51的简单好记命令分类

1.Arithmetic operations:（算术） Mnemonic Byte Cyc ADD A,@Ri 1 1 ADD A,Rn 1 1 ADD A,direct 2 1 ADD A,#data 2 1 ADDC A,@Ri 1 1 ADDC A,Rn 1 1 ADDC A,direct 2 1 ADDC A,#data 2 1 SUBB A,@Ri 1 1 SUBB A,Rn 1 1 SUBB A,direct 2 1 SUBB A,#data 2 1 INC A 1 1 INC @Ri 1 1 INC Rn 1 1 INC DPTR 1 1 INC direct 2 1 INC direct 2 1 DEC A 1 1 DEC @Ri 1 1 DEC Rn 1 1 DEC direct 2 1 MUL AB 1 4 DIV AB 1 4 DA A 1 12.Logical opreations:（逻辑） ANL A,@Ri 1 1 XRL A,@Ri 1 1 ANL A,Rn 1 1 XRL A,Rn 1 1 ANL A,direct 2 1 XRL A,direct 2 1 ANL A,#data 2 1 XRL A,#data 2 1 ANL direct,A 2 1 XRL direct,A 2 1 ANL direct,#data 3 2 XRL direct,#data 3 2 ORL A,@Ri 1 1 CLR A 1 1 ORL A,Rn 1 1 CPL A 1 1 ORL A,direct 2 1 RL A 1 1 ORL A,#data 2 1 RLC A 1 1 ORL direct,A 2 1 RR A 1 1 ORL direct,#data 3 2 RRC A 1 1 SWAP A 1 13.Data transfer:（数据传送） Mnemonic Byte Cyc MOV A,@Ri 1 1 MOV DPTR,#data16 3 2 MOV A,Rn 1 1 MOVC A,@A+DPTR 1 2 MOV A,direct 2 1 MOVC A,@A+PC 1 2 MOV A,#data 2 1 MOVX A,@Ri 1 2 MOV @Ri,A 1 1 MOVX A,@DPTR 1 2 MOV @Ri,direct 2 2 MOVX @Ri,A 1 2 MOV @Ri,#data 2 1 MOVX @DPTR,A 1 2 MOV Rn,A 1 1 PUSH direct 2 2 MOV Rn,direct 2 2 POP direct 2 2 MOV Rn,#data 2 1 XCH A,@Ri 1 1 MOV direct,A 2 1 XCH A,Rn 1 1 MOV direct,@Ri 2 2 XCH A,direct 2 1 MOV direct,Rn 2 2 XCHD A,@Ri 1 1 MOV direct,direct 3 2 MOV direct,#data 3 24.Boolean variable manipulation:（布尔数操作） Mnemonic Byte Cyc CLR C 1 1 ANL C,bit 2 2 SETB C 1 1 ANL C,/bit 2 2 CPL C 1 1 ORL C,bit 2 2 CLR bit 2 1 ORL C,/bit 2 2 SETB bit 2 1 MOV C,bit 2 1 CPL bit 2 1 MOV bit,C 2 25.Program and machine control:（流程控制） Mnemonic Byte Cyc NOP 1 1 JZ rel 2 2 RET 1 2 JNZ rel 2 2 RETI 1 2 JC rel 2 2 ACALL addr11 2 2 JNC rel 2 2 AJMP addr11 2 2 JB bit,rel 3 2 LCALL addr16 3 2 JNB bit,rel 3 2 LJMP addr16 3 2 JBC bit,rel 3 2 SJMP rel 2 2 CJNE A,direct,rel 3 2 JMP @A+DPTR 1 2 CJNE A,#data,rel 3 2 DJNZ Rn,rel 2 2 CJNE @Ri,#data,rel 3 2 DJNZ direct,rel 3 2 CJNE Rn,#data,rel 3 2