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368 DVR 串口启动



自己做了一套DM368 DVR板,调试的时候用串口启动方式出现如图情况,请问各位高手 是硬件问题吗?如果是的话,可以告诉我大概是哪块有问题,之前用NAND启动,可以用CCS烧写,但是烧写完成后不能够启动。