WeAct BluePill+ GD32 V1.1 pinout

The GD32F103CBT6 version of WeAct’s BluePill+ V1.1 board with 20-position side headers and a separate SWD header.

WeAct BluePill+ GD32 V1.1

44 contacts Current package

WeAct Studio · GD32F103CBT6 · 128 KiB flash · 20 KiB SRAM · USB Type-C

WeAct BluePill+ GD32 V1.1 pinout

P1 side header

Pin order follows the WeAct schematic and PCB index.

P2 side header

Pin order follows the WeAct schematic and PCB index.

P3 SWD header

Pin 1 is 3.3 V. Pin 4 is ground.

Selected pin details

P3-3 · SWCLK

Input · Debug

Serial Wire clock on PA14.

WeAct Studio BluePill+ V1.1 schematic, 6 June 2022

Electrical limits · Link to this pin

All 44 pins

Pin	Signal	Direction	Function
P1-1	VCC Supply input	Supply input	Board regulator input. The USB supply reaches this rail through the input protection path.
P1-2	GND Return	Return	Connect to the board ground return.
P1-3	3V3 Regulated rail	Regulated rail	3.3 V board rail. Verify it before connecting the debugger reference.
P1-4	NRST Input	Input	Active-low reset with the onboard reset button.
P1-5	PB11 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-6	PB10 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-7	PB1 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-8	PB0 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-9	PA7 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-10	PA6 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-11	PA5 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-12	PA4 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-13	PA3 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-14	PA2 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-15	PA1 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-16	PA0 Bidirectional	Bidirectional	GPIO shared with the user button through a series resistor.
P1-17	PC15 Output	Output	Shared with the fitted 32.768 kHz oscillator circuit.
P1-18	PC14 Input	Input	Shared with the fitted 32.768 kHz oscillator circuit.
P1-19	PC13 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P1-20	VB Backup input	Backup input	RTC backup input through the schematic’s diode network.
P2-1	PB12 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-2	PB13 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-3	PB14 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-4	PB15 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-5	PA8 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-6	PA9 Bidirectional	Bidirectional	Default USART1 transmit assignment.
P2-7	PA10 Bidirectional	Bidirectional	Default USART1 receive assignment.
P2-8	PA11 Bidirectional	Bidirectional	GPIO shared with the USB D− line on this board.
P2-9	PA12 Bidirectional	Bidirectional	GPIO shared with the USB D+ line on this board.
P2-10	PA15 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-11	PB3 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-12	PB4 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-13	PB5 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-14	PB6 Bidirectional	Bidirectional	Default I²C1 clock assignment.
P2-15	PB7 Bidirectional	Bidirectional	Default I²C1 data assignment.
P2-16	PB8 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-17	PB9 Bidirectional	Bidirectional	Microcontroller pad exposed directly on the expansion header.
P2-18	VCC Supply input	Supply input	Board regulator input. The USB supply reaches this rail through the input protection path.
P2-19	GND Return	Return	Connect to the board ground return.
P2-20	3V3 Regulated rail	Regulated rail	3.3 V board rail. Verify it before connecting the debugger reference.
P3-1	3V3 Target reference	Target reference	Reference the probe to the board’s 3.3 V rail.
P3-2	SWDIO Bidirectional	Bidirectional	Serial Wire data on PA13.
P3-3	SWCLK Input	Input	Serial Wire clock on PA14.
P3-4	GND Return	Return	Connect to the board ground return.

Signal assignments

SWD debug

P3-2 connects to PA13 and P3-3 connects to PA14.

USART1

P2-6 is TX and P2-7 is RX with the default pin mapping.

I²C1

P2-14 is SCL and P2-15 is SDA with the default pin mapping.

Electrical limits

Parameter	Limit	Conditions and source
VCC regulator input3.3–5.5 V	3.3–5.5 V	Range printed on the board schematic. Use 5 V USB Type-C as the sole source in this guide. WeAct Studio BluePill+ V1.1 schematic, 6 June 2022
Digital signaling3.3 V nominal	3.3 V nominal	Use 3.3 V adapter and debug levels. WeAct Studio BluePill+ V1.1 schematic, 6 June 2022

Models and documents

Covers P1, P2 and P3 on the WeAct Studio V1.1 PCB populated with GD32F103CBT6. Match the WeAct board marking and the header pin-1 index before wiring.

WeAct BluePill+ GD32 V1.1: GD32F103CBT6 · 128 KiB flash · 20 KiB SRAM · USB Type-C

WeAct BluePill+ GD32 hardware repository· Board identity and fitted GD32F103CBT6.
WeAct BluePill+ V1.1 schematic· Expansion headers, SWD, clock, USB and power circuits.
Controller-board source register· Manufacturer documents, applicability and SHA-256 digests.