ST B-L4S5I-IOT01A - Table 6. ARDUINO Connector Pinout

Table 6. ARDUINO
®
connector pinout
Connector
Pin
number
Pin name Signal name
STM32L
4+ pin
Function
CN2
1 E5V - - -
2 IOREF - - 3.3 V reference
3 NRST STM_NRST NRST Reset
4 3.3V - - 3.3 V I/O
5 5V - - 5 V
6 GND - - GND
7 GND - - GND
8 VIN - - Power input
CN4
1 A0 ARD.A0-ADC PC5 ADC
2 A1 ARD.A1-ADC PC4 ADC
3 A2 ARD.A2-ADC PC3 ADC
4 A3 ARD.A3-ADC PC2 ADC
5 A4 ARD.A4-ADC PC1 ADC / I2C3_SDA
6 A5 ARD.A5-ADC PC0 ADC / I2C3_SCL
CN1
10 SCL / D15 ARD.D15-I2C1_SCL PB8 I2C1_SCL
9 SDA / D14 ARD.D14-I2C1_SDA PB9 I2C1_SDA
8 AVDD VDDA - VDDA
7 GND GND - Ground
6 SCK / D13 ARD.D13-SPI1_SCK / LED1 PA5 SPI1_SCK / LED1
5 MISO / D12 ARD.D12-SPI1_MISO PA6 SPI1_MISO
4 PWM / MOSI / D11 ARD.D11-SPI1_MISO / PWM PA7 SPI1_MOSI / TIMxx
3 PWM / CS / D10 ARD.D10-SPI_SSN / PWM PA2 TIM2_CH3
2 PWM / D9 ARD.D9-PWM PA15 TIM2_CH1
1 D8 ARD.D8 PB2 GPIO
CN3
8 D7 ARD.D7 PA4 GPIO
7 PWM / D6 ARD.D6-PWM PB1 TIM3_CH4
6 PWM / D5 ARD.D5-PWM PB4 TIM3_CH1
5 D4 ARD.D4 PA3 TIMxx
4 PWM / D3 ARD.D3-PWM / INT1_EXTI0 PB0 TIM3_CH3 / EXTI0
3 D2 ARD.D2-INT0_EXTI14 PD14 EXTI14
2 TX / D1 ARD.D1-UART4_TX PA0 UART4_TX
1 RX / D0 ARD.D0-UART4_RX PA1 UART4_RX
UM2708
ARDUINO® Uno V3 connectors
UM2708 - Rev 1
page 27/43