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AN3422 Datasheet(PDF) 6 Page - STMicroelectronics

Part # AN3422
Description  Migration of microcontroller applications from STM32F1 to STM32L1 series
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3422 Datasheet(HTML) 6 Page - STMicroelectronics

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STM32L1 family overview
AN3422
6/52
Doc ID 018976 Rev 2
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
Yes
Yes
No I2S in L1 Medium-density
series
WWDG
Yes
Yes
Yes
Same features
IWDG
Yes
Yes
Yes
Same features
DBGMCU
Yes
Yes
Yes
Same features
CRC
Yes
Yes
Yes
Same features
EXTI
Yes
Yes
Yes
Same features
USB FS Device Yes
Yes
Yes
Same features
DMA
Yes
Yes
Yes
Same features
TIM
Yes
Yes
Yes
Same features
SDIO
No
No
Yes
Same features
FSMC
No
No
Yes
Same features
PWR
Yes
Yes
Yes
Same features
RCC
Yes
Yes
Yes
Same features
USART
Yes
Yes
Yes
Same features (UART4/5 are
available only on High-density)


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