【单选题】【消耗次数：1】
8051单片机的并行I/O接口P3有第二功能，其中P3.7的第二功能是\*MERGEFORMAT,其作用是的读选通信号输出。
①
程序存储器
②
SFR
③
内部数据存储器
④
外部数据存储器
参考答案：
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相关题目
【单选题】
关于8051单片机的存储器，下列表述中，错误的是。
①
程序存储器是存放程序的，不能存放数据。
②
内部数据存储器的单元地址是一个8位二进制数。
③
外部数据存储器的容量是64KB。
④
特殊功能寄存器通常是用于对各种功能电路进行控制和管理的。
【单选题】
存储器分为内存储器和外存储器两类，下列哪种说法正确？
①
它们中的数据均可被CPU直接调用
②
其中只有外存储器中的数据可被CPU直接调用
③
它们中的数据均不能被CPU直接调用
④
其中只有内存储器中的数据可被CPU直接调用
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