单片机常用指令.pdf

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1、常用单片机汇编指令：1 MOV A,Rn寄存器内容送入累加器2MOV A,direct直接地址单元中的数据送入累加器3MOV A,Ri间接 RAM中的数据送入累加器4MOV A,#data 立即数送入累加器5MOV Rn,A 累加器内容送入寄存器6MOV Rn,direct 直接地址单元中的数据送入寄存器7MOV Rn,#data 立即数送入寄存器8MOV direct,A累加器内容送入直接地址单元9MOV direct,Rn 寄存器内容送入直接地址单元10 MOV direct,direct直接地址单元中的数据送入另一个直接地址单元11 MOV direct,Ri 间接 RAM中的数据送入直

2、接地址单元12 MOV direct,#data 立即数送入直接地址单元13 MOV Ri,A 累加器内容送间接RAM单元14 MOV Ri,direct直接地址单元数据送入间接RAM单元15 MOV RI,#data 立即数送入间接RAM单元16 MOV DRTR,#dat16 16 位立即数送入地址寄存器17 MOVC A,A+DPTR以 DPTR 为基地址变址寻址单元中的数据送入累加器18 MOVC A,A+PC以 PC 为基地址变址寻址单元中的数据送入累加器19 MOVX A,Ri外部 RAM（8 位地址）送入累加器20 MOVX A,DPTR外部 RAM（16 位地址）送入累加器21

3、 MOVXRi,A累计器送外部RAM（8 位地址）22 MOVXDPTR,A 累计器送外部RAM（16 位地址）23 PUSH direct 直接地址单元中的数据压入堆栈24 POP direct 弹栈送直接地址单元25 XCH A,Rn 寄存器与累加器交换26 XCH A,direct直接地址单元与累加器交换27 XCH A,Ri 间接 RAM与累加器交换8XCHD A,Ri间接 RAM的低半字节与累加器交换算术操作类指令：1ADD A,Rn 寄存器内容加到累加器2ADD A,direct直接地址单元的内容加到累加器3ADD A,Ri间接 ROM的内容加到累加器4ADD A,#data 立即

4、数加到累加器5ADDC A,Rn 寄存器内容带进位加到累加器6ADDC A,direct直接地址单元的内容带进位加到累加器7ADDC A,Ri间接 ROM的内容带进位加到累加器8ADDC A,#data 立即数带进位加到累加器9SUBB A,Rn 累加器带借位减寄存器内容10 SUBB A,direct累加器带借位减直接地址单元的内容11 SUBB A,Ri累加器带借位减间接RAM中的内容12 SUBB A,#data 累加器带借位减立即数13 INC A 累加器加 114 INC Rn 寄存器加115 INC direct 直接地址单元加116 INC Ri 间接 RAM单元加 117 DE

5、C A 累加器减118 DEC Rn 寄存器减1 1 1219 DEC direct 直接地址单元减120 DEC Rj 间接 RAM单元减121 INC DPTR 地址寄存器DPTR 加 122 MUL AB A 乘以 B，结果放在A23 DIV AB A 除以 B，结果放在A24 DA A 累加器十进制调整布尔变量操作类指令：1CLR C 清进位位2CLR bit 清直接地址位3SETB C 置进位位4SETB bit 置直接地址位5CPL C 进位位求反6CPL bit 置直接地址位求反7ANL C,bit进位位和直接地址位相“与”8ANL C,bit进位位和直接地址位的反码相“与”9O

6、RL C,bit进位位和直接地址位相“或”10 ORL C,bit 进位位和直接地址位的反码相“或”11 MOV C,bit 直接地址位送入进位位12 MOV bit,C 进位位送入直接地址位13 JC rel 进位位为1 则转移14 JNC rel 进位位为 0 则转移15 JB bit,rel 直接地址位为1 则转移16 JNB bit,rel直接地址位为0 则转移17 JBC bit,rel直接地址位为1 则转移，该位清零逻辑操作数指令：1ANL A,Rn 累加器与寄存器相“与”2ANL A,direct累加器与直接地址单元相“与”3ANL A,Ri累加器与间接RAM单元相“与”4ANL

7、 A,#data 累加器与立即数相“与”5ANL direct,A直接地址单元与累加器相“与”6ANL direct,#data 直接地址单元与立即数相“与”7ORL A,Rn 累加器与寄存器相“或”8ORL A,direct累加器与直接地址单元相“或”9ORL A,Ri累加器与间接RAM单元单元相“或”10 ORL A,#data 累加器与立即数相“或”11 ORL direct,A直接地址单元与累加器相“或”12 ORL direct,#data 直接地址单元与立即数相“或”文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y

