Applying a data bus in real life

Discussion in 'Computing and Networks' started by Sparky49, Jun 21, 2012.

  1. Sparky49

    Thread Starter Well-Known Member

    Jul 16, 2011
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    Hi all.

    Looking at some schematics, I see they have data buses. How are these implemented in real life?

    Are they just a bunch of wires/traces which run along side each other, as in my diagram?

    Many thanks,

    Sparky
     
  2. wmodavis

    Well-Known Member

    Oct 23, 2010
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    Just like any other wire connection line on a schematic. It is an electrical connection using a conducting medium such as wire or a foil trace on a PCB which joins two or more components. Yup! In Real Life! No rocket science to it. The epitomy of simplicity.
     
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  3. takao21203

    AAC Fanatic!

    Apr 28, 2012
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    you would not want to have all the wires in the schematic...
     
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  4. Sparky49

    Thread Starter Well-Known Member

    Jul 16, 2011
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    Much neater indeed. So it's just a case of match up the pins? PS1 goes to P$1, in that case?
     
  5. cork_ie

    Active Member

    Oct 8, 2011
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    59
    Yep a databus is a bus with data on it, nothing very mysterious there. However in order to carry data the signal is modulated in some way or other eg. square waves. Depending the rate of data transmission, the impedence, inductance and capacitance of the connecting cables / tracks can have a significant impact on the rate of data transmission .
    Another interesting concept is twisted differential pairs eg. CAN where the data signal is transmitted in duplicate - one line an inversion of the other to make the bus less prone to interference. Most data lines also have a specific terminating resistance to avoid reflections
     
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