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EFR32xG1 Wireless Gecko
Reference Manual
The Wireless Gecko portfolio of SoCs (EFR32) include Mighty
Gecko (EFR32MG1), Blue Gecko (EFR32BG1), and Flex Gecko
(EFR32FG1) families. With support for Bluetooth Smart (BLE),
ZigBee, Thread and proprietary protocols, the Wireless Gecko
portfolio is ideal for enabling energy-friendly wireless networking
for IoT devices.
The single-die solution provides industry-leading energy ef
ficiency, ultra-fast wakeup
times, a scalable high-power amplifier, an integrated balun and no-compromise MCU
features.
KEY FEATURES
• 32-bit ARM® Cortex-M4 core with 40 MHz
maximum operating frequency
•
Scalable Memory and Radio configuration
options available in several footprint
compatible QFN packages
• 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
Lowest power mode with peripheral operational:
EM3—StopEM2—Deep SleepEM1—Sleep EM4—Hibernate EM4—ShutoffEM0—Active
32-bit bus
Peripheral Reflex System
Timers and Triggers
Real Time
Counter and
Calendar
Cryotimer
Timer/Counter
Low Energy
Timer
Pulse Counter
Watchdog Timer
Protocol Timer
Serial
Interfaces
I/O Ports Analog
Interfaces
USART
Low Energy
UART
TM
I
2
C
External
Interrupts
General
Purpose I/O
Pin Reset
Pin Wakeup
ADC
IDAC
Analog
Comparator
Radio Transceiver
DEMOD
AGC
IFADC
CRC
BUFC
RFSENSE
MOD
FRC
RAC
Frequency
Synthesizer
PGA
PA
I
Q
RF Frontend
LNA
RFSENSE
PA
I
Q
RF Frontend
LNA
To 2.4 GHz receive
I/Q
mixers and PA
To Sub GHz
receive
I/Q
mixers and PA
To Sub GHz
and 2.4 G
Hz PA
Sub GHz
2.4 GHz
BALUN
Core / Memory
Flash Program
Memory
RAM Memory
ARM Cortex
TM
M4 processor
with DSP extensions and FPU
Memory
Protection Unit
Debug Interface DMA Controlller
Other
CRYPTO
CRC
Clock Management
High Frequency
Crystal Oscillator
High Frequency
RC Oscillator
Low Frequency
Crystal Oscillator
Low Frequency
RC Oscillator
Auxiliary High
Frequency RC
Oscillator
Energy Management
Voltage Monitor
Brown-Out
Detector
Power-On ResetDC/DC Regulator
Voltage
Regulators
Ultra Low
Frequency RC
Oscillator
silabs.com | Smart. Connected. Energy-friendly
. Preliminary Rev. 0.6
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
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