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关于AM437X从EMMC0启动的问题

Other Parts Discussed in Thread: AM4378

自己做的板卡,EMMC已烧录完成(emmc芯片通过mmc0接口连接AM4378),当采用MMC1<USB1<USB0<MMC0启动时,系统能够起动,lcd屏幕能够显示相关数据;当把BOOT Sequence改为MMC0<USB1<USB0<NAND_I2C时发现系统无法启动,lcd屏幕没有显示相关数据;也尝试了MMC0<USB1<USB0<SPI的boot顺序,发现系统也还是启动不了,请问为什么会出现这种情况?是哪里配置有问题吗?