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主机PC枚举C6678



各位好!

        目前遇到了一个棘手的问题:C6678无法被主机PC枚举到!

       C6678是参考EVM设计的板卡,采用的是PCIE boot mode。当板卡插入主机(Windows XP)的时候,PC扫描不到该板卡,通过仿真器观察到LTSSM_EN=1,而LTSSM_STATE为0x00。

       不知道各位有没有遇到过类似的问题?希望大牛可以帮忙~