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AM335X ddr和nand最大配置的问题



am335x TRM

block name            start_address         end_address              size           description
GPMC                    0x0000_0000      0x1FFF_FFF                 512MB          External Memory
RESERVED         0x2000_0000      0x3FFF_FFF                 512MB           RESERVED


EMIF0 SDRAM    0x8000_0000       0xBFFF_FFFF            1GB              External Memory
RESERVED        0xC000_0000       0xFFFF_FFF              1GB              RESERVED

请问:AM335X最大支持的GPMC(NAND)是512MB,DDR最大支持1GB么?

reserved区域是否能被用做GMPC区域和DDR区域呢,换句话说,能否支持1GB的NAND和2GB ddr?

另外,176KB的BOOTROM装的是TI出厂默认的程序,上电首先支持此处的程序,再执行uboot么?

谢谢