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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.

EFR32BG-SLTB010A

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:

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