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

Connect a 3.3 V UART console

Use an external 3.3 V logic-level adapter and keep the board on USB power. Cross transmit and receive, share ground and match the serial framing.

Bench checks

  • Leave the adapter’s supply output disconnected.
  • Enable USART1 on PA9/PA10 and verify that the host receives a known test string.

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

H1-1 · GND

Return · Ground

Connects to the board’s ground plane.

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.