STM32F103C8T6 'Blue Pill' Board
Popular low-cost 32-bit ARM Cortex-M3 development board featuring 72 MHz clock, 64KB Flash, 20KB SRAM, USB 2.0 Full Speed, and 40 breadboard-friendly pins.
Aliase:Blue Pill, STM32F103, STM32 Board, ARM Cortex-M3
40-Pin Dual-Inline Pinout
40 Pins
Pinout Table40
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | PB12 | Digital | SPI2_NSSI2C2_SMBATIM1_BKIN |
| 2 | PB13 | Digital | SPI2_SCKTIM1_CH1N |
| 3 | PB14 | Digital | SPI2_MISOTIM1_CH2N |
| 4 | PB15 | Digital | SPI2_MOSITIM1_CH3N |
| 5 | PA8 | Digital | USART1_CKTIM1_CH1MCO |
| 6 | PA9 | Digital | USART1_TXTIM1_CH2 |
| 7 | PA10 | Digital | USART1_RXTIM1_CH3 |
| 8 | PA11 | Digital | USB_DMCAN_RXTIM1_CH4 |
| 9 | PA12 | Digital | USB_DPCAN_TXTIM1_ETR |
| 10 | PA15 | Digital | JTDISPI1_NSSTIM2_CH1 |
| 11 | PB3 | Digital | JTDOTRACESWOSPI1_SCKTIM2_CH2 |
| 12 | PB4 | Digital | NJTRSTSPI1_MISOTIM3_CH1 |
| 13 | PB5 | Digital | I2C1_SMBASPI1_MOSITIM3_CH2 |
| 14 | PB6 | Digital | I2C1_SCLTIM4_CH1USART1_TX |
| 15 | PB7 | Digital | I2C1_SDATIM4_CH2USART1_RX |
| 16 | PB8 | Digital | TIM4_CH3I2C1_SCLCAN_RX |
| 17 | PB9 | Digital | TIM4_CH4I2C1_SDACAN_TX |
| 18 | 5V | Power | +5V Power InputUSB 5V |
| 19 | GND | Ground | Ground (0V) |
| 20 | 3V3 | Power | +3.3V Power Rail Output |
| 21 | GND | Ground | Ground (0V) |
| 22 | GND | Ground | Ground (0V) |
| 23 | 3V3 | Power | +3.3V Power Rail Output |
| 24 | RESET | Reset | NRST System Reset (Active Low) |
| 25 | PB11 | Digital | I2C2_SDAUSART3_RXTIM2_CH4 |
| 26 | PB10 | Digital | I2C2_SCLUSART3_TXTIM2_CH3 |
| 27 | PB1 | Analog | ADC12_IN9TIM3_CH4TIM1_CH3N |
| 28 | PB0 | Analog | ADC12_IN8TIM3_CH3TIM1_CH2N |
| 29 | PA7 | Analog | ADC12_IN7TIM3_CH2SPI1_MOSI |
| 30 | PA6 | Analog | ADC12_IN6TIM3_CH1SPI1_MISO |
| 31 | PA5 | Analog | ADC12_IN5SPI1_SCK |
| 32 | PA4 | Analog | ADC12_IN4SPI1_NSSUSART2_CK |
| 33 | PA3 | Analog | ADC12_IN3TIM2_CH4USART2_RX |
| 34 | PA2 | Analog | ADC12_IN2TIM2_CH3USART2_TX |
| 35 | PA1 | Analog | ADC12_IN1TIM2_CH2USART2_RTS |
| 36 | PA0 | Analog | ADC12_IN0WKUPTIM2_CH1USART2_CTS |
| 37 | PC15 | Digital | OSC32_OUT32.768kHz Crystal |
| 38 | PC14 | Digital | OSC32_IN32.768kHz Crystal |
| 39 | PC13 | Digital | Onboard Green LEDTAMPER |
| 40 | VBAT | Power | Backup Battery Supply (1.8V - 3.6V) |