原标题：Silabs EFR32MG22无线Gecko多协议SoC开发方案

　　Silabs公司的EFR32MG22是无线Gecko多协议系统级芯片(SoC),具有能量友好和高性能无线电收发器.单芯片解决方案组合了76.8 MHz MHz ARM Cortex-M33 MCU和高性能2.4GHz无线电,集成了512kB闪存和32kB RAM,12路外设反射系统,使得成为MCU自主互动外设,集成了多达6 dBm (2.4 GHz) TX功率的功率放大器(PA).器件具有DSP指令和浮点单元,以用于高效的信号处理.其无线电收发器在250 kbps O-QPSK DSSS的灵敏度为-102.3dBm,在125 kbps GFSK时为灵敏度为-106.7dBm,在1 Mbit/s GFSK的灵敏度为-98.9 dBm, 在2 Mbit/s GFSK的灵敏度为-96.2 dBm,发送功率高达6dBm,无线接收电流为2.5mA,0 dBm输出功率时为3.4mA无线发送电流,6 dBm输出功率时为7.5mA无线发送电流,主要用在ZigBee终端设备家庭自动化,照明控制,建筑物控制和工业传感器.本文介绍了EFR32MG22主要特性, 框图,应用电路以及EFR32xG22 2.4 GHz 6 dBm无线启动板(WSTK)主要特性,框图,电路图和主板连接器布局图.

　　The EFR32 product family combines an energy-friendly MCU with a high performance radio transceiver. The devices are well suited for secure connected IoT multi-protocol devices requiring high performance and low energy consumption. This section gives a short introduction to the full radio and MCU system. The detailed functional description can be found in the EFR32xG22 Reference Manual.

　　The EFR32MG22 Wireless Gecko multiprotocol family of SoCs is part of the Wireless Gecko portfolio. EFR32MG22 Wireless Gecko SoCs are ideal for enabling energy-friendly multiprotocol networking for IoT devices.

　　The single-die solution combines a 76.8 MHz MHz ARM Cortex-M33 with a high performance 2.4 GHz radio to provide an industry-leading, energy efficient, wireless SoC for IoT connected applications.

　　EFR32MG22主要特性:

　　• 32-bit ARM® Cortex®-M33 core with 76.8 MHz maximum operating frequency

　　• Up to 512 kB of flash and 32 kB of RAM

　　•12-channel Peripheral Reflex System enabling autonomous interaction of MCU peripherals

　　• Integrated PA with up to 6 dBm (2.4 GHz) TX power

　　• Secure Boot with Root of Trust and Secure Loader (RTSL)

　　EFR32MG22应用:

　　Zigbee Green Power

　　• Zigbee End Devices Home Automation

　　• Lighting Controls

　　• Building Controls

　　• Industrial Sensors

　　图1. EFR32MG22框图

　　EFR32MG22主要特性:

　　• Low Power Wireless System-on-Chip

　　• High Performance 32-bit 76.8 MHz MHz ARM Cortex®-M33 with DSP instruction and floating-point unit for efficient signal processing

　　• Up to 512 kB flash program memory

　　• Up to 32 kB RAM data memory

　　• 2.4 GHz radio operation

　　• Radio Performance

　　• -102.3 dBm sensitivity @ 250 kbps O-QPSK DSSS

　　• -106.7 dBm sensitivity @ 125 kbps GFSK

　　• -98.9 dBm sensitivity @ 1 Mbit/s GFSK

　　• -96.2 dBm sensitivity @ 2 Mbit/s GFSK

　　• TX power up to 6 dBm

　　• 2.5 mA radio receive current

　　• 3.4 mA radio transmit current @ 0 dBm output power

　　• 7.5 mA radio transmit current @ 6 dBm output power

　　• Low System Energy Consumption

　　• 3.6 mA RX current (1 Mbps GFSK)

　　• 3.9 mA RX current (250 kbps O-QPSK DSSS)

