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求助!DSP6416不能正常访问部分SDRAM地址空间!



我用DSP6416 emifa 连接了4片2M X 16bit X 4bank 的SDRAM.

最近调试出现如下问题:基地址80000000连续访问2M(200000)地址,读写均正常;可是2M以后地址读写均失败,

只有地址为81000000后,再读写2M地址又正常。

这个现象很稳定,地址从80000000开始,每次要间隔16M 才能连续读写2M X 32bit数据,电路设计参考Dsk6416开发版,应该不错。

请问各位,可能是哪里出问题了呢?谢谢!