STM32F103C8T6 Blue Pill: high resolution pinout and specs

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STM32F103 pinout low resolution
STM32F103 pinout low resolution

Link to the high resolution pinout image

Here the most used STM32 boards STM32F103C8T6 STM32F401 STM32F411 ST-Link v2 ST-Link v2 official


The STM32F103xx performance line family incorporates the high-performance ARM® Cortex™-M3 32-bit RISC core operating at a 72 MHz frequency, high-speed embedded memories, and an extensive range of enhanced I/Os and peripherals connected to two APB buses. All devices offer two 12-bit ADCs, three general purpose 16-bit timers plus one PWM timer, as well as standard and advanced communication interfaces: up to two I2Cs and SPIs, three USARTs, an USB and a CAN. The STM32F103xx low-density performance line family operates from a 2.0 to 3.6 V power supply. It is available in both the –40 to +85 °C temperature range and the –40 to +105 °C extended temperature range. A comprehensive set of power-saving mode allows the design of low-power applications.

STM32 STM32F103 line
STM32 STM32F103 line

The STM32F103xx low-density performance line family includes devices in four different package types: from 36 pins to 64 pins. Depending on the device chosen, different sets of peripherals are included, the description below gives an overview of the complete range of peripherals proposed in this family.


Timer3 (No timer 4)4
Serial port2 (No serial port 3)3
  • 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
    • 64 or 128 Kbytes of Flash memory
    • 20 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 80 fast I/O ports
    • 26/37/51/80 I/Os, all mappable on 16 external interrupt vectors and almost all 5 V-tolerant
  • Debug mode
    • Serial wire debug (SWD) & JTAG interfaces
  • 7 timers
    • Three 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
  • Up to 9 communication interfaces
    • Up to 2 x I2C interfaces (SMBus/PMBus)
    • Up to 3 USARTs (ISO 7816 interface, LIN, IrDA capability, modem control)
    • Up to 2 SPIs (18 Mbit/s)
    • CAN interface (2.0B Active)
    • USB 2.0 full-speed interface
  • CRC calculation unit, 96-bit unique ID

How to

  1. STM32F1 Blue-Pill: pinout, specs, and Arduino IDE configuration (STM32duino and STMicroelectronics)
  2. STM32: program (STM32F1) via USB with STM32duino bootloader
  3. STM32: programming (STM32F1 STM32F4) via USB with HID boot-loader
  4. STM32F4 Black-Pill: pinout, specs, and Arduino IDE configuration
  5. STM32: ethernet w5500 with plain HTTP and SSL (HTTPS)
  6. STM32: ethernet enc28j60 with plain HTTP and SSL (HTTPS)
  7. STM32: WiFiNINA with ESP32 WiFi Co-Processor
    1. STM32F1 Blue-pill: WiFi shield (WiFiNINA)
    2. STM32F4 Black-pill: WiFi shield (WiFiNINA)
  8. How to use SD card with stm32 and SdFat library
  9. \STM32: SPI flash memory FAT FS
  10. STM32: internal RTC, clock, and battery backup (VBAT)
  11. STM32 LoRa
    1. Unleashing IoT Potential: Integrating STM32F1 Blue-Pill with EByte LoRa E32, E22, and E220 Shields
    2. Unleashing IoT Potential: Integrating STM32F4 Black-Pill with EByte LoRa E32, E22, and E220 Shields
  1. STM32 Power saving
    1. STM32F1 Blue-Pill clock and frequency management
    2. STM32F4 Black-Pill clock and frequency management
    3. Intro and Arduino vs STM framework
    4. Library LowPower, wiring, and Idle (STM Sleep) mode
    5. Sleep, deep sleep, shutdown, and power consumption
    6. Wake up from RTC alarm and Serial
    7. Wake up from the external source
    8. Backup domain intro and variable preservation across reset
    9. RTC backup register and SRAM preservation
  2. STM32 send emails with attachments and SSL (like Gmail): w5500, enc28j60, SD, and SPI Fash


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4 Responses

  1. Faruk says:

    Hello, I just wanted to thank you. I’m a newbie and this page helps me a lot.

  2. Vaish says:

    Hey, thanks a lot, this page is of great use.

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