你好 我想问下EMIF共有24根地址线,16根数据线。在data manual上看到CE0-4每个空间的大小都是64MB,那么请问这个64MB是怎么计算出来的?
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你好 我想问下EMIF共有24根地址线,16根数据线。在data manual上看到CE0-4每个空间的大小都是64MB,那么请问这个64MB是怎么计算出来的?
64M是预留空间,因为EMIF16最大只能接16bit memory,所以实际最大只能访问32MByte:(2^24)x2=32MB.。数据手册底下有备注“32MB per chip select for 16-bit NOR and SRAM. 16MB per chip select for 8-bit NOR and SRAM.”