目前调试了5块板子都是这样的情况8535.mc_w300_f0_v2_0-0323.pdf
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已解决,是PCB设计上把SDRAM上的一个数据线和铺铜地短路,导致一直SDRAM数据通讯异常,所以加载不进去,目前手动将短路割断后,能够正常工作了