RTOS/CC2650: [TI-RTOS] strictly limited PWM signal generating method by RTOS.

Tool/software: TI-RTOS

Hi, I'm Gyu Yang who using the CC2650 with CCS v8.

Also i am using the TI- RTOS and studying with example codes. and there is some things that i wonder.

1. in every example code cfg file, there are code like below.

   /* ================ Clock configuration ================ */

   var Clock = xdc.useModule('ti.sysbios.knl.Clock');

   Clock.tickPeriod = 10;

  I understood that this make the BIOS kernel clock period set to 10us. then what is the min and max range that i can control?

  And this param(10us), does the scheduler check to see if there is task ready to run and execute at 10us intervals?

2. I have to making clock signal that waveform is strictly limited. so i think that this one can be implemented by PWM.

   but i'm wonder that PWM signal might be effected by other task or something else. so would you recommend the way that can generate the strictly limited PWM signal like clock source.   

So sorry for making fundamental question, but your tips or explains will be really really helpful to me! Thanks in advance!!!!!!!!!