Datasheet
Pin descriptions STM32L031x4/6
46/126 DS10668 Rev 6
Port B
PB0 EVENTOUT SPI1_MISO - -
USART2_RTS/
USART2_DE
TIM2_CH3 - -
PB1 USART2_CK SPI1_MOSI - -
LPUART1_RTS
/LPUART1_DE
TIM2_CH4 - -
PB2 - - LPTIM1_OUT - - - - -
PB3 SPI1_SCK - TIM2_CH2 - EVENTOUT - - -
PB4 SPI1_MISO - EVENTOUT - TIM22_CH1 - - -
PB5 SPI1_MOSI - LPTIM1_IN1 I2C1_SMBA TIM22_CH2 - - -
PB6 USART2_TX I2C1_SCL LPTIM1_ETR - - TIM21_CH1 - -
PB7 USART2_RX I2C1_SDA LPTIM1_IN2 - - - - -
PB8 - - - - I2C1_SCL - - -
PB9 - - EVENTOUT - I2C1_SDA - - -
PB10 - - TIM2_CH3 - - - LPUART1_TX -
PB11 EVENTOUT - TIM2_CH4 - - - LPUART1_RX -
PB12 SPI1_NSS - - - - - EVENTOUT -
PB13 SPI1_SCK - MCO - - TIM21_CH1 LPUART1_CTS -
PB14 SPI1_MISO - RTC_OUT - - TIM21_CH2
LPUART1_RTS
/LPUART1_DE
-
PB15 SPI1_MOSI - RTC_REFIN - - - - -
Port C PC0 LPTIM1_IN1 - EVENTOUT - - - LPUART1_RX -
Port H
PH0------- -
PH1------- -
Table 16. Alternate functions (continued)
Ports
AF0 AF1 AF2 AF3 AF4 AF5 AF6 AF7
SPI1/USART2
/LPTIM/TIM21
/EVENTOUT/
SYS_AF
SPI1/I2C1/
LPTIM
LPTIM/TIM2/
EVENTOUT/
SYS_AF
I2C1/
EVENTOUT
I2C1/USART2/
LPUART1/
TIM22/
EVENTOUT
TIM2/21/22
LPUART1/
EVENTOUT
COMP1/2
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