Silicon Labs EFR32MG24 Series 2 Multiprotocol Wireless SoCs

Silicon Labs EFR32MG24 Series 2 Multiprotocol Wireless SoCs are ideal for mesh IoT wireless connectivity using Matter, OpenThread, and Zigbee protocols for smart home, lighting, and building automation products. With key features like high-performance 2.4GHz RF, low current consumption, an AI/ML hardware accelerator, and Secure Vault, IoT device makers can create smart, robust, and energy-efficient products that are secure from remote and local cyber-attacks. An ARM Cortex®-M33 running up to 78MHz, up to 1.5MB of Flash, and up to 256kB of RAM provides resources for demanding applications while leaving room for future growth. Target applications include gateways and hubs, sensors, switches, door locks, LED bulbs, luminaires, location services, predictive maintenance, glass break detection, wake-word detection, and more.

Features

32-bit ARM® Cortex®-M33 core with 78.0MHz maximum operating frequency
Up to 1536kB of flash and 256kB of RAM
High-performance radio with up to +19.5dBm output power

Energy-efficient design with low active and sleep currents
Secure Vault™
AI/ML hardware accelerator

Applications

Smart Home
- Gateways and hubs
- Sensors
- Switches
- Door locks
- Smart plugs
Lighting
- LED bulbs
- Luminaires

Building Automation
- Gateways
- Sensors
- Switches
- Location services
AI/ML
- Predictive maintenance
- Glass break detection
- Wake-word detection

Specifications

Low power wireless system-on-chip
- High-performance 32-bit 78.0MHz ARM Cortex®-M33 with DSP instruction and floating-point unit for efficient signal processing
- Up to 1536kB flash program memory
- Up to 256kB RAM data memory
- 2.4GHz radio operation
Radio performance
- -104.5dBm sensitivity at 250kbps O-QPSK DSSS
- -104.9dBm sensitivity at 125kbps GFSK
- -97.5dBm sensitivity at 1Mbit/s GFSK
- -94.4dBm sensitivity at 2Mbit/s GFSK
- TX power up to 19.5dBm
Low system energy consumption
- 4.4mA RX current (1Mbps GFSK)
- 5.1mA RX current (250kbps O-QPSK DSSS)
- 5.1mA TX current at 0dBm output power
- 20mA TX current at 10dBm output power
- 155mA TX current at 19.5dBm output power
- 32.2μA/MHz in Active Mode (EM0) at 39.0MHz
- 1.3μA EM2 DeepSleep current (16kB RAM retention and RTC running from LFRCO)
Supported modulation format
- 2x (G)FSK with fully configurable shaping
- OQPSK DSSS
- (G)MSK
Protocol support
- Matter
- OpenThread
- Zigbee
- BLUETOOTH® Low Energy (BLE)
- BLUETOOTH® mesh
- Proprietary 2.4GHz
- Multiprotocol
Secure vault
- Hardware cryptographic acceleration for AES128/192/256, ChaCha20-Poly1305, SHA-1, SHA-2/256/384/512, ECDSA +ECDH(P-192, P-256, P-384, P-521), Ed25519 and Curve25519, J-PAKE, PBKDF2
- True Random Number Generator (TRNG)
- ARM® TrustZone®
- Secure boot (Root of Trust Secure Loader)
- Secure debug unlock
- DPA countermeasures
- Secure key management with PUF
- Anti-tamper
- Secure attestation

Wide selection of MCU peripherals
- Analog-to-Digital Converter (IADC)
  - 12-bit at 1Msps or 16-bit at 76.9ksps
  - Select OPNs support High-Speed Mode (up to 2Msps) and High-Accuracy Mode (up to 16 bits ENOB at 3.8ksps)
- 2× Analog Comparator (ACMP)
- 2× Digital to Analog Converter (VDAC)
- Up to 32 General Purpose I/O pins with output state retention and asynchronous interrupts
- 8-Channel DMA Controller (LDMA)
- 16-Channel Peripheral Reflex System (PRS)
- 3× 16-bit timer/counter with 3 Compare/Capture/PWM channels (TIMER2/3/4)
- 2× 32-bit timer/counter with 3 Compare/Capture/PWM channels (TIMER0/1)
- 32-bit Real Time Counter (SYSRTC)
- 24-bit Low Energy Timer for waveform generation (LETIMER)
- 16-bit Pulse Counter with asynchronous operation (PCNT)
- 2× Watchdog Timer (WDOG)
- 1× Universal Synchronous/Asynchronous Receiver/Transmitter (USART), supporting UART/SPI/SmartCard (ISO 7816)/IrDA/I2S
- 2× Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART) supporting UART/SPI/DALI/ IrDA
- 2× I²C interface with SMBus support
- Low-Frequency RC Oscillator with precision mode to replace 32kHz sleep crystal (LFRCO)
- Keypad scanner supporting up to 6 x 8 matrix (KEYSCAN)
- Die temperature sensor with ±TBD°C accuracy after single-point calibration
Wide operating range
- 1.71V to 3.8V single power supply
- -40°C to +125°C temperature range
Packages
QFN40, 5mm × 5mm × 0.85mm
QFN48, 6mm × 6mm × 0.85mm