To whom may be concerned.
Could you give me an advice for RX Equalizer on TLK10031?
My customer had packet loss on HS Side and found possilbe solution to solve problem by using equalizer setting, specailly for HS_EQHLD, HS_EQPRE[2:0].
But, Customer has one question for them due to below phenomenon.
1) when deteced link up, Customer changes the value of HS_EQHLD, HS_EQPRE[2:0] to 0'b1 and other value rather than default value respectivly.
and checked there was no packet loss.
2) after then made link down and up, keeping register values on 1) step.--> Even thought using same values, Packet loss happened.
3) So, Customer made another procedure for testing.
a. When detected link up, applied Values which were used at 1)
b. When detected link up, applied default values on HS_EQHLD, HS_EQPRE
C. When detected link up again, applied values which were used at 1) again.
after using this procedures, packet loss didn't happen.
Question)
Could you let me know why packet loss happend at 2) and why packet loss didn't happend even though using the same vlaue on HS_EQHLD, HS_EQPRE.
Should we return HS_EQHLD's value to default(0'b0) whenever link become down?
thank you
Best Regards
Mark Kim