STM32L081CB Datasheet, PDF(37/110 Page) STMicroelectronics – Access line ultra-low-power 32-bit MCU ARM-based Cortex-M0+, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, ADC, AES

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STM32L081CB Datasheet, PDF (37/110 Pages) STMicroelectronics – Access line ultra-low-power 32-bit MCU ARM-based Cortex-M0+, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, ADC, AES

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STM32L081xx

Pin number

Table 14. STM32L081xxx pin definition (continued)

Pin descriptions

Pin name

(function after

reset)

Note Alternate functions Additional functions

SPI2_SCK/I2S2_CK,

-

-

26

PB13

I/O FTf - MCO, LPUART1_CTS,

-

I2C2_SCL, TIM21_CH1

SPI2_MISO/I2S2_MCK,

-

-

27

PB14

I/O FTf -

RTC_OUT,

LPUART1_RTS_DE,

-

I2C2_SDA, TIM21_CH2

-

-

28

PB15

I/O FT

-

SPI2_MOSI/I2S2_SD,

RTC_REFIN

-

MCO, EVENTOUT,

18

18

29

PA8

I/O FTf -

USART1_CK,

-

I2C3_SCL

19

19

30

PA9

I/O FTf

-

MCO, USART1_TX,

I2C1_SCL, I2C3_SMBA

-

20

20

31

PA10

I/O FTf -

USART1_RX,

I2C1_SDA

-

SPI1_MISO,

21

21

32

PA11

I/O FT -

EVENTOUT,

USART1_CTS,

-

COMP1_OUT

SPI1_MOSI,

22

22

33

PA12

I/O FT -

EVENTOUT,

USART1_RTS_DE,

-

COMP2_OUT

23

23

34

PA13

I/O FT - SWDIO, LPUART1_RX

-

-

-

35

VSS

S- -

-

-

-

24

36

VDDIO2

S- -

-

-

24

25

37

PA14

I/O FT

-

SWCLK, USART2_TX,

LPUART1_TX

-

SPI1_NSS, TIM2_ETR,

EVENTOUT,

25

-

38

PA15

I/O FT -

USART2_RX,

-

TIM2_CH1,

USART4_RTS_DE

DocID027513 Rev 4

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