Rare earth syndrome: PHY IP analogy

If you ask to IP vendors selling functions, PHY or Controller, supporting Interface based protocols which part is the master piece, the controller IP only vendors will answer: certainly my digital block, look how complex it has to be to support the transport and logical part of the protocol! Just think about the PCI Express gen-3 specification, counting over 1000 pages... Obviously, the PHY IP vendor will claim to procure the essential piece: if the PHY does not work 100% according with the specification, nothing works! Now, would you ask me to answer this question, I will reply… by a question: do you know anything about the rare earth element case?

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