【单选题】【消耗次数：1】
MCS-51单片机片外RAM地址空间与片内RAM地址空间在地址的低端0000H一007FH是（）。
①
重叠
②
不重叠
③
部分重叠
④
不定
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【简答题】
MCS-51单片机内部RAM功能结构如何分配？位寻址区域的字节地址范围是多少？
【简答题】
MCS-52单片机片内共有[填空1]字节单元的RAM。
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