SLWSTK6061A Datasheet, PDF (17/32 Pages) Silicon Laboratories – UG182: EFR32 Flex Gecko 2400/868 MHz Wireless Starter Kit

UG182: EFR32 Flex Gecko 2400/868 MHz Wireless Starter Kit
Peripherals
6.5 Virtual COM Port
An asynchronous serial connection to the board controller is provided for application data transfer between a host PC and the target
EFR32. This eliminates the need for an external serial port adapter.
PA0 (US0_TX#0)
PA1 (US0_RX#0)
PA2 (US0_CTS#30)
PA3 (US0_RTS#30)
PA5 (GPIO)
VCOM_TX
VCOM_RX
VCOM_CTS
VCOM_RTS
Isolation & Level Shift
VCOM_ENABLE
USB
or
Board
ETH
Controller
Host
PC
EFR32
Figure 6.5. Virtual COM Port Interface
The Virtual COM port consists of a physical UART between the target device and the board controller, and a logical function in the
board controller that makes the serial port available to the host PC over USB or Ethernet. The UART interface consists of four pins and
an enable signal.
Table 6.1. Virtual COM Port Interface Pins
Signal
Description
VCOM_TX
Transmit data from the EFR32 to the board controller
VCOM_RX
Receive data from the board controller to the EFR32
VCOM_CTS
Clear to Send hardware flow control input, asserted by the board controller when it is ready to receive more data
VCOM_RTS
Request to Send hardware flow control output, asserted by the EFR32 when it is ready to receive more data
VCOM_ENABLE Enables the VCOM interface, allowing data to pass through to the board controller.
The parameters of the serial port, such as baud rate or flow control, can be configured using the admin console. The default settings
depends on which radio board is used with the Wireless Starter Kit Mainboard. Please see 10. Device Connectivity for more details.
Note: The VCOM port is only available when the board controller is powered, which requires the J-Link USB cable to be inserted.
silabs.com | Smart. Connected. Energy-friendly.
Rev. 1.00 | 16