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F28M36P63C2: C28核如何访问EPI接口内存的地址

Part Number: F28M36P63C2

你好,请问一下M3能够正常访问EPI接口的内存,地址线为A0~A19,请问C28如何才能访问同样的内存地址范围?如图中所示,即便我的M3可访问地址为A0~A19,C28也只能访问A0~A17的范围(这个跟硬件连接有关系吗?也就是说我的M3硬件EPI接口的芯片的地址线也必须为A0~A17)?非常感谢!