How can I use PLL output as Ethernet Internal PHY Clock Source?

Hi Champs,

According to TM4C1294NCPDT Datasheet(SPMS433B) Figure 5-5 on page 233, it looks like Ethernet Internal PHY Clock has 3 sources.  There are GPIO(PM4), MOSC and PLL Output.

So, could you please let me know how I can use the PLL Output as the PHY Clock?

Best regards,
j-breeze