Datasheet
Pin descriptions STM32L073xx
50/137 DocID027096 Rev 2
Table 17. Alternate functions port A
Port
AF0 AF1 AF2 AF3 AF4 AF5 AF6 AF7
SPI1/SPI2/I2S2/U
SART1/2/
LPUART1/USB/L
PTIM1/TSC/
TIM2/21/22/
EVENTOUT/
SYS_AF
SPI1/SPI2/I2S2/I2
C1/LCD/
TIM2/21
SPI1/SPI2/I2S2/L
PUART1/
USART5/USB/LP
TIM1/TIM2/3/EVE
NTOUT/
SYS_AF
I2C1/TSC/
EVENTOUT
I2C1/USART1/2/
LPUART1/
TIM3/22/
EVENTOUT
SPI2/I2S2/I2C2/U
SART1/
TIM2/21/22
I2C1/2/
LPUART1/
USART4/
UASRT5/TIM21/E
VENTOUT
I2C3/LPUART1/C
OMP1/2/
TIM3
Port A
PA0 - - TIM2_CH1 TSC_G1_IO1 USART2_CTS TIM2_ETR USART4_TX COMP1_OUT
PA1 EVENTOUT LCD_SEG0 TIM2_CH2 TSC_G1_IO2
USART2_RTS_D
E
TIM21_ETR USART4_RX -
PA2 TIM21_CH1 LCD_SEG1 TIM2_CH3 TSC_G1_IO3 USART2_TX - LPUART1_TX COMP2_OUT
PA3 TIM21_CH2 LCD_SEG2 TIM2_CH4 TSC_G1_IO4 USART2_RX - LPUART1_RX -
PA4 SPI1_NSS - - TSC_G2_IO1 USART2_CK TIM22_ETR - -
PA5 SPI1_SCK - TIM2_ETR TSC_G2_IO2 TIM2_CH1 - -
PA6 SPI1_MISO LCD_SEG3 TIM3_CH1 TSC_G2_IO3 LPUART1_CTS TIM22_CH1 EVENTOUT COMP1_OUT
PA7 SPI1_MOSI LCD_SEG4 TIM3_CH2 TSC_G2_IO4 - TIM22_CH2 EVENTOUT COMP2_OUT
PA8 MCO LCD_COM0
USB_CRS_
SYNC
EVENTOUT USART1_CK - - I2C3_SCL
PA9 MCO LCD_COM1 - TSC_G4_IO1 USART1_TX - I2C1_SCL I2C3_SMBA
PA10 - LCD_COM2 - TSC_G4_IO2 USART1_RX - I2C1_SDA -
PA11 SPI1_MISO - EVENTOUT TSC_G4_IO3 USART1_CTS - - COMP1_OUT
PA12 SPI1_MOSI - EVENTOUT TSC_G4_IO4
USART1_RTS_
DE
- - COMP2_OUT
PA13 SWDIO - USB_OE - - - LPUART1_RX -
PA14 SWCLK - - - USART2_TX - LPUART1_TX -
PA15 SPI1_NSS LCD_SEG17 TIM2_ETR EVENTOUT USART2_RX TIM2_CH1
USART4_RTS_D
E
-
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