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About U-boot for SD boot

echo yang
Intellectual 730 points

hi,

I'm a newbie using the dm8168evm.Here I don't understand the sentence below in "TI816x-PSP-04.00.00.10-U-Boot.pdf" under PSP.

ROM boot loader for SD Boot limits the (FAT32/VFAT) file size of the loader binary to max of 128K.

But in the "TMS320DM816x DaVinci Digital Media Processors Technical Reference Manual",I can't find anything about the limitation of 128K in the FAT mode.

Instead in the RAW mode it shows that

In raw mode the booting image can be located at one of the four consecutive locations in the main area: offset 0/20000h (128KB)/40000h (256KB)/60000h (384KB). For this reason a booting image shall not exceed 128KB in size.
So I can't understand if it is still suitable to the FAT mode,because the SD card I get is FAT mode.

Thanks.