Forum Discussion

diddi1057's avatar
diddi1057
Icon for New Contributor rankNew Contributor
5 years ago
Solved

Arria 10 transceiver ATX PLL unlocked, when reference clock not present during device configuration

Hi all, please refer to attachment pdf .... Thanks
  • diddi1057's avatar
    diddi1057
    4 years ago

    Hi,

    good news:

    1. I have successfully simulated design in Modelsim -> ATX PLL relocked after REFCLK is present ->o.k.

    2. I have successfully downloaded design to hardware -> ATX PLL relocked after REFCLK is present ->o.k.

    Thank's for your advice!

    Regards

    diddi1057

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

Hi,


Thanks for your update. Your steps tally with those described in the user guide. I checked with register map and do not spot any anomaly. Just to check with you when you are doing the same steps in hardware, do you see the pll_cal_busy go high after triggering recalibration?


Can you share with me a simple test design with one channel Native PHY + ATX PLL + reset controller which could replicate your observation in Modelsim? I would like to further look into it.


Please let me know if there is any concern. Thank you.



Best regards,

Chee Pin



diddi1057's avatar
diddi1057
Icon for New Contributor rankNew Contributor
5 years ago

Hi,

attached the simple simulation project with one channel Native PHY + ATX PLL + reset controller. Please refer to atx_pll_simu.pdf inside project for instruction.

I have to check again the same steps in hardware, if pll_cal_busy go high after triggering recalibration ...

Best regards

diddi1057