Xnucleo User Manual
10
V2.6.1, Apr. 25
th
2015
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The PWR LED default color is red. It indicates the power supply status of the STM32 Xnucleo
board. The red LED indicates that the MCU part is powered by +5V.
2.2.3
SERIAL PORT WORKING STA TUS L ED INDICATORS
TX indicator is in green, and RX indicator in blue. The blinking TX indicator means the MCU of
STM32 Xnucleo board is sending message to the targeted PC. The blinking RX indicator means
the MCU of STM32 Xnucleo board is receiving message from the targeted PC.
2.3
PUSH BUTTON
2.3.1
USER BUTTON
The USER button is connected to the I/O PC13(pin 2) of the targeted MCU by setting JP6 to ON;
2.3.2
RESET BUTTON
This RESET button is connected to NRST, and is used to reset the targeted MCU.
2.4
JP6(IDD) JUMPER SETTINGS
2.4.1
JP6 ON
STM32 microcontroller is powered (default).
2.4.2
JP6 OFF
When this jumper is removed, STM32 microcontroller is not powered. But you can connect an
ammeter on the JP6 to measure the STM32 microcontroller current.
2.5
USART COMMUNICATION
The USART2 interface available on PA2 and PA3 of the STM32 microcontroller can be connected
to Virtual COM Port, STMicroelectronics Morpho connector or to Arduino connector.
2.5.1
CONNECTING THE TARG ETED MCU TO SERIAL PO RT
Please set the JP4 as follows, to connect the targeted MCU to serial port (For more information,
