 EFM32

EFM32 Gecko MCUs are a family of energy-friendly, mixed-signal 32-bit microcontroller integrated circuits from Energy Micro (now Silicon Labs) based on ARM Cortex-M CPUs, including the Cortex-M0+, Cortex-M3 and Cortex-M4.EFM32 microcontrollers have a majority of their functionality available down to their deep sleep modes, at sub-microamp current consumption, enabling energy efficient, autonomous behavior while the CPU is sleeping.