EFR32 Thunderboard-style boards

Overview

There are a couple of very similar boards, which we categorize as “Thunderboard-style boards”. The name can be seen on some of Silicon Labs products that use boards of this style, such as EFR32™ Blue Gecko Starter Kit, a.k.a Thunderboard EFR32BG22.

Those boards contains an MCU from the EFR32BG family built on ARM® Cortex®-M33F processor with low power capabilities.

For an example of such board, refer to the following site:

• Thunderboard EFR32BG22 Website

Currently the following devices are considered “Thunderboard-style”:

• SiLabs EFR32BG22-BRD4184(A/B) (Thunderboard EFR32BG22)
• SiLabs EFR32BG27-BRD2602(A) (EFR32BG27 +8 dBm Dev Kit Board)

Serial Port

The SoCs used on these boards have 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 Thunderboard boards include J-Link serial and debug adapters built into the board. The adapter provides:

• A USB connection to a host computer running J-Link software or Silicon Labs Simplicity Commander.

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

For detailed instructions regarding flashing, refer to documentation of a specific device.