EFR32xG22 Explorer Kit (xG22-EK2710A)

Board Overview

EFR32xG22 Explorer Kit (xG22-EK2710A)

Name:

xg22_ek2710a

Vendor:

Silicon Laboratories

Architecture:

arm

SoC:

efr32mg22e224f512im40

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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:

• EFR32MG22 Website

• EFR32MG22E Datasheet

• EFR32xG22 Reference Manual

• BRD2710A User Guide

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	Silabs I2C node1 1	silabs,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
	on-chip	Silicon Labs Series 2 EUSART 1	silabs,eusart-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	debugserver	rtt	attach
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