EFR32FG12 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 1 MB of flash and 256 kB of RAM
• Pin-compatible with EFR32FG1 QFN48
devices (exceptions apply for 5V-tolerant
pins)
Flex Gecko applications include:
• 12-channel Peripheral Reflex System,
Low-Energy Sensor Interface & Multi-
channel Capacitive Sense Interface
• Home and Building Automation and Security
• Metering
• Autonomous Hardware Crypto Accelerator
and True Random Number Generator
• Electronic Shelf Labels
• Industrial Automation
• Integrated PA with up to 19 dBm transmit
power for 2.4 GHz and 20 dBm for Sub-
GHz radios
• Commercial and Retail Lighting and Sensing
• Integrated balun for 2.4 GHz
• Robust peripheral set and up to 65 GPIO
Core / Memory
Clock Management
Energy Management
Other
CRYPTO
CRC
High Frequency
Crystal
Oscillator
High Frequency
RC Oscillator
Voltage
Voltage Monitor
Power-On Reset
Regulator
ARM CortexTM M4 processor
Memory
with DSP extensions and FPU
Protection Unit
Auxiliary High
Frequency RC
Oscillator
Low Frequency
RC Oscillator
DC-DC
Converter
True Random
Number Generator
Low Frequency
Crystal
Oscillator
Ultra Low
Frequency RC
Oscillator
Flash Program
RAM Memory
Memory
Debug Interface
with ETM
LDMA
Controller
Brown-Out
Detector
SMU
32-bit bus
Peripheral Reflex System
Radio Transceiver
Serial
I/O Ports
Timers and Triggers
Analog I/F
Interfaces
RFSENSE
Sub GHz
LNA
DEMOD
ADC
I
External
Interrupts
USART
Timer/Counter
Protocol Timer
RF Frontend
Analog
Comparator
IFADC
AGC
PGA
PA
Low Energy
UARTTM
General
Purpose I/O
Low Energy
Timer
Watchdog Timer
Q
IDAC
To Sub GHz
receive I/Q
mixers and PA
Real Time
Counter and
Calendar
RFSENSE
BALUN
Capacitive Sense
I2C
Pin Reset
Pulse Counter
2.4 GHz
LNA
I
Frequency
Synthesizer
MOD
VDAC
RF Frontend
Low Energy
Sensor Interface
Pin Wakeup
Cryotimer
Op-Amp
PA
To 2.4 GHz receive
I/Q mixers and PA
To Sub GHz
and 2.4 GHz PA
Q
Lowest power mode with peripheral operational:
EM0—Active EM1—Sleep
EM2—Deep Sleep
EM3—Stop
EM4—Hibernate
EM4—Shutoff
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