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ESama's avatar
ESama
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5 months ago

REFCLK PB on a 10CX105YF672E6G

Hello I have two identical boards integrated with two similar Cyclone 10 GX but having two different speed grades: one with a 10CX105YF672E5G, the other with a 10CX105YF672E5G. On the ...E5G every t...
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WZ2's avatar
WZ2
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5 months ago

Hi there,

May I ask if you could try using this pin as the input to the IOPLL? If it is used as the PLL input, is the lock signal able to assert successfully? So far, I haven't seen this issue on this specific device.

Additionally, could you please confirm the I/O standard of the input clock signal? Is it AC-coupled?

Best regards,

WZ


  • ESama's avatar
    ESama
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    4 months ago

    Hello

    Thank you for your reply.

    This pin is used as the input to a IOPLL and the lock signal doesn't assert with the E6G version (and assert with the E5G...)

    Configuration of the pin :

    - I/O Standard: LVDS

    - Input Termination : differential

    - AC coupled on the board

    Best regards

    Etienne