Pins.md
Pins

This document describes the different functions of each pin on the STM32 MCU. The highlighted functions are the recommended function to use for the pin, though not all of the recommendations must be followed. Some recommendations, however (such as those required for SWD programming/debugging) must be followed. See the datasheet for more details.

The MbedOS pin names are defined in the ]]>github repo]]>.

Sorted by Pin Name




  
STM Pin Name
  
MbedOS Pin Name(s)
  
Function(s)
  
Usage




  
PA0
  
PA_0/A0
  
USART2_CTS, ADC12_IN1
  
_


  
PA1
  
PA_1/A1
  
USART2_RTS_DE, ADC12_IN2
  
_


  
PA2
  
PA_2
  
USART2_TX, ADC1_IN3
  
_


  
PA3
  
PA_3
  
USART2_RX, SPI1_CLK, ADC1_IN4
  
_


  
PA4
  
PA_4/A2
  
SPI1_NSS, SPI3_NSS, USART2_CK, ADC2_IN17, DAC1_OUT1
  
_


  
PA5
  
PA_5/D13
  
SPI1_SCK, ADC2_IN13, DAC1_OUT2
  
_


  
PA6
  
PA_6/D12
  
SPI1_MISO, ADC2_IN3, DAC2_OUT1
  
_


  
PA7
  
PA_7/D11
  
SPI1_MOSI, ADC2_IN4
  
_


  
PA8
  
PA_8/D7
  
I2C3_SCL, I2C2_SDA, USART1_CK, FDCAN3_RX, ADC5_IN1
  
_


  
PA9
  
PA_9/D8
  
I2C3_SMBA, I2C2_SCL, USART1_TX, ADC5_IN2
  
_


  
PA10
  
PA_10/D2
  
I2C2_SMBA, SPI2_MISO, USART1_RX
  
_


  
PA11
  
PA_11
  
SPI2_MOSI, USART1_CTS, FDCAN1_RX
  
MAIN_CAN_RX


  
PA12
  
PA_12
  
USART1_RTS_DE, FDCAN1_TX
  
MAIN_CAN_TX


  
PA13
  
PA_13
  
SWDIO
  
SWDIO


  
PA14
  
PA_14
  
SWCLK
  
SWCLK


  
PA15
  
PA_15
  
JTDI, I2C1_SCL, SPI1_NSS, SPI3_NSS, USART2_RX, UART4_RTS_DE, FDCAN3_TX
  
JTDI (not used)


  
PB0
  
PB_0/A3
  
ADC3_IN12,ADC1_IN15
  
_


  
PB1
  
PB_1
  
ADC3_IN1, ADC1_IN12
  
_


  
PB2
  
PB_2
  
I2C3_SMBA, ADC2_IN12
  
_


  
PB3
  
PB_3/D3
  
SWO, SPI1_SCK, SPI3_SCK, USART2_TX, FDCAN3_RX
  
SWO


  
PB4
  
PB_4/D5
  
SPI1_MISO, SPI3_MISO, USART2_RX, UART5_RTS_DE, FDCAN3_TX
  
_


  
PB5
  
PB_5/D4
  
I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, USART2_CK, I2C3_SDA, FDCAN2_RX, UART5_CTS
  
_


  
PB6
  
PB_6/D10
  
USART1_TX, FDCAN2_TX
  
USB_TX


  
PB7
  
PB_7
  
I2C4_SDA, I2C1_SDA, USART1_RX, USART4_CTS
  
USB_RX


  
PB8
  
PB_8/D15
  
I2C1_SCL, USART3_TX, FDCAN1_RX, BOOT0
  
BOOT0


  
PB9
  
PB_9/D14
  
I2C1_SDA, USART3_TX, FDCAN1_TX, I2C2_SDA, UART5_TX
  
_


  
PB10
  
PB_10/D6
  
USART3_TX, SPI1_SCK
  
MAIN_CAN_STBY (can be on any pin)


  
PB11
  
PB_11
  
USART3_RX, ADC12_IN14
  
_


  
PB12
  
PB_12
  
I2C2_SMBA, SPI2_NSS, USART3_CK, FDCAN2_RX, ADC4_IN3, ADC1_IN11
  
_


  
PB13
  
PB_13
  
SPI2_SCK, USART3_CTS, FDCAN2_TX, ADC3_IN5
  
_


  
PB14
  
PB_14
  
SPI2_MISO, USART3_RTS_DE, ADC4_IN4, ADC1_IN5
  
_


  
PB15
  
PB_15
  
SPI2_MOSI, ADC4_IN5, ADC2_IN15
  
_


  
PC13
  
PC_13
  

  
_


  
PC14
  
PC_14
  
OSC32_IN
  
OSC32_IN


  
PC15
  
PC_15
  
OSC32_OUT
  
OSC32_OUT (not used)


  
PF0
  
PF_0
  
OSC_IN
  
OSC_IN


  
PF1
  
PF_1
  
OSC_OUT
  
OSC_OUT (not used)


  
PG10
  
PG_10
  
NRST
  
NRST