0000H
FFFFH
0000H
FFFFH
00H
FFH
7i u
êù? u
? ?
u
SFR
20H
30H
80H
E0H
A
MSC51i% ￥?
ROM = RAM ? RAM
? 3c MCS51·
7"d
·
7￥ì
T
LOOP: MOV A, R0 ;| R0￥ = ?
? A
[S| ] ?T
? ?B?T
? ?=?T
? [?
d ]
"￥?T
?
÷?T
?
? ? ?￥ = ??
^A?￥
3.2
? .
{ ?·
7
1. [ ?F A1 "￥?T
?￥·
7
MOV A, data A odata
MOV A, R
n
n=0~7A o(R
n
)
MOV A, @R
i
i=0,1 A o((R
i
))
MOV A, direct A o(direct) direct1 =? RAM SFR1?
?
MOV A, @R
i
[ R
i
￥ = ?11? ü?1??￥ = ?
??
A? ? b A o((R
i
))
MOV A, R0 | R0￥ = ?
?? A ? bA o(R
0
)
MOV A, #20H ; (A) = 20H A￥ = ?1 20H
MOV A, 20H ; (A) = (20H) A￥ = ?1 20H?￥ = ?
?i[
F·
7￥?]?
è . 0 7 " ! 3 " ← 3
?H·
7V
UV 3
?s?÷?T
?
? ?í￥1?ü?1??￥ =
?.
?ó " ib1?￥7i ?1
W?7i
40H
A
34H 40H
R0 34H
…
…
40H
!·
73? - 3
)
)
)
3?·
7a "
2. [ R
n
1 "￥?T
?￥·
7
MOV R
n
A R
n
o(A)
n=0~7
MOV R
n
direct R
n
o(direct)
MOV R
n
data R
n
odata
3.[°¤1?1 "￥?T
?￥·
7
MOV direct, A direct o (A)
MOV direct, R
n
direct o (R
n
)
n=0~7
MOV direct, @R
i
direct o (( Ri))
i=0,1
MOV direct, direct direct o (direct)
MOV direct, #data direct odata
4. [7i W¤1?1 "￥?T
?·
7
MOV @R
i
A ((R
i
)) o(A) i=0,1
MOV @R
i
direct ((R
i
)) o(direct)
MOV @R
i
data ((R
i
)) odata
?¨ è 1
MOV P1, #0FEH ; 11111110B
V[
P P1.0
￥?;= 5?
MOV P1, #0F0H ; 11110000B
V[
P P1 g
￥
? 4??;=
5?
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
5v
8
?
?5A
U
P1.0 a
P1.1 b
P1.2 c
P1.3 d
P1.4 e
P1.5 f
P1.6 g
P1.7 dp
5v
MOV P1, #00H ; A
U 8.
MOV P1, #0F8H ; A
U 7
MOV P1, #88H ; A
U A
?¨ è 2
B???￥ú?è ü V[YV “;èò? ” e??
è V7[ “ Dè ” e? “ <è ” b
3.1 ù?Z
T
·
7￥ì
T
LOOP: MOV A, R0 ;| R0￥ = ?
? A
[S| ] ?T
? ?B?T
? ?=?T
? [?
d ]
"￥?T
?
÷?T
?
ù?Z
T ùs
???T
?
? ?í1?￥Z
T b
ù?Z
T 9
?ù? ? ? <?·
7"d9 ˉ b
a
ü [/)
?￥ù?Z
T?
^?÷?T
?￥ b?
L=
"
￥?T
?9μù?ù5 b
3.1.1 7i ù? MOV A, Rn
?T
? 7i ? ? R0~R7A aB aCy
ê a DPTR
3.1.2 °¤ù? MOV A, 40H
?T
?°¤[?í1??
Tó
9 V[7i ??
Tó? A B DPTR "?
? MOV A, P0 MOV R0, TH0
3.1.3 7i W¤ù? MOV A, @R1
?T
?
^YV7i W¤¤?￥ b
3.1.4 ?'ù? MOV A, #40H
?T
? ·
7?°¤ó b
3.1.5 ?7i FM?7i ù?
[ DPTR PC1?7i [ A1M?7i
[
?MF??￥ 16ê1?1?T
?￥1? b
MOVC A, @A+DPTR
MOVC A, @A+PC
5. 16ê
? .
