Requirement of Serdes Reference Clock in P5040 Processor

[prasantahalder]

Hi,

We need to use two x1 PCIe and four SGMII of P5040. For that we are planning to use SRDS_PRTCL=04h and we connected two serdes lanes(SD4-SD5) for PCIeand four serdes lanes(SD6-SD9) as SGMII. We are not using Serdes Bank-2, Bank-3 and Bank-4.

For this configuration we are feeding 100MHz clock only in SD_REF_CLK1_N/P while other reference clocks are grounded. Is this scheme is OK or should we provide clock in other reference clock inputs?

Regards,

Prasanta

[ufedor · Accepted solution]

> For this configuration we are feeding 100MHz clock only in SD_REF_CLK1_N/P

> while other reference clocks are grounded.

This configuration is viable.