　　• 4.1 mA TX current @ 0 dBm output power

　　• 8.2 mA TX current @ 6 dBm output power

　　• 26 μA/MHz in Active Mode (EM0) at 38.4 MHz

　　• 1.40 μA EM2 DeepSleep current (32 kB RAM retention and RTC running from LFRCO)

　　• 0.17 μA EM4 current

　　• Supported Modulation Format

　　• 2 (G)FSK with fully configurable shaping

　　• OQPSK DSSS

　　• (G)MSK

　　• Protocol Support

　　• Bluetooth Low Energy (Bluetooth 5.2)

　　• Direction finding using Angle-of-Arrival (AoA) and Angle-of-

　　Departure (AoD)

　　• Zigbee

　　• Proprietary

　　• Wide selection of MCU peripherals

　　• 12-bit 1 Msps SAR Analog to Digital Converter (ADC)

　　• Up to 26 General Purpose I/O pins with output state retention and asynchronous interrupts

　　• 8 Channel DMA Controller

　　• 12 Channel Peripheral Reflex System (PRS)

　　• 4 × 16-bit Timer/Counter with 3 Compare/Capture/PWM channels

　　• 1 × 32-bit Timer/Counter with 3 Compare/Capture/PWM channels

　　• 32-bit Real Time Counter

　　• 24-bit Low Energy Timer for waveform generation

　　• 1 × Watchdog Timer

　　• 2 × Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard (ISO 7816)/IrDA/I2S)

　　• 1 × Enhanced Universal Asynchronous Receiver/Transmitter (EUART)

　　• 2 × I2C interface with SMBus support

　　• Digital microphone interface (PDM)

　　• Precision Low-Frequency RC Oscillator to replace 32 kHz sleep crystal

　　• RFSENSE with selective OOK mode

　　• Die temperature sensor with +/-1.5 degree C accuracy after single-point calibration

　　• Wide Operating Range

　　• 1.71 V to 3.8 V single power supply

　　• -40℃ to 125℃

　　• Security Features

　　• Secure Boot with Root of Trust and Secure Loader (RTSL)

　　• Hardware Cryptographic Acceleration for AES128/256, SHA-1, SHA-2 (up to 256-bit), ECC (up to 256-bit), ECDSA, and ECDH

　　• True Random Number Generator (TRNG) compliant with NIST SP800-90 and AIS-31

　　• ARM® TrustZone®

　　• Secure Debug with lock/unlock

　　• Packages

　　• QFN40 5 mm × 5 mm × 0.85 mm

　　• QFN32 4 mm × 4 mm × 0.85 mm

　　• TQFN32 4 mm × 4 mm × 0.30 mm

　　图2. EFR32MG22详细框图

　　图3. EFR32MG22应用电路:不用DCDC的直接电源配置图

　　图4. EFR32MG22应用电路:DCDC配置图

　　EFR32xG22 2.4 GHz 6 dBm无线启动板(WSTK)

　　A Wireless Starter Kit with the BRD4182A Radio Board is an excellent starting point to get familiar with the EFR32™ Wireless Gecko Wireless System-on-Chip. It also provides all necessary tools for developing a Silicon Labs wireless application.

　　BRD4182A is a plug-in board for the Wireless Starter Kit Mainboard. It is a complete reference design for the EFR32xG22 Wireless SoC, with matching network and a PCB antenna for 6 dBm output power in the 2.4 GHz band.

　　The Wireless Starter Kit Mainboard contains an on-board J-Link debugger with a Packet Trace Interface and a Virtual COM port, enabling application development and debugging of the attached radio board as well as external hardware. The mainboard also contains sensors and peripherals for easy demonstration of some of the EFR32 ’ s many capabilities.

　　The EFR32xG22 (xG22) Wireless Starter Kit (WSTK) supports Bluetooth, Zigbee and Proprietary wireless protocols. This WSTK includes two +6 dBm radio boards that are complete reference designs for EFR32xG22 Wireless SoCs, with matching network and PCB antennas for +6 dBm output power in the 2.4 GHz band. It also contains an on-board J-Link debugger with a Packet Trace Interface and a Virtual COM port, enabling application development and debugging of the attached radio board as well as external hardware. The xG22 WSTK provides all the necessary tools for developing high-volume, scalable wireless IoT applications.

