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Altera_Forum's avatar
Altera_Forum
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17 years ago

Cyclone III and MLVDS

Hi, All.

I am new here, so sorry if I posted this in a wrong place.

We are developing a boad that will use a Cyclone III device to communicate with other boards over the backplane. The idea is to have several boards transmitting signals to this Cyclone III device. Currently we are talking about a point-to-point connection, but in the future we might wish to resort to a bus that would connect all the boards over the backplane.

We wish to use some sort of LVDS connection that would enable us to build a bus later and will support live insertion as well. This leads us to either M-LVDS or B-LVDS.

At this stage, we are planning to have only one board with the Cyclone III device, all the other boards will have the appropriate (M-LVDS or B-LVDS) buffers.

The question is therefore:

1) Will Cyclone III communicate correctly with M-LVDS (this is the preferrable solution) buffers?

2) How can we make sure that the bus won't be affected by inserting / removing the board with the Cyclone device on it?

Thanks in advance,

Pavel

6 Replies

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

    well, I've read the doc and it anwers my question almost perfectly.

    the only thing is that we prefer to use MLVDS and not BLVDS. I know that these standards are much the same, but there is a slight difference in the voltages.

    My question is: will this difference affect the application?

    thanks a lot for your help.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    I'm not aware of the differencs in detail, but expect, that they are compatible in a practical view.