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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.
| Parameters | Min. | Typ. | Max. | Unit | Condition |
| Temperature Parameter | |||||
| Temperature range | -40 | 25 | 85 | ℃ | When working |
| -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.
Applications of SOC Transceiver Module EFR32
- Home and building automation and security
- Commercial and retail lighting and sensing
- Automated industry
- Electronic shelf label
- Remote meter reading
| 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) |
