s3c2440 primary boot from nand flash

最新推荐文章于 2024-02-01 11:52:14 发布

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S3C2440A可通过外部NAND闪存进行启动，为此内置了名为‘Steppingstone’的SRAM缓冲区。启动时，NAND闪存的前4KB将加载到Steppingstone中并执行启动代码。通常，启动代码会将NAND闪存的内容复制到SDRAM中，并使用硬件ECC检查数据的有效性。

S3C2440A boot code can be executed on an external NAND flash memory. In order to support NAND flash boot
loader, the S3C2440A is equipped with an internal SRAM buffer called ‘Steppingstone’. When booting, the first 4
KBytes of the NAND flash memory will be loaded into Steppingstone and the boot code loaded into Steppingstone
will be executed.
Generally, the boot code will copy NAND flash content to SDRAM. Using hardware ECC, the NAND flash data
validity will be checked. Upon the completion of the copy, the main program will be executed on the SDRAM.