TMS570LC4357: Where can I find the "Oscillator and PLL" user guide referenced in the ref manual SPNU563A for TMS570LC4357?

Section 2.4.1.1 in the TMS570LC4357 reference manual refers to an "Oscillator and PLL guide". Where can I find it?

I quote:

The clock source is only disabled once there is no active clock domain that is using that clock source. Also
check the “Oscillator and PLL” user guide for more information on enabling / disabling the oscillator and
PLL.

Thank you

Subu