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  • TI Thinks Resolved

XIO2213B: XIO2213 can't establish PCIe link

Part Number: XIO2213B

Hello.

I have a board that contains a processor and the TI XIO2213B LLC chip.

My processor can't seem to successfully establish a link with the XIO2213 LLC chip. There are three other devices connected to the processor besides this XIO part, and all three of them are able to establish link with the processor, so I don't believe that the processor is at fault, or that there is a board issue regarding signal integrity Ithe XIO part is only Gen1 PCIe, and the other devices are Gen2, and use the same routing rules).

One significant difference between our board and the XIO2213 dev board is that our custom board does not contain an EEPROM connected to the XIO part. The data manual is somewhat vague in explaining whether or not this EEPROM is required for successful PCIe operation.

Does anybody know if a lack of an EEPROM could be an issue?

  • Hello Trevor,

    The EEPROM is only required if you want to modify the default register configuration, so it is not needed by default.

    CAn you share us your schematic so we can take a look at it?

    Regards,
    Roberto.
  • In reply to Roberto Diaz:

    figured out the problem.

    we did not have ac coupling caps on our clock inputs to the device. added those and now processor can establish a PCIe link.

  • In reply to Trevor Fox:

    Hello Trever,

    It's good to know you find the problem, thanks for share your comments.

    Regards,
    Roberto

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