Product Documentation
OrCAD Capture User Guide
Product Version 17.4-2020, June 2020

Synchronizing Parts

Capture enables you to place parts in a design, modify the parts in the library, then update the design so that all of the modified parts reflect the changes you have made in the library. You can use the Update Cache command on the Design menu to do this.
When you use the Update Cache command, properties of the part are retained; however, the pin properties of the part instance are lost.

To update a part in the design cache so it matches a part in the library

  1. Using the part editor, edit the parts in the library as required.
  2. Open the project manager window for the design.
  3. Select the parts in the project manager.
  4. Choose Design – Update Cache command.
    The design cache and all part instances are updated to match the library parts.

When you copy pages from one design or library to another, parts displayed on the copied pages may appear different due to differences in each design or library cache. If a part is not already in the destination design cache, Capture will copy it from the source design's cache. Otherwise, it will use the part already present in the destination design's cache.

When you use the Replace Cache or Update Cache command, all properties of the part are retained, but the pin reflects the properties of the library part. This means you lose any changes made to pin properties after the part was placed, including those made by the Back Annotate or the Annotate tools.

The Replace Cache and Update Cache commands are quite similar, but they have the following differences:

If you move a library after you place a part, the connection between the part and its library is broken. In this case, the Update Cache command will not find the library; you will need to use the Replace Cache command and specify the new path to the library.

  • Using Replace Cache, you can replace multiple parts selected in the design cache with another single part.
  • Using Update Cache, you can update multiple parts at a single instance.