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  • STM32F051C8T6 - F0 Blue Pill

    F0 Blue Pill


    Board Name (F0) Blue Pill
    Brand Unknown
    Origin AliExpress, China
    Microcontroller Part STM32F051C8T6
    Package LQFP48
    Core Cortex-M0
    FLASH 16KB
    SRAM 8KB
    Max. Clock Speed 48MHz
    Crystals HSE (High Speed External) 8MHz
    LSE (Low Speed External) 32.768kHz
    Power Sources Any +3.3V pin (+3.3V)
    Any +5V pin (+5V)
    USB connector (+5V)
    Regulator manufacturer Torex Semiconductior
    Regulator part number XC6204 (4A2D)
    Regulator package SOT753
    Output +3.3V @ 150mA
    Battery holder No
    Connectivity Headers 2x 1x20 male dupont (2.54mm)
    Specific None
    Debug SWD (1x4 male dupont (2.54mm))
    USB Micro (+5V power only)
    I/O LEDs Power LED (PWR, +3.3V)
    User LED (PC13, PC13, sink)
    Buttons, switches and jumpers Reset button (REST, NRST, active low)
    1-way jumper (BOOT0, BOOT0, active low)
    Other devices None
    PCB Colour Blue
    Size 53mm x 23mm
    Mounting Breadboard
    • Note: Because the STM32F051C8T6 does not support USB, only the power pins on the USB connector are connected.
    • Warning: The +5V pins on this board are directly connected to the +5V pin of the USB connector. There is no protection in place. Do not power this board through USB and an external power supply at the same time.
    • Trivia: This board is very similar to the "original" Blue Pill board. It has the same dimensions and looks very similar. However, instead of an STM32F103C8T6 this board features an STM32F051C8T6 microcontroller.


    F0 Blue Pill

    F0 Blue Pill Top view

    F0 Blue Pill Bottom view

    Header 1

    Pin Connected to
    G Ground plane
    G Ground plane
    3.3 +3.3V rail
    B2 PB2
    B11 PB11
    B10 PB10
    B1 PB1
    B0 PB0
    A7 PA7
    A6 PA6
    A5 PA5
    A4 PA4
    A3 PA3
    A2 PA2
    A1 PA1
    A0 PA0
    C15 PC15
    C14 PC14
    C13 PC13

    Header 2

    Pin Connected to
    3.3 +3.3V rail
    G Ground plane
    5V +5V rail
    B9 PB9
    B8 PB8
    B7 PB7
    B6 PB6
    B5 PB5
    B4 PB4
    B3 PB3
    A15 PA15
    A12 PA12
    A11 PA11
    A10 PA10
    A9 PA9
    A8 PA8
    B15 PB15
    B14 PB14
    B13 PB13
    B12 PB12


    Pin Connected to
    VCC +5V rail
    D- N.C.
    D+ N.C.
    ID N.C.
    GND Ground plane


    Pin Connected to
    GND Ground plane
    CLK PA14
    DIO PA13
    3.3 +3.3V rail