Datasheet

Pin descriptions STM32L031x4/6
40/126 DS10668 Rev 6
7B4 7 7 7 7 1111 PA1 I/OFT -
EVENTOUT,
LPTIM1_IN2,
TIM2_CH2,
I2C1_SMBA,
USART2_RTS/
USART2_DE,
TIM21_ETR
COMP1_INP,
ADC_IN1
8D4 8 8 8 8 1212 PA2 I/OTC -
TIM21_CH1,
TIM2_CH3,
USART2_TX,
LPUART1_TX,
COMP2_OUT
COMP2_INM6,
ADC_IN2,
RTC_TAMP3/RTC_TS
/RTC_OUT/WKUP3
9E4 9 9 9 9 1313 PA3 I/OFT -
TIM21_CH2,
TIM2_CH4,
USART2_RX,
LPUART1_RX
COMP2_INP,
ADC_IN3
10 B3 10 10 10 10 14 14 PA4 I/O TC -
SPI1_NSS,
LPTIM1_IN1,
USART2_CK,
TIM22_ETR
COMP1_INM4,
COMP2_INM4,
ADC_IN4
11 D3 11 11 11 11 15 15 PA5 I/O TC -
SPI1_SCK,
LPTIM1_IN2,
TIM2_ETR,
TIM2_CH1
COMP1_INM5,
COMP2_INM5,
ADC_IN5
12 E3 12 12 12 12 16 16 PA6 I/O FT -
SPI1_MISO,
LPTIM1_ETR,
LPUART1_CTS,
TIM22_CH1,
EVENTOUT,
COMP1_OUT
ADC_IN6
Table 15. Pin definitions (continued)
Pin Number
Pin name
(function
after reset)
Pin
type
I/O structure
Note
Alternate
functions
Additional functions
TSSOP20
WLCSP25
UFQFPN28
UFQFPN28 (STM32L031GxUxS only)
LQFP32
UFQFPN32
(1)
LQFP48
UFQFPN48
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