附录单片机指令表

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1、附录MCS-51单片机指令表附录MCS-51单片机指令表指令类型指令代码操作数操作说明字节数机器周期数数据传送类(15条)MOVA，#dataA←data21MOVRn，#dataRn←data21MOV@Ri，#data(Ri)←data22MOVA，directA←(direct)21MOVdirect，A(direct)←A21MOVRn，directRn←(direct)21MOV@Ri，dircet(Ri)←(direct)22MOVdirect，direct(direct)←(direct)32MOVdirect，#data(direct)←#data3

2、2MOVA，RnA←Rn11MOVRn，ARn←A11MOVdirect，Rn(direct)←Rn21MOVA，@RiA←Ri11MOV@Ri，A(Ri)←A11MOVdirect，@Ri(direct)←(Ri)22附录MCS-51单片机指令表16位数据传送MOVDPTR，#data16DPTR←#data1632外部ROM数据传送MOVCA，@A+PCA←(A+PC)12MOVCA，@A+DPTRA←(A+DPTR)，PC←PC+112外部RAM数据传送MOVXA，@RiA←(Ri)12MOVX@Ri，A(Ri)←A12MOVXA，@DPTRA←(DPTR)1

3、2MOVX@DPTR，A(DPTR)←A12数据交换XCHA，RnA←→Rn11XCHA，directA←→direct12XCHA，@RiA←→(Ri)11XCHDA，@RiA3-0←→(Ri)3-011SWAPAA7-4←→(Ri)3-011堆栈操作PUSHdirectSP←SP+1，(SP)←(direct)22POPdirect(SP)→(direct)，SP←SP-122加法指令ADDA，RnA←A+Rn11ADDA，directA←A+(direct)21ADDA，@RiA←A+(Ri)11ADDA，#dataA←A+#data21ADDCA，RnA←A

4、+Rn+Cy11附录MCS-51单片机指令表指令类型指令代码操作数操作说明字节数机器周期数加法指令ADDCA，directA←A+(direct)+Cy21ADDCA，@RiA←A+(Ri)+Cy11ADDCA，#dataA←A+#data+Cy21INCAA←A+111INCRnRn←Rn+111INC@Ri(Ri)←(Ri)+111INCdirect(direct)←(direct)+121INCDPTRDPTR←DPTR+112减法指令SUBBA，RnA←A-Rn11SUBBA，directA←A-(direct)22SUBBA，@RiA←A-(Ri)11SU

5、BBA，#dataA←A-data21DECAA←A-111DECRnRn←Rn-111DECdirect(direct)←(direct)-121DEC@Ri(Ri)←(Ri)-111附录MCS-51单片机指令表十进制调整指令DAA若Ac=1或A的低四位大于9，A←A+06H若Cy=1或A的高四位大于9，A←A+60H11乘法指令MULABA×B=BA，形成标志14除法指令DIVABA÷B=A…B，形成标志14与运算ANLA，RnA←A∩Rn11ANLA，directA←A∩(direct)21ANLA，@RiA←A∩(Ri)11ANLA，#dataA←A∩#da

6、ta21ANLdirect，A(direct)←(direct)∩A21ANLdirect，#data(direct)←(direct)∩#data32附录MCS-51单片机指令表或运算ORLA，RnA←A∪Rn11ORLA，directA←A∪(direct)21ORLA，@RiA←A∪(Ri)11ORLA，#dataA←A∪#data21ORLdirect，A(direct)←(direct)∪A21ORLdirect，#data(direct)←(direct)∪#data32异或运算XRLA，RnRn11XRLA，direct(direct)21XRLA，@

7、Ri(Ri)11XRLA，#data#data21XRLdirect，AA21XRLdirect，#data#data32附录MCS-51单片机指令表累加器清0CLRAA←011累加器取反CPLAA←/A11移位指令RLA循环左移1位11RRA循环右移1位11RLCA带进位循环左移1位11RRCA带进位循环右移1位11附录MCS-51单片机指令表指令类型指令代码操作数操作说明字节数机器周期数无条件转移指令LJMPaddr16PC←addr1632AJMPaddr11PC←PC+2，PC10-0←addr1122SJMPrelPC←PC+2，PC←PC+rel22