Silicon Labs’ MG22E (EFR32MG22E) wireless SoC provides engineers with a high-performance, ultra-low power 76.8-MHz Arm Cortex-M33 microcontroller with DSP, FPU, and TrustZone security, and a 2.4-GHz transmitter supporting Bluetooth Low Energy 5.2 and mesh connectivity, Zigbee PRO/Green Power, and proprietary protocol such as Wirepas Connectivity Suite for hyperscale mesh networking.
This wireless functionality also includes angle-of-arrival and angle-of-departure sensing for direction finding, and the MG22E features cryptographic hardware acceleration and a true random number generator for additional security.
The MG22E is specifically designed for ambient IoT, eliminating the requirement for primary batteries in applications such as asset tracking, smart home sensors, lighting controls, industrial predictive maintenance, building automation, and electronic shelf labels.
This is most evident by the ultra-low transmit and receive power (8.2 mA at +6 dBm and 3.9 mA at 250 kbps O-QPSK DSSS respectively), and 1.4 µA DeepSleep current with 32 kB RAM retention and RTC running. When the device is active, the current draw is as low as 26 μA/MHz at 38.4 MHz. In its most inert state (EM4) the current draw is 170 nA.
The MG22E offers many standard MCU peripherals as shown in the architecture diagram above. These include:
- Up to 512 kB flash program memory
- Up to 32 kB RAM data memory
- Up to 26 GPIOs
- 2 × UART/SPI interfaces
- 2 × I2C interface
- 1 × EUART interface
- 16-bit ADC
- PDM interface for digital microphone
Silicon Labs’ MG22E can be supplied by 1.71-3.8 V power input and is suitable for operation in -40°C to 125°C. Several package options are available with AEC-Q100 certified options as small as 4 x 4 x 0.85 mm and standard options as small as 4 x 4 x 0.30 mm.
To test the functionality of the MG22E SoC with devices such as Dracula Technologies + e-peas’ LAYER energy harvesting evaluation kit, Silicon Labs’ Explorer Kit provides all the connections you’ll require to interface the MG22E with your choice of peripherals in mikroBUS and Qwiic form factors.
An onboard micro-USB port enables connection to your PC for flashing and debugging, in addition to a mini SLSDA001A-compatible Mini Simplicity debug connector. 1x user button is provided, with EM2 wake-up functionality, in addition to 1x user LED.
If you have a commercial project and are interested in testing the ultra-low-power performance of Silicon Labs’ MG22E, fill out the form below, and ipXchange will get you connected for evaluation.