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SX chips talking - stategies — Parallax Forums

SX chips talking - stategies

BebopALotBebopALot Posts: 79
edited 2006-02-28 19:57 in General Discussion
Hi folks, I was split between posting this in the "Sandbox" versus the "SX Microcontroller" category. I am trying to get two SX chips to "talk" to each other. The two chips are seperated by 18" in physical distance. I want to connect 1 pin or maybe 8 pins on SX1 to SX2. Does anyone have a good idea on what components to use to cover that distance or more simply, what strategies? I have tried fiber optics for single pin connection which worked properly except that the .5-1 us switching time produced unaccetable propagation delays (the IR receiver module had an amp built into it). I want to keep it simple - HI/LO with fast swithcing time and low gate (pin) capacitance.

Thx in advance,

BBAL

Comments

  • Jon WilliamsJon Williams Posts: 6,491
    edited 2006-02-27 04:06
    18 inches or 18 feet? If the former, I would think twisted-pair copper wire would be just fine, particularly for serial transmission.

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    Jon Williams
    Applications Engineer, Parallax
  • BebopALotBebopALot Posts: 79
    edited 2006-02-28 03:01
    18 inches. If I wanted to connect a 4 or 8 bit register can I use a ribbon cable or something like that? Does the wire have to be significantly shielded and does one need to be concerned about frequency loss over long wires?
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2006-02-28 05:16
    That depends on the environment in which you intend to place your project -- better to be safe. You could use serial (twisted) pair and send whatever you want across a simple interface.

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    Jon Williams
    Applications Engineer, Parallax
  • BebopALotBebopALot Posts: 79
    edited 2006-02-28 19:57
    When you say twisted pair is the wire just a pair of twisted wires or several pairs? Can I find it at radio shack?
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