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am335x ddr3地址线的问题



使用两片512MB的ddr3,

寄存器REG_IBANK_POS=3,reg_rowsize=7(16位row地址线),reg_ibank=3(8个bank),reg_ebank=0,reg_pagesize=2(1k)

现在每次让row地址线A9=1的时候,ddr读写测试就会出现错误。如下图从0x80080000,写入0x80000个字节,出错,但是如果从80100000处写入0x80000个字节就没问题,测了测板子上地址线的阻抗都是一样的,现在不知道怎么确定问题出在哪?

求指导,已经卡了好多天啦!