Silicon Labs EFR32BG24L BLUETOOTH® LE SoCs

Silicon Labs EFR32BG24L BLUETOOTH^® LE SoCs are ideal for wireless connectivity using Bluetooth Low Energy and mesh. With key features such as 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 both remote and local cyberattacks. A Cortex^®-M33 on the Silicon Labs EFR32BG24L can run up to 78MHz and up to 768kB of Flash and 96kB of RAM, providing resources for demanding applications while leaving room for future growth.

Features

32-bit Arm^® Cortex-M33 core with 78MHz maximum operating frequency
Up to 768kB of Flash and 96kB of RAM
High-performance radio with up to +10dBm output power

Energy efficient design with low active and sleep currents
Secure vault
AI/ML hardware accelerator
Channel sounding

Applications

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

Portable medical devices
- Blood glucose meters
- Pulse oximeters
AI/ML
- Predictive maintenance
- Anomaly detection

Specifications

Low-power wireless System-on-Chip (SoC)
- High-performance 32-bit 78MHz Arm Cortex-M33 with DSP instructions and floating-point unit for efficient signal processing
- Up to 768kB Flash program memory
- Up to 96kB of RAM data memory
- 2.4GHz radio operation
- Matrix vector processor for AI/ML acceleration
Radio performance
- -105.7dBm sensitivity at 125kbps GFSK
- -97.6dBm sensitivity at 1Mbps GFSK
- -94.8dBm sensitivity at 2Mbps GFSK
- TX power up to 10dBm
Low system energy consumption
- 4.4mA RX current (1Mbps GFSK)
- 5mA TX current at 0dBm output power
- 19.1mA TX current at 10dBm output power
- 33.4μA/MHz in active mode (EM0) at 39.0MHz
- 1.3μA EM2 DeepSleep current (16kB RAM retention and RTC running from LFRCO)
Supported modulation format
- Two (G)FSK with fully configurable shaping
- OQPSK DSSS
- (G)MSK
Protocol support
- Bluetooth low energy
- Bluetooth mesh
- Proprietary 2.4GHz
- Direction finding using Angle-of-Arrival (AoA) and Angle-of-Departure (AoD)
- Channel sounding
  - 40MHz crystal required
  - Maximum TX power for channel sounding is 10dBm for all part numbers
Secure vault
- Hardware cryptographic acceleration for AES128/192/256, ChaCha20-Poly1305, SHA-1, SHA-2/256/384/512, ECDSA +ECDH(P-192, P256, 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 attestation

Wide selection of MCU peripherals
- Analog-to-Digital Converter (IADC)
  - 12-bit at 1Msps
  - 16-bit at 76.9ksps
- Two analog comparators (ACMP)
- Two Digital-to-Analog Converters (VDAC)
- Up to 26 general-purpose I/O (GPIO) pins with output state retention and asynchronous interrupts
- Eight-channel DMA Controller (LDMA)
- 16 asynchronous channels, four synchronous channels, Peripheral Reflex System (PRS)
- Three 16-bit timers/counters with three compare/capture/PWM channels (TIMER2/3/4)
- Two 32-bit timers/counters with three compare/capture/PWM channels (TIMER0/1)
- Two 32-bit real-time counters (SYSRTC/BURTC)
- 24-bit low-energy timer for waveform generation (LETIMER)
- 16-bit pulse counter with asynchronous operation (PCNT)
- Two watchdog timers (WDOG)
- One Universal Synchronous/Asynchronous Receiver/Transmitter (USART), supporting UART/SPI/SmartCard (ISO 7816)/IrDA/I²S
- Two Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART) supporting UART/SPI/DALI/IrDA
- Two I²C interfaces with SMBus support
- Low-frequency RC oscillator with precision mode to replace 32kHz sleep crystal (LFRCO)
- Keypad scanner supporting up to 6x8 matrix (KEYSCAN)
- Die temperature sensor with ±1.5°C accuracy after single-point calibration
Wide operating range
- 1.71V to 3.8V single power supply
- -40°C to +125°C
QFN40 5mm × 5mm × 0.85mm package