A programmable logic device (PLD) includes programmable logic circuitry and a bridge circuitry. The bridge circuitry includes a first interface circuitry and a first signal select circuitry. The first signal select circuitry couples to the first interface circuitry and the programmable logic circuitry....http://www.google.com/patents/US7350013?utm_source=gb-gplus-sharePatent US7350013 - Bus communication apparatus for programmable logic devices and associated methods
