Datasheet

DS10668 Rev 6 43/126
STM32L031x4/6 Pin descriptions
46
- - - - 22 22 33 33 PA12 I/O FT -
SPI1_MOSI,
EVENTOUT,
USART2_RTS/
USART2_DE,
COMP2_OUT
-
19 A1 21 21 23 23 34 34 PA13 I/O FT -
SWDIO,
LPTIM1_ETR,
LPUART1_RX
-
- - - - - - 35 35 VSS S - - - -
-D1 - - - - 3636 VDD S - - - -
20 A2 22 22 24 24 37 37 PA14 I/O FT -
SWCLK,
LPTIM1_OUT,
I2C1_SMBA,
USART2_TX,
LPUART1_TX
-
- - 23 23 25 25 38 38 PA15 I/O FT -
SPI1_NSS,
TIM2_ETR,
EVENTOUT,
USART2_RX,
TIM2_CH1
--
- B2242426263939 PB3 I/O FT -
SPI1_SCK,
TIM2_CH2,
EVENTOUT
COMP2_INN
- - - 2527274040 PB4 I/O FT -
SPI1_MISO,
EVENTOUT,
TIM22_CH1
COMP2_INP
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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