1.7 Clocking Structure

In this demo design, there are two clock-domains. The on-board 125 MHz crystal oscillator drives the XCVR reference clock. The XCVR REFCLK source the transceivers and global clock network. The on-chip 160 MHz RC oscillator drives the CoreABC and PF_DRI block. The following figure shows the clocking structure of the design.

Figure 1-13. Clocking Structure