1.5.4.4.3 Single-Ended CMOS Input

In addition, the XCVR_REFCLK_P/N pins can connect a single-ended CMOS clock signal to the REFCLK0 and REFCLK1 inputs. This allows two independent reference clocks to be applied to a XCVR REFCLK inputs. XCVR_VREF is not used for single-ended CMOS reference clock input signaling.