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HBhat2's avatar
HBhat2
Icon for Contributor rankContributor
6 years ago
Solved

Skew Calculations in native PHY for L-tile (Stratix 10)

Hi, I was estimating the clock skew between 2 channels of a transceivers bank. 3.9.4. Skew Calculations (as in L-tile transceiver user guide) Here, Maximum difference in number of parallel clo...
  • CheepinC_altera's avatar
    CheepinC_altera
    6 years ago

    Hi HPB,

    Sorry for the delay. I thought I have responded to your initial post but probably I have missed out to save into the system. Sorry for the inconvenience.

    Regarding the inquiry on the skew calculation, based on my understanding, the channel FIFO should be referring to the phase comp FIFO of the PCS. The reset that is affecting the FIFO is the tx_digitalreset. If your tx_digitalreset for all the bonded channels are de-asserted at the same time, the N can be 0.

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

    Best regards,

    Chee Pin

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

Hi HPB,

Sorry for the delay. I thought I have responded to your initial post but probably I have missed out to save into the system. Sorry for the inconvenience.

Regarding the inquiry on the skew calculation, based on my understanding, the channel FIFO should be referring to the phase comp FIFO of the PCS. The reset that is affecting the FIFO is the tx_digitalreset. If your tx_digitalreset for all the bonded channels are de-asserted at the same time, the N can be 0.

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

Best regards,

Chee Pin