If you’re after ultra-low power consumption (we’re talking nano Amps), but processing power when you need it (up to 25MHz) the MSP430 is a great go to.
The MSP430 is a mixed-signal microcontroller family from Texas Instruments, first introduced on 14 February 1992. Built around a 16-bit CPU, the MSP430 is designed for low cost and, specifically, low power consumption embedded applications.
