EFR32 BRD4187C (xG24-RB4187C)

Overview

The EFR32MG24 Mighty Gecko Radio Board is one of the two radio boards delivered with xG24-PK6010A Website. It contains a Wireless System-On-Chip from the EFR32MG24 family built on an ARM Cortex®-M33F processor with excellent low power capabilities.

xG24-RB4187C (image courtesy of Silicon Labs)

The BRD4187C a.k.a. xG24-RB4187C radio board plugs into the Wireless Pro Kit Mainboard BRD4002A and is supported as one of EFR32 Radio Boards.

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).

For more information about the EFR32MG24 SoC and BRD4187C board, refer to these documents:

• EFR32MG24 Website

• EFR32MG24 Datasheet

• EFR32xG24 Reference Manual

• xG24-PK6010A Website

• BRD4187C User Guide

Supported Features

The board configuration supports the following hardware features:

Interface	Controller	Driver/Component
MPU	on-chip	memory protection unit
NVIC	on-chip	nested vector interrupt controller
SYSTICK	on-chip	systick
COUNTER	on-chip	stimer
FLASH	on-chip	flash memory
GPIO	on-chip	gpio
UART	on-chip	serial
I2C	on-chip	i2c
TRNG	on-chip	semailbox
WATCHDOG	on-chip	watchdog

Other hardware features are currently not supported by the port.

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
PB2	GPIO	LED0
PB4	GPIO	LED1
PB1	GPIO	Push Button 0
PB3	GPIO	Push Button 1
PB0	GPIO	Board Controller Enable VCOM_ENABLE
PA8	USART0_TX	UART Console VCOM_TX US0_TX
PA9	USART0_RX	UART Console VCOM_RX US0_RX

The default configuration can be found in boards/silabs/efr32_radio/efr32_radio_efr32mg24b220f1536im48_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

Please refer to Programming and Debugging EFR32 Radio Board for details on the supported debug interfaces.

Flashing

Connect the BRD4002A board with a mounted BRD4187C radio module to your host computer using the USB port.

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b efr32_radio/efr32mg24b220f1536im48 samples/hello_world
west flash

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 should see the following message in the terminal:

Hello World! efr32_radio