STM32F103C8T6 - Blue Pill

Blue Pill Variations

Overview

Board Name Blue Pill
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 Shanghai TX Electronics Sci-Tech Co., Ltd
Regulator part number TX6211B (DE=A1D)
Regulator package SOT353
Output +3.3V @ 300mA
Battery holder No
Connectivity Headers 2x 1x20 male dupont (2.54mm)
Specific None
Debug SWD (1x4 male dupont (2.54mm))
USB Micro
I/O LEDs Power LED (PWR, +3.3V)
User LED (PC13, PC13, sink)
Buttons, switches and jumpers Reset button (RESET, NRST, active low)
2-way jumper (BOOT0)
2-way jumper (BOOT1)
Other devices None
PCB Colour Blue
Size 53mm x 23mm
Mounting Breadboard
Remarks
  • 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.
  • Warning: This board may have a wrong value of resistor on the USB D+ pin. Instead of a 1.5kΩ it has either a 10kΩ or 4.7kΩ resistor. This can be solved by replacing the resistor with the right value.
  • Trivia: This board might be one of the most populair Chinese STM32 development boards currently available. This board is based on the Maple Mini.
  • Trivia: This board got its name from a forum post at the STM32duino forums and is a reference to the movie The Matrix.
  • Trivia: This board is also available with an STM32F051C8T6 microcontroller, although slightly different.

Resources

Pictures

Blue Pill

Blue Pill Top view

Blue Pill Bottom view

Header 1

Pin Connected to
G Ground plane
G Ground plane
3.3 +3.3V rail
R NRST
B11 PB11
B10 PB10
B1 PB1
B0 PB0
A7 PA7
A6 PA6
A5 PA5
A4 PA4
A3 PA3
A2 PA2
A1 PA1
A0 PA0
C15 PC15
C14 PC14
C13 PC13
VB VBAT

Header 2

Pin Connected to
3.3 +3.3 rail
G Ground plane
5V +5V rail
B9 PB9
B8 PB8
B7 PB7
B6 PB6
B5 PB5
B4 PB4
B3 PB3
A15 PA15
A12 PA12
A11 PA11
A10 PA10
A9 PA9
A8 PA8
B15 PB15
B14 PB14
B13 PB13
B12 PB12

USB

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

SWD

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