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6678 DDR 初始化错误是PCB 走线的问题吗



在6678上运行:KeyStone_DDR_init (66.66667, 20, 1, NULL)的时候,输出:DDR3 leveling has failed, STATUS = 0x40000064。

我现在用的是TI自己的6678L评估板,看以前论坛里面相似的问题说是由于不同的板子走线的问题,所以初始化函数里面有些参数要适当修改,请问具体应该修改哪一个参数呢?