每)天半紫大学 IIANJIN POLYTECHNIC UNIVERSITY b直接寻址传送 MOV A, direct ;(direct)A MoV direct, A;(A)->direct 双字节 MOV Rn, direct; ( direct)Rn MOV @Ri, direct;(direct)-(Ri) MoV direct, direct1;(direct1)direct 字节 例已知R0=20H,(20H)=11H,(30H)=22H,40H)= 33H问8051执行如下指令后,累加器A、50H、R5 20H和60H单元中的内容是什么? 信息与通信工程学院
b.直接寻址传送 双字节 MOV A, direct ；(direct)→A MOV direct, A ； (A) → direct MOV Rn, direct；(direct)→Rn MOV @Ri,direct；(direct)→(Ri) MOV direct2, direct1；(direct1)→direct2 三字节 例.已知R0=20H，(20H)=11H, (30H)=22H,(40H)= 33H问8051执行如下指令后,累加器A、50H、R5、 20H和60H单元中的内容是什么?
每)天半紫大学 IIANJIN POLYTECHNIC UNIVERSITY MOV 20H MOV 50H A MOV R5 30H MOV @RO, 40H MOV 60H 50H (A)=11H,(50H)=11H,(R5)=22H, (20H)=33H,(60H)=11H 信息与通信工程学院
MOV A , 20H MOV 50H , A MOV R5 , 30H MOV @R0 , 40H MOV 60H , 50H (A)=11H, (50H)=11H, (R5)=22H, (20H)=33H, (60H)=11H
每)天半紫大学 IIANJIN POLYTECHNIC UNIVERSITY c寄存器寻址型传送指令 MovA,Rn;Rn→A MoV direct, Rn; Rn-(direct) MOV Rn,A:A→Rn MOV direct, A; A(direct) d寄存器间址型传送指令 MOVA,@Ri;(R)→A MoV@Ri,A;A→(R) MoV direct, Ri;((RiD)direct 信息与通信工程学院
c.寄存器寻址型传送指令 MOV A , Rn；Rn→A MOV direct , Rn；Rn→(direct) MOV Rn , A；A→Rn MOV direct , A；A→(direct) d.寄存器间址型传送指令 MOV A , @Ri；((Ri))→A MOV @Ri, A ； A → (Ri) MOV direct , @Ri；((Ri))→direct
每)天半紫大学 IIANJIN POLYTECHNIC UNIVERSITY 例已知R0=30H,R1=40H,(30H)=AAH,(40H)=BBH, 问8051执行如下指令后,累加器A、30H、40H和50H单 元中的内容是什么? MOV A, RO MOV @R1, A MOV 50H, @ R1 (AFAAH, 30H)FAAH, (40H)FAAH, (50H)FAAH 信息与通信工程学院
例.已知R0=30H，R1=40H，(30H)=AAH, (40H)=BBH, 问8051执行如下指令后，累加器A、30H、40H和50H单 元中的内容是什么? MOV A , @R0 MOV @R1 , A MOV 50H , @R1 (A)=AAH ,(30H)=AAH,(40H)=AAH,(50H)=AAH
每)天半紫大学 IIANJIN POLYTECHNIC UNIVERSITY 累加器 D irect @R 直接寻址 间址 Rn #data DPTR 寄存器 立即数 寄存器 注意:a指令不能创造 MOV Rn,@Ri bA影响 PSW MOV#data,A 信息与通信工程学院
注意：a.指令不能创造 b.A影响PSW MOV Rn , @Ri MOV #data , A