Set Instruksi MCS-51

Operasi Aritmatika

Mnemonic	Deskripsi	Ukuran	Cycle
ADD A,Rn	Menambahkan register ke accumulator (ACC)	1	1
ADD A,direct	Menambahkan direct byte to ACC	2	1
ADD A,@Ri	Menambahkan indirect RAM ke ACC	1	1
ADD A,#data	Menamabhkan data ke ACC	2	1
ADDC A,Rn	Menambahkan register ke ACC dengan carry	1	1
ADDC A,direct	Menanbahkan direct byte ke ACC dengan carry	2	1
ADDC A,@Ri	Menambahkan indirect RAM ke ACC dengan carry	1	1
ADDC A,#data	Menambahkan data ke ACC dengan carry	2	1
SUBB A,Rn	Subtract register from ACC with borrow	1	1
SUBB A,direct	Subtract direct byte from ACC with borrow	2	1
SUBB A,@Ri	Subtract indirect RAM from ACC with borrow	1	1
SUBB A,#data	Subtract immediate data from ACC with borrow	2	1
INC A	Increment ACC	1	1
INC Rn	Increment register	1	1
INC direct	Increment direct byte	2	1
INC @Ri	Increment indirect RAM	1	1
INC DPTR	Increment data pointer	1	2
DEC A	Decrement ACC	1	1
DEC Rn	Decrement register	1	1
DEC direct	Decrement direct byte	2	1
DEC @Ri	Decrement indirect RAM	1	1
MUL AB	Mengalikan A dan B	1	4
	Hasil: A<- low byte ; B-> high byte
DIV AB	Membagi A dengan B	1	4
	Hasil: A<-Seluruh bagian ; B<- remainder
DA A	Mengubah ACC menjadi decimal	1	1

Operasi Logika

Mnemonic	Deskripsi	Ukuran	Cycle
ANL A,Rn	AND register to ACC	1	1
ANL A,direct	AND direct byte to ACC	2	1
ANL A,@Ri	AND indirect RAM to ACC	1	1
ANL A,#data	AND immediate data to ACC	2	1
ANL direct,#data	AND immediate data to direct byte	3	2
ORL A,Rn	OR register to ACC	1	1
ORL A,direct	OR direct byte to ACC	2	1
ORL A,@Ri	OR indirect RAM to ACC	1	1
ORL A,#data	OR immediate data to ACC	2	1
ORL direct,A	OR ACC to direct byte	2	1
ORL direct,#data	OR immediate data to direct byte	3	2
XRL A,Rn	Exclusive OR register to ACC	1	1
XRL A,direct	Exclusive OR direct byte to ACC	2	1
XRL A,@Ri	Exclusive OR indirect RAM to ACC	1	1
XRL A,#data	Exclusive OR immediate data to ACC	2	1
XRL direct,A	Exclusive OR ACC to direct byte	2	1
XRL direct,#data	XOR immediate data to direct byte	3	2
CLR A	Clear ACC (set all bits to zero)	1	1
CPL A	Compliment ACC	1	1
RL A	Rotate ACC left	1	1
RLC A	Rotate ACC left through carry	1	1
RR A	Rotate ACC right	1	1
RRC A	Rotate ACC right through carry	1	1
SWAP A	Swap nibbles within ACC	1	1

