EFR32FG28 Wireless SoC Family Data
Sheet
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,
KEY FEATURES
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.
• 32-bit ARM® Cortex®-M33 core with 78
MHz maximum operating frequency
The single die, multi-core solution, provides industry leading security, low power con-
sumption with fast wakeup times, and integrated power amplifiers to enable the next lev-
el of secure connectivity for IoT devices. Large memory footprint enables flexible solu-
tions for Dynamic Protocol support and the integration of a Matrix Vector Processor em-
powers AI/ML implementation for Smart End Nodes.
• 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 sub-
GHz and 10 dBm for BLE transmit power
• Robust peripheral set and up to 49 GPIO
• QFN48 and QFN68 package options
EFR32FG28 applications include:
• Metering
• Home and Building Automation and Security
• Industrial Automation
• Street Lighting
Core / Memory
Clock Management
Energy Management
DC-DC Buck Voltage
Security
Features
Secure Boot
HF Crystal
HF
available
down to
ARM CortexTM M33
DSP extensions, FPU,
TrustZone
Flash
AI/ML
Hardware
Accelerator
Crypto
Acceleration,
RTSL
Oscillator
RC Oscillator
Memory
1024 kB
Regulator
Regulators
Energy Mode:
TRNG, PUF Key
Secure Debug
Fast Startup
LF RC
RC Oscillator Oscillator
EM0
Run
8-Channel
Linked DMA
Controller
Debug Interface
SWD, ETM, JTAG
RAM Memory
256 kB
Brown-Out
Detectors
Power-On
Reset
DPA
Countemeasures
LF Crystal
Oscillator
Ultra LF RC
Oscillator
Tamper Detect
EM1
Sleep
32-bit bus
12-Channel Peripheral Reflex System
Timers and Triggers
EM2
Deep Sleep
Radio
Serial Interfaces
I/O Ports
Analog I/F
12-16 bit ADC
12-bit VDAC
2x 32-bit, 3-ch
Timers
3x 16-bit, 3-ch
Timers
Sub-GHz RX/TX
with +14 or +20 dBm PA
Keypad
Scanner
LCD
Controller
2x EUSART
1x EUSART
EM3
Stop
UART, SPI
UART, SPI
Protocol Timer
LESENSE
EM4
Shutoff
2.4 GHz BLE RX/TX
with +10 dBm PA
External
Interrupts
General
Purpose I/O
1x I2C
1x I2C
2-ch Low
Energy Timer
System Real
Time Counter
Analog
Comparator
1x USART
UART, SPI, I2S
2x Watchdog
Timer
Back-Up Real
Time Counter
Temperature
Sensor
M0+ Radio Controller
Pin Reset
Pin Wakeup
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