MCS-51指令表.doc

227附录A MCS-51指令表A附录MCS-51指令表MCS-51指令系统所用的符号和含义addr1111位地址addr1616位地址bit位地址rel相对偏移量，为8位有符号数（补码形式）direct直接地址单元#data立即数Rn工作寄存器R0R7A累加器Rii=0,1,R0或R1X片内RAM中的直接地址或寄存器表示间址寄存器的符号表示直接地址X中的内容；在间接寻址方式中，表示间址寄存器地址X指出的地址单元中的内容数据传送方向逻辑与逻辑或逻辑异或对标志产生影响不影响标志十六进制代码助 记 符功 能对标志影响字节数周期数POVACCY算 术 运 算 指 令282F2526，2724383F3536，3734989F9596，979404080F0506，07A3ADD A,RnADD A,directADD A,RiADD A,#dataADDC A,RnADDC A,directADDC A,RiADDC A,#dataSUBB A,RnSUBB A,directSUBB A,RiSUBB A,#dataINC AINC RnINC directINC RiINC DPTRA+RnAA+(direct) AA+(Ri) AA+dataAA+Rn+CYAA+(direct)+CYAA+(Ri)+CYAA+data+CYAARnCYAA(direct)-CYAA(Ri)CYAAdataCYAA+1ARn+1Rn(direct)+1(direct)(Ri)+1(Ri)DPTR+1DPTR1212121212121121111111111111111112续上表 十六进制代码助 记 符功 能对标志影响字节数周期数POVACCY算 术 运 算 指 令14181F1516，17A484D4DEC ADEC RnDEC directDEC RiMUL ABDIV ABDA AA-1ARn-1Rn(direct)-1(direct)(Ri)-1(Ri)ABABA/BAB对A进行十进制调整0011211111111441逻 辑 运 算 指 令585F5556，57545253484F4546，47444243686F6566，67646263E4F423330313C4ANL A,RnANL A,directANL A,RiANL A,#dataANL direct,AANL direct,#dataORL A,RnORL A,directORL A,RiORL A,#dataORL direct,AORL direct,#dataXRL A,RnXRL A,directXRL A,RiXRL A,#dataXRL direct,AXRL direct,#dataCLR ACPL ARL ARLC ARR ARRC ASWAP AARnAA(direct)AA(Ri) AAdataA(direct) AA(direct) dataAARnAA(direct) AA(Ri) AAdataA(direct) A(direct)(direct) data(direct)ARnAA(direct) AA(Ri) AAdataA(direct) A(direct)(direct) data(direct)0AAAA循环左移一位A带进位循环左移一位A循环右移一位A带进位循环右移一位A半字节交换12122312122312122311111111111121111121111121111111数 据 传 送 指 令E8EFE5E6，E774E8FFMOV A,RnMOV A,directMOV A,RiMOV A,#dataMOV Rn,ARnA(direct) A(Ri) AdataAARn1212111111续上表 十六进制代码助 记 符功 能对标志影响字节数周期数POVACCYA8AF787FF5MOV Rn,directMOV Rn,#dataMOV direct,A(direct) RndataRnA(direct)222211888F8586，8775F6，F7A6，A776，77909383E2，E3E0F2，F3F0C0D0C8CFC5C6，C7D6，D7MOV direct,RnMOV direct1,direct2MOV direct,RiMOV direct,#dataMOV Ri,AMOV Ri,directMOV Ri,#dataMOV DPTR,#data16MOVC A,A+DPTRMOVC A,A+PCMOVX A,RiMOVX A,DPTRMOVX Ri,AMOVX DPTR,APUSH directPOP directXCH A,RnXCH A,directXCH A,RiXCHD A,RiRn(direct)(direct2) (direct1)(Ri) (direct)data(direct)A(Ri)(direct) (Ri)data(Ri)data16DPTR(A+DPTR) APC+1PC,(A+PC) A(Ri) A(DPTR) AA(Ri)A(DPTR)SP+1SP,(direct) (SP)(SP) (direct),SP-1SPARnA(direct)A(Ri)A03(Ri)03 2323122311111122121122221212222222221111位 操 作 指 令C3CLR C0cy11C2D3D2B3B282B072A0A292CLR bitSETB CSETB bitCPL CCPL bitANL C,bitANL C,/bitORL C,bitORL C,/bitMOV C,bitMOV bit,C0bit1cy1bitcycybitbitcybitcycybitcycybitcycybitcybitcycybit2121222222211111222212续上表 十六进制代码助记符功 能对标志影响字节数周期数POVACCY控 制 转 移 指 令*1122232*102807360704050203010B5B4B8BFB6B7D8DFD500ACALL addr 11LCALL addr 16RETRETIAJMP addr 11LJMP addr 16SJMP re1JMP A+DPTRJZ relJNZ relJC relJNC relJB bit,relJNB bit,relJBC bit,relCJNE A,direct,relCJNE A,#data,relCJNE Rn,#data,relCJNE Ri,#data relDJNZ Rn,relDJNZ direct,relNOPPC+2PC,SP+1SP,PCL(SP)SP+1SP,PCH(SP),Addrl1PC100PC+3PC,SP+1SP,PCL(SP),SP+1SP,PCH(SP),addr16PC(SP) PCH,SP-1SP,(SP) PCLSP-1SP(SP) PCH,SP-1SP,(SP) PCLSP-1SPPC+2PC,addr11PC100addr16PCPC+2PC,PC+relPC(A+DPTR) PCPC+2PC，若A=0,PC+relPCPC+2PC,若A不等于0,则PC+relPCPC+2PC,若cy=1,则PC+relPCPC+2PC,若cy=0,则PC+relPCPC+3PC,若bit=1,则PC+relPCPC+3PC,若bit=0,则PC+relPCPC+3PC,若bit=1,则0bitPC+relPCPC+3PC,若A不等于(direct),则PC+relPC若A(direct),则1cyPC+3PC,若A不等于data,则PC+relPC,若A小于data,则1cyPC+3PC,若Rn不等于data,则PC+relPC,若Rn小于data,则