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CDCE72010EVM clock generator kit

CDCE72010EVM clock generator kit

This question is answered
Niccolo` Battezzati
Posted by Niccolo` Battezzati
on Jun 11 2009 10:07 AM
Prodigy10 points

Hi all,

I just bought a CDCE72010EVM evaluation module for the CDCE72010 device.

I need to generate an LVCMOS output between 0 V and 3.3 V (or at least 0-1.5 V) to clock a design implemented in an Actel ProASIC3 FPGA, on a commercial board (ProAsic3 Evaluation Board).

How shall I do?

 

I can only generate LVCMOS outputs between -800 mV and +960 mV (with a divider of 80).

I use USB to power up the evaluation module and, if I try external 3.3V power, I cannot generate any clock.

So, I enable 'EVM power' in the control GUI, select USB power on the board and select, by the control GUI, LVCMOS level on output 2 with a divider of 4'. The other parameters are default. I get a clock of about 120 MHz between -440 mV and 520 mV.

 

If you need more information about my test I'm ready to provide anything, only I need to know what ;-)

 

Thank you in advance!

Niccolo`

evaluation clock CDCE72010 LVCMOS
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  • nancy!
    Posted by nancy!
    on Jun 18 2009 10:51 AM
    Intellectual2765 points

    Hi Niccolo,

    Sorry for the delayed response! It looks like the board is set for LVPECL mode and you are measuring the signal after the AC capacitor on the output. You need to probe on the signal before the output capacitor to see the right DC level and change the output type to LVCMOS. Please click on my profile and send me a private message (start a conversation) then please send me your email so we can help you further.

    Regards,

    Nancy

    It is not the strongest of the species that survives, nor the most intelligent that survives.  It is the one that is the most adaptable to change. - Charles Darwin

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  • RoMo
    Posted by RoMo
    on Jun 19 2009 11:21 AM
    Prodigy110 points

    Niccolo

    I will be supporting you to resolve this issue.  Please send me your phone number we can resolve it over the phone.

    My email is rmoubarak@ti.com

    Thanks

    Roland

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  • RoMo
    Posted by RoMo
    on Dec 21 2009 16:06 PM
    Verified Answer
    Verified by mapefer3
    Prodigy110 points

    Niccolo/Nancy

    I just got an email with this question and we did close this issue 6 month ago. Please let me know if you need more

    help in regards to the CDCE72010 EVM.

    Roland

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