Patent ID: 7668997
Filing Date: 2010-02-23
Classification: G06F,H04L

Abstract:
1. A system, comprising: a central logic unit having a plurality of input ports; a plurality of devices wherein each device couples to the central logic unit by first and second unidirectional, point-to-point communication links, said first unidirectional, point-to-point communication link transfers data from the device to the central logic unit and the second unidirectional, point-to-point communication link transfers data from the central logic unit to the device; arbitration logic coupled to the plurality of input ports, the arbitration logic permits a request to be transferred through the central logic unit from a device to at least one other device; and validity logic coupled to the arbitration logic and that determines whether each request is valid; wherein each input port is associated with an input state device, a buffer coupled to the input state device, and a port multiplexer coupled to the buffer and the input state device, and wherein said validity logic couples to the state device and receives a control signal from the arbitration logic, and the validity logic provides an output signal to the port multiplexer.