PCIe clk DC offset adjustment

Thomas Yang55737

Hi experts,

My customer measured PCIe CLK voltage is about 1.18v which is higher than 1.15v in PCIe spec requirement, so they would like to know whether we have any register to adjust this? If not, do you have any other solution on this?

over 10 years ago

0 Senthilkumar Srinivasan over 10 years ago

TI__Mastermind 43660 points

Hello Thomas,

There is no offset register available in our device to adjust the PCIe CLK voltage.

Do you mean the 1.15v is common mode voltage ?

Did you measure the differential swing of PCIe CLK ?

At which point you measured the clock voltage ?

Please refer below thread for more details about PCIe clocking.

https://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/120427/429552#429552

Regards,

Senthil

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PCIe clk DC offset adjustment