|
| |
| 8051
instruction set summary  arithmetic operations
logical operations
data transfer
Boolean variable manipulation
program branching
 arithmetic operations
|
| mnemonic |
discription |
byte |
cycle |
| ADD A, Rn |
add register to
acc. |
1 |
12 |
| ADD A, direct |
add direct byte to
acc. |
2 |
12 |
| ADD A, @Ri |
add indirect RAM to
acc. |
1 |
12 |
| ADD A, #data |
add immediate data
to acc. |
2 |
12 |
| ADDC A, Rn |
add register to
acc. w/carry |
1 |
12 |
| ADDC A, direct |
add direct byte to
acc. w/carry |
2 |
12 |
| ADDC A, @Ri |
add indirect RAM to
acc. w/carry |
1 |
12 |
| ADDC A, #data |
add immediate data
to acc. w/carry |
2 |
12 |
| SUBB A, Rn |
subtract register
from acc. w/borrow |
1 |
12 |
| SUBB A, direct |
subtract direct
byte from acc. w/borrow |
2 |
12 |
| SUBB A, @Ri |
subtract indirect
RAM from acc. w/borrow |
1 |
12 |
| SUBB A, #data |
subtract immediate
data from acc. w/borrow |
2 |
12 |
| INC A |
increment acc. |
1 |
12 |
| INC Rn |
increment register |
1 |
12 |
| INC direct |
increment direct
byte |
2 |
12 |
| INC @Ri |
increment direct
RAM |
1 |
12 |
| DEC A |
decrement acc. |
1 |
12 |
| DEC Rn |
decrement register |
1 |
12 |
| DEC direct |
decrement direct
byte |
2 |
12 |
| DEC @Ri |
decrement direct
RAM |
1 |
12 |
| INC DPTR |
increment Data
Pointer |
1 |
24 |
| MUL AB |
multiply A & B |
1 |
48 |
| DIV AB |
divide A by B |
1 |
48 |
| DA A |
decimal adjust acc. |
1 |
12 |
| logical operations |
| mnemonic |
description |
byte |
cycle |
| ANL A, Rn |
AND register to
acc. |
1 |
12 |
| ANL A, direct |
AND direct byte to
acc. |
2 |
12 |
| ANL A, @Ri |
AND indirect RAM to
acc. |
1 |
12 |
| ANL A, #data |
AND immediate data
to acc. |
2 |
12 |
| ANL direct, A |
AND acc. to direct
byte |
2 |
12 |
| ANL direct, #data |
AND immediate data
to direct byte |
3 |
24 |
| ORL A, Rn |
OR register to acc. |
1 |
12 |
| ORL A, direct |
OR direct byte to
acc. |
2 |
12 |
| ORL A, @Ri |
OR indirect RAM to
acc. |
1 |
12 |
| ORL A, #data |
OR immediate data
to acc. |
2 |
12 |
| ORL direct, A |
OR acc. to direct
byte |
2 |
12 |
| ORL direct, #data |
OR immediate data
to direct byte |
3 |
24 |
| XRL A, Rn |
exclusive-OR
register to acc. |
1 |
12 |
| XRL A, direct |
exclusive-OR direct
byte to acc. |
2 |
12 |
| XRL A, @Ri |
exclusive-OR
indirect RAM to acc. |
1 |
12 |
| XRL A, #data |
exclusive-OR
immediate data to acc. |
2 |
12 |
| XRL direct, A |
exclusive-OR acc.
