Intel: Use Transceiver Block with Cyclone® V. For Refclk, which has better performance: generating and inputting the desired frequency using a PLL externally, or inputting the desired frequency directly from the pin as Refclk?

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Intel: Use Transceiver Block with Cyclone® V. For Refclk, which one has better performance, the case where the desired frequency is generated using an external PLL and input, or the case where the desired frequency is input directly from the pin and used as Refclk?

Cyclone clock/PLL transceiver

Category: Walkie-talkie
tool:-
Device: Cyclone® V

For the PLL used in the Transceiver, the best performance is to input the Refclk directly from the pin.
Please check the description in the handbook below.

Cyclone V Device Handbook Volume 2: Transceivers
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-v/cv_5v3.pdf
(see Input Reference Clocking section)

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