Silicon Labs EFR32BG24 Bluetooth Wireless SoCs

Silicon Labs EFR32BG24 Bluetooth Wireless SoCs are designed for wireless connectivity using BLUETOOTH® Low Energy and BLUETOOTH mesh. The EFR32BG24 Bluetooth Wireless SoCs feature a high-performance 2.4GHz RF, low current consumption, an AI/ML hardware accelerator, and Secure Vault™. The device allows users of IoT to create smart, robust, and energy-efficient products that are secure from remote and local cyber-attacks.

The Silicon Labs EFR32BG24 Bluetooth Wireless SoCs incorporate a Cortex®-M33 running up to 78MHz, while up 256kB of RAM and up to 1536kB of Flash supports resources for demanding applications and providing room for future growth.

Features

32-bit Arm® Cortex®-M33 core with 78MHz 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

Portable Medical Devices - Blood glucose meters, pulse oximeters
AI/ML - Predictive maintenance, glass break detection, wake-word detection

Specifications

Low power wireless system-on-chip
- High performance 32-bit 78MHz 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
- Matrix vector processor for AI/ML acceleration
Radio performance
- -105.7dBm sensitivity @ 125kbps GFSK
- -97.6dBm sensitivity @ 1Mbps GFSK
- -94.8dBm sensitivity @ 2Mbps GFSK
- TX power up to 19.5dBm
Low System Energy Consumption
- 4.4mA RX current (1Mbps GFSK)
- 5mA TX current @ 0dBm output power
- 19.1mA TX current @ 10dBm output power
- 156.8mA TX current @ 19.5dBm output power
- 33.4μA/MHz in Active Mode (EM0) at 39MHz
- 1.3μA EM2 DeepSleep current (16kB RAM retention and RTC running from LFRCO)
Supported modulation format
- 2 (G)FSK with fully configurable shaping
- OQPSK DSSS
- (G)MSK
Protocol support
- BLUETOOTH® Low Energy (BLE 5.3)
- BLUETOOTH mesh
- Proprietary 2.4GHz
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 @ 1Msps or 16-bit @ 76.9ksps
  - Select OPNs to 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)
- 2 × 32-bit Real Time Counter (SYSRTC/BURTC)
- 24-bit Low Energy Timer for waveform generation (LETIMER)
- 16-bit Pulse Counter with an 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 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
Packages
- QFN40 5mm × 5mm × 0.85mm
- QFN48 6mm × 6mm × 0.85mm