CANADUINO STM32 Blue Pill V3.0 STM32F103C6T6 72MHz – 32kB Flash


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The “Blue Pill” STM32 development modules have been incredibly popular in the last few years but almost disappeared from the market due to a chip shortage. Some smart Chinese manufacturers got the idea to re-brand chips from other manufacturers as STM32 which caused a lot of frustration within the maker community. This was the reason why we discontinued selling STM32F103 modules in 2020.

It is still risky to buy STM32F103C8T6 modules due to a large number of different counterfeits on the market.

This module here comes with the C6T6 version, with smaller memory (32kB instead of 64kB), only 2 (instead of 3) serial ports, and only 3 (instead of 4) timers, compared to the C8T6.

The good news is, that we are highly confident the chips are original STM32 chips, instead of re-branded clones.

To get started with the STM32 and Arduino IDE, please read Renzo Mischianti’s amazing how-to guide.


STM32F103C6T6 Specifications:

  • ARM 32-bit Cortex™-M3 CPU Core
    • 72 MHz maximum frequency,1.25 DMIPS/MHz (Dhrystone 2.1) performance at 0 wait state memory access
    • Single-cycle multiplication and hardware division
  • Memories
    • 32 Kbytes of Flash memory
    • 10 Kbytes of SRAM
  • Clock, reset and supply management
    • 2.0 to 3.6 V application supply and I/Os
    • POR, PDR, and programmable voltage detector (PVD)
    • 4-to-16 MHz crystal oscillator
    • Internal 8 MHz factory-trimmed RC
    • Internal 40 kHz RC
    • PLL for CPU clock
    • 32 kHz oscillator for RTC with calibration
  • Low power
    • Sleep, Stop and Standby modes
    • VBAT supply for RTC and backup registers
  • 2 x 12-bit, 1 μs A/D converters (up to 16 channels)
    • Conversion range: 0 to 3.6 V
    • Dual-sample and hold capability
    • Temperature sensor
  • DMA
    • 7-channel DMA controller
    • Peripherals supported: timers, ADC, SPIs, I2Cs and USARTs
  • Up to 51 fast I/O ports
    • 26/37/51 I/Os, all mappable on 16 external interrupt vectors and almost all 5 V-tolerant
  • Debug mode
    • Serial wire debug (SWD) & JTAG interfaces
  • 6 timers
    • Two 16-bit timers, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input
    • 16-bit, motor control PWM timer with dead-time generation and emergency stop
    • 2 watchdog timers (Independent and Window)
    • SysTick timer 24-bit down-counter
  • 6 communication interfaces
    • 1 x I2C interface (SMBus/PMBus)
    • 2 × USARTs (ISO 7816 interface, LIN, IrDA capability, modem control)
    • 1 × SPI (18 Mbit/s)
    • CAN interface (2.0B Active)
    • USB 2.0 full-speed interface
  • CRC calculation unit, 96-bit unique ID

Note: Headers included but not assembled.

Recommended accessories:
ST-Link V2 programmer/debugger
STM32 screw-terminal adapter with battery backup for the RTC


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