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    FilesTemplateDocumentation
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    Importing.md
    Layout.md
    Libraries.md
    Pins.md
    TemplateDocumentation.md
    		 
    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 <![CDATA[]]>github repo<![CDATA[]]>.
    


    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
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