EFR32BG24 Series 2 Bluetooth LE SoC

EFR32BG24 Series 2 Bluetooth® Wireless SoC

The EFR32BG24 Wireless SoCs are ideal for IOT wireless connectivity using Bluetooth Low Energy and Bluetooth mesh for smart home, lighting, and portable medical products. With key features like high performance 2.4 GHz RF, low current consumption, an AI/ML hardware accelerator and Secure Vault™, IoT device makers can create the smart, robust, and energy-efficient products that are secure from remote and local cyber-attacks. An ARM Cortex®-M33 running up to 78 MHz and up to 1.5 MB of Flash and 256 kB of RAM provides resources for demanding applications while leaving room for future growth. Target applications include gateways/hubs, sensors, switches, door locks, smart plugs, LED lighting, luminaires, blood glucose meters and pulse oximeters.

EFR32BG24 Common Specs

Low Power Wireless System-on-Chip

High Performance 32-bit 78.0 MHz ARM Cortex®-M33 with DSP instruction and floating-point unit for efficient signal processing
Up to 1536 kB flash program memory
Up to 256 kB RAM data memory
2.4 GHz radio operation

Radio Performance

-105.7 dBm sensitivity @ 125 kbps GFSK
-97.6 dBm sensitivity @ 1 Mbit/s GFSK
-94.8 dBm sensitivity @ 2 Mbit/s GFSK
TX power up to 19.5 dBm

Low System Energy Consumption

4.4 mA RX current (1 Mbps GFSK)
5 mA TX current @ 0 dBm output power
19.1 mA TX current @ 10 dBm output power
156.8 mA TX current @ 19.5 dBm output power
33.4 μA/MHz in Active Mode (EM0) at 39.0 MHz
1.3 μA EM2 DeepSleep current (16 kB RAM retention and RTC running from LFRCO)

Wide Selection of MCU Peripherals

Analog to Digital Converter (IADC)
- 12-bit @ 1 Msps or 16-bit @ 76.9 ksps
- Select OPNs support High Speed Mode (up to 2 Msps) and High Accuracy Mode (up to 16 bits ENOB at 3.8 ksps)
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 32 kHz sleep crystal (LFRCO)
Keypad scanner supporting up to 6x8 matrix (KEYSCAN)
Die temperature sensor with +/- 1.5 °C accuracy after single-point calibration

Supported Modulation Format

2 (G)FSK with fully configurable shaping
(G)MSK

Protocol Support

Bluetooth Low Energy (Bluetooth 5.4)
Direction finding using Angle-of-Arrival (AoA) and Angle-of-Departure (AoD)
Bluetooth mesh
Proprietary

Wide Operation Range

1.71 V to 3.8 V single power supply
-40 °C to 125 °C

Packages

QFN40 5 mm × 5 mm × 0.85 mm
QFN48 6 mm × 6 mm × 0.85 mm

BG24 Security Features

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

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