ADD A, Rn

A A + Rn

1

1

ADD A, direct

A A + (direct)

2

1

ADD A, @Ri

A A + @Ri

1

1

ADD A, #data

A A + data

2

1

ADDC A, Rn

A A + Rn + C

1

1

ADDC A, direct

A   A + (direct) + C

2

1

ADDC A, @Ri

A A + @Ri + C

1

1

ADDC A, #data

A A + data + C

2

1

DA A

Decimal adjust accumulator

1

1

DIV AB

Divide A by B
A quotient
B remainder

1

4

DEC A

A A -1

1

1

DEC Rn

Rn Rn - 1

1

1

DEC direct

(direct) (direct) - 1

2

1

DEC @Ri

@Ri @Ri - 1

1

1

INC A

A A+1

1

1

INC Rn

Rn Rn + 1

1

1

INC direct

(direct) (direct) + 1

2

1

INC @Ri

@Ri @Ri +1

1

1

INC DPTR

DPTR DPTR +1

1

2

MUL  AB

Multiply A by B
A low byte (A*B)
B high byte (A* B)

1

4

SUBB A, Rn

A A - Rn - C

1

1

SUBB A, direct

A A - (direct) - C

2

1

SUBB A, @Ri

A A - @Ri - C

1

1

SUBB A, #data

A A - data - C

2

1

ANL A, Rn

A A AND Rn

1

1

ANL A, direct

A A AND (direct)

2

1

ANL A, @Ri

A A AND @Ri

1

1

ANL A, #data

A A AND data

2

1

ANL direct, A

(direct) (direct) AND A

2

1

ANL direct, #data

(direct) (direct) AND data

3

2

CLR A

A 00H

1

1

CPL A

AA

1

1

ORL A, Rn

A A OR Rn

1

1

ORL A, direct

A A OR (direct)

1

1

ORL A, @Ri

A A OR @Ri

2

1

ORL A, #data

A A OR data

1

1

ORL direct, A

(direct) (direct) OR A

2

1

ORL direct, #data

(direct) (direct) OR data

3

2

RL A

Rotate accumulator left

1

1

RLC A

Rotate accumulator left through carry

1

1

RR A

Rotate accumulator right

1

1

RRC A

Rotate accumulator right through carry

1

1

SWAP A

Swap nibbles within Acumulator

1

1

XRL A, Rn

A A EXOR Rn

1

1

XRL A, direct

A A EXOR (direct)

1

1

XRL A, @Ri

A A EXOR @Ri

2

1

XRL A, #data

A A EXOR data

1

1

XRL direct, A

(direct) (direct) EXOR A

2

1

XRL direct, #data

(direct) (direct) EXOR data

3

2

MOV A, Rn

A Rn

1

1

MOV A, direct

A (direct)

2

1

MOV A, @Ri

A @Ri

1

1

MOV A, #data

A data

2

1

MOV Rn, A

Rn A

1

1

MOV Rn, direct

Rn (direct)

2

2

MOV Rn, #data

Rn data

2

1

MOV direct, A

(direct) A

2

1

MOV direct, Rn

(direct) Rn

2

2

MOV direct1, direct2

(direct1) (direct2)

3

2

MOV direct, @Ri

(direct) @Ri

2

2

MOV direct, #data

(direct) #data

3

2

MOV @Ri, A

@Ri A

1

1

MOV @Ri, direct

@Ri (direct)

2

2

MOV @Ri, #data

@Ri data

2

1

MOV DPTR, #data16

DPTR data16

3

2

MOVC A, @A+DPTR

A Code byte pointed by A + DPTR

1

2

MOVC A, @A+PC

A Code byte pointed by A + PC

1

2

MOVC A, @Ri

A Code byte pointed by Ri 8-bit address)

1

2

MOVX A, @DPTR

A External data pointed by DPTR

1

2

MOVX @Ri, A

@Ri A (External data - 8bit address)

1

2

MOVX @DPTR, A

@DPTR A(External data - 16bit address)

1

2

PUSH direct

(SP) (direct)

2

2

POP direct

(direct) (SP)

2

2

XCH Rn

Exchange A with Rn

1

1

XCH direct

Exchange A with direct byte

2

1

XCH @Ri

Exchange A with indirect RAM

1

1

XCHD A, @Ri

Exchange least significant nibble of A with that of indirect RAM

1

1

CLR C

C-bit 0

1

1

CLR bit

bit 0

2

1

SET C

C 1

1

1

SET bit

bit 1

2

1

CPL C

C 

1

1

CPL bit

bit  

2

1

ANL C, /bit

C C .

2

1

ANL C, bit

C C. bit

2

1

ORL C, /bit

 C C +

2

1

ORL C, bit

C C + bit

2

1

MOV C, bit

C bit

2

1

MOV bit, C

bit C

2

2

ACALL addr11

PC + 2 (SP) ; addr 11 PC

2

2

AJMP addr11

Addr11 PC

2

2

CJNE A, direct, rel

Compare with A, jump (PC + rel) if not equal

3

2

CJNE A, #data, rel

Compare with A, jump (PC + rel) if not equal

3

2

CJNE Rn, #data, rel

Compare with Rn, jump (PC + rel) if not equal

3

2

CJNE @Ri, #data, rel

Compare with @Ri A, jump (PC + rel) if not equal

3

2

DJNZ Rn, rel

Decrement Rn, jump if not zero

2

2

DJNZ direct, rel

Decrement (direct), jump if not zero

3

2

JC rel

Jump (PC + rel) if C bit = 1

2

2

JNC rel

Jump (PC + rel) if C bit = 0

2

2

JB bit, rel

Jump (PC + rel) if bit = 1

3

2

JNB bit, rel

Jump (PC + rel) if bit = 0

3

2

JBC bit, rel

Jump (PC + rel) if bit = 1

3

2

JMP @A+DPTR

A+DPTR PC

1

2

JZ rel

If A=0, jump to PC + rel

2

2

JNZ rel

If A ≠ 0 , jump to PC + rel

2

2

LCALL addr16

PC + 3 (SP), addr16 PC

3

2

LJMP addr 16

Addr16 PC

3

2

NOP

No operation

1

1

RET

(SP) PC

1

2

RETI

(SP) PC, Enable Interrupt

1

2

SJMP rel

PC + 2 + rel PC

2

2