Spark Logic

Black Pill connection guide

Black Pill STM32F103C8T6 Black Pill wiring guide with power, signal assignments, and bench checks.

STM32F103C8T6 Black Pill

43 contacts Current package
WeAct MiniF4 V3.1 44 contacts

STM32 development boards · This STM32F103 board uses a four-contact SWD connector with GND, CLK, DIO and 3V3 in that order. Its debug connector differs from the Blue Pill and WeAct MiniF4.

Power the board from USB

Required

Use a single USB cable to power the board through its native connector. Leave external power headers disconnected. Check the 3.3 V rail before attaching the debug probe.

Bench checks

  • Identify the USB power input and ground in the board schematic.
  • Measure roughly 3.3 V between the board logic rail and ground. Check for a short or wrong connector if the rail is low.

STM32F103C8T6 Black Pill connector map

Connection scenarios

Attach an SWD probe

Use the USB supply from the required step. Configure the probe for a powered 3.3 V target. Connect the probe’s reference input to the board logic rail, then wire SWDIO, SWCLK and ground.

Bench checks

  • Check pin 1 orientation and verify each connection with the cable unplugged.
  • Select the exact MCU and use a low SWD clock for the first connection.

STM32F103C8T6 Black Pill connector map

STM32F103C8T6 Black Pill wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

Header 1
Use the board connector marking and locate contact 1 before wiring.
Header 2
Use the board connector marking and locate contact 1 before wiring.
SWD header
Use the board connector marking and locate contact 1 before wiring.
USB connector
Use the board connector marking and locate contact 1 before wiring.
Selected pin details

H1-15 · B14

Configurable I/O · GPIO

Routes to MCU PB14. Choose the applicable GPIO or peripheral function in the MCU documentation.

STM32F103C8T6 Black Pill connector map

Electrical limits · Pin in the reference

Models and documents

The maps follow the listed PCB variants. Match the board markings and connector positions to the referenced schematic before applying power.

STM32F103C8T6 Black Pill
This STM32F103 board uses a four-contact SWD connector with GND, CLK, DIO and 3V3 in that order. Its debug connector differs from the Blue Pill and WeAct MiniF4.