I am developing a battery powered application where i will need a RTC, one UART, one I2C and one SPI, and couple ADC. Looking at MSP430 devices both that seems to suit to my applications are the MSP430F55xx/53xx series and FRAM devices. As my dutycycle will be something from 1/000 and down (probably 1/10000 sometimes) i belive the FRAM device is not the most suitable due to its high LPM3 current consumption compared to the flash family. Is that correct or i missed something here?
Finally, my application won't need much processing power, basically just a datalogger reading a few sensors and writing on an external flash. I belive a few AVR devices could handle that and have the same peripherals. Is there any power consumption comparison betwen AVRmega devices and the MSP430F55xx family?
Thank you!