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USER’S GUIDE
050396 167/173
168
SECTION 19: INSTRUCTION SET DETAILS
MNEMONIC
INSTRUCTION CODE
HEX
BYTE
CYCLE
EXPLANATION
MNEMONIC
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
HEX BYTE CYCLE EXPLANATION
ADD A, Rn 0 0 1 0 1 n
2
n
1
n
0
28–2F 1 1 (A) = (A) + (Rn)
ADD A, direct 0
a
7
0
a
6
1
a
5
0
a
4
0
a
3
1
a
2
0
a
1
1
a
0
25
Byte 2
2 1 (A) = (A) + (direct)
ADD A, @Ri 0 0 1 0 0 1 1 i 26–27 1 1 (A) = (A) + ((Ri))
ADD A, #data 0
d
7
0
d
6
1
d
5
0
d
4
0
d
3
1
d
2
0
d
1
0
d
0
24
Byte 2
2 1 (