MSP430F6779: System Frequency vs Supply Voltage

Hi,

In datasheet it is written that MSP430F6779 can work at maximum 8Mhz if Supply Voltage is 1.8V.

Above limitation is for MCLK according to the device datasheet. 

My question is that if DCO output has similar limitation. 

For example

VDD = 1.8V

fDCO = 64 Mhz (suppose it is adjusted to generate this frequency using FLL)

And finally use DIVM to divide fDCO frequency to get final MCLK

Set DIVM = 8

So final fMCLK = fDCO/8 = 8Mhz.

Well, final MCLK is in the range. What do you think that is safe enough? Or there is another limitation for DCO output for 1.8V VDD?

Thanks.