　　Kit Contents

　　1x BRD4001A Wireless Starter Kit Mainboard

　　1x BRD4182A EFR32xG22 2.4 GHz +6 dBm

　　5x5 mm QFN40 Radio Board

　　1x BRD4183A EFR32xG22 2.4 GHz +6 dBm

　　4x4 mm QFN32 Radio Board

　　1x USB Type A to Mini-B cable

　　1x 10-pin 1.27 mm IDC debug cable

　　1x BRD8010A Debug Adapter Board

　　Getting Started Card

　　This document describes how to use the BRD4182A Radio Board together with a Wireless Starter Kit Mainboard.

　　BRD4182A RADIO BOARD FEATURES

　　• EFR32xG22 Wireless Gecko Wireless SoC with 512 kB Flash and 32 kB RAM (EFR32MG22C224F512IM40).

　　• Inverted-F PCB antenna (2.4 GHz band)

　　• 8 Mbit low-power serial flash for over-theair Upgrades

　　EFR32xG22 2.4 GHz 6 dBm无线启动板(WSTK)主要特性:

　　• Advanced Energy Monitor

　　• Packet Trace Interface

　　• Virtual COM port

　　• SEGGER J-Link on-board debugger

　　• External device debugging

　　• Ethernet and USB connectivity

　　• Silicon Labs Si7021 relative humidity and temperature sensor

　　• Low power 128x128 pixel Memory LCDTFT

　　• User LEDs / pushbuttons

　　• 20-pin 2.54 mm EXP header

　　• Breakout pads for Wireless SoC I/O

　　• CR2032 coin cell battery support

　　SOFTWARE SUPPORT

　　• Simplicity Studio™

　　• Energy Profiler

　　• Network Analyzer

　　图5. EFR32xG22 2.4 GHz 6 dBm无线启动板(WSTK)外形图

　　The EFR32xG22 Wireless Gecko Wireless SoC is featured on a radio board that plugs directly into a Wireless Starter Kit (WSTK) Mainboard.

　　The mainboard features several tools for easy evaluation and development of wireless applications. An on-board J-Link debugger enables programming and debugging on the target device over USB or Ethernet. The Advanced Energy Monitor (AEM) offers realtime current and voltage monitoring. A virtual COM port interface (VCOM) provides an easy-to-use serial port connection over USB or Ethernet. The Packet Trace Interface (PTI) offers invaluable debug information about transmitted and received packets in wireless links.

　　All debug functionality, including AEM, VCOM, and PTI, can also be used towards external target hardware instead of the attached radio board.

　　To further enhance its usability, the mainboard contains sensors and peripherals that demonstrate some of the many capabilities of the EFR32xG22. A 20-pin expansion header (EXP header) is also provided that allows connection of expansion boards (EXP boards) to the kit.

　　Radio Boards

　　A Wireless Starter Kit consists of one or more mainboards and radio boards that plug into the mainboard. Different radio boards are available, each featuring different Silicon Labs devices with different operating frequency bands.

　　Since the mainboard is designed to work with all different radio boards, the actual pin mapping from a device pin to a mainboard feature is done on the radio board. This means that each radio board has its own pin mapping to the Wireless Starter Kit features, such as

　　buttons, LEDs, the display, the EXP header and the breakout pads. Because this pin mapping is different for every radio board, it is important that the correct document be consulted which shows the kit features in context of the radio board plugged in.

　　This document explains how to use the Wireless Starter Kit when the EFR32xG22 2.4 GHz 6 dBm Radio Board (BRD4182A) is combined with a Wireless STK Mainboard. The combination of these two boards is hereby referred to as a Wireless Starter Kit (Wireless

　　STK).

　　图6. EFR32xG22 2.4 GHz 6 dBm无线启动板(WSTK)硬件布局图

　　图7. EFR32xG22 2.4 GHz 6 dBm无线启动板(WSTK)框图

　　图8. 主板连接器布局图