STM32L031X4 Datasheet, PDF (42/118 Pages) STMicroelectronics – Access line ultra-low-power 32-bit MCU ARM-based Cortex-M0+, up to 32KB Flash, 8KB SRAM, 1KB EEPROM, ADC

Pin descriptions
Pin Number
Table 15. Pin definitions (continued)
STM32L031x4/6
Pin name
(function
after reset)
Pin
type
Note
Alternate
functions
Additional functions
- - - - - - 35
- D1 - - - - 36
20 A2 22 22 24 24 37
- - 23 23 25 25 38
- B2 24 24 26 26 39
- - - 25 27 27 40
- - - 26 28 28 41
- A3 25 27 29 29 42
- A4 26 28 30 30 43
VSS
VDD
PA14
PA15
PB3
PB4
PB5
PB6
PB7
S- -
S- -
I/O FT -
I/O FT -
I/O FT -
I/O FT -
I/O FT -
I/O FTf -
I/O FTf -
-
-
SWCLK,
LPTIM1_OUT,
I2C1_SMBA,
USART2_TX,
LPUART1_TX
SPI1_NSS,
TIM2_ETR,
EVENTOUT,
USART2_RX,
TIM2_CH1
SPI1_SCK,
TIM2_CH2,
EVENTOUT
SPI1_MISO,
EVENTOUT,
TIM22_CH1
SPI1_MOSI,
LPTIM1_IN1,
I2C1_SMBA,
TIM22_CH2
USART2_TX,
I2C1_SCL,
LPTIM1_ETR,
TIM21_CH1
USART2_RX,
I2C1_SDA,
LPTIM1_IN2
-
-
-
--
COMP2_INN
COMP2_INP
COMP2_INP
COMP2_INP
COMP2_INP,
VREF_PVD_IN
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