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FPC402: What to do with unused ports on PWB design

Part Number: FPC402


I am planning to use an FPC402 to control two SFP+ connectors. Does anything need to be done with the two unused ports on the CCA design, or can all of their signals be left unconnected? I know that there is a 2-port controller available but my team already has experience with the FPC402 so we want to stick with it on this new design.