{·
7
MOV DPTR, #data16 DPTR odata16
DPTR----
? ·?1 SFR? DPH aDPL
MOV DPTR, #2010H
M?? MOV DPH, #20H
MOV DPL, #10H
6. \?T·
7
é\·
7 PUSH direct
? : (SP)=60H, (A)=30H ,(B)=70H
H3?
PUSH Acc (SP)+1=61H 1SP, (A) 1 61H
PUSH B (SP)+1=62H 1SP, (B) 1 62H
2T : (61H)=30H, (62H)=70H, (SP)=62H
(SP+3)
(SP+2)
(SP)
(SP+1)
|\·
7 POP direct
? : (SP)=62H, (62H)=70H ,(61H)=30H
H3?
POP DPH ((SP)) 1DPH, (SP)1=61H 1SP
POP DPHL ((SP)) 1DPL, (SP)1=60H 1SP
2T : (DPTR)=7030H, (SP)=60H
\￥i%e5 5éa
7. ?F AD??
? .
{·
7
MOVX A, @DPTR A o((DPTR))
1?S? 64K
MOVX A, @R
i
A o((Ri))
1?S? 0 j255
MOVX @DPTR, A ((DPTR)) o(A)
MOVX @R
i
, A ((Ri)) o(A)
8. °V·
7
1 MOVC A, @A+DPTR A o((A)+(DPTR))
è : (DPTR)=0300H,
A" 02H
ROM? (0302H)=55H
3?
MOVC A, @A+DPTR
2T (A)=55H
2 MOVC A, @A+PC
A o((A)+(pc))
PC??·?·_/BH·
7￥1?
è ? A?￥ = ?
0 j9° üZV
MOVC A, @A+PC è0
? 1?
? ÷??
ORG 0000H
0000 7403 MOV A, #03H
0002 83 MOVC A, @A+PC
0003 00 DB 00H
0004 01 DB 01H
0005 04 DB 04H
0006 09 DB 09H
0007 10 DB 10H
0008 19 DB 19H
0009 24 DB 24H
000A 31 DB 31H
000B 40 DB 40H
000C 51 DB 51H
¨L?3 ??°
? END
9. 3??D·
7
XCH A , R
n
(A) o 1(Ri)
XCH A , direct
(A) o 1(direct)
XCH A , @R
i
(A) o 1(Ri)
è (A)=80H, (R7)=97H
3? XCH A , R
7
2T (A)=97H, (R7)=80H
è | ? = 3 " . )?íD )?í￥
? ?D b
9 $ ) ) ) o
?$
5
/
·
7
^?p ?p h??
1MOV A#1000H A o1000H
2MOVX A1000H A o(1000H) ?? RAM
3MOVC A1000H A o(1000H) ?? ROM
4MOVX 60HA ?? RAM(60H) oA
5MOV R060H ? = RAM (61H) o(60H
MOV 61H@R0
6. XCH R1R2 R1 o 1R2
7. MOVX DPTR#2000H DPTR o2000H
8. MOVX 60H@DPTR ? = RAM o ?? RAM
10.?3??D·
7
XCHD A, @R
i
(A)0-3 o 1((Ri )) 0-3
è (R
0
)=60H, (60H)=3EH, (A)=59H
3? XCHD A, @R
0
2T
A"5E H
60H" 39 H
3.2.2
?
??T ?·
7
1. FE·
7
Addtion
2. {éêFE·
7
3. F 1·
7
Increase
4.
Eé???·
7
5. {1êhE·
7
Subtraction
6. h 1·
7
Decrease
7. eE·
7
Multiplication
8. "E·
7
Division
1. FE·
7
Addtion
ADD A, R
n
A o (A) + (R
n
)
ADD A, @R
i
A o (A) + ((R
i
))
ADD A, direct A o (A)+(direct)
ADD A, data A o (A)+#data
S?ê￥?Y
C
y
------ éêê
AC ------ ?éêê
OV ------ nê
PSW7i
$ Z " $ ' 3 4 3 4 0 7 i 1
$ Z éêS?ê
" $ ￡ùéêS?ê
' ¨?
P¨￥S?ê
0 7 nS?ê
1 }S?ê
"?
? ￥ }? b? ￥?
