STM32U5A5QJ datasheet(62/382 Pages) STMICROELECTRONICS

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Functional overview

STM32U5Axxx

62/382

DS13543 Rev 1

The main features of the FSMC are the following:

•

Interface with static-memory mapped devices including:

–

Static random access memory (SRAM)

–

NOR flash memory/OneNAND flash memory

–

PSRAM (four memory banks)

–

NAND flash memory with ECC hardware to check up to 8 Kbytes of data

–

Ferroelectric RAM (FRAM)

•

8-,16- bit data bus width

•

Independent chip select control for each memory bank

•

Independent configuration for each memory bank

•

Write FIFO

3.26.1

LCD parallel interface

The FSMC can be configured to interface seamlessly with most graphic LCD controllers. It

supports the Intel® 8080 and Motorola® 6800 modes, and is flexible enough to adapt to

specific LCD interfaces.

This LCD parallel interface capability makes it easy to build cost effective graphic

applications using LCD modules with embedded controllers or high-performance solutions

using external controllers with dedicated acceleration.

3.26.2

FSMC TrustZone security

When the TrustZone security is enabled, the whole FSMC banks are secure after reset.

Nonsecure area can be configured using the TZSC MPCWMx controller:

•

FSMC NOR/PSRAM bank:

–

Up to two nonsecure area can be configured thought the TZSC MPCWM2

controller with a 64-Kbyte granularity

•

FSMC NAND bank:

–

Can be either configured as fully secure or fully nonsecure using the TZSC

MPCWM3 controller

The FSMC registers can be configured as secure through the TZSC controller.

3.27

Octo-SPI interface (OCTOSPI)

The devices embed two OCTOSPIs. The OCTOSPI supports most external serial memories

such as serial PSRAMs, serial NAND and serial NOR Flash memories, HyperRAMs™ and

HyperFlash™ memories, with the following functional modes:

•

Indirect mode: all the operations are performed using the OCTOSPI registers.

•

Status-polling mode: the external memory status register is periodically read and

an interrupt can be generated in case of flag setting.

•

Memory-mapped mode: the external memory is memory mapped and is seen by the

system as if it were an internal memory supporting read and write operation.

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