DocID024597 Rev 5 417/1830
RM0351 Flexible static memory controller (FSMC)
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At startup the FMC pins must be configured by the user application. The FMC I/O pins which
are not used by the application can be used for other purposes.
The FMC registers that define the external device type and associated characteristics are
usually set at boot time and do not change until the next reset or power-up. However, the
settings can be changed at any time.
16.2 Block diagram
The FMC consists of the following main blocks:
• The AHB interface (including the FMC configuration registers)
• The NOR Flash/PSRAM/SRAM controller
• The external device interface
• The NAND Flash controller
The block diagram is shown in the figure below.
Figure 36. FMC block diagram
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