Reset Sources; Virtual Com Port (Vcp); Leds; Table 8. Vcp Communication - ST STM32U083C-DK User Manual

6.6

Reset sources

The Discovery kit reset signal is active LOW and the reset sources include:
• The reset push‑button (B1)
• The embedded STLINK-V2EC
• The ARDUINO
• The extension connector (CN7 pin 16)
6.7

Virtual COM port (VCP)

An STM32 serial interface is connected to the STLINK-V2EC debug interface. The user can choose the USART2
interface. Refer to
Pin name
PA2
PA3
6.8

LEDs

Six LEDs are available on the STM32U083C-DK Discovery kit. The six LEDs are located on the top side of the
board:
STLINK-V2EC tricolor LED (LD1)
The tricolor (green, orange, and red) LED provides information about STLINK-V2EC communication status (LD1).
For detailed information about the LED, refer to the technical note Overview of ST-LINK derivatives (TN1235).
VBUS_STLK over current LED (LD2)
The red LED is ON when overcurrent is detected on USB V
500 mA is requested on V
charger mode.
5V PWR LED (LD6)
The green LED (LD6) indicates that the Discovery kit is powered by a 5 V source, and this source is available on
CN6 pin 5 and CN7 pin 20.
User green LED (LD3), blue LED (LD4), and red LED (LD5)
The user green LED (LD3) is connected to the STM32 I/O PC13.
The user blue LED (LD4) is connected to the STM32 I/O PA5 (R66 ON, default configuration), also used for
®
ARDUINO D13 function.
The user red LED (LD5) is connected to the STM32 I/O PB2.
A transistor is used to drive the LED whatever the MCU 1V8 or 3V3 voltage range.
UM3292 - Rev 1
®
connector (CN6 pin 3)
Table 8 below to set the USART2 connection to the VCP interface.
Table 8.
Function
USART2 TX
USART2 RX
. In this case, it is recommended to supply the board with E5V, VIN, or in the USB
BUS
VCP communication
Virtual COM port
(default configuration
U21 ON
R33 ON
. The LED gives the information that more than
BUS
UM3292
Hardware layout and configuration
Expansion connectors
connection
U21 and R25 OFF
R33 OFF
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