EZR32WG-490MHZ Datasheet, PDF (15/29 Pages) Silicon Laboratories – Advanced Energy Monitoring

EZR32WG 490MHz Wireless Starter Kit
Board Controller
7. Board Controller
The kit contains a board controller that is responsible for performing various board-level tasks, such as handling the debugger and the
Advanced Energy Monitor. An interface is provided between the EZR32 and the board controller in the form of a UART connection. The
connection is enabled by setting the VCOM_ENABLE (PA12) line high, and using the lines VCOM_TX (PB3) and VCOM_RX (PB4) for
communication.
Specific library functions have been provided in the kit Board Support Package that support various requests to be made to the board
controller, such as quering AEM voltage or current. To use these functions, the Board Support Package must be installed. See the to
find out more.
Note:
The board controller is only available when USB power is connected.
7.1 VCOM
When enabling virtual serial communication (VCOM), the board controller makes communication possible on the following interfaces:
• Virtual USB COM port using a CDC driver, provided that the kit is connected to a host computer.
• TCP/IP, by connecting to the Wireless Starter Kit on port 4901 using a telnet client.
• Expansion header when enabled by the board controller.
The VCOM functionality can operate in two different modes:
• Transparent mode allows the target to communicate using a regular serial driver. The board controller forwards the raw byte stream
to its interfaces.
• BSP-mode is initiated by a BSP call in the target application. This mode enables the target to use all BSP functionality, while having
access to VCOM over USB and Ethernet.
silabs.com | Smart. Connected. Energy-friendly.
Rev. 1.2 | 12