32-bit MCU takes very little power

The 32-bit EFM32G Gecko microcontroller is based on the ARM Cortex-M3 and is said to consume a quarter of the energy required by many existing 8-, 16-, or 32-bit MCUs. The processor takes less than 180 µA/MHz while executing code from flash. It has up to 128 Kbytes of flash and up to 16 Kbytes of RAM.

Standby power is even better, taking 900 nA while running RTC, power-on reset, brownout detector, and full RAM and CPU retention and it needs less than 20 nA in its deepest sleep mode. The IC includes a 4 x 40-segment LCD controller, an 8-channel 12-bit 1-Msample/s A/D converter, a 32-kHz real-time counter that takes just 50 nA, and a UART capable of 9,600 bits/s while taking just 100 nA. The device operates from a single supply of 1.8 to 3.8 V at –40° to 85°C. (From $1.55 ea/100,000 — prod qty, 4th qtr.)

Energy Micro , Oslo , Nydalen , Norway
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http://www.energymicro.com