In Allegro® Package Designer Plus prior to the HotFix 019 of release 17.4-2019, any component of type IC in the design shows up in Die-stack Editor. If these are off-the-shelf components, you do not want to see them in Die-stack Editor. To stop such off-the-shelf components from appearing in Die-stack Editor, you would change the Class definition of the component to discrete. However, changing the Class definition breaks other integration flows like simulations and syncing with logical design applications. In HotFix 019 of 17.4-2019 release, Allegro Package Designer Plus provided a new mechanism to achieve this without changing the Class definition. You can now add a new property, Comp_Subtype, to mark a die as an off-the-shelf component. In this blog, we will discuss this property and its uses in detail.
You can mark any die as an off-the-shelf component by assigning the Comp_Subtype property to it, and then assign an appropriate value to the property by following these steps:
In the following image, note that the Comp_Subtype property can be assigned one of the several available values from the Value drop-down list.
A die with this property value does not show up in Die-stack Editor.
Let’s look at the other values available for the Comp_Subtype property.
Assigned by default to all new standard dies created in Allegro Package Designer Plus using commands, such as die generator or die text in. These components will be shown in Die-stack Editor.
Assigned by default to all new standard packages created in Allegro Package Designer Plus using either BGA generator or BGA text in commands.
Can be assigned to components of Class IC or IO. Packages can be assigned as type LGA.
Can be assigned to components of Class IC or IO. Packages can be assigned as type QFP.
Can be assigned to components of Class IC or IO. Packages can be assigned as type QFN.
Can be assigned to components of Class IO. This value is not supported for Class IC or Discrete.
Can be assigned to components of Class Discrete. This value is not supported for Class IC or IO.
The above-mentioned property values are the foundations for future enhancement in the tool. You can select a value according to the usage of the component.
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