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AHX's avatar
AHX
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1 year ago

Arria 10 GX - Problem with PCIe and 2 transceivers (1250Mbps SFP)

Hello community, I'm facing a strange problem with two different Arria10 cards. Both devices are PCIe cards with 2 SFP (small form-factor pluggable) interfaces. Both SFPs are working in a time sens...
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RongY_altera's avatar
RongY_altera
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1 year ago

Thanks for the files.

Please refer to XCVR guide 1. Arria® 10 Transceiver PHY Overview

Your PCIe rx/tx pins are using bank 1C and 1D therefore you should use either PIN_AB28 or PIN_AD28 as PCIe refclk. Current PIN_Y28 can work as PCIe refclk only when PIN_AB28 and PIN_AD28 are not used.

Regards,

Rong

Mare's avatar
Mare
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1 year ago

Hi. I have another question regarding the connection of reference clocks for the transceiver banks. I checked Arria® 10 Transceiver PHY Overview and Arria® 10 and Cyclone® 10 GX Avalon® Memory-Mapped (AvalonMM) Interface for PCI Express* User Guide and I can't find information on how to connect PCIe reference clock. Can you point me to the manual chapter or page number where can I find this info?

From your reply, I can make the following conclusion: Use REFCLK....CHB if first GXBL channels are used (as we have PCIe lanes 2 and 3 on bank 1D channels 0 and 1) or use REFCLK...CHT where the last two channels are used (as we have PCIe lanes 0 and 1 on bank 1C channels 4 and 5).

Kind regards, Marko