SILICON LABS EFR32FG28B320F1024IM48-A

The EFR32FG28 SoC is an ideal dual band Sub-GHz + 2.4 GHz BLE SoC solution for “Internet of Things” applications in smart homes, security, lighting, building automation, and metering. This dual band solution combines a high-performance Sub-GHz radio that provides long range capabilities and a 2.4 GHz BLE radio for multiprotocol applications. The single die, multi-core solution, provides industry leading security, low power consumption with fast wakeup times, and integrated power amplifiers to enable the next level of secure connectivity for IoT devices. Large memory footprint enables flexible solutions for Dynamic Protocol support and the integration of a Matrix Vector Processor empowers AI/ML implementation for Smart End Nodes.

• 32-bit ARM Cortex-M33 core with 78 MHz maximum operating frequency
• 1024 kB of flash and up to 256 kB of RAM
• Energy-efficient radio core with low active and sleep currents
• Integrated PAs with up to 20 dBm for subGHz and 10 dBm for BLE transmit power
• Robust peripheral set and up to 49 GPIO
• QFN48 and QFN68 package options
• High Performance 32-bit 78 MHz ARM Cortex-M33 with DSP instruction and floating-point unit for efficient signal processing
• Up to 1024 kB flash program memory
• Up to 256 kB RAM data memory
• Sub-GHz radio operation with TX power up to +20 dBm
• 2.4 GHz BLE radio operation with TX power up to +10 dBm
• Matrix Vector Processor for AI/ML acceleration
• 4.4 mA RX current at 920 MHz (400 kbps 4-FSK)
• 4.0 mA RX current at 915 MHz (4.8 kbps O-QPSK)
• 5.4 mA RX current at 915 MHz (2 Mbps GFSK)
• 3.9 mA RX current at 868 MHz (2.4 kbps GFSK)
• 3.9 mA RX current at 868 MHz (38.4 kbps FSK)
• 4.2 mA RX current at 433 MHz (100 kbps 2GFSK)
• 5.2 mA RX current at 2.4 GHz, 1 Mbps BLE
• 25.7 mA TX current @ 14 dBm output power at 915 MHz (14 dBm part numbers)
• 12.3 mA TX current @ 0 dBm output power, 2.4 GHz
• 23.2 mA TX current @ 10 dBm output power, 2.4 GHz
• 33 μA/MHz in Active Mode (EM0) at 39.0 MHz
• 2.8 μA EM2 DeepSleep current (256 kB RAM retention and RTC running from LFXO)
• 1.3 μA EM2 DeepSleep current 16 kB RAM retention and RTC running from LFRCO)
• Preamble Sense Mode (PSM) low duty-cycle listen
• -98.1 dBm sensitivity @ 400 kbps 920 MHz 4-GFSK
• -124.8 dBm sensitivity @ 4.8 kbps 915 MHz O-QPSK
• -96.0 dBm sensitivity @ 2 Mbps 915 MHz GFSK
• -124.1 dBm sensitivity @ 2.4 kbps 868 MHz GFSK
• -110.4 dBm sensitivity @ 38.4 kbps 868 MHz FSK
• -110.6 dBm sensitivity @ 100 kbps 433 MHz 2GFSK
• 2/4 (G)FSK with fully configurable shaping
• OQPSK DSSS
• (G)MSK
• OOK
• Proprietary
• CONNECT
• Amazon Sidewalk
• WM-BUS
• Wi-SUN
• Bluetooth Low Energy
• Analog to Digital Converter (ADC) 12-bit @ 1 Msps
• 16-bit @ 76.9 ksps
• 2x Analog Comparator (ACMP)
• 2-Channel Digital to Analog Converter (VDAC)
• Low-Energy Sensor Interface (LESENSE)
• Up to 49 General Purpose I/O pins with output state retention and asynchronous interrupts
• 8 Channel DMA Controller
• 12 Channel Peripheral Reflex System (PRS)
• 4x16-bit Timer/Counter with 3 Compare/Capture/PWM channels
• 1x32-bit Timer/Counter with 3 Compare/Capture/PWM channels
• 32-bit Real Time Counter
• 24-bit Low Energy Timer for waveform generation
• 16-bit Pulse Counter with asynchronous operation (PCNT)
• 2x Watchdog Timer
• 3x Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART)
• 1x Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard (ISO 7816)/IrDA/I2S)
• 2x120 interface with SMBus support
• Integrated Low-Energy LCD Controller supporting up to 192 segments
• Keypad scanner supporting up to 6x8 matrix (KEYSCAN)
• Die temperature sensor with ±2 °C typical accuracy across temperature range
• 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
• 1.71 V to 3.8 V single power supply
• -40 °C to +125 °C
• QFN68 8 mm x 8 mm x 0.85 mm
• QFN48 6 mm x 6 mm x 0.85 mm

• Metering
• Home and Building Automation and Security
• Industrial Automation
• Street Lighting