TMS320F28069: What is the formula to calculate System clock frequency from external Oscillator input. Formula is mentioned in the supporting document. also confusion between 4-bit multiplier PLLCR[DIV]

Sachin,

SYSCLKOUT = (OSCCLK * PLLCR[DIV] / PLLSTS[DIVSEL]) 

Where SYSCLKOUT = operating frequency of the device, OSCCCLK = frequency of the i/p clock to the device, PLLCR[DIV] = PLL multiplier value & PLLSTS[DIVSEL] = clock divider at the o/p of the PLL. 

On a different note, it appears you attempted to type the complete description of your problem in the "subject" field itself. So, there is no description of the problem in the body of the post. Please let me know if my answer did not address your concern.

Thanks Harish.