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DSP6748 EMIFA外接FPGA,使用CS4,映射地址0x64000000-0x65FFFFFF出现错误

EMIFA外接FPGA,使用CS4,映射地址0x64000000-0x65FFFFFF

写0x65000000以后地址时出现错误,如在0x65001000地址写0x12345678  ,地址0x64001000上也被写了0x12345678

0x65000000-0x65FFFFFF与0x64000000-0x64FFFFFF地址冲突了,两个地址值一样了。

C代码没有变化,变化的是采购了两批DSP6748芯片,旧的芯片可以,新采购的芯片出现此问题。

求教可能什么原因导致?