The EFM32™ Zero Gecko is the latest addition to the Silicon Labs' EFM32™ Zero Gecko portfolio of ultra low power and energy friendly 32-bit microcontrollers (MCUs).
With a unique combination of the powerful ARM® Cortex®-M0+ core, innovative low energy techniques, short wake-up time from energy saving modes and a wide selection of peripherals, the Zero Gecko is ideal for battery operated applications and other systems requiring high performance and low-energy consumption.


  • 24 MHz ARM Cortex-M0+ core
  • Up to 32 kB flash and 4 kB RAM memory
  • Up to 37 GPIO
  • Single 1.983.8 V power supply
  • -40 to 85 C operation range
  • Flexible energy management system with 5 different energy modes:
  • 20 nA shutoff mode (0.4 A with RTC)
  • 0.5 A stop mode, including power-on-reset, brown-out detector, RAM and CPU retention
  • 0.9 A deep sleep mode, including RTC with 32.768 kHz oscillator, power-on-reset, brown-out detector, RAM and CPU retention
  • 48 A/MHz sleep mode
  • 114 A/MHz run mode with code executed from flash
  • Packages:
  • 24-pin QFN (5 mm x 5 mm)
  • 32-pin QFN (6 mm x 6 mm)
  • 48-pin QFP (7 mm x 7 mm)

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