Block Diagram; Figure 403. Fsmc Block Diagram - ST STM32F40 Series Reference Manual

RM0090
The FSMC 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, it is
possible to change the settings at any time.
32.2

Block diagram

The FSMC consists of four main blocks:
●
The AHB interface (including the FSMC configuration registers)
●
The NOR Flash/PSRAM controller
●
The NAND Flash/PC Card controller
●
The external device interface
The block diagram is shown in

Figure 403. FSMC block diagram

From clock
controller
HCLK
Figure
FSMC interrupt to NVIC
Configuration
registers
Doc ID 018909 Rev 4
Flexible static memory controller (FSMC)
403.
NOR/PSRAM
memory
controller
NAND/PC Card
memory
controller
FSMC_NE[4:1]
FSMC_NL (or NADV)
FSMC_NBL[1:0]
FSMC_CLK
FSMC_A[25:0]
FSMC_D[15:0]
FSMC_NOE
FSMC_NWE
FSMC_NWAIT
FSMC_NCE[3:2]
FSMC_INT[3:2]
FSMC_INTR
FSMC_NCE4_1
FSMC_NCE4_2
FSMC_NIORD
FSMC_NIOWR
FSMC_NREG
FSMC_CD
NOR/PSRAM
signals
Shared
signals
NAND
signals
PC Card
signals
ai15591b
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