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Cyclone 10GX: Do I need 100 MHz CLK_USR input with PCI Express?

NWein
Novice
475 Views

On a Cyclone 10GX, if a single lane of PCIe is the only transceiver I'm using, do I need a 100 MHz CLK_USR input?  I imagine I probably do, but it's not 100% clear from the docs I have read.

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SengKok_L_Intel
Moderator
404 Views

Hi,


This is required to connect a free running clock for the CLKUSR. else the transceiver calibration cannot be started, and it will impact the PCIe.


Intel® Cyclone® 10 GX Device Family Pin Connection Guidelines


Regards -SK


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3 Replies
SengKok_L_Intel
Moderator
405 Views

Hi,


This is required to connect a free running clock for the CLKUSR. else the transceiver calibration cannot be started, and it will impact the PCIe.


Intel® Cyclone® 10 GX Device Family Pin Connection Guidelines


Regards -SK


NWein
Novice
386 Views

Thanks, just wanted to be sure.

SengKok_L_Intel
Moderator
264 Views

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