how to use pll in cc3200 and to change quartz frequency

I bought a cc3200 launchpad and I try to understand how it works.
I connected the SD card reader to launchpad using pins 1, 2 and 64 and I soldered pull-up resistors on CMD and DATA0 pins. My program works OK.
But now I need to know how to clock my CPU (and ADC using frequency divider) with VCXO. I saw in datasheet that this launchpad could clocked with 40 Mhz crystal resonator only. I want to use 16.384 Mhz crystal and set desired frequency CPU manually. How to make it correctly?