Datasheet

STM32L071xx Pin descriptions
DS10690 Rev 6 49/144
Table 17. Alternate functions port B
Port
AF0 AF1 AF2 AF3 AF4 AF5 AF6 AF7
SPI1/SPI2/I2S2/
USART1/2/
LPUART1/
LPTIM1/
TIM2/21/22/
EVENTOUT/
SYS_AF
SPI1/SPI2/I2S2/I
2C1/TIM2/21
SPI1/SPI2/I2S2/
LPUART1/
USART5/LPTIM
1/TIM2/3/EVENT
OUT/
SYS_AF
I2C1/
EVENTOUT
I2C1/USART1/2/
LPUART1/
TIM3/22/
EVENTOUT
SPI2/I2S2/I2C2/
USART1/
TIM2/21/22
I2C1/2/
LPUART1/
USART4/
UASRT5/TIM21/
EVENTOUT
I2C3/LPUART1/
COMP1/2/
TIM3
Port B
PB0 EVENTOUT TIM3_CH3 - - - -
PB1 - TIM3_CH4
LPUART1_RTS/
LPUART1_DE
---
PB2 - - LPTIM1_OUT - - - I2C3_SMBA
PB3 SPI1_SCK TIM2_CH2 EVENTOUT
USART1_RTS/
USART1_DE
USART5_TX -
PB4 SPI1_MISO TIM3_CH1 TIM22_CH1 USART1_CTS USART5_RX I2C3_SDA
PB5 SPI1_MOSI LPTIM1_IN1 I2C1_SMBA
TIM3_CH2/
TIM22_CH2
USART1_CK
USART5_CK,
USART5_RTS/
USART5_DE
-
PB6 USART1_TX I2C1_SCL LPTIM1_ETR - - - -
PB7 USART1_RX I2C1_SDA LPTIM1_IN2 - - USART4_CTS -
PB8 - - I2C1_SCL - - -
PB9 - EVENTOUT - I2C1_SDA
SPI2_NSS/
I2S2_WS
--
PB10 - TIM2_CH3 LPUART1_TX SPI2_SCK I2C2_SCL LPUART1_RX
PB11 EVENTOUT TIM2_CH4 LPUART1_RX - I2C2_SDA LPUART1_TX
PB12 SPI2_NSS/I2S2_WS
LPUART1_RTS/
LPUART1_DE
I2C2_SMBA EVENTOUT -
PB13 SPI2_SCK/I2S2_CK MCO LPUART1_CTS I2C2_SCL TIM21_CH1 -
PB14
SPI2_MISO/
I2S2_MCK
RTC_OUT
LPUART1_RTS/
LPUART1_DE
I2C2_SDA TIM21_CH2 -
PB15
SPI2_MOSI/
I2S2_SD
RTC_REFIN - - - - -
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