EFR32BG21 Series 2 Bluetooth® Wireless SoC

Wireless Gecko Series 2 devices are the next evolution of Wireless Gecko devices bringing high performance, low power and secure solutions to the Internet of Things. Designed to increase processing capability, improve RF performance and lower active current, the devices also provide a higher level of security.

EFR32BG21 devices are 2.4 GHz wireless SOCs optimized for line-powered Bluetooth Low Energy and Bluetooth mesh applications, including connected lighting, smart plugs, gateways and voice assistants. An 80 MHz ARM® Cortex®-M33 core provides plenty of processing capability while a dedicated security core provides faster encryption, secure boot loading and debug access control. With better than -104 sensitivity for Bluetooth Long Range and up to +20 dBm output power, EFR32BG21 devices provide a robust RF link to ensure reliable communications. Series 2 uses the same tools as Series 1, providing easy migration and fast time-to-market with development kits, SDKs, mobile apps and our patented network analyzer.

Supports
Bluetooth 5. & Bluetooth Mesh
Link budget
124 dBm

EFR32BG21 Common Specs

Bluetooth Low Energy Radio

  • Compatible with Bluetooth 5, Bluetooth 5.1 and Bluetooth mesh specification
  • Excellent receive sensitivity:
    • - 105.1 dBm @ 125 kbps GFSK to -104.9 dBm @125 kbps GFSK
    • -97.5 dBm @1 Mbps GFSK
    • -94.4 dBm @2 Mbps GFSK
  • Programmable output power: Up to +20 dBm
  • Active mode RX: 8.8 mA
  • Active mode TX: 10.5 mA @ 0 dBm to Active Mode TX: 9.8 mA @0 dBm
  • Active mode TX: 33.1 mA @ 10 dBm to active mode TX: 33.8 mA @ 10 dBm

Rich Analog and Digital Peripherals

  • 12-bit 1 Msps SAR Analog to Digital Converter (ADC)
  • Analog Comparators (ACMP)
  • 8 Channel DMA Controller
  • Peripheral Reflex System (PRS)
  • PTA (Packet Traffic Arbitration) for Wi-Fi Coexistence
  • 16-bit Timer/Counters
    • 3 Compare/Capture/PWM channels per Timer
  • 32-bit Timer/Counter
    • 3 Compare/Capture/PWM channels per Timer
  • 32-bit Real Time Counter
  • 24-bit Low Energy Timer for waveform generation
  • Watchdog Timers
  • Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard(ISO 7816)/IrDA/I2S)
  • I2C interface with SMBus support
  • Up to 20 General Purpose I/O pins
    • Output state retention and asynchronous interrupts

Powerful MCU & Memory Options

  • ARM® Cortex®-M33
    • Floating-Point Unit
  • Up to 80 MHz Clock Speed
  • Low Active Mode Current: 50.9 µA/MHz
  • Up to 1024 kB of Programmable Flash
  • Up to 96 kB SRAM

Package Options

  • QFN32 (4 mm x 4 mm)

Security

  • Hardware Cryptographic Acceleration
    • AES (128/192/256), SHA-1, SHA-2 (SHA-224/SHA256), ECC (256-bit), ECDSA (256-bit) and ECDH (p192, p256), HMAC, J-PAKE
  • True Random Number Generator (TRNG)
  • Secure Boot
  • Secure Debug / Debug Access Control
  • Unique ID
Status
Find the Right EFR32BG21 Device Select Columns
Select Columns
Part Number MCU Core Core Frequency (MHz) Flash RAM Bluetooth 5.1 Bluetooth 5 Bluetooth Mesh Cryptography Output Power Range (dBm) Receive Sensitivity GPIO RX Current (mA) TX Current A (dBm) UART USART LEUART I²C SPI I²S ADC Comparators DAC Timers (16-bit) Temperature Range ºC Package Type Package Size (mm)
ARM Cortex-M33 80 1024 96 AES-256 ECC SHA-1 SHA-2 -20 10 -97 (1 Mbit/s GFSK) 20 8.7 0 3 3 0 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4
ARM Cortex-M33 80 512 64 AES-256 ECC SHA-1 SHA-2 -20 10 -97 (1 Mbit/s GFSK) 20 8.7 0 3 3 0 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4
ARM Cortex-M33 80 768 64 AES-256 ECC SHA-1 SHA-2 -20 10 -97 (1 Mbit/s GFSK) 20 8.7 0 3 3 0 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4
ARM Cortex-M33 80 1024 96 AES-256 ECC SHA-1 SHA-2 -20 20 -97 (1 Mbit/s GFSK) 20 8.7 0 3 3 0 2 3 2 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4
ARM Cortex-M33 80 512 64 AES-256 ECC SHA-1 SHA-2 -20 20 -97 (1 Mbit/s GFSK) 20 8.7 0 3 3 0 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4
ARM Cortex-M33 80 768 64 AES-256 ECC SHA-1 SHA-2 -20 20 -97 (1 Mbit/s GFSK) 20 8.7 0 3 3 0 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4

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