8、5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W

9、6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B

10、10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8

11、Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2

12、L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码

13、:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z

14、3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L313 XRL A,Rn 累加器与寄存器相“异或”14 XRL A,direct累加器与直接地址单元相“异或”15 XRL A,Ri 累加器与间接RAM单元单元相“异或”16 XRL A,#data 累加器与立即数相“异或”17 XRL direct,A直接地址单元与累加器相“异或”1

15、8 XRL direct,#data 直接地址单元与立即数相“异或”19 CLR A 累加器清“0”20 CPL A 累加器求反21 RL A 累加器循环左移22 RLC A 累加器带进位位循环左移23 RR A 累加器循环右移24 RRC A 累加器带进位位循环右移25 SWAP A 累加器半字节交换控制转移类指令：1ACALL addr11 绝对（短）调用子程序2LCALLaddr16 长调用子程序3RET子程序返回4RETI中数返回5AJMP addr11 绝对（短）转移6LJMP addr16 长转移7SJMP rel 相对转移8JMP A+DPTR相对于 DPTR 的间接转移9JZ

16、rel 累加器为零转移10 CJNE rel 累加器非零转移11 CJNE A,direct,rel累加器与直接地址单元比较，不相等则转移12 CJNE A,#data,rel 累加器与立即数比较，不相等则转移13 CJNE Rn,#data,rel 寄存器与立即数比较，不相等则转移14 CJNE Ri,#data,rel间接 RAM单元与立即数比较，不相等则转移15 DJNZ Rn,rel 寄存器减 1，非零转移16 DJNZ direct,erl 直接地址单元减1，非零转移17 NOP 空操作MOMOV V 指令表示单片机内部的寄存器或者存储器之间相互传递数据,而 MOVMOVX X 则表

17、示单片机内部的 A 累加器与片外的数据存储器传送数据.还有两条是MOVC的指令,它们表示A 向ROM(程序存储器)读取数据,因为程序存储器是固定的不可以写的,所以,A 只能读数据,却不能向它写数据.换句 话说 MOVX 和 MOVC 是针对两种不同的存储器而言,一个是数据存储器,另一个却是程序存储器.文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6

18、X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B1

19、0 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y

20、3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L

21、3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:

22、CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3

23、C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5

24、 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L31MCS51 单片机引脚信号中，信号名称带上划线的表示该信号或 有效。2通过堆栈操作实现子程序调用，首先要把的内容入栈，以进行断点保护。调用返回时再进行出栈操作，把保护的断点送回。3某程序初始化时使（SP）=40H，则此堆栈地址范围为，若使（SP）=50H，则此堆栈深度为。4在相对寻址方式中，“相对”两字是指相对于，寻址得到的结果是。在寄存器寻址方式中，指令中指定寄存器的内容就是。在变址寻址方式中，以作变址寄存器，以或 作基址寄存器。5假定累加器（A）=49H，

25、执行指令：201AH：MOVC A，A+PC后，送入 A 的是程序存储器单元的内容。6若（DPTR）=5306H，（A）=49H，执行下列指令：MOVC A，A+DPTR后，送入 A 的是程序存储器单元的内容。7假定（SP）=45H，（ACC）=46H，（B）=47H，执行下列指令：PUSH ACCPUSH B后，（SP）=，（46H）=，（47H）=。8假定（SP）=47H，（46H）=46H，（47H）=47H。执行下列指令：POPDPHPOPDPL后，（DPTR）=，（SP）=。9若（A）=56H，（R0）=56H，（56H）=56H。执行指令：ADD A，R0后，（A）=，（CY）=，

26、（AC）=，（OV）=。10若（A）=0FFH，（R0）=46H，（46H）=0FFH，（CY）=1。执行指令：ADDC A，R0后，（A）=，（CY）=，（AC）=，（OV）=。11假定（A）=45H，（B）=67H。执行指令：MUL AB后，寄存器（B）=，累加器（A）=，（CY）=，（OV）=。12假定（A）=0FCH，（B）=35H。执行指令：DIV AB后，累加器（A）=，寄存器（B）=，（CY）=，（OV）=。13执行如下指令序列：MOV C，P1.0ANL C，P1.1OR C，/P1.2MOV P1.3，C后，所实现的逻辑运算式为。14假定 addr11=00100011001

27、B,标号 MN 的地址为 2099H。执行指令：MN：AJMP addr11后，程序转移到地址去执行。15假定标号MN 的地址为 2000H，标号 XY 值为 2022H。应执行指令：文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2

