• STM32-base
  • Home
  • Overview
  • Roadmap and scope
  • About this project
  • Guides
  • Getting started with STM32
  • Setting up STM32-base
  • Flashing
  • Boards
  • Boards overview
  • Blue pill (STM32F103C8T6)
  • Black pill (STM32F103C8T6)
  • Cheatsheets
  • Linker: Memory regions
  • Device name mapping
  • Makefile options
  • External
  • STM32-base project
  • STMicroelectronics
  • STM32F103C8T6 - Blue Header

    Blue Header


    Board Name Blue Header
    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) 32.768kHz
    Power Sources Any +3.3V pin (+3.3V)
    Any +5V pin (+5V)
    USB connector (+5V)
    Regulator manufacturer Advanced Monolithic Systems Inc.
    Regulator part number AMS1117
    Regulator package SOT223
    Output +3.3V @ 1000mA
    Battery holder No
    Connectivity Headers 2x 1x14 male dupont (2.54mm)
    1x 1x8 male dupont (2.54mm)
    Specific Serial (1x4 male dupont (2.54mm))
    Power (2x3 male dupont (2.54mm))
    Debug SWD (1x4 male dupont (2.54mm))
    JTAG (20-pin IDC)
    USB Mini
    I/O LEDs Power LED (POW, +3.3V)
    User LED (LED, PB8, sink)
    Buttons, switches and jumpers Reset button (RST, NRST, active low)
    1-way jumper (J6, BOOT0, active low)
    Other devices None
    PCB Colour Blue
    Size 60mm x 34mm
    Mounting None
    • 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.


    Blue Header

    Blue Header Top view

    Blue Header Bottom view

    Header 1

    Pin Connected to
    PA1 PA1
    PA0 PA0
    PC15 PC15
    PC14 PC14
    PC13 PC13
    PB7 PB7
    PB6 PB6
    PB5 PB5
    PB4 PB4
    PB3 PB3
    PB2 PB2
    PB1 PB1
    PB0 PB0

    Header 2

    Pin Connected to
    PA15 PA15
    PA14 PA14
    PA13 PA13
    PA12 PA12
    PA11 PA11
    PA10 PA10
    PA9 PA9
    PA8 PA8

    Header 3

    The lower main header as seen on the top view. Pins are listed in a clock-wise order.

    Pin Connected to
    PB15 PB15
    PB14 PB14
    PB13 PB13
    PB12 PB12
    PB11 PB11
    PB10 PB10
    PB9 PB9
    PB8 PB8
    PA7 PA7
    PA6 PA6
    PA5 PA5
    PA4 PA4
    PA3 PA3
    PA2 PA2


    Pin Connected to
    VCC +5V rail
    D- PA11
    D+ PA12
    ID N.C.
    GND Ground plane


    Pin Connected to
    3V3 +3.3V rail
    DIO PA13
    CLK PA14
    GND Ground plane


    Pin Connected to JTAG SWD
    1 +3.3V rail VCC -
    2 +3.3V rail VCC -
    3 PB4 TRST -
    4 Ground plane GND -
    5 PA15 TDI -
    6 Ground plane GND -
    7 PA13 TMS SWDIO
    8 Ground plane GND -
    10 Ground plane GND -
    11 N.C. RTCK -
    12 Ground plane GND -
    13 PB3 TDO SWO
    14 Ground plane GND -
    15 NRST RESET -
    16 Ground plane GND -
    17 N.C. N.C. -
    18 Ground plane GND -
    19 +5V rail N.C. -
    20 Ground plane GND -


    Pin Connected to
    +5V +5V rail
    GND Ground plane
    RXD PA10
    TXD PA9


    Pin Connected to
    5V +5V rail
    5V +5V rail
    GND Ground plane
    GND Ground plane
    3V3 +3.3V rail
    3V3 +3.3V rail