求单片机习题答案,五、分析程序并写出结果:(每题5分,1、已知(R0)=20H,(20H ) =10H,(P0) =30H,(R2) =20H,执行如下程序段后( 40H ) =MOV @R0 ,#11HMOV A ,R2ADD A ,20HMOV PSW ,#80HSUBB A ,P0XRL A ,#45HMOV 40H ,A2、已知
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![求单片机习题答案,五、分析程序并写出结果:(每题5分,1、已知(R0)=20H,(20H ) =10H,(P0) =30H,(R2) =20H,执行如下程序段后( 40H ) =MOV @R0 ,#11HMOV A ,R2ADD A ,20HMOV PSW ,#80HSUBB A ,P0XRL A ,#45HMOV 40H ,A2、已知](/uploads/image/z/14317508-20-8.jpg?t=%E6%B1%82%E5%8D%95%E7%89%87%E6%9C%BA%E4%B9%A0%E9%A2%98%E7%AD%94%E6%A1%88%2C%E4%BA%94%E3%80%81%E5%88%86%E6%9E%90%E7%A8%8B%E5%BA%8F%E5%B9%B6%E5%86%99%E5%87%BA%E7%BB%93%E6%9E%9C%EF%BC%9A%EF%BC%88%E6%AF%8F%E9%A2%985%E5%88%86%2C1%E3%80%81%E5%B7%B2%E7%9F%A5%EF%BC%88R0%EF%BC%89%3D20H%2C%2820H+%29+%3D10H%2C%28P0%29+%3D30H%2C%28R2%29+%3D20H%2C%E6%89%A7%E8%A1%8C%E5%A6%82%E4%B8%8B%E7%A8%8B%E5%BA%8F%E6%AE%B5%E5%90%8E%28+40H+%29+%3DMOV+%40R0+%2C%2311HMOV+A+%2CR2ADD+A+%2C20HMOV+PSW+%2C%2380HSUBB+A+%2CP0XRL+A+%2C%2345HMOV+40H+%2CA2%E3%80%81%E5%B7%B2%E7%9F%A5)
求单片机习题答案,五、分析程序并写出结果:(每题5分,1、已知(R0)=20H,(20H ) =10H,(P0) =30H,(R2) =20H,执行如下程序段后( 40H ) =MOV @R0 ,#11HMOV A ,R2ADD A ,20HMOV PSW ,#80HSUBB A ,P0XRL A ,#45HMOV 40H ,A2、已知
求单片机习题答案,
五、分析程序并写出结果:(每题5分,
1、已知(R0)=20H,(20H ) =10H,(P0) =30H,(R2) =20H,执行如下程序段后( 40H ) =
MOV @R0 ,#11H
MOV A ,R2
ADD A ,20H
MOV PSW ,#80H
SUBB A ,P0
XRL A ,#45H
MOV 40H ,A
2、已知 ( R0 )=20H,(20H )=36H,(21H) =17H,(36H) =34H,执行过程如下:
MOV A ,@R0
MOV R0 ,A
MOV A ,@R0
ADD A ,21H
ORL A ,#21H
RL A
MOV R2 ,A
RET
则执行结束(R0)= (R2)=
3、执行下面一段程序;
MOV SP,#60H
MOV A,#10H
MOV B,#01H
PUSH A
PUSH B
POP A
POP B
A ,B的内容是:(A)= (B)=
4、设在31H单元存有#23H,执行下面程序:
MOV A,31H
ANL A,#0FH
MOV 41H,A
MOV A,31H
ANL A,#0F0H
SWAP A
MOV 42H,A
则(41H)= (42H)=
5、假定(A)=0FFH,(R3)=0FH,(30H)=0F0H,(R0)=40H,(40H)=00H.执行指令:
INC A
INC R3
INC 30H
INC @R0
后,累加器A的内容为( ),R3的内容为( ),30H的内容为( ),
40H的内容为( ).
求单片机习题答案,五、分析程序并写出结果:(每题5分,1、已知(R0)=20H,(20H ) =10H,(P0) =30H,(R2) =20H,执行如下程序段后( 40H ) =MOV @R0 ,#11HMOV A ,R2ADD A ,20HMOV PSW ,#80HSUBB A ,P0XRL A ,#45HMOV 40H ,A2、已知
单片机种类很多的,这里用最基本的,8051
三.答(汇编):
ORG 0200H
MOV DPTR,#2000H
MOVX A,@DPTR
MOV DPTR,#3000H
MOVX @DPTR,A
RET
五.51单片机中断源有五个,分别是外部中断0(入口地址是0003H)定时器0中断(000BH)外部中断1(0013H)定时器1中断(001BH)和串行中断(0023H)
六.答 (汇编)
ORG 0300H
MOV DPTR,#3000H
MOV R0,#30
MOV A,20H
LOP:MOVX @DPTR,A
INC A
INC DPTR
DJNZ R0,LOP
END
至于第七个问题,