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9 years ago

Cyclone V GT Dev Kit - External xcvr refclk for HSMC

Hi,

I’m using the Cyclone V GT development board. I would like to provide each transceiver bank with other clock sources; one HSMC transceiver externally through the HSMC and the other two from the onboard oscillators. Looking at the reference manual and the Cyclone V device handbook on transceivers, only the PCIe and HSMC port B transceivers can be driven by an external clock through a SMA pair. Otherwise they all work off of the onboard clock oscillators. Is there any way to connect to the HSMC transceiver clocks from an external source or external–to–FPGA source? ie. REFCLK_QL2_P/N to HSMA_CLK_IN_P/N.