The Swiss research organization CSEM (Center Suisse d’Electronique et de Microtechnique SA) has developed a microcontroller with a 32 bit RISC processor, which can be operated near the threshold voltage with a voltage of 0.5 V, with the wafer manufacturer Mie Fujitsu Semiconductor (MIFS) developed.
To read more, please visit: https://www.elektroniknet.de/elektronik/halbleiter/32-bit-risc-prozessor-mit-2-5-mw-mhz-166691.html. Please note that the original article is in German.