DocID027299 Rev 1

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TN1201

Hardware migration

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Hardware migration

The STM32L15/6xxD and STM32L15/6xVD-X devices are produced in the same packages

and are pin-to-pin compatible except for WLCSP packages. All common peripherals share

the same pins.

The FSMC and SDIO and OPAMP3 peripherals are not present in STM32L15/6xVD-X

devices. In case FSMC or SDIO or the OPAMP3 were used in STM32L15/6xxD and are no

longer needed in the STM32L15/6xVD-X-based new design, some hardware changes are

needed when migrating from STM32L15/6xxD to STM32L15/6xVD-X devices.

In case FSMC or SDIO or OPAMP3 peripheral were not used in STM32L15/6xxD hardware

design, the transition from the STM32L15/6xxD device to the STM32L15/6xVD-X device is

simple. The device can be replaced without any hardware change on the application PCB

(except for WLCSP).

In case of moving from WLCSP64 to WLCSP104 there is of course a hardware redesign

needed.