Thread a few weeks ago on the MSP430: https://news.ycombinator.com/item?id=12952100 https://news.ycombinator.com/item?id=12952100 tl;dr (I hunted up the datas

Thread a few weeks ago on the MSP430: https://news.ycombinator.com/item?id=12952100 https://news.ycombinator.com/item?id=12952100 tl;dr (I hunted up the datasheets); they'll run (i.e. processing numbers, not idling) at 120 µA/MHz, which is miniscule. However, there are some new ARM-Thumb designs which will run at 35 µA/MHz: http://www.atmel.com/products/microcontrollers/arm/sam-l.aspx http://www.atmel.com/products/microcontrollers/arm/sam-l.asp...