[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fYdnLotNw9K-SQ9YXptM6CfXqXTWXsCXl17GpuWXKK_I":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":20,"type":9},[],"2023-06-19 17:53:49",72020498,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},4,"5e78ab6a551929327a944379e8ccebcc","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","计算机组成原理","work_26948495","2023存储器目标2","DRAM电容上的电荷一般只能维持1-2ms,所以每隔2ms必须刷新一次,常用的刷新方式有哪些",[17,21,26,32],{"answer":18,"createTime":5,"id":6,"options":19,"question":15,"source":20,"type":9},[],[],"v1",{"answer":22,"createTime":5,"id":23,"options":24,"question":25,"source":20,"type":9},[],72020499,[],"若某存储器存储周期为250ns,每次读出16位,该存储器的数据传输率是多少",{"answer":27,"createTime":5,"id":28,"options":29,"question":30,"source":20,"type":31},[],72020500,[],"一个采用直接映射方式的16KB缓存,假设块长为8个32位的字,按字节编址,则地址为FDA459H的主存单元映射到缓存的第几块内(十进制表示)",7,{"answer":33,"createTime":5,"id":34,"options":35,"question":36,"source":20,"type":31},[],72020501,[],"设CPU共有16根地址线,8根数据线,并用MREQ作为访存控制信号(低电平有效),用WR作为读\u002F写控制信号(高电平为读,低电平为写).现有下列存储芯片:1K×4位RAM,4K×8位RAM,2K×8位ROM以及74138译码器和各种门电路,如下图所示.画出CPU与存储芯片的连接图, \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F84bf4256c3b4e7317c933d87adfdb0cf.png\"> 要求: (1)主存地址空间分配:8000H~87FFH为系统程序区;8800H~8BFFH为用户程序区.(20分) (2)合理选用上述存储芯片,说明各选几片.(10分) (3)详细画出存储芯片与CPU的连接图."]