STM32L021D4 datasheet(39/114 Pages) STMICROELECTRONICS

部件名	STM32L021D4

功能描述	Access line ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, 16KB Flash, 2KB SRAM, 512B EEPROM, ADC, AES

PDF	114 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

39 / 114 page

DocID027982 Rev 5

39/114

STM32L021x4

Pin descriptions

PA14

I/O

(7)

SWCLK,

LPTIM1_OUT,

I2C1_SMBA,

USART2_TX,

SPI1_MISO,

LPUART1_TX,

COMP2_OUT

PA15

I/O

SPI1_NSS,

TIM2_ETR,

EVENTOUT,

USART2_RX,

TIM2_CH1

PB3

I/O

SPI1_SCK,

TIM2_CH2,

EVENTOUT

COMP2_INM

PB4

I/O

SPI1_MISO,

EVENTOUT

COMP2_INP

PB5

I/O

SPI1_MOSI,

LPTIM1_IN1,

I2C1_SMBA,

TIM21_CH1

COMP2_INP

PB6

I/O

FTf

USART2_TX,

I2C1_SCL,

LPTIM1_ETR,

TIM2_CH3,

LPUART1_TX

COMP2_INP

PB7

I/O

FTf

USART2_RX,

I2C1_SDA,

LPTIM1_IN2,

TIM2_CH4,

LPUART1_RX

COMP2_INP,

VREF_PVD_IN

120

131

PB9-BOOT0

BOOT0 (Boot

memory selection)

-----

PB8

I/O

FTf

USART2_TX,

EVENTOUT,

I2C1_SCL,

SPI1_NSS

Table 12. Pin definitions (continued)

Pin number

Pin name

(function

after reset)

Notes

Pin functions

Alternate functions Additional functions

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