Peripheral migration

TN1201

8/13

DocID027299 Rev 1

3.1

Main peripherals/system changes

Some system properties and peripherals configuration are changed in the

STM32L15/6xVD-X device. The following sections describe these changes.

3.1.1

Memory space increase

The memory areas are increased in the STM32L15/6xVD-X device as follows:

•

RAM: from 48 KB to 80 KB

•

EEPROM: from 12 KB to 16 KB

The memory increases permit to use STM32L15/6xVD-X device in more complex

applications.

3.1.2

FSMC removal

The flexible static memory controller (FSMC) is not present in the STM32L15/6xVD-X

device. The software and hardware must be adapted when migrating to STM32L15/6xVD-X

device in case the FSMC peripheral is used in the hardware design using the

STM32L15/6xxD device.

3.1.3

SDIO removal

The secure digital input/output interface (SDIO) is not present in the STM32L15/6xVD-X

device. The software and hardware must be adapted when migrating to STM32L15/6xVD-X

device in case the SDIO peripheral is used in the hardware design using the

STM32L15/6xxD device.

3.1.4

OPAMP3 removal

One operational amplifier (OPAMP3) is not present in the STM32L15/6xVD-X device. The

software and hardware must be adapted when migrating to STM32L15/6xVD-X device in

case the OPAMP3 peripheral is used in the hardware design using the STM32L15/6xxD

device.

3.2

Device limitation changes/updates

The errata sheet on STM32L15/6xVD-X devices is available on the company website at

solved, while other limitations have been introduced. This section describes the changes in

the device limitations.

Please refer to STM32L15/6xxD errata sheet and STM32L15/6xVD-X errata sheet for

details on the device limitations.

3.2.1

STM32L15/6xxD specific limitations

The following limitations that apply to STM32L15/6xxD devices do not apply to

STM32L15/6xVD-X devices:

•

Missing analog switch on GPIO PC10,

•

Pull-up on PB7 when configured in analog mode,

•

Debugging Stop mode with WFE entry.