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STM32L010F4/K4 Pin descriptions
DS12323 Rev 2 33/91
Table 11. Alternate functions
Port
AF0 AF1 AF2 AF3 AF4 AF5 AF6
SPI1/USART2/
TIM21/
EVENOUT/
SYS_AF
SPI1/I2C1/
LPTIM
LPUART1/
LPTIM/TIM2/E
VENOUT/
SYS_AF
I2C1/EVENOUT
I2C1/
USART2/
LPUART1/
EVENOUT
SPI1/TIM2/
TIM21
LPUART1/
EVENOUT
Port A
PA0 USART2_RX LPTIM1_IN1 TIM2_CH1 - USART2_CTS TIM2_ETR LPUART1_RX
PA1 EVENTOUT LPTIM1_IN2 TIM2_CH2 I2C1_SMBA USART2_RTS TIM21_ETR LPUART1_TX
PA2 TIM21_CH1 - TIM2_CH3 - USART2_TX - LPUART1_TX
PA3 TIM21_CH2 - TIM2_CH4 - USART2_RX - LPUART1_RX
PA4 SPI1_NSS LPTIM1_IN1 LPTIM1_ETR I2C1_SCL USART2_CK TIM2_ETR LPUART1_TX
PA5 SPI1_SCK LPTIM1_IN2 TIM2_ETR - - TIM2_CH1 -
PA6 SPI1_MISO LPTIM1_ETR - LPUART1_CTS - EVENTOUT
PA7 SPI1_MOSI LPTIM1_OUT - USART2_CTS TIM21_ETR EVENTOUT
PA8 MCO - LPTIM1_IN1 EVENTOUT USART2_CK TIM2_CH1 -
PA9 MCO I2C1_SCL LPTIM1_OUT - USART2_TX TIM21_CH2 -
PA10 TIM21_CH1 I2C1_SDA RTC_REFIN - USART2_RX TIM2_CH3 -
PA11 SPI1_MISO LPTIM1_OUT EVENTOUT - USART2_CTS TIM21_CH2 -
PA12 SPI1_MOSI - EVENTOUT - USART2_RTS - -
PA13 SWDIO LPTIM1_ETR - I2C1_SDA - SPI1_SCK LPUART1_RX
PA14 SWCLK LPTIM1_OUT - I2C1_SMBA USART2_TX SPI1_MISO LPUART1_TX
PA15 SPI1_NSS - TIM2_ETR EVENTOUT USART2_RX TIM2_CH1 -
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