Method and apparatus for transmitting information on a wired-or bus

  • US 5,659,689 A
  • Filed: 03/01/1994
  • Issued: 08/19/1997
  • Est. Priority Date: 03/01/1994
  • Status: Expired due to Term
First Claim
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1. A method for communicating information on a multiple-driver wired-OR signal line of a signal transmission bus that includes a clock line providing a clock signal, the bus having a plurality of bus agents connected thereto, said method comprising the steps of transmitting signals by:

  • observing a commonly observable event on said bus;

    selectively asserting a high-to-low signal voltage transition onto said multiple-driver signal line, said high-to-low transition being asserted two clock cycles following observation of said commonly observable event; and

    if a high-to-low transition is asserted, then asserting a low-to-high signal voltage transition onto said multiple-driver signal line one clock cycle after assertion of said high-to-low transition.

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