Power consumption

Nobody has yet written a formula for this.

There are different typical values for the processor corx, based on certain VCC levels. But for the total power consumption, there are so many variables and nonlinarities that it is next to impossible to do it.

VCC, Fosc, MCLK (which does not need to equal Fosc), the number of active modules and their input clock or operating frequency (which can be totally different to the main clock), the duty cycle of the peripherals, even the code being executed, the numer of internal or external interrupts and whatever, has an impact on the power consumption. Not to count the driving currents for the ports. So besides the frequency, there are some 40 or 50 or even more variables in the eqution. with more or less impact on the total consumption. After all, the MSP isn't just a processor like an old 8086.

All you can do is to measure and publish some typical values at certain points, including a sleeping processor with no hardware modules active and stopped clocks. This is the minimal consumption for ram retention and core voltage supervisor. On some MSPs, you can even disable the ram retention and shut off everything except the wakeup signal on a high-impedance port pin.

All you can do for your project is trying. And if you think your power consumtion is too much, then you should look at your code and hardware and maybe you'll find something to optimize. The datasheet can give you only a hint whether there might still be room for improvements or whether you are already in the lowest range. It cannot, under no circumstances, give you an exhausting answer for your particular project and combination of parameters.