EFM32
32-bit Energy Friendly Microcontrollers, from Energy Micro AS
EFM32 Gecko MCUs are a family of 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.
Overview
EFM32 microcontrollers have a majority of their functionality available down to their deep sleep modes, at sub-microamp current consumption, enabling energy-efficient, and autonomous behavior while the CPU is sleeping.
An example of a deep sleep peripheral on EFM32 is the Low Energy Sensor Interface (LESENSE), which is capable of duty-cycling inductive, capacitive, and resistive sensors while autonomously operating in Deep Sleep mode. Another aspect of the Gecko MCUs is that the peripherals have a direct connection with each other, allowing them to communicate without CPU wake-up and intervention. This interconnect is known as the Peripheral Reflex System (PRS).
Functionality is available at the lower Stop and Shutoff energy modes. The Stop mode includes analog comparators, watchdog timers, pulse counters, I2C links, and external interrupts. In Shutoff mode, with 20–100 nA current consumption, depending on the product, applications have access to GPIO, reset, a real-time counter (RTC), and retention memory.
The EFM32 family consists of several sub-families, ranging from the EFM32 Zero Gecko, based on an ARM Cortex-M0+, to the higher performing EFM32 Giant Gecko and Wonder Gecko, based on Cortex-M3 and Cortex-M4 respectively. EFM32 technology is also the foundation for EFR32 Wireless Geckos, a portfolio of Sub-GHz and 2.4 GHz wireless system on a chip (SoC) devices.
The public source identifies “EFM32” as 32-bit Energy Friendly Microcontrollers, from Energy Micro AS. This brief keeps that definition visible, then builds a research path around EFM32, 32-bit and Energy.
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This entry incorporates text from “EFM32” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.