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dinkersemwal's avatar
dinkersemwal
Icon for New Contributor rankNew Contributor
5 years ago
Solved

NCO IP output is shifting wrt output valid on aria10 eval board

Hi All, I am using intel NCO IP as DDS to generate a LO for the mixer. when i am testing my module on board(aria10 eval), i observe that output sample is shifting by one clock (back and forth wit...
  • SengKok_L_Intel's avatar
    SengKok_L_Intel
    4 years ago

    Hi,

    This might be related to the reset, you probably need to hold the reset for a few clock cycles while the clken is asserted.


    Regards -SK


SengKok_L_Intel's avatar
SengKok_L_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi,


Did you reset the NCO IP after power up? Does the behavior change after each reset?


In order to better understand the problem, it will be helpful if you can attach the waveform of your simulation and hardware result.


Regards -SK


dinkersemwal's avatar
dinkersemwal
Icon for New Contributor rankNew Contributor
4 years ago

Hi SK,

thanks for the response.

This behavior is not very consistent it is coming once in very 8 to 10 reboots.

and output is not just one sample shifted but samples are totally different some times.

Did you reset the NCO IP after power up? Does the behavior change after each reset?

>>Yes NCO gets reset after Power up, but behavior doesn't change at every reset. it changes after reboot.

i am attaching the simulation and the signal tap wave form.

simulation captures expected samples .

and signal tap capture change in the behavior

Thanks

Dinker