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Altera_Forum's avatar
Altera_Forum
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9 years ago

Cyclone IV LVDS input emulated

Hi,

The Cyclone IV handbook states that the top and bottom I/O banks used emulated LVDS transmitters, but I'm not seeing any comments on LVDS receivers. There is also an illustration showing the emulated transmitter but nothing on the receivers. Are the top and bottom LVDS receivers emulated as well? Is there any functional difference between the different banks' LVDS receivers?

Thanks,

Tobyn

2 Replies

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

    LVDS receivers use differential input stages which are available at all dedicated DIFFIO and DIFFCLK pin pairs. There's no thing like an "emulated LVDS receiver".

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

    There's no difference between the different bank's LVDS receivers - none are identified as 'emulated' - although, in practice, all of them are. Just terminate with 100R as per the handbook.

    Cheers,

    Alex