XIAO MG24

Board Overview

XIAO MG24

Name:

xiao_mg24

Vendor:

Seeed Technology Co., Ltd

Architecture:

arm

SoC:

efr32mg24b220f1536im48

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Overview

Seeed Studio XIAO MG24 is a mini development board based on Silicon Labs’ MG24. XIAO MG24 is based on ARM Cortex-M33 core, 32-bit RISC architecture with a maximum clock speed of 78MHz, supporting DSP instructions and FPU floating-point operations, possessing powerful computing power, and built-in AL/ML hardware accelerator MVP, which can efficiently process AI/machine learning algorithms. Secondly, it has excellent RF performance, with a transmission power of up to+19.5 dBm and a reception sensitivity as low as -105.4 dBm. It supports multiple IoT and wireless transmission protocols such as Matter, Thread, Zigbee, Bluetooth LE 5.3,Bluetooth mesh etc.

Hardware

• EFR32MG24B220F1536IM48 Mighty Gecko SoC

• CPU core: ARM Cortex®-M33 with FPU

• Flash memory: 1536 kB

• RAM: 256 kB

• Transmit power: up to +20 dBm

• Operation frequency: 2.4 GHz

• Crystals for LFXO (32.768 kHz) and HFXO (39 MHz).

• 3.7v LiPo power and charge support

• User and battery charge LEDs

For more information about the EFR32MG24 SoC and XIAO MG24 board, refer to these documents:

• EFR32MG24 Website

• EFR32MG24 Datasheet

• EFR32xG24 Reference Manual

• XIAO MG24 Wiki

Supported Features

The xiao_mg24 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.

xiao_mg24

/

efr32mg24b220f1536im48

xiao_mg24/efr32mg24b220f1536im48 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 HFRCOEM231	silabs,series2-hfrcoem23
	on-chip	Silicon Labs Series 2 LFRCO1	silabs,series2-lfrco
	on-chip	Generic fixed factor clock provider20	fixed-factor-clock
Comparator	on-chip	Silicon Labs Series 2 ACMP1	silabs,acmp
Cryptographic accelerator	on-chip	Silicon Labs Series 2 SE Mailbox1	silabs,gecko-semailbox
Debug	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 0-2 GPIO Peripheral1	silabs,gecko-gpio
	on-chip	Silicon Labs Series 0-2 GPIO Port4	silabs,gecko-gpio-port
	on-board	GPIO pins exposed on Seeeduino Xiao (and compatible devices) headers1	seeed,xiao-gpio
I2C	on-chip	Silicon Labs Series 0-2 I2C1	silabs,gecko-i2c
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
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
Regulator	on-chip	Silicon Labs Series 2 DC-DC converter1	silabs,series2-dcdc
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 EUSART 1	silabs,eusart-spi
SRAM	on-chip	Generic on-chip SRAM1	mmio-sram
Timer	on-chip	ARMv8-M System Tick1	arm,armv8m-systick
	on-chip	Silicon Labs Series 2 BURTC1	silabs,gecko-burtc
Watchdog	on-chip	Silicon Labs Series 1-2 WDOG1 1	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
PA7	GPIO	LED0
PA8	USART0_TX	UART Console TX
PA9	USART0_RX	UART Console RX

The default configuration can be found in boards/seeed/xiao_mg24/xiao_mg24_defconfig

System Clock

The EFR32MG24 SoC is configured to use the 39 MHz external oscillator on the board.

Serial Port

The EFR32MG24 SoC has one USART and two EUSARTs. USART0 is connected to the board controller and is used for the console.

Programming and Debugging

The XIAO MG24 contains an SAMD11 with CMSIS-DAP, allowing flashing, debugging, logging, etc. over the USB port. Doing so requires a version of OpenOCD that includes support for the flash on the MG24 MCU. Until those changes are included in stock OpenOCD, the version bundled with Arduino can be used, or can be installed from the OpenOCD Arduino Fork. When flashing, debugging, etc. you may need to include --openocd=/usr/local/bin/openocd --openocd-search=/usr/local/share/openocd/scripts/ options to the command.

Flashing

Connect the XIAO MG24 board to your host computer using the USB port. A USB CDC ACM serial port should appear on the host, that can be used to view logs from the flashed application.

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b xiao_mg24 samples/hello_world
west flash

Open a serial terminal (minicom, putty, etc.) connecting to the UCB CDC ACM serial port.

Reset the board and you should see the following message in the terminal:

Hello World! xiao_mg24