EFR32xG22 Explorer Kit (xG22-EK2710A)

Overview

The EFR32xG22E Explorer Kit (xG22-EK2710A) contains a Wireless System-On-Chip from the EFR32MG22 family built on an ARM Cortex®-M33 processor with excellent low power capabilities.

Hardware

  • EFR32MG22E224F512IM40 Mighty Gecko SoC

  • CPU core: ARM Cortex®-M33 with FPU

  • Flash memory: 512 kB

  • RAM: 32 kB

  • Transmit power: up to +6 dBm

  • Operation frequency: 2.4 GHz

  • Crystal for HFXO (38.4 MHz)

For more information about the EFR32MG22 SoC and BRD2710A board, refer to these documents:

Supported Features

The xg22_ek2710a board supports the hardware features listed below.

on-chip / on-board
Feature integrated in the SoC / present on the board.
2 / 2
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

xg22_ek2710a/efr32mg22e224f512im40 target

Type

Location

Description

Compatible

CPU

on-chip

ARM Cortex-M33 CPU1

arm,cortex-m33

ADC

on-chip

Silicon Labs Series 2 IADC1

silabs,gecko-iadc

Bluetooth

on-chip

Silicon Labs Series 2 Bluetooth HCI1

silabs,bt-hci-efr32

Clock control

on-chip

Silicon Labs Series 2 CMU1

silabs,series-clock

on-chip

Generic fixed-rate clock provider3

fixed-clock

on-chip

Silicon Labs Series 2 HFXO1

silabs,hfxo

on-chip

Silicon Labs Series 2 LFXO1

silabs,series2-lfxo

on-chip

Silicon Labs Series 2 HFRCODPLL1

silabs,series2-hfrcodpll

on-chip

Silicon Labs Series 2 LFRCO1

silabs,series2-lfrco

on-chip

Generic fixed factor clock provider15

fixed-factor-clock

Debug

on-chip

Silicon Labs Packet Trace Interface1

silabs,pti

on-chip

ARMv8 instrumentation trace macrocell1

arm,armv8m-itm

DMA

on-chip

Silicon Labs Series 2 LDMA1

silabs,ldma

Flash controller

on-chip

Silicon Labs Series 2 MSC1

silabs,series2-flash-controller

GPIO & Headers

on-chip

Silicon Labs Series 2 GPIO Peripheral1

silabs,gpio

on-chip

Silicon Labs Series 2 GPIO Port4

silabs,gpio-port

I2C

on-chip

Silicon Labs Series 0-2 I2C1 1

silabs,gecko-i2c

Input

on-board

Group of GPIO-bound input keys1

gpio-keys

Interrupt controller

on-chip

ARMv8-M NVIC (Nested Vectored Interrupt Controller)1

arm,v8m-nvic

LED

on-board

Group of GPIO-controlled LEDs1

gpio-leds

on-board

Group of PWM-controlled LEDs1

pwm-leds

MTD

on-chip

Flash node1

soc-nv-flash

on-board

Fixed partitions of a flash (or other non-volatile storage) memory1

fixed-partitions

Networking

on-chip

Silicon Labs Series 2 Radio Interface1

silabs,series2-radio

Pin control

on-chip

Silicon Labs Series 2 DBUS Pin Controller1

silabs,dbus-pinctrl

PWM

on-chip

Silicon Labs TIMER PWM1 4

silabs,timer-pwm

on-chip

Silicon Labs LETIMER PWM1

silabs,letimer-pwm

Regulator

on-chip

Silicon Labs Series 2 DC-DC converter1

silabs,series2-dcdc

RNG

on-chip

GECKO TRNG (True Random Number Generator)1

silabs,gecko-trng

RTC

on-chip

Silicon Labs Series 2 Sleeptimer1

silabs,gecko-stimer

Serial controller

on-chip

Silicon Labs Series 2 USART1

silabs,usart-uart

SPI

on-chip

Silicon Labs Series 2 USART1

silabs,usart-spi

SRAM

on-chip

Generic on-chip SRAM1

mmio-sram

Timer

on-chip

ARMv8-M System Tick1

arm,armv8m-systick

on-chip

Silicon Labs TIMER1 4

silabs,series2-timer

on-chip

Silicon Labs Series 2 BURTC1

silabs,gecko-burtc

on-chip

Silicon Labs LETIMER1

silabs,series2-letimer

Watchdog

on-chip

Silicon Labs Series 1-2 WDOG1

silabs,gecko-wdog

Connections and IOs

In the following table, the column Name contains Pin names. For example, PA2 means Pin number 2 on PORTA, as used in the board’s datasheets and manuals.

Name

Function

Usage

PA4

GPIO

LED0

PC7

GPIO

Push Button 0

PA5

USART1_TX

UART Console VCOM_TX US0_TX

PA6

USART1_RX

UART Console VCOM_RX US0_RX

The default configuration can be found in boards/silabs/dev_kits/xg22_ek2710a/xg22_ek2710a_defconfig

System Clock

The EFR32MG22E SoC is configured to use the 38.4 MHz external oscillator on the board, and can operate a clock speeds of up to 76.8 MHz.

Serial Port

The EFR32MG22E SoC has two USARTs and one EUART. USART1 is connected to the board controller and is used for the console.

Programming and Debugging

The xg22_ek2710a board supports the runners and associated west commands listed below.

flash debug rtt attach debugserver
jlink ✅ (default) ✅ (default)
silabs_commander

Note

Before using the kit the first time, you should update the J-Link firmware in Simplicity Studio.

Flashing

The sample application Hello World is used for this example. Build the Zephyr kernel and application:

# From the root of the zephyr repository
west build -b xg22_ek2710a samples/hello_world

Connect the xg22_ek2710a to your host computer using the USB port and you should see a USB connection.

Open a serial terminal (minicom, putty, etc.) with the following settings:

  • Speed: 115200

  • Data: 8 bits

  • Parity: None

  • Stop bits: 1

Reset the board and you’ll see the following message on the corresponding serial port terminal session:

Hello World! xg22_ek2710a/efr32mg22e224f512im40

Bluetooth

To use the BLE function, run the command below to retrieve necessary binary blobs from the SiLabs HAL repository.

west blobs fetch hal_silabs

Then build the Zephyr kernel and a Bluetooth sample with the following command. The Observer sample application is used in this example.

# From the root of the zephyr repository
west build -b xg22_ek2710a samples/bluetooth/observer