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- Arduino Pin STM32 Port/Pin Alternative Functions Notes
- Digital Pins
- D0 PA10 USART1_RX
- D1 PA9 USART1_TX
- D2 PA12
- D3 PB0
- D4 PB7 I2C1_SDA
- D5 PB6 I2C1_SCL
- D6 PB1
- D9 PA8
- D10 PA11
- D11 PB5 SPI1_MOSI
- D12 PB4 SPI1_MISO
- D13 PB3 SPI1_SCK, LED_BUILTIN User LED (LD3)
- Analog Pins
- A0 PA0 ADC_IN0, BUTTON User button
- A1 PA1 ADC_IN1
- A2 PA3 ADC_IN3
- A3 PA4 ADC_IN4
- A4 PA5 ADC_IN5 Input only by default*
- A5 PA6 ADC_IN6 Input only by default*
- A6 PA7 ADC_IN7
- A7 PA2 ADC_IN2, USART2_TX
- Additional Pins
- UART_RX PA15 USART2_RX Virtual COM port
- UART_TX PA2 USART2_TX Virtual COM port
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