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关于TMS320F28377D的EMIF地址线扩充的问题

上图是手册上,关于地址线扩充的方案,我在实际使用中用:512Mb的FLASH,所以地址用了EM1BA1,EM1A【11:0】,及GPIO;EM1BA1,EM1A【11:0】的地址是ADR【12:0】GPIO的地址是ADR【24:13】,关键问题是我怎么用EMIF控制器去访问这片地址ADR【24:0】,EMIF控制器怎么去对GPIO组成的地址线进行操作呢?求教TI