I don't think we'll ever know. It is kind of amazing how secretive chip makers are despite the absolutely massive moat they enjoy. Not only is there a fabrication barrier to entry approaching the size of a small nation's GDP, but there is a maze of intellectual property laws backed by supranational leg breakers. And still they operate as if none of that existed and only trade secrets provide them any measure of competitive edge. Now imagine how bad it would be if the US military hadn't put multisource requirements in place...

I am very much looking forward to the day that their BS argument for secrecy might actually make some sense, because that'll be around the time that it becomes practical for businesses operating out of home garages to fabricate their own designs and start eating NXP's lunch.