STMicroelectronics Discovery kit for STM32 F030 Value line - with STM32F030R8 MCU STM32F0308-DISCO STM32F0308-DISCO Data Sheet

DocID025097 Rev 1

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:
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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. 

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5 V can also be used as input power supplies; for example, when the USB connector is 
not connected to the PC. 
In this case, the 32F0308DISCOVERY board must be powered by a power supply unit 
or by auxiliary equipment complying with standard EN-60950-1: 2006+A11/2009, and 
must be Safety Extra Low Voltage (SELV) with limited power capability.

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LD1 PWR: Red LED indicates that the board is powered.

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LD2 COM: Tricolor LED (COM) advises on the communication status as follows:
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Slow blinking Red LED/Off: At power on before USB initialization

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Fast blinking Red LED/Off: After the first correct communication between PC and 
STLINK/V2 (enumeration)

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Red LED On: When initialization between PC and ST-LINK/V2 is successfully 
finished

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Green LED On: After successful target communication initialization

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Blinking Red/Green LED: During communication with target

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Red LED On: Communication finished and OK

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Orange LED On: Communication failure

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User LD3: Green user LED connected to the I/O PC9 of the STM32F030R8T6.

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User LD4: Blue user LED connected to the I/O PC8 of the STM32F030R8T6.

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B1 USER: User push button connected to the I/O PA0 of the STM32F030R8T6.

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B2 RESET: Push button used to RESET the STM32F030R8T6.

Jumper JP2, labeled Idd, allows the consumption of STM32F030R8T6 to be measured by 
removing the jumper and connecting an ammeter.
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Jumper on: STM32F030R8T6 is powered (default).

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Jumper off: an ammeter must be connected to measure the STM32F030R8T6 current, 
(if there is no ammeter, the STM32F030R8T6 is not powered).