AN3422 datasheet(6/52 Pages) STMICROELECTRONICS

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STM32L1 family overview

AN3422

6/52

Doc ID 018976 Rev 2

STM32L1 family overview

The STM32L1 platform forms a strong foundation with a broad and growing portfolio. With

new products addressing new applications, the complete STM32L product series now

comprises three series, STM32L1 Medium-density, STM32L1 Medium-density+ and

STM32L1 High-density, all dedicated to ultra low power and low voltage applications.

●

STM32L1: Designed for ultra-low-power applications that are energy-aware and seek

to achieve the absolute lowest power consumption. The L1 series maintains

compatibility with the F1 series.

–

Medium-density devices are STM32L151xx and STM32L152xx microcontrollers

where the Flash memory density ranges between 64 and 128 Kbyte

–

Medium-density+ devices are STM32L151xx, STM32L152xx and STM32L162xx

microcontrollers where the Flash memory density is 256 Kbyte

–

High-density devices are STM32L151xx, STM32L152xx and STM32L162xx

microcontrollers where the Flash memory density is 384 Kbyte

The ultralow power STM32L1 Medium-density, STM32L1 Medium-density+ and STM32L1

High-density are fully pin-to-pin, software and feature compatible.

Table 1.

STM32L1 peripherals compatibility analysis

Peripheral

Medium-

density

Medium-

density+

High-

density

Compatibility

Comments

SPI

Yes

No I2S in L1 Medium-density

series

WWDG

Yes

Same features

IWDG

Yes

Same features

DBGMCU

Yes

Same features

CRC

Yes

Same features

EXTI

Yes

Same features

USB FS Device Yes

Yes

Same features

DMA

Yes

Same features

TIM

Yes

Same features

SDIO

Yes

Same features

FSMC

Yes

Same features

PWR

Yes

Same features

RCC

Yes

Same features

USART

Yes

Same features (UART4/5 are

available only on High-density)

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