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Pin descriptions STM32L052x6 STM32L052x8
48/143 DocID025936 Rev 8
Table 18. Alternate function port B
Port
AF0 AF1 AF2 AF3 AF4 AF5 AF6
SPI1/SPI2/I2S2/
USART1/
EVENTOUT/
I2C1
LPUART1/LPTIM
/TIM2/SYS_AF/
EVENTOUT
I2C1/TSC
I2C1/TIM22/
EVENTOUT/
LPUART1
SPI2/I2S2/I2C2
I2C2/TIM21/
EVENTOUT
Port B
PB0 EVENTOUT - - TSC_G3_IO2 - - -
PB1 - - - TSC_G3_IO3
LPUART1_RTS_
DE
--
PB2 - - LPTIM1_OUT TSC_G3_IO4 - - -
PB3 SPI1_SCK - TIM2_CH2 TSC_G5I_O1 EVENTOUT - -
PB4 SPI1_MISO - EVENTOUT TSC_G5_IO2 TIM22_CH1 - -
PB5 SPI1_MOSI - LPTIM1_IN1 I2C1_SMBA TIM22_CH2 - -
PB6 USART1_TX I2C1_SCL LPTIM1_ETR TSC_G5_IO3 - - -
PB7 USART1_RX I2C1_SDA LPTIM1_IN2 TSC_G5_IO4 - - -
PB8 - - - TSC_SYNC I2C1_SCL - -
PB9 - - EVENTOUT - I2C1_SDA
SPI2_NSS/I2S2_
WS
-
PB10 - - TIM2_CH3 TSC_SYNC LPUART1_TX SPI2_SCK I2C2_SCL
PB11 EVENTOUT - TIM2_CH4 TSC_G6_IO1 LPUART1_RX I2C2_SDA
PB12 SPI2_NSS/I2S2_WS -
LPUART1_RTS_
DE
TSC_G6_IO2 - I2C2_SMBA EVENTOUT
PB13 SPI2_SCK/I2S2_CK - - TSC_G6_IO3 LPUART1_CTS I2C2_SCL TIM21_CH1
PB14 SPI2_MISO/I2S2_MCK - RTC_OUT TSC_G6_IO4
LPUART1_RTS_
DE
I2C2_SDA TIM21_CH2
PB15 SPI2_MOSI/I2S2_SD - RTC_REFIN - - - -
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