Power consumption calculation for MSP430F5227 in Ideal and active mode

The only power consumption you can 'calculate' is the power consumption when VCC is off. It is 0W. Everything else depends on what you let the MSP do, what hardware you use and how. For the plain CPU core, there are some values in the datasheet. consumed power increases linearly with supply voltage (as current stays constant) and also increases more or less linearly (there is a fixed offset) with frequency (as the current depends on signal transisitons, which increase with clock speed).

For some of the other modules, current consumption is stated in the datasheet (e.g. for using the internal voltage reference or the ADCs), on some others this depends on external factors (e.g. for all modules that input or output digital signals and need to drive external peripherals. Including UART/SPI/I2C).

Also, I'm a bit puzzled about 'DVIO works on 1.8V'. While there are some MSPs which have 5V tolerant inputs, DVIO (especially the output) works on DVCC and not below. 1.8V input voltage will even be not enough to be accepted as high if DVCC is 3V. Unless the 52xx (for which I doN't have a datasheet in my collection right now, as the device page is not found on TIs website) is different from other MSPs, there is no separate DVIO to DVCC.