EFR32FG1 Flex Gecko Proprietary
Protocol SoC Family Data Sheet
The Flex Gecko proprietary protocol family of SoCs is part of the
KEY FEATURES
Wireless Gecko portfolio. Flex Gecko SoCs are ideal for enabling
energy-friendly proprietary protocol networking for IoT devices.
• 32-bit ARM® Cortex®-M4 core with 40
MHz maximum operating frequency
The single-die solution provides industry-leading energy efficiency, ultra-fast wakeup
times, a scalable power amplifier, an integrated balun and no-compromise MCU fea-
tures.
• Up to 256 kB of flash and 32 kB of RAM
• 12-channel Peripheral Reflex System
enabling autonomous interaction of MCU
peripherals
Flex Gecko applications include:
• Autonomous Hardware Crypto Accelerator
and Random Number Generator
• Home and Building Automation and Security
• Metering
• Integrated PA with up to 19 dBm (2.4
GHz) or 20 dBm (Sub-GHz) TX power
• Electronic Shelf Labels
• Integrated balun for 2.4 GHz
• Industrial Automation
• Robust peripheral set and up to 32 GPIO
• Commercial and Retail Lighting and Sensing
Core / Memory
Clock Management
Energy Management
Other
High Frequency
Crystal
Oscillator
High Frequency
RC Oscillator
Voltage
CRYPTO
Voltage Monitor
Regulator
ARM CortexTM M4 processor
Memory
with DSP extensions and FPU
Protection Unit
Auxiliary High
Frequency RC
Oscillator
Low Frequency
RC Oscillator
DC-DC
Power-On Reset
Converter
CRC
Low Frequency
Crystal
Oscillator
Ultra Low
Frequency RC
Oscillator
Flash Program
RAM Memory
Memory
Brown-Out
Detector
Debug Interface
DMA Controller
32-bit bus
Peripheral Reflex System
Radio Transceiver
Serial
I/O Ports
Timers and Triggers
Analog I/F
Interfaces
External
Interrupts
Sub-GHz RF
Frontend:
LNA, PA,
DEMOD
USART
Timer/Counter
Protocol Timer
ADC
I/Q Mixer
Low Energy
UARTTM
General
Purpose I/O
Low Energy
Timer
Analog
Comparator
IFADC
AGC
PGA
Watchdog Timer
RFSENSE
Real Time
Counter and
Calendar
I2C
Pin Reset
Pulse Counter
IDAC
2.4 GHz RF
Frontend:
LNA, PA,
I/Q Mixer
Frequency
Synthesizer
BALUN
To RF
Frontend
Circuits
MOD
Pin Wakeup
Cryotimer
Lowest power mode with peripheral operational:
EM0—Active EM1—Sleep
EM2—Deep Sleep
EM3—Stop
EM4—Hibernate
EM4—Shutoff
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