EFR32BG24 Series 2 Bluetooth® Wireless SoC

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

• QFN Package
  • -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
• CSP Package
  • -106.2 dBm sensitivity @ 125 kbps GFSK
  • -98.1 dBm sensitivity @ 1 Mbit/s GFSK
  • -95.4 dBm sensitivity @ 2 Mbit/s GFSK
  • TX power up to 4 dBm

Low System Energy Consumption

• 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)
• QFN Package
  • 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
• CSP Package
  • 4.2 mA RX current (1 Mbps GFSK)
  • 4.8 mA TX current @ 0 dBm output power
  • 11.0 mA TX current @ 4 dBm output power

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)
• 2 x 32-bit Real Time Counter (SYSRTC/BURTC)
• 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
• Channel Sounding

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
  • (AEC-Q100 Certified options available)       
    
• QFN48 6 mm × 6 mm × 0.85 mm
  • (AEC-Q100 Certified options available)
• WLCSP42 3.1 mm x 3.0 mm x 0.4 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