EFR32BG-SLTB010A

Overview

The EFR32™ Blue Gecko Starter Kit EFR32BG-SLTB010A (a.k.a Thunderboard EFR32BG22) contains a MCU from the EFR32BG family built on ARM® Cortex®-M33F processor with low power capabilities.

Hardware

• EFR32BG22 Blue Gecko Wireless SoC with upto 76.8 MHz operating frequency

• ARM® Cortex® M33 core with 32 kB RAM and 512 kB Flash

• Macronix ultra low power 8-Mbit SPI flash (MX25R8035F)

• 2.4 GHz ceramic antenna for wireless transmission

• Silicon Labs Si7021 relative humidity and temperature sensor

• Silicon Labs Si1133 UV index and ambient light sensor

• Silicon Labs Si7210 hall effect sensor

• TDK InvenSense ICM-20648 6-axis inertial sensor

• One LED and one push button

• Power enable signals and isolation switches for ultra low power operation

• On-board SEGGER J-Link debugger for easy programming and debugging, which includes a USB virtual COM port and Packet Trace Interface (PTI)

• Mini Simplicity connector for access to energy profiling and advanced wireless network debugging

• Breakout pads for GPIO access and connection to external hardware

• Reset button

• Automatic switch-over between USB and battery power

• CR2032 coin cell holder and external battery connector

For more information about the EFR32BG SoC and Thunderboard EFR32BG22 (EFR32BG-SLTB010A) board:

• EFR32BG22 Website

• EFR32BG22 Datasheet

• EFR32xG22 Reference Manual

• EFR32BG22-SLTB010A Website

• EFR32BG22-SLTB010A User Guide

• EFR32BG22-SLTB010A Schematics

Supported Features

The efr32bg_sltb010a 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
SPI(M/S)	on-chip	spi
FLASH	on-chip	flash memory
GPIO	on-chip	gpio
UART	on-chip	serial
WATCHDOG	on-chip	watchdog
TRNG	on-chip	true random number generator
I2C(M/S)	on-chip	i2c

The default configuration can be found in the defconfig file: boards/arm/efr32bg_sltb010a/efr32bg_sltb010a_defconfig.

Other hardware features are currently not supported by the port.

Connections and IOs

The EFR32BG SoC has six gpio controllers (PORTA, PORTB, PORTC, PORTD, PORTE and PORTF).

In the following table, the column Name contains Pin names. For example, PE2 means Pin number 2 on PORTE and #27 represents the location bitfield , as used in the board’s and microcontroller’s datasheets and manuals.

Name	Function	Usage
PB0	GPIO	LED0 (RED)
PB1	GPIO	SW0 Push Button PB0
PA5	UART_TX	UART TX Console VCOM_TX US1_TX #1
PA6	UART_RX	UART RX Console VCOM_RX US1_RX #1

System Clock

The EFR32BG SoC is configured to use the 38.4 MHz external oscillator on the board.

Serial Port

The EFR32BG22 SoC has two USARTs. USART1 is connected to the board controller and is used for the console.

Programming and Debugging

Note

Before using the kit the first time, you should update the J-Link firmware from J-Link-Downloads

Flashing

The EFR32BG-SLTB010A includes an J-Link serial and debug adaptor built into the board. The adaptor provides:

• A USB connection to the host computer, which exposes a Mass Storage and a USB Serial Port.

• A Serial Flash device, which implements the USB flash disk file storage.

• A physical UART connection which is relayed over interface USB Serial port.

Flashing an application to EFR32BG-SLTB010A

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 efr32bg_sltb010a samples/hello_world

Connect the EFR32BG-SLTB010A 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 should be able to see on the corresponding Serial Port the following message:

Hello World! efr32bg_sltb010a