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关于TMS320F28377的EMIF连接SDRAM的问题

如上图所示:手册中说:连接SDRAM时,行地址线数量为8,9,10,11,列地址线数量为13,14,15,16,,,这样的话每个bank最小为(2^13)×(2^8)=2M,那么问题来了,镁光的MT48LC4M16A2P,,,只有12跟地址线,,岂不是不兼容EMIF吗?因为列地址线至少13跟啊,,,