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TSS3's avatar
TSS3
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5 years ago

Why RX part of C5GT XCVRs (Transceivers) do not work.

Hi, We are working with a board designed in-house. It hosts a Cyclone 5 GT FPGA, of whose 6 XCVRs, we use 4: 3 RX @ 1485MbpS, and 1 RX&TX @4752MbpS. In some of these boards, the XCVRs work fi...
CheepinC_altera's avatar
CheepinC_altera
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5 years ago

As I understand it, it has been some time since I last heard from you. This thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you.



TSS3's avatar
TSS3
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5 years ago

Hi Chee,

Thanks for helping us so far, it seems indeed it's an FPGA issue,

but not necessarily as previously suspected (unsuccessful XCVR init.).

Rather - a problem in the source who sold us the FPGAs.

In most FPGAs purchased from that source, problems occurred,

whereas in all FPGAs purchased from another source - no problems occurred.

We are waiting for test results from additional boards, to have better statistics,

to be sure this is indeed the case.

This is why on my side, I whish to keep this SR still open.

Thank you and best regards.

  • CheepinC_altera's avatar
    CheepinC_altera
    Icon for Regular Contributor rankRegular Contributor
    5 years ago

    Hi,

    Thanks for the update and finding. It seems weird to have source dependency for the failure. Probably due to specific batch or variants. Please feel free to keep me posted on the finding. Thank you.

    Best regards,

    Chee Pin