EFR32xG1 Wireless Gecko
Reference Manual
The Wireless Gecko portfolio of SoCs (EFR32) include the
KEY FEATURES
EFR32MG1, EFR32BG1, and EFR32FG1 families. With support
®
for Bluetooth Low Energy (BLE), Zigbee , Thread and proprietary
• 32-bit ARM® Cortex-M4 core with 40 MHz
maximum operating frequency
protocols, the Wireless Gecko portfolio is ideal for enabling ener-
gy-friendly wireless networking for IoT devices.
• Scalable Memory and Radio configuration
options available in several footprint
compatible QFN packages
The single-die solution provides industry-leading energy efficiency, ultra-fast wakeup
times, a scalable high-power amplifier, an integrated balun and no-compromise MCU
features.
• 12-channel Peripheral Reflex System
enabling autonomous interaction of MCU
peripherals
• Autonomous Hardware Crypto Accelerator
and Random Number Generator
• Integrated balun for 2.4 GHz and
integrated PA with up to 19.5 dBm
transmit power for 2.4 GHz and 20 dBm
transmit power for Sub-GHz radios
• Integrated dc-dc with RF noise mitigation
Core / Memory
Clock Management
Energy Management
Other
High Frequency
Crystal Oscillator
High Frequency
RC Oscillator
Voltage
Regulators
Voltage Monitor
CRYPTO
ARM CortexTM M4 processor
Memory
with DSP extensions and FPU
Protection Unit
Auxiliary High
Frequency RC
Oscillator
Low Frequency
RC Oscillator
DC/DC Regulator
Power-On Reset
CRC
Ultra Low
Frequency RC
Oscillator
Flash Program
RAM Memory
Memory
Low Frequency
Crystal Oscillator
Brown-Out
Detector
Debug Interface
DMA Controlller
32-bit bus
Peripheral Reflex System
Radio Transceiver
Serial
I/O Ports
Timers and Triggers
Analog
Interfaces
Interfaces
RFSENSE
Sub GHz
LNA
External
Interrupts
DEMOD
USART
Timer/Counter
Protocol Timer
ADC
I
RF Frontend
Low Energy
UARTTM
General
Purpose I/O
Low Energy
Timer
Analog
Comparator
IFADC
AGC
PGA
Watchdog Timer
PA
Q
To Sub GHz
receive I/Q
mixers and PA
Real Time
Counter and
Calendar
I2C
Pin Reset
Pulse Counter
IDAC
RFSENSE
BALUN
2.4 GHz
LNA
I
Frequency
Synthesizer
MOD
Pin Wakeup
Cryotimer
RF Frontend
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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