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EFR32BG22 Series 2 Bluetooth® Wireless SoC From Silicon Labs

IoT security is key to protecting company brands, end user privacy and commercial viability of products. Vulnerabilities can be exploited through both remote Internet attacks and physical hands-on-attacks.

Developers using the Silicon Labs wireless product portfolio including those in the EFR32BG22 portfolio have access to a number of technologies designed to protect their product, including Secure Debug, Secure Boot with Root of Trust & Secure Loader.


EFR32BG22 (BG22) Bluetooth low energy (LE) wireless SoC solutions are part of the Wireless Gecko Series 2 platform. The BG22 family's combination of best-in-class ultra-low transmit and receive power (4.1 mA TX at 0 dBm, 3.6 mA RX) and a high-performance, low-power Arm® Cortex®-M33 core (27 µA/MHz active, 1.2 µA sleep) delivers industry-leading energy efficiency that can extend coin cell battery life up to ten years. Target applications include Bluetooth mesh low-power nodes, smart door locks, personal healthcare and fitness devices. Asset tracking tags, beacons and indoor navigation also benefit from the SoCs' versatile Bluetooth Angle of Arrival (AoA) and Angle of Departure (AoD) capabilities and sub-one-meter location accuracy.


BG22 Security Features

  • Secure Boot with Root of Trust and Secure Loader (RTSL)

  • Hardware Cryptographic Acceleration for AES128/256, SHA-1, SHA-2 (up to 256-bit), ECC (up to 256-bit), ECDSA,and ECDH

  • True Random Number Generator (TRNG) compliant with NIST SP800-90 and AIS-31

  • ARM® TrustZone®

  • Secure Debug with lock/unlock


EFR32BG22 Common Specs


Low Power Wireless System-on-Chip

  • High Performance 32-bit 76.8 MHz ARM Cortex®-M33 with DSP instruction and floating-point unit for efficient signal processing

  • Up to 512 kB flash program memory

  • Up to 32 kB RAM data memory

  • 2.4 GHz radio operation


Radio Performance

  • -106.7 dBm sensitivity @ 125 kbps GFSK

  • -98.9 dBm sensitivity @ 1 Mbit/s GFSK

  • -96.2 dBm sensitivity @ 2 Mbit/s GFSK

  • TX power up to 6 dBm

  • 2.5 mA radio receive current

  • 3.4 mA radio transmit current @ 0 dBm output power

  • 7.5 mA radio transmit current @ 6 dBm output power


Low System Energy Consumption

  • 3.6 mA RX current (1 Mbps GFSK)

  • 4.1 mA TX current @ 0 dBm output power

  • 8.2 mA TX current @ 6 dBm output power

  • 27 μA/MHz in Active Mode (EM0) at 76.8 MHz

  • 1.40 μA EM2 DeepSleep current (32 kB RAM retention and RTC running from LFXO)

  • 1.75 μA EM2 DeepSleep current (32 kB RAM retention and RTC running from a precision LFRCO)

  • 0.17 μA EM4 current

Wide Selection of MCU Peripherals

  • 12-bit 1 Msps SAR Analog to Digital Converter (ADC)

  • Up to 26 General Purpose I/O pins with output state retention and asynchronous interrupts

  • 8 Channel DMA Controller

  • 12 Channel Peripheral Reflex System (PRS)

  • 4 × 16-bit Timer/Counter with 3 Compare/Capture/PWM channels

  • 1 × 32-bit Timer/Counter with 3 Compare/Capture/PWM channels

  • 32-bit Real Time Counter

  • 24-bit Low Energy Timer for waveform generation

  • 1 × Watchdog Timer

  • 2 × Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard (ISO 7816)/IrDA/I2S)

  • 1 × Enhanced Universal Asynchronous Receiver/Transmitter (EUART)

  • 2 × I2C interface with SMBus support

  • Digital microphone interface (PDM)

  • Precision Low-Frequency RC Oscillator to replace 32 kHz sleep crystal

  • RFSENSE with selective OOK mode

  • Die temperature sensor with +/-1.5 °C accuracy after single-point calibration

Supported Modulation Format

  • (G)FSK with fully configurable shaping

  • OQPSK DSSS

  • (G)MSK

Protocol Support

  • Bluetooth Low Energy (Bluetooth 5.2)

  • Direction finding using Angle-of-Arrival (AoA) and Angle-of-Departure (AoD)

  • 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

  • QFN32 4 mm × 4 mm × 0.85 mm

  • TQFN32 4 mm × 4 mm × 0.30 mm


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