【单选题】下列指令或指令序列中,能将外部数据存储器3355H单元内容传送给A的是
A. MOVX A, 3355H B. MOV DPTR, #3355H MOVX A, @ DPTR C. MOV P0, #33H MOV R0, #55H MOVX A, @ R0 D. MOV P2, #33H MOV P2, #33H MOVX A, @ R2
A. MOVX A, 3355H B. MOV DPTR, #3355H MOVX A, @ DPTR C. MOV P0, #33H MOV R0, #55H MOVX A, @ R0 D. MOV P2, #33H MOV P2, #33H MOVX A, @ R2
举一反三
- 下列哪条指令是正确的( )a) PUSH R2 b) ADD R0,Ac) MOVX A @DPTR d) MOV @R,A A: PUSH R2 B: ADD R0,A C: MOVX A @DPTR D: MOV @R,A
- 根据下列程序段运行情况,将运行结果和指令分别补充完整。 (1)( );(A)=10H ( );(B)=10H ( );(A)=20H MOV 23H,A;(23H)=20H ( );(A)=21H MOV 24H,A;(24H)=21H INC A ;(A)=22H ( );(25H)= 22H (2)MOV A,#50H;(A)=( )H MOV R0,A;(R0)=( )H MOV @R0,#30H;(50H)=( )H ADD A,@R0;(A)=( )H MOVX @R0,A;(50H)=( )H
- 写出下列指令的功能 MOV A,#78H MOV A,78H MOV A,@R0 MOVX A,@R1 MOVC A,@A+PC MOVC A,@A+DPTR MOVX A,@DPTR
- 下列指令中,源操作数不是寄存器间接寻址的指令是() A: MOVX A, @R1 B: MOVX A, @DPTR C: MOV A, @R0 D: MOV A, R0
- 将内部数据存储单元的内容传送到累加器A中的指令是(<br/>)。 A: MOVX A,@R0 B: MOV A, #20H C: MOV A,@R0 D: MOVX A, @DPTR