Transfer Data

Mnemonic	Description	Size	Cycle
MOV A,Rn	Memindahkan register ke ACC	1	1
MOV A,direct	Memindahkan direct byte ke ACC	2	1
MOV A,@Ri	Memindahkan indirect RAM ke ACC	1	1
MOV A,#data	Memindahkan data ke ACC	2	1
MOV Rn,A	Memindahkan ACC ke register	1	1
MOV Rn,direct	Memindahkan direct byte ke register	2	2
MOV Rn,#data	Memindahkan data ke register	2	1
MOV direct,A	Memindahkan ACC ke direct byte	2	1
MOV direct,Rn	Memindahkan register ke direct byte	2	2
MOV direct,direct	Memindahkan direct byte ke direct byte	3	2
MOV direct,@Ri	Memindahkan indirect RAM ke direct byte	2	2
MOV direct,#data	Memindahkan data ke direct byte	3	2
MOV @Ri,A	Memindahkan ACC ke indirect RAM	1	1
MOV @Ri,direct	Memindahkan direct byte ke indirect RAM	2	2
MOV @Ri,#data	Memindahkan data ke indirect RAM	2	1
MOV DPTR,#data16	Memindahkan 16bit data ke data pointer register	3	2
MOVC A,@A+DPTR	Memindahkan code byte relative ke DPTR to ACC (16bit address)	1	2
MOVC A,@A+PC	Memindahkan code byte relative ke PC to ACC (16bit address)	1	2
MOVX A,@Ri	Memindahkan external RAM ke ACC (8bit address)	1	2
MOVX A,@DPTR	Memindahkan external RAM ke ACC (16bit address)	1	2
MOVX @Ri,A	Memindahkan ACC ke external RAM (8bit address)	1	2
MOVX @DPTR,A	Memindahkan ACC ke external RAM (16bit address)	1	2
PUSH direct	Memasukkan direct byte ke dalam stack	2	2
POP direct	Mengambil direct byte dari stack	2	2
XCH A,Rn	Exchange register with ACC	1	1
XCH A,direct	Exchange direct byte with ACC	2	1
XCH A,@Ri	Exchange indirect RAM with ACC	1	1
XCHD A,@Ri	Exchange low order nibble of indirect RAM with low	1	1
	order nibble of ACC

Manipulasi Variabel Boolean

Mnemonic	Deskripsi	Ukuran	Cycle
CLR C	Clear Carry Flag	1	1
CLR bit	Clear direct bit	2	1
SETB C	Set carry flag	1	1
SETB bit	Set direct bit	2	1
CPL C	Compliment carry flag	1	1
CPL bit	Compliment direct bit	2	1
ANL C,bit	AND direct bit to carry flag	2	2
ANL C,/bit	AND compliment of direct bit to carry	2	2
ORL C,bit	AND direct bit to carry flag	2	2
ANL C,/bit	AND compliment of direct bit to carry	2	2
MOV C,bit	Move direct bit to carry flag	2	1
MOV bit,C	Move carry to direct bit	2	2
JC rel	Jump if carry is set	2	2
JNC rel	Jump if carry is not set	2	2
JB bit,rel	Jump if direct bit is set	3	2
JNB bit,rel	Jump if direct bit is not set	3	2
JBC bit,rel	Jump if direct bit is set & clear bit	3	2

Program Percabangan (Branching)

Mnemonic	Deskripsi	Ukuran	Cycle
ACALL addr11	Absolute subroutine call	2	2
LCALL addr16	Long subroutine call	3	2
RET	Return from subroutine	1	2
RETI	Return from Interrupt	1	2
AJMP addr11	Absolute jump	2	2
LJMP addr16	Long jump	3	2
SJMP rel	Short jump (relative address)	2	2
JMP @A+DPTR	Jump indirect relative to the DPTR	1	2
JZ rel	Jump relative if ACC is zero	2	2
JNZ rel	Jump relative if ACC is not zero	2	2
CJNE A,direct,rel	Compare direct byte to ACC and jump if not equal	3	2
CJNE A,#data,rel	Compare immediate byte to ACC and jump if not
	equal	3	2
CJNE Rn,#data,rel	Compare immediate byte to register and jump if
	not equal	3	2
CJNE @Ri,data,rel	Compare immediate byte to indirect and jump if
	not equal	3	2
DJNZ Rn,rel	Decreament register and jump if not zero	2	2
DJNZ direct,rel	Decreament direct byte and jump if not zero	3	2