28、L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码

29、:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z

30、3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y

31、5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W

32、6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B

33、10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8

34、Y3J2J2L3MN：SJMP XY该指令的相对偏移量为。16累加器A中存放着一个其值小于63 的 8 位无符号数，CY清“0”后执行指令：RLC ARLC A则 A 中数变为原来的倍。17在 MCS51 单片机系统中，采用的编址方式是。MCS51 可提供和 两种存储器，其编址方式为，扩展后其最大存储空间分别为和。对 80C51 而言，片内 ROM 和片外 ROM 的编址方式为，片外 ROM 的地址从开始；片内RAM 和片外 RAM 的编址方式为，片外 RAM 的地址从开始。18 为实现内外程序存储器的衔接，应使用信号进行控制，对 8031，EA=，CPU对 进行寻址；对 80C51，EA=1

35、，CPU对 寻址。19访问内部RAM 使用 指令，访问外部RAM 使用指令，访问内部ROM 使用 指令，访问外部ROM 使用 指令。20当计数器产生记数溢出时，定时器/记数器的 TF0（TF1）位=。对记数溢出的处理，在中断方式时，该位作为位使用；在查询方式时，该位作为位使用。21在定时器工作方式0 下，计数器的宽度为位，其记数范围为，如果系统晶振频率为6MHZ，则最大定时时间为。22利用定时器/计数器产生中断时，应把定时器/计数器设置成工作状态，当计数器设置成方式0 时，记数初值应为；设置成方式1 时，记数初值应为；设置成方式2 或方式 3 时，记数初值应为。23对单片机而言，连接到数据总线

36、上的输出口应具有功能，连接到数据总线上的输入口应具有功能。24在多位LED 显示器接口电路的控制信号中，必不可少的是控信号和控信号。25与 8255 比较，8155 的功能有所增强，主要表现在8155 具有 单元的和一个位的。26单片机实现数据通讯时，其数据传送方式有和 两种。串行数据传送方式分为和 两种。27专用寄存器“串行发送数据缓冲寄存器”，实际上是寄存器和寄存器的总称。28在串行通讯中，若发送方的波特率为1200bps，则接收方的波特率为。29D/A 转换电路之前必须设置数据锁存器，这是因为。30对于由8031 构成的单片机应用系统，EA 脚应接，中断响应并自动生成长调用指令LCALL

37、 后，应转向 去执行中断服务程序。单选题：180C51 与 8031 的区别在于内部 ROM 的容量不同内部 RAM 的容量不同内部 ROM 的类型不同80C51 使用 EEPROM，而 8031 使用 EPROM2PC的值是A当前指令前一条指令的地址B当前正在执行指令的地址C下一条指令的地址D控制器中指令寄存器的地址3假定（SP）=37H，在进行子程序调用时把累加器A 和断点地址进栈保护后，SP的值为A3AH B38H C39H D40H4在 80C51 中，可使用的堆栈最大深度为A80 个单元B32 个单元C128 个单元D8 个单元5在相对寻址方式中，寻址的结果体现在文档编码:CM10Z

38、3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y

39、5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W

40、6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B

41、10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8

42、Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2

43、L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码

44、:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3APC中 B累加器A中CDPTR 中 D某个存储单元中6在寄存器间接寻址方式中，指定寄存器中存放的是A操作数B操作数地址C转移地址D地址偏移量7执行返回指令时，返回的断点是A调用指令的首地

45、址B调用指令的末地址C返回指令的末地址D调用指令下一条指令的首地址8可以为访问程序存储器提供或构成地址的有A只有程序计数器PCB只有 PC和累加器AC只有 PC、A 和数据指针DPTRDPC、A、DPTR 和堆栈指针SP9若原来工作寄存器0 组为当前寄存器组，现要改2 组为当前寄存器组，不能使用指令ASETB PSW.3 BSETB D0H.4CMOV D0H，#10H DCPL PSW.410执行以下程序段MOV SP，#40HMOV B，#30HMOV A，#20HPUSH BPUSH ACCPOPBPOPACC后，B 和 A 的内容分别为A20H，30H B30H，20HC40H，30H

46、 D40H，20H11执行以下程序段MOV R0，#70HMOV A，R0RL AMOV R1，ARL ARL AADD A，R1MOV R0，A后，实现的功能是A把立即数70H 循环左移 3 次 B把立即数70H 10C把 70H 单元的内容循环左移3 次 D把 70H 单元的内容 1012下列叙述中，不属于单片机存储器系统特点的是A扩展程序存储器与片内程序存储器存储空间重叠B扩展数据存储器与片内数据存储器存储空间重叠C程序和数据两种类型的存储器同时存在D芯片内外存储器同时存在文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y

47、5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W

48、6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B

49、10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8

50、Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2L3文档编码:CM10Z3C5L3Y5 HT2W6X6P8B10 ZN8Y3J2J2