to direct byte |
2 |
12 |
| XRL direct, #data |
exclusive-OR
immediate data to direct byte |
3 |
24 |
| RL A |
rotate acc. left |
1 |
12 |
| RLC A |
rotate acc. left
through the carry |
1 |
12 |
| RR A |
rotate acc. right |
1 |
12 |
| RRC A |
rotate acc. right
through the carry |
1 |
12 |
| SWAP A |
swap nibbles within
the acc. |
1 |
12 |
| data
transfer |
| mnemonic |
description |
byte |
cycle |
| MOV A, Rn |
move register to
acc. |
1 |
12 |
| MOV A, direct |
move direct byte to
acc. |
2 |
12 |
| MOV A, @Ri |
move indirect RAM
to acc. |
1 |
12 |
| MOV A, #data |
move immediate data
to acc. |
2 |
12 |
| MOV Rn, A |
move acc. to
register |
1 |
12 |
| MOV Rn, direct |
move direct byte to
register |
2 |
24 |
| MOV Rn, #data |
move immediate data
to register |
2 |
12 |
| MOV direct, A |
move acc. to direct
byte |
2 |
12 |
| MOV direct, Rn |
move register to
direct byte |
2 |
24 |
| MOV direct, direct |
move direct byte to
direct byte |
3 |
24 |
| MOV direct, @Ri |
move indirect RAM
to direct byte |
2 |
24 |
| MOV direct, #data |
move immediate data
to direct byte |
3 |
24 |
| MOV @Ri, A |
move acc. to
indirect RAM |
1 |
12 |
| MOV @Ri, direct |
move direct byte to
indirect RAM |
2 |
24 |
| MOV @Ri, #data |
move immediate data
to indirect RAM |
2 |
12 |
| MOV DPTR, #data16 |
load Data Pointer
with a 16-bit constant |
3 |
24 |
| MOVC A, @A+DPTR |
move code byte
relative to DPTR to acc. |
1 |
24 |
| MOVC A, @A+PC |
move code byte
relative to PC to acc. |
1 |
24 |
| MOVX A, @Ri |
move external RAM
(8-bit address) to acc. |
1 |
24 |
| MOVX A, @DPTR |
move external RAM
(16-bit address) to acc. |
1 |
24 |
| MOVX @Ri, A |
move acc. to
external RAM (8-bit address) |
1 |
24 |
| MOVX @DPTR, A |
move acc. to
external RAM (16-bit address) |
1 |
24 |
| PUSH direct |
push direct byte
onto stack |
2 |
24 |
| POP direct |
pop direct byte
from stack |
2 |
24 |
| XCH A, Rn |
exchange register
with acc. |
1 |
12 |
| XCH A, @Ri |
exchange indirect
RAM with acc. |
1 |
12 |
| XCHD A, @Ri |
exchange low-order
digit indirect RAM with acc. |
1 |
12 |
| Boolean variable
manipulation |
| mnemonic |
description |
byte |
cycle |
| CLR C |
clear carry |
1 |
12 |
| CLR bit |
clear direct bit |
2 |
12 |
| SETB C |
set carry |
1 |
12 |
| SETB bit |
set direct bit |
2 |
12 |
| CPL C |
complement carry |
1 |
12 |
| CPL bit |
complement direct
bit |
2 |
12 |
| ANL C, bit |
AND direct bit to
carry |
2 |
24 |
| ANL C, /bit |
AND complement of
direct bit to carry |
2 |
24 |
| ORL C, bit |
OR direct bit to
carry |
2 |
24 |
| ORL C, /bit |
OR complement of
direct bit to carry |
2 |
24 |
| MOV C, bit |
move direct bit to
carry |
2 |
12 |
| MOV bit, C |
move carry to
direct bit |
2 |
24 |
| JC rel |
jump if carry is
set |
2 |
24 |
| JNC rel |
jump if carry is
not set |
2 |
24 |
| JB bit, rel |
jump if direct bit
is set |
3 |
24 |
| JNB bit, rel |
jump if direct bit
is not set |
3 |
24 |
| JBC bit, rel |
jump if direct bit
is set & clear bit |
3 |
24 |
| program
branching |
| mnemonic |
description |
byte |
cycle |
| ACALL addr11 |
absolute subroutine
call |
2 |
24 |
| LCALL addr16 |
long subroutine
call |
3 |
24 |
| RET |
return from
subroutine |
1 |
24 |
| RETI |
return from
interrupt |
1 |
24 |
| AJMP addr11 |
absolute jump |
2 |
24 |
| LJMP addr16 |
long jump |
3 |
24 |
| SJMP |
short jump
(relative addr) |
2 |
24 |
| JMP @A+DPTR |
jump indirect
relative to DPTR |
1 |
24 |
| JZ rel |
jump if acc. is
zero |
2 |
24 |
| JNZ rel |
jump if acc. in not
zero |
2 |
24 |
| CJNE A, direct, rel |
compare direct byte
to acc. and jump if not equal |
3 |
24 |
| CJNE A, #data, rel |
compare immediate
data to acc. and jump if not equal |
3 |
24 |
| CJNE Rn, #data, rel |
compare immediate
data to register and jump if not equal |
3 |
24 |
| CJNE @Ri, #data, rel |
compare immediate
data to indirect and jump if not equal |
3 |
24 |
| DJNZ Rn, rel |
decrement register
and jump if not zero |
3 |
24 |
| DJNZ direct, rel |
decrement direct
byte and jump if not zero |
3 |
24 |
| NOP |
no operation |
1 |
12 |
|
