Connectors; J-Link Usb Connector; Ethernet Connector - Silicon Laboratories EFR32xG21B User Manual

3. Connectors

This chapter gives you an overview of the Wireless STK Mainboard connectivity. The placement of the connectors are shown in the
figure below.
Ethernet
Connector
J-Link USB
Connector

3.1 J-Link USB Connector

The J-Link USB connector is situated on the left side of the Wireless Starter Kit Mainboard. Most of the kit's development features are
supported through this USB interface when connected to a host computer, including:
• Debugging and programming of the target device using the on-board J-Link debugger
• Communication with the target device over the virtual COM port using USB-CDC
• Accurate current profiling using the AEM
In addition to providing access to development features of the kit, this USB connector is also the main power source for the kit. USB 5V
from this connector powers the board controller and the AEM. It is recommended that the USB host be able to supply at least 500 mA
to this connector, although the actual current required will vary depending on the application.

3.2 Ethernet Connector

The Ethernet connector provides access to all of the Wireless Starter Kit's development features over TCP/IP. The Ethernet interface
provides some additional development features to the user. Supported features include:
• Debugging and programming of the target device using the on-board J-Link debugger
• Communication with the target device over the virtual COM port using TCP/IP socket 4901
• "VUART" communication with the target device over the debug SWD/SWO interface using TCP/IP socket 4900
• Accurate current profiling using the AEM
• Real-time radio packet and network analysis using the Packet Trace Interface
• Access to advanced configuration options using the admin console over TCP/IP socket 4902
Note: The Wireless Starter Kit cannot be powered using the Ethernet connector, so in order to use this interface, the USB connector
must be used to provide power to the board.
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UG428: EFR32xG21B 2.4 GHz 10 dBm Wireless Starter Kit User's Guide
Simplicity
Connector
Figure 3.1. Mainboard Connector Layout
Debug
Connector
Connectors
Rev. 1.0 | 7