Circuitry for providing external access to signals that are internal to an integrated circuit chip package. A plurality of N:1 multiplexers are physically distributed throughout the integrated circuit die. Each of the multiplexers has its N inputs coupled to a nearby set of N nodes within the integrated...http://www.google.com/patents/US6003107?utm_source=gb-gplus-sharePatent US6003107 - Circuitry for providing external access to signals that are internal to an integrated circuit chip package
