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What is the common mode voltage for the PCIe receive inputs?

Question asked by Chris Bobek on Aug 7, 2019
Latest reply on Aug 7, 2019 by igorpadykov

Hi,

 

We have measured eye diagrams for our i.MX8 design and they meet specification.  We also measured common mode voltage for the PCIe receiver inputs (PCIE1_RXN and PCIE2_RXN) and they are 0V on the BGA pads.  I normally expect to see a DC bias voltage above 0V on this type of interface.

 

What is the common mode voltage or DC bias voltage for PCIE1_RXN and PCIE2_RXN?

 

Thank you,

 

Chris

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