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.

Sorted by Pin Name




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




  
PA0
  
PA_0
  
USART2_CTS, UART4_TX, ADC1_IN0


  
PA1
  
PA_1
  
SPI4_MOSI, USART2_RTS, UART4_RX, ADC1_IN1


  
PA2
  
PA_2
  
USART2_TX, ADC1_IN2


  
PA3
  
PA_3/A0
  
USART2_RX, ADC1_IN3


  
PA4
  
PA_4
  
SPI1_NSS, SPI3_NSS, USART2_CK, ADC1_IN4, DAC_OUT1


  
PA5
  
PA_5/D13
  
SPI1_SCK, ADC1_IN5, DAC_OUT2


  
PA6
  
PA_6/D12
  
SPI1_MISO, ADC1_IN6


  
PA7
  
PA_7/D11
  
SPI1_MOSI, ADC1_IN7


  
PA8
  
PA_8
  
I2C3_SCL, USART1_CK, UART7_RX, CAN3_RX


  
PA9
  
PA_9
  
I2C3_SMBA, SPI2_SCK, USART1_TX


  
PA10
  
PA_10
  
SPI2_MOSI, SPI5_MOSI, USART1_RX


  
PA11
  
PA_11
  
SPI2_NSS, SPI4_MISO, USART1_CTS, USART6_TX, CAN1_RX, UART4_RX


  
PA12
  
PA_12
  
SPI2_MISO, SPI5_MISO, USART1_RTS, USART6_RX, CAN1_TX, UART4_TX


  
PA13
  
PA_13
  
SWDIO


  
PA14
  
PA_14
  
SWCLK


  
PA15
  
PA_15
  
JTDI, SPI1_NSS,SPI3_NSS, USART1_TX, UART7_TX, CAN3_TX


  
PB0
  
PB_0/LED1
  
SPI5_SCK, ADC1_IN8, LED1


  
PB1
  
PB_1
  
SPI5_NSS, ADC1_IN9


  
PB2
  
PB_2
  
BOOT1


  
PB3
  
PB_3
  
SWO, I2CFMP1_SDA, SPI1_SCK, SPI3_SCK, USART1_RX, UART7_RX, I2C2_SDA, CAN3_RX


  
PB4
  
PB_4
  
SPI1_MISO, SPI3_MISO, UART7_TX, I2C3_SDA, CAN3_TX


  
PB5
  
PB_5
  
I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, CAN2_RX, UART5_RX


  
PB6
  
PB_6
  
I2C1_SCL, USART1_TX, CAN2_TX, UART5_TX


  
PB7
  
PB_7/LED2
  
I2C1_SDA, USART1_RX, LED2


  
PB8
  
PB_8
  
I2C1_SCL, SPI5_MOSI, CAN1_RX, I2C3_SDA, UART5_RX


  
PB9
  
PB_9
  
I2C1_SDA, SPI2_NSS, CAN1_TX, I2C2_SDA, UART5_TX


  
PB10
  
PB_10
  
I2C2_SCL, SPI2_SCK, USART3_TX, I2CFMP1_SCL


  
PB12
  
PB_12
  
I2C2_SMBA, SPI2_NSS, SPI4_NSS, SPI3_SCK, USART3_CK, CAN2_RX, UART5_RX


  
PB13
  
PB_13
  
I2CFMP1_SMBA, SPI2_SCK, SPI4_SCK, USART3_CTS, CAN2_TX, UART5_TX


  
PB14
  
PB_14/LED3
  
I2CFMP1_SDA, SPI2_MISO, USART3_RTS, LED3


  
PB15
  
PB_15
  
I2CFMP1_SCL, SPI2_MOSI


  
PC0
  
PC_0/A1
  
ADC1_IN10


  
PC1
  
PC_1/A3
  
ADC1_IN11


  
PC2
  
PC_2
  
SPI2_MISO, ADC1_IN12


  
PC3
  
PC_3/A2
  
SPI2_MOSI, ADC1_IN13


  
PC4
  
PC_4/A4
  
ADC1_IN14


  
PC5
  
PC_5/A5
  
I2CFMP1_SMBA, USART3_RX, ADC1_IN15


  
PC6
  
PC_6
  
I2CFMP1_SCL, USART6_TX


  
PC7
  
PC_7
  
I2CFMP1_SDA, SPI2_SCK, USART6_RX


  
PC8
  
PC_8
  
USART6_CK


  
PC9
  
PC_9
  
I2C3_SDA


  
PC10
  
PC_10
  
USB_TX (USART3_TX), SPI3_SCK


  
PC11
  
PC_11
  
USB_RX (USART3_RX), SPI3_MISO, UART4_RX


  
PC12
  
PC_12
  
SPI3_MOSI, USART3_CK, UART5_TX


  
PC13
  
PC_13/BUTTON1
  
ANTI_TAMP (BUTTON1)


  
PC14
  
PC_14
  
OSC32_IN


  
PC15
  
PC_15
  
OSC32_OUT


  
PD2
  
PD_2
  
UART5_RX


  
PH2
  
PH_0
  
OSC_IN


  
PH2
  
PH_1
  
OSC_OUT