Datasheet

ManualsBrandsST ManualsEmbedded Processors & ControllersMicrocontroller 32bit 128KB LQFP

STM32L431xx Pinouts and pin description

DocID028800 Rev 1 65/200

Port B

PB0 - TIM1_CH2N - - - SPI1_NSS - USART3_CK

PB1-TIM1_CH3N-----

USART3_RTS_

PB2 RTC_OUT LPTIM1_OUT - - I2C3_SMBA - - -

PB3

JTDO-

TRACESWO

TIM2_CH2 - - - SPI1_SCK SPI3_SCK

USART1_RTS_

PB4 NJTRST - - - I2C3_SDA SPI1_MISO SPI3_MISO USART1_CTS

Port B

PB5 - LPTIM1_IN1 - - I2C1_SMBA SPI1_MOSI SPI3_MOSI USART1_CK

PB6 - LPTIM1_ETR - - I2C1_SCL - - USART1_TX

PB7 - LPTIM1_IN2 - - I2C1_SDA - - USART1_RX

PB8----I2C1_SCL---

PB9 - IR_OUT - - I2C1_SDA SPI2_NSS - -

PB10 - TIM2_CH3 - - I2C2_SCL SPI2_SCK - USART3_TX

PB11 - TIM2_CH4 - - I2C2_SDA - - USART3_RX

PB12 - TIM1_BKIN -

TIM1_BKIN_

COMP2

I2C2_SMBA SPI2_NSS - USART3_CK

PB13 - TIM1_CH1N - - I2C2_SCL SPI2_SCK - USART3_CTS

PB14 - TIM1_CH2N - - I2C2_SDA SPI2_MISO -

USART3_RTS_

PB15 RTC_REFIN TIM1_CH3N - - - SPI2_MOSI - -

Table 15. Alternate function AF0 to AF7 (for AF8 to AF15 see Table 16) (continued)

Port

AF0 AF1 AF2 AF3 AF4 AF5 AF6 AF7

SYS_AF

TIM1/TIM2/

LPTIM1

TIM1/TIM2 USART2 I2C1/I2C2/I2C3 SPI1/SPI2 SPI3

USART1/

USART2/

USART3

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