3.5 Clocking Structure

The following figure shows the clocking structure of the design. PF_CCC_C0 generates the 50 MHz fabric clocks from the REF_CLK generated by PF_XCVR_REF_CLK. The on-board 156.25 MHz clock is the reference clock for the XCVR, which further provides the operating clock of 153.6 MHz for the TX_Path and RX_Path blocks.