EFR32FG13 Flex Gecko Proprietary Protocol SoC, 32-bit ARM® Cortex®-M4 core, 40 MHz maximum operating frequency

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The Flex Gecko proprietary protocol family of SoCs is part of the Wireless Gecko portfolio. Flex Gecko SoCs are ideal for enabling energy-friendly proprietary protocol networking for IoT devices.

The single-die solution provides industry-leading energy efficiency, ultra-fast wakeup times, a scalable power amplifier, an integrated balun and no-compromise MCU features.

Flex Gecko applications include:
• Home and Building Automation and Security
• Metering
• Electronic Shelf Labels
• Industrial Automation
• Commercial and Retail Lighting and Sensing

Symmetry Electronics is an authorized Silicon Labs distributor.


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32-bit ARM Cortex-M4 core with 40 MHz maximum operating frequency
Up to 512 kB of flash and 64 kB of RAM
Pin-compatible with EFR32BG1 devices (exceptions apply for 5V-tolerant pins)
12-channel Peripheral Reflex System enabling autonomous interaction of MCU peripherals
Autonomous Hardware Crypto Accelerator and True Random Number Generator
Integrated PA with up to 19 dBm (2.4 GHz) or 20 dBm (Sub-GHz) tx power
Integrated balun for 2.4 GHz
Robust peripheral set and up to 31 GPIO