In one of my project, I want to use a small microcontroller. Because of it's low cost, low power use and simplicity, I decided to use a STM32l011. With it's TSSOP footprint, I can solder it manually.
The MCU will be sleeping most of the time, and waken up by another MCU via I2C. So I have to put it in STOP mode with wake up from I2C.