P2020 pcie can‘t link

[振刘]

    We use P2020 to control switch by PCIE(1X).But the PCIE(1X) can't conect the switch.We check the register that is  LTSSM State Status Register,whitch result is 08 or 06. What can I  do now?

[ufedor]

Points to check:

1) quality of the SD_REF_CLK; whether spread-spectrum is used, reference clocks from the same origin have to be provided for the P2020 and the remote device

2) remote link partner’s transmitter and link routing

3) eye diagram captured at the corresponding lane RX pins of the P2020