EFR32 : SOC Transceiver Module With Arm Cortex 4 & High Sensitivity DSSS

The EFR32 module is our latest low-power, high-performance wireless communication module(SOC transceiver module). It is developed based on SILICON’s EFR32FG14. It adopts advanced direct sequence spread spectrum communication modulation technology (DSSS), and higher performance 32-bit ARM®Cortex®-M4.
SOC transceiver module EFR32 is easy in the secondary development of the module. The traditional wireless module is that the wireless transceiver chip and the MCU are independent of each other, and the MCU needs to control the wireless transceiver chip to transmit data wirelessly through SPI/IIC and other methods. The secondary development of EFR32 directly skips this cumbersome step, and can call the wireless library function when using the wireless function, which greatly accelerates the development progress.

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Parameters	Min.	Typ.	Max.	Unit	Condition
Temperature Parameter
Temperature range	-40	25	85	℃	When working
Temperature range	-40	25	125	℃	When storing
Voltage Parameter
Operating Voltage	1.8	3.3	3.6	V
Current Parameter
Emission current	-	<120	-	mA	19 dBm，868MHz
Receive current	-	<18		mA	2.4 Kbps, DSSS
Sleep current	-	<2.5	-	uA
RF Parameters
Transmit power	-43.5	19	22.9	dBm	1.2 Kbps, DSSS, 868 MHz
Receiving sensitivity	-	-128	-	dBm	1.2 Kbps, DSSS, 868 MHz
MCU Parameters
MCU	High Performance 32-bit 40 MHz ARM Cortex®-M4 with DSP instruction and floating-point unit for efficient signal processing
ADC	12-bit 1 Msps SAR Analog to Digital Converter
ACMP	2 × Analog Comparator
VDAC	2 × Digital to Analog Converter
Opamp	2 × Operational Amplifier
IDAC	Digital to Analog Current Converter
LESENSE	Low-Energy Sensor Interface
APORT	Up to 32 pins connected to analog channels shared between analog peripherals
I/O	Up to 32 General Purpose I/O pins with output state retention and asynchronous interrupts
DMA	8 Channel DMA Controller
PRS	12 Channel Peripheral Reflex System
TIMER	2 × 16-bit Timer/Counter , 1 × 32-bit Timer/Counter
RTC	32-bit Real Time Counter and Calendar
LETIMER	16-bit Low Energy Timer for waveform generation
ULETIMER	32-bit Ultra Low Energy Timer/Counter for periodic wake-up from any Energy Mode
WDT	2 × Watchdog Timer with dedicated RC oscillator
UART/SPI/ SmartCard/ IrDA/I2S	2 × Universal Synchronous/Asynchronous Receiver/Transmitter
LEUART™	Low Energy UART • I2C interface with SMBus support and address recognition in EM3 Stop

Special Function	SOC

Features of SOC Transceiver Module EFR32

Sleep current is less than 3.5uA
Integrated wireless transceiver and microprocessor on chip
Transparent data transmission
Data CRC check
Built-in hardware protection circuit
Receiving sensitivity up to -120dBm
RF Rate：600bps-500Kbps @GFSK 1.2Kbps-19.2Kbps @DSSS
Ultra long distance: more than 4km@1.2Kbps
Easy to develop
Integrated 2 operational amplifiers
12-bit 1Msps sampling high-speed and high-precision SARADC
Two 16-bit timers/counters
One 32-bit timer/counter
One 32-bit RTC timer
2 watchdog timers
16 general-purpose I/O pins
128K bytes Flash memory
16K bytes RAM memory
2 UART standard communication interface
1 LPUART low-power communication interface
8-channel DMA controller
Digital-to-analog current converter (IDAC)
Working temperature range: -40℃~+85℃
1.8V-3.8V power supply
Integrated power amplifier, the highest transmit power is 22.9 dBm (Sub-GHz)
Support multiple transmission protocols such as DSSS, GFSK, OOK, MSK, etc.
Support multiple modulation formats such as Wireless M-Bus, IEEE 802.15.4g SUN-FSK PHYs, etc.

Pin number	Pin definition	I/O	Description
1	PC10	I/O	GPIO pin
2	PC11	I/O	GPIO pin
3	PF0	I/O	GPIO pin
4	PF1	I/O	GPIO pin
5	PF2	I/O	GPIO pin
6	PF3	I/O	GPIO pin，TCXO
7	RESET	I	Reset input, active low. To apply an external reset source to this pin, it is only necessary to drive the pin low during reset and let the internal pull-up circuit ensure that the reset is released.
8、11、12、 14、23	GND	－	Power ground
9	PD13	I/O	GPIO pin
10	PD14	I/O	GPIO pin
13	ANT	Ｏ	Connect with 50 ohm load antenna
15	PD15	I/O	GPIO pin
16	PA0	I/O	GPIO pin
17	PA1	I/O	GPIO pin
18	PB11	I/O	GPIO pin
19	PB12	I/O	GPIO pin
20	PB13	I/O	GPIO pins, not available when using wireless
21	PB14	I/O	GPIO pin
22	PB15	I/O	GPIO pin
24	VCC	－	Power positive input (default 3.3V)