SiLEFR32MG21A020F768IM32
Overview
The EFR32MG21A020F768IM32 is a high-performance wireless SoC from the Silicon Labs Mighty Gecko Series 2 family, featuring an ARM Cortex-M33 core with TrustZone and a 2.4 GHz radio. It is specifically designed for multi-protocol IoT mesh networking, supporting Zigbee, Thread, and Bluetooth Low Energy in a compact 4x4 mm QFN32 package.
Why Choose This Part
This SoC features a dedicated Secure Engine that provides Secure Boot, Secure Debug, and a True Random Number Generator for robust IoT protection. The Cortex-M33 core delivers 80 MHz performance with integrated FPU and DSP, while maintaining an efficient power profile of 50.9 uA/MHz.
Applications
Getting Started
Development typically utilizes the Simplicity Studio IDE and the Gecko SDK (GSDK), which provides pre-certified stacks for Zigbee and Thread. For hardware evaluation, the Wireless Gecko Starter Kit (SLWSTK6006A) with an EFR32MG21 Radio Board is the standard prototyping platform.
EFR32MG21 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Memory | Interfaces | Frequency | Modulation | RF Family/Standard | Rx Current | Stock |
|---|---|---|---|---|---|---|---|
| EFR32MG21A020F768IM32 (this part) | — | — | — | — | — | — | 1,855 |
| EFR32MG21A020F1024IM32-B | 1024k | ADC, GPIO, I2C, I2.. | 2.4GHz | GFSK, O-QPSK | Bluetooth | 8.8mA | 1,954 |
| EFR32MG21B020F1024IM32-B | 1MB | I2C, I2S, SPI, IrD.. | 2.4GHz | DSSS, GFSK, O-QPSK | 802.15.4, Bluetooth | 8.8mA | 2,302 |
| EFR32MG21A020F768IM32-B | 768k | ADC, GPIO, I2C, I2.. | 2.4GHz | GFSK, O-QPSK | Bluetooth | 8.8mA | 405 |
