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nand flash的ECC: uncorrectable问题

大家好,

     我们参照了APPro DM8127的开发板设计,软件版本为DM8127_IPNC_3.80.00。在我们板中nand falsh 使用的是S34ML01G200TFI000,8位宽度。在u-boot中对nand falsh进行读写,擦除和写均正常,但是读的时候有“ECC: uncorrectable”,但是比较读出来的数据又是正常的,选择的是HW ECC BCH8。请问,问题出现是在哪里?