Info on Tri-state logic

Discussion in 'Embedded Systems and Microcontrollers' started by VVS_curious_2_learn, May 16, 2008.

  1. VVS_curious_2_learn

    Thread Starter New Member

    May 16, 2008
    1
    0
    Hi thr,

    i m a new member, wanna know how tri-state logic helps with an RS 485 multi-drop network..
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,135
    1,786
    Well in order for a signal to propagate along a network with multiple transmitters, all but one of those transmitters MUST be in a high impedance state. If two transmitters are on at the same time and they are signalling opposite states then the signals have a hard time getting through.
     
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