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  • STM32F103C8T6 - Maple Mini Clone

    Maple Mini Clone


    Board Name Maple Mini Clone
    Brand Unknown
    Origin AliExpress, China
    Microcontroller Part STM32F103C8T6
    Package LQFP48
    Core Cortex-M3
    FLASH 64KB
    SRAM 20KB
    Max. Clock Speed 72MHz
    Crystals HSE (High Speed External) 8MHz
    LSE (Low Speed External) None
    Power Sources Any +3.3V pin (+3.3V)
    USB connector (+5V)
    Vin pin (+15V max.)
    Regulator manufacturer Advanced Monolithic Systems Inc.
    Regulator part number AMS1117
    Regulator package SOT223
    Output +3.3V @ 1000mA
    Battery holder No
    Connectivity Headers 2x 1x20 male dupont (2.54mm)
    Specific None
    Debug None
    USB Mini
    I/O LEDs User LED (d1=33, PB1, source)
    Buttons, switches and jumpers Reset button (reset, NRST, active low)
    User button (but=32, PB8 and BOOT0, active high)
    Other devices None
    PCB Colour Blue
    Size 51mm x 18mm
    Mounting Breadboard
    • Note: The user button is also connected the the BOOT0 pin. This means that this button should be pressed when flashing the microcontroller.
    • Trivia: This board is a clone of the official Maple Mini originally made by Leaflabs. The originial Maple Mini was designed to be used with the standard Arduino IDE. The official Maple products are no longer supported. The software has since been forked and is maintained under the STM32duino flag, supporting more boards than the original Maple project.


    Maple Mini Clone

    Maple Mini Clone Top view

    Maple Mini Clone Bottom view

    Header 1

    Pin Connected to
    Vcc +3.3V rail
    GND Ground plane
    Vbat VBAT
    14 PC13
    13 PC14
    12 PC15
    reset NRST
    11 PA0
    10 PA1
    9 PA2
    8 PA3
    7 PA4
    6 PA5
    5 PA6
    4 PA7
    3 PB0
    2 PB2
    1 PB10
    0 PB11
    Vin Regulator in

    Header 2

    Pin Connected to
    31 PB12
    30 PB13
    29 PB14
    28 PB15
    27 PA8
    26 PA9
    25 PA10
    24 PA11
    23 PA12
    22 PA13
    21 PA14
    20 PA15
    19 PB3
    18 PB4
    17 PB5
    16 PB6
    15 PB7
    but PB8
    GND Ground plane
    Vcc +3.3V rail


    Pin Connected to
    VCC Regulator in
    D- PA11
    D+ PA12
    ID N.C.
    GND Ground plane