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Altera_Forum's avatar
Altera_Forum
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14 years ago

What is an LVDS board and what does it do?

Trying to isolate a fault between a logic board and LVDS board, need to know what function an LVDS board performs? Anyone help me please?

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

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    Trying to isolate a fault between a logic board and LVDS board, need to know what function an LVDS board performs? Anyone help me please?

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    It would help if you could post a link or some details on the LVDS board.

    If the board contains only level translators, then its probably just converting from single-ended LVCMOS to LVDS.

    To debug the problem, use a scope and generate toggles on each of your single-ended signals. Follow the traces to the LVDS board, and see if the outputs are toggling.

    If the outputs are failing in groups, check the output-enables on the LVDS buffers. I use parts from National Semiconductor that are 9-bit LVDS level translators, and that is one failure I have seen. I've also seen inputs, outputs, or just one side of the output LVDS pair not being driven due to bad solder joints.

    Cheers,

    Dave