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UM0851 bảng dữ liệu(PDF) 124 Page - STMicroelectronics

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UM0851 bảng dữ liệu(HTML) 124 Page - STMicroelectronics

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Non-volatile memory device drivers
UM0851
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Doc ID 16604 Rev 2
Figure 31.
Interface between FSMC and NAND Flash
5.1.2
Software overview
The NAND device driver sits on top of the FSMC and provides all the necessary functions
for a file system via the standard Linux MTD interface. NAND device driver controls the
functionality of FSMC by using the API of FSMC driver.
Figure 32.
NAND software system architecture
Once started, the NAND device driver scans for the available NAND chips and if a chip is
found and matches to its list of devices, the device driver configure it. After the initial
configuration, the NAND Flash information regarding the NAND Flash is exported to the
MTD layer and the Flash is ready to be used by the file system.
FSMC
AHB
NAND Flash
AHB
Interface
Chip Select
Data,
Address,
Control
Bus
FSMC Wait
Ready/Busy
NOR driver
NAND driver
Linux MTD layer
YAFFS2
JFFS2
VFS
FSMC
SMI
controller
Application
User space
Kernel space
Hardware
NAND
Flash



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