Connector Pin number Pin name Signal name
STM32 pin
(1)
Function
(1)
CN8
3 A2 ADC PA10 ADC1_IN6
4 A3 ADC PB4 ADC1_IN3
5 A4 ADC PB14 ADC1_IN1 / I2C3_SDA
6 A5 ADC PB13 ADC1_IN0 / I2C3_SCL
CN5
1 D8 ARD_D8 PC2 IO
2 PWM / D9 ARD_D9 PA9 TIM1_CH2
3 PWM /CS / D10 ARD_D10 PA4 LPTIM1_OUT / SPI1_NSS
4 PWM / MOSI / D11 ARD_D11 PA7 TIM17_CH1 / SPI1_MOSI
5 MISO / D12 ARD_D12 PA6 SPI1_MISO
6 SCK / D13 ARD_D13 PA5 SPI1_SCK
7 GND - - GND
8 AVDD AVDD AVVD / VREF+ Voltage reference
9 SDA / D14 ARD_D14 PA11 I2C1_SDA
10 SCL / D15 ARD_D15 PA12 I2C1_SCL
CN9
1 D7 ARD_D7 PC1 IO
2 PWM / D6 ARD_D6 PB10 TIM2_CH3
3 PWM/D5 ARD_D5 PB8 TIM16_CH1
4 D4 ARD_D4 PB5 IO
5 PWM / D3 ARD_D3 PB3 TIM2_CH2
6 D2 ARD_D2 PB12 IO
7 TX / D1 ARD_D1 PA2 / PB6
LPUSART1_TX /
USART1_TX
8 RX / D0 ARD_D0 PA3 / PB7
LPUSART1_RX /
USART1_RX
1. Default configuration is in bold.
UM2592
CN5, CN6, CN8, and CN9 ARDUINO® Uno V3 connectors
UM2592 - Rev 1
page 35/49
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