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Altera_Forum's avatar
Altera_Forum
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18 years ago

Cyclone II ---> DVI out

Hi,

Has anyone experimented using a serdes to feed directrly video from an Altera Cyclone or Cyclone II device to a DVI monitor? Without an external power hungry serializer chip? I know that the I/O supports a myriad of differential signalling schemes, but not directly DVI signalling. Is there a way to achieve this - lets say not fulfilling the DVI-spec to 100%, but acieving an image on a DVI monitor on lets say max an 1,5m cable?

Christian

2 Replies

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

    What voltage levels does DVI require? If you have a spec that is freely available and not confidential please attach.

  • Altera_Forum's avatar
    Altera_Forum
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    18 years ago

    Hi,

    The DVI signals are differential current fed signals. The DVI spec can be found at:

    http://www.ddwg.org/lib/dvi_10.pdf

    Starting at page 33 you'll find the electrical specification, too long to describe here. The standard states a current fed differential signalling, but using just a short cable and proper resistive loads/impedance matching it might be possible to achieve this even with a voltage output at Cyclone I/II ?? Or are there any other vendors that have FPGA's that can do DVI directly??

    Regards,

    Christian