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TF卡启动异常

Other Parts Discussed in Thread: AM3358

各位好,现在碰到的问题是会有极小部分(小于1%)的TF卡在自制的电路板(电路板用的AM3358,硬件参照BBB修改,SDK为TI SDK6.0)上无法启动,上电后调试串口无任何输出,换到其它电路板上也无法运行,但是这部分TF卡用读卡器插入Windows PC上可正常读写。

请问可能是什么问题?