Power Supply And Power Selection; Leds; Push-Buttons - ST STM32F3DISCOVERY User Manual

Hardware layout and configuration
6.3

Power supply and power selection

The power supply is provided either by the host PC through the USB cable, or by an
external 5 V power supply.
The D1 and D2 diodes protect the 5 V and 3 V pins from external power supplies.
•
5 V and 3 V can be used as output power supplies when another application board is
connected to pins P1 and P2. In this case, the 5 V and 3 V pins deliver a 5 V or 3 V
power supply and power consumption must be lower than 100 mA.
•
5 V and 3 V can also be used as input power supplies, for example when the USB
connectors are not connected to the PC. In this case, the STM32F3DISCOVERY board
must be powered by a power supply unit or by auxiliary equipment complying with the
standard EN-60950-1: 2006+A11/2009, and must be Safety Extra Low Voltage (SELV)
with limited power capability.
Note: The board can be also powered through the USB USER connector and it is protected by D4
and D5 diodes when both USBs are connected (in which case, the 5 V power is around 4.4
volts).
6.4

LEDs

• LD1 PWR: Red LED indicates that the board is powered.
•
LD2 COM: LD2 default status is red. LD2 turns to green to indicate that
communications are in progress between the PC and the ST-LINK/V2.
•
User LD3: Red LED is a user LED connected to the I/O PE9 of the STM32F303VCT6.
•
User LD4: Blue LED is a user LED connected to the I/O PE8 of the STM32F303VCT6.
•
User LD5: Orange LED is a user LED connected to the I/O PE10 of the
STM32F303VCT6.
•
User LD6: Green LED is a user LED connected to the I/O PE15 of the
STM32F303VCT6.
•
User LD7: Green LED is a user LED connected to the I/O PE11 of the
STM32F303VCT6.
•
User LD8: Orange LED is a user LED connected to the I/O PE14 of the
STM32F303VCT6.
•
User LD9: Blue LED is a user LED connected to the I/O PE12 of the STM32F303VCT6.
•
User LD10: Red LED is a user LED connected to the I/O PE13 of the
STM32F303VCT6.
6.5

Push-buttons

•
B1 USER: user and wake-up button connected to the I/O PA0 of the STM32F303VCT6.
• B2 RESET: push-button connected to NRST is used to RESET the STM32F303VCT6.
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