RF-star RF-BM-BG22A3

The RF-BM-BG22A3 module is a long-range, low-power Bluetooth module designed with the EFR32BG22C224F512GM32-C chip, featuring a maximum output power of 6 dBm and a receive sensitivity of -106.7 dBm (125 kbps GFSK). The module is improved upon a stable reference design and supports Bluetooth 5.2. It employs a 1/4-wavelength serpentine antenna output configuration. The module delivers excellent ultra-low power performance, with a TX current of 4.1 mA @ 0 dBm output power and an RX current of 3.6 mA (1 Mbit/s GFSK).

• High-performance 32-bit 76.8 MHz ARM Cortex-M33 with DSP instructions and FPU for efficient signal processing
• Up to 512 kB flash program memory
• Up to 32 kB RAM data memory
• 2.4 GHz radio operation
• Sensitivity of -106.7 dBm at 125 kbps GFSK
• Sensitivity of -98.9 dBm at 1 Mbit/s GFSK
• Sensitivity of -96.2 dBm at 2 Mbit/s GFSK
• TX power up to 6 dBm
• Radio RX current of 2.5 mA
• Radio TX current of 3.4 mA at 0 dBm output power
• Radio TX current of 7.5 mA at 6 dBm output power
• RX current of 3.6 mA (1 Mbps GFSK)
• TX current of 4.1 mA at 0 dBm output power
• TX current of 8.2 mA at 6 dBm output power
• Active mode (EM0) power consumption of 27 μA/MHz at 76.8 MHz
• 1.40 μA EM2 deep sleep current (32 kB RAM retained, RTC running from LFXO)
• 1.75 μA EM2 deep sleep current (32 kB RAM retained, RTC running from Precision LFRCO)
• 0.17 μA EM4 current
• 2 (G)FSK with configurable full waveform
• OQPSK DSSS
• (G)MSK
• Bluetooth Low Energy (Bluetooth 5.2)
• Direction finding via Angle of Arrival (AoA) and Angle of Departure (AoD)
• Proprietary protocol
• 12-bit 1 Msps SAR ADC
• Up to 18 general-purpose I/O pins with output state retention and asynchronous interrupt
• 8-channel DMA controller
• 12-channel Peripheral Reflex System (PRS)
• 4× 16-bit timer/counters (3 compare/capture/PWM channels)
• 1× 32-bit timer/counter (3 compare/capture/PWM channels)
• 32-bit real-time counter
• 24-bit low-energy timer for waveform generation
• 1 watchdog timer
• 2× USART (UART/SPI/SmartCard (ISO 7816)/IrDA/I2S)
• 1× EUART
• 2× I²C interfaces with SMBus support
• Digital microphone interface (PDM)
• 32 kHz sleep crystal replacement with precision low-frequency RC oscillator
• RFSENSE with optional OOK mode
• On-chip temperature sensor with ±1.5 °C accuracy after single-point calibration
• Secure boot via 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 functionality

• Asset tags and beacons
• Consumer electronics remote controls
• Portable medical devices
• Bluetooth mesh network low-power nodes
• Sports, fitness, and wellness equipment
• Connected home
• Building automation and security