Routing and Unrouting Macros in Your Design

FPGA Editor GuideChapter 5: Working with Physical Macros

Routing and unrouting macros is similar to routing and unrouting components. These operations are described in the “Routing and Unrouting” section of the “Using the FPGA Editor” chapter.

To select a macro for automatic routing, you must display a list of placed macros in the List window, and then select the name of the desired macro.
When you place a macro, any pre-routed connections are automatically routed after the macro is placed. You cannot unroute these connections in your design.
When you place a macro without the Automatic Routing option enabled, any internal connections that are unrouted in the macro's library file are unrouted after the macro is placed. You must perform a separate route operation to route these connections.
When you automatically route a macro, each external pin connected to a net is routed. Also, any nets that are not pre-routed are automatically routed.