?1
? 1 ?5 1 b
3 4 3 4
u 1? ) j )
u 1? ) j ' )
u 1? ) j )
u 1? ) j ' )
2. {éêFE·
7
ADDC A, R
n
A o(A)+(R
n
)+(C
y
)
ADDC A, @R
i
A o(A)+((R
i
)) +(C
y
)
ADDC A, direct A o (A)+(direct) +(C
y
)
ADDC A, data A o (A)+#data +(C
y
)
S?ê￥?YD ADDM]
3. F 1·
7
INC A A o(A)+1
INC R
i
Ri o (A)+1
INC direct direct o (direct)+1
INC @R
i
(Ri) o((Ri))+1
INC DPTR DPTR o(DPTR)+1
S?ê?á
3?Y
?
A" 0FFH , (C
y
)=0
3? INC A
2T
A" 00H , (C
y
)=0
4.
Eé???·
7
DA A
¨o ?? BCD
?FE·
7
? ?hE-aé
?
Eé??? b
96H 1a
ê BCD
?V
U
Eê1 9, ?ê1 6,
?
BCD
?F
MOV A, #35H
ADD A, #46H
(A)=7BH, i?
^ 81H
? DA A a
A" 81H
5. {1êhE·
7
Subtraction
SUBB A, R
n
A o (A)-(R
n
)-(C
y
)
SUBB A, @R
i
A o (A)-((R
i
)) -(C
y
)
SUBB A, direct A o (A)-(direct) -(C
y
)
SUBB A, data A o (A)-#data -(C
y
)
S?ê￥?Y
C
y
------ éêê
AC ------ ?éêê
OV ------ nê
6. h 1·
7
Decrease
DEC A A o(A)1
DEC R
i
Ri o (A)1
DEC direct direct o (direct)1
DEC @R
i
(Ri) o((Ri))1
S?ê?á
3?Y
?
A" 00H , (C
y
)=0
3? DEC A
2T
A" 0FFH , (C
y
)=0
í DEC DPTR ·
7
7. eE·
7
Multiplication
MUL AB (A) ?(B) ? 8ê 1 A
ú 8ê 1 B
A aB??
^í?|?
?
?Tv? 255OV"1?5 OV"0
éêS?9
^ b
, C
y
"0
8. "E·
7
Division
DIV AB (A) ?(B)
1A
?
? 1 B
A aB??
^í?|?
?
?T"
? B1“0”OV"1?5 OV"0
éêS?9
^ b
, C
y
"0
3.2.3
?
?·
7
1. e?
? ?T·
7
CLR A A o “0”
CPL A A o A
SWAP A A
0~3
A
4~7
è : (A)=3AH, CPL A, (A)=0C5H
0011 1010B 1 1100 0101B
(A)=3AH, SWAP A, (A)=0A3H
?
2. ?ì·
7
P?ì·
7
Rotate Accumulator Left
RL A
è
A" 6CH = 0110 1100B
RL A
(A)=1101 1000B=0D8H
a
7
o a
0
C
{éêP?ì·
7
Rotate Accumulator
Left through Carry flag
RLC A
è
A" 6CH = 0110 1100B (C) =1
RLC A
(A)=1101 1001B=0D9H
a
7
o a
0
C
·?ì·
7
Rotate Accumulator Right
RR A
è
A" 6CH = 0110 1100B
RR A
(A)=0011 0110B=36H
a
7
o a
0
C
{éê·?ì·
7
Rotate A Right with C
RRC A
è
A" 6CH = 0110 1100B (C) =1
RRC A
(A)=1011 0110B=0B6H
a
7
o a
0
C
2.
? D·
7
ANL A, R
n
ANL A, direct
ANL A, data
ANL A, @R
i
ANL direct, A
ANL direct, data
? “D ” “μ 0' 0 ? 111”
0000 0111
? 1111 1101
0000 0101 B " 05H
3.
? ·
7
ORL A, R
n
ORL A, direct
ORL A, data
ORL A, @R
i
ORL direct, A
ORL direct, data
? “ ” “μ 1' 1 ? 010”
0000 0110
?0110 1101
0110 1111 B " 6FH
4.
? s·
7
XRL A, R
n
XRL A, direct
XRL A, data
XRL A, @R
i
XRL direct, A
XRL direct, data
“s ” “Ms1 1M]1 0”
0000 0110
0110 1101
0110 1011 B " 6BH
⊕
⊕
è
A =01 ? ? ? ? ? ?B ?V
U
?
?1 1 03?/
?BF·
73?
a A￥′ ?? ?
XRL A#0C0H | ?F A￥ = ? D7 aD6 |Q 0 1 ? ? ? ? ? ?
ORL A#03H | ?F A￥ = ? D1 aD0? 1 1 1 0 1 0 0 0 0
ANL A#0E7H | ?F A￥ = ? D4 aD3 b0 1 0 ? ? ? ? ? ?
0 0 0 0 0 0 1 1
1 0 ? ? ? ?1 1
1 1 1 0 0 1 1 1
1 0 ?0 0 ?1 1
3 3?
?·
7a
A =10 ?00 ?11B b
5 1 ??| ?F A?￥
? ú 4ê b 0?ê?M$
5 2 ??|7i R2?￥
?
?ê |Q }
?ê?M$
3.2.4 e?M ?·
7
1. K·
7
K·
7 AJMP addr11
PC oaddr11KS? 2k
éK·
7 LJMP addr16
PC oaddr16KS? 64k
W¤K·
7 JMP @A+DPTR
PC o
A
DPTR)
MM·
7 SJMP rel
PC o(PC)+2
PC o(PC)+rel
rel
?￥M êM
1 ê?
?
MS? - ja 3?
rel"
"￥1?M·
71?M·
73?
?
?
"
"￥1? PC? -′
?
I?
H V¨S|}9M "￥1?
rel ?óIr??9
? b
SJMP NEXT
AJMP NEXT ,SJMP NEXT
…
NEXT …
e1
÷?·
7￥·
7
) & 3 & 4 + . 1 ) & 3 &
è? 4 + . 1
1?
? ÷ ?? ?
d
ORG 0000H ? ???
S1?
0000 20 00 30 LJMP MAIN K _???
ORG 0030H ? ??
S1?
0030 C3 MAIN: CLR C MAIN1? ?S|
0031 E6 LOOP: MOV A , @R0
0032 37 ADDC A, @R1
0033 08 INC R0
0034 DA FB DJNZ R1, LOOP MM
0036 80 03 SJMP NEXT
0038 78 03 MOV R0, #03H
003A 18 NEXT: DEC R0
003B 80FE SJMP $ HERE: SJMP HERE
END ; 2
?S:
???S|D1?-W￥1"
2. HqM·
7
? JZ rel
A" 0M
? JNZ rel
A ? 0M
3. 1??M?M·
7
CJNE A#datarel (A)=#data?? C o0
(A)# #data C o0
(A)!#data C o1
+? oμ!
H C o1
CJNE Adirectrel
CJNE R
n
#datarel
CJNE @R
i
#datarel
4. h 1 ?1 0 M·
7
DJNZ Rnrel Rn o(Rn )1
(Rn ) ?0M
(Rn ) "0??
DJNZ directrel
è ü
H0??
delay MOV R7, #03H
delay0 MOV R6, #19H
delay1 DJNZ R6, delay1
DJNZ R7, delay0
RET
5. ?¨0??·
7
?¨·
7
ACALL addr11
é?¨·
7
LCALL addr16
I?
H V¨S|}9M "￥1?
addr11addr16 ?óIr??9
? b
6. 0??Rí·
7
RET
RET·
7V\? i￥ PC1?
LC0??Rí b
7. ?Rí·
7
RETI
8. b?T·
7
NOP
3.2.5 ê?T·
7
1.
? ê.
?·
7
MOV C, bit bit V°¤ù?ê C o(bit)
MOV bitC C éêê (bit) o C
è |ê1? 20H￥Bê
?.
??ê1? 30H?
MOV C20H
MOV 30HC
2. êM
??·
7
CLR C ; | C"0
CLR bit
CPL C ; | C pQ i ? C
CPL bit ; | bit pQ i ? bit
SETB C ; | C"1
SETB bit (bit) o 1
3. êM
? ·
7
ANL C, bit
ANL C, bit
ORL C, bit
ORL C, bit
4. HqM ?·
7
JC rel ? C=1, M
JNC rel ? C=0, M
JB bitrel ? bit=1, M
JNB bitrel ? bit=0, M
JBC bitrel ? bit=1, Mi bit"0
