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manu-solystic
New Contributor
New ContributorCyclone 10GX PCI express without clk_user any solution ?
I have a prototype design with a Cyclone 10GX
I want to use the PCI express , but the clk_user is not connected And if i read the documentation about the PCI express with cyclone 10Gx , this clock...
Hi,
So I understand that the only solution is to connect a clock on the clkuser pin
So you can close this ticket
regards
Wincent_Altera
Regular Contributor
Regular ContributorHi,
We wouldn't advise turning off the CLKUSR clock. In my view the FPGA device won't be expecting this to happen.
The CYclone 10 PCG states on page 19 :
- This pin is used as the clock for transceiver calibration, and is a mandatory requirement when using transceivers.
- This pin is optionally used for EMIF HMC calibration, as well as a configuration clock input for synchronizing the initialization of more than one device.
- This is a user-supplied clock and the input frequency range must be in the range from 100 MHz to 125 MHz.
- https://www.altera.com/content/dam/altera-www/global/en_US/pdfs/literature/dp/cyclone-10/pcg-01022.pdf
Hope this clarified,
Regards,
Wincent_Intel
