STM32L021D4 datasheet(11/114 Pages) STMICROELECTRONICS

Part #	STM32L021D4

Description	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%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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STM32L021x4

Description

2.1

Device overview

Table 1. Ultra-low-power STM32L021x4 device features and peripheral counts

Peripheral

STM32 L021D4 STM32 L021F4 STM32 L021G4 STM32L021K4

Flash (Kbytes)

Data EEPROM (bytes)

512

RAM (Kbytes)

AES

Timers

General-

purpose

LPTIM

RTC/SYSTICK/IWDG/

WWDG

1/1/1/1

Communication

interfaces

SPI

I2C

USART

LPUART

GPIOs

26/28(1)

Clocks: HSE(2)/LSE/HSI/MSI/LSI

1/1/1/1/1

12-bit synchronized ADC

Number of channels

7/9(3)

Comparators

Max. CPU frequency

32 MHz

Operating voltage

1.8 V to 3.6 V (down to 1.65 V at power-down) with BOR option

1.65 V to 3.6 V without BOR option

Operating temperatures

Ambient temperature: –40 to +125 °C

Junction temperature: –40 to +130 °C

Packages

TSSOP14

TSSOP20,

UFQFPN20

UFQFPN28

LQFP32,

UFQFPN32

1. The devices feature 26 and 28 GPIOs on LQFP32 and UFQFPN32, respectively.

2. HSE available only as external clock input (HSE bypass).

3. The devices feature 7 and 9 ADC channels on UFQFPN20 and TSSOP20, respectively.

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