會發現instance屬性和occurrence屬性不一樣（properties下白色行和黃色行不一致），一致的方法一是Design->remove occurrence properties但是之前在occurrences更新的屬性就會不見。

所以更新屬性的時候最好選用Use instances

方法二是找到更新的值並且將黃色區域1的值複製到白色區域2 然後儲存

方法三使用xxx.UPD檔案進行更新。。。

Part Instances and Occurrences

Apart instanceis a part you have placed on a schematic page. A partoccurrenceis created each time the part instance occurs in a schematic that is within the design hierarchy. So, for example, placing a part on a schematic page in your design creates both an instance and an occurrence. You can assign properties to the part instance, in which case the property (and its associated value) will "shine through" to each part occurrence unless the value is specifically replaced by a value on an individual part occurrence.The Property editor window

The instance property values shines through to the occurrence as long as the occurrence property values have not been edited in any way. When you explicitly edit an occurrence property value or when Capture modifies it via one of its tools, the occurrence values overrides the instance value. Only the occurrence value will be placed in the netlist.

How Capture uses instance and occurrence properties

The type of property you update or use in Capture depends on the type of project in which you are working. If you are working with an FPGA project or a PSpice project, Capture allows you a choice, but defaults to update instances when you use the Annotate, Update Properties or Export Properties commands. It is best that you use instances to create Cross Reference and Bill of Materials reports, as well.
When you work with a PCB or schematic project, it is best to update occurrences when you use the Annotate, Update Properties, and Export Property commands. In these projects, Capture also uses occurrences to create reports with Cross Reference and Bill of Materials.

Icon

While modifying occurrence properties, open only one occurrence at a time.

The EDIF 2 0 0, VHDL, and Verilog netlist formats generate true hierarchical netlists. Capture uses the instance property values on nets and parts when it generates a netlist for a design with one of these formats. All other netlist formats in Capture produce flat netlists and use occurrence property values.

Preferred modes for design processing

Capture determines and recommends a preferred mode for processing your design based on the type of project flow, type of design with respect to complex or simple hierarchy, and whether occurrence properties already exist on the design.
TheCross Reference Parts dialog boxis an example of where you can choose to use instances or use occurrences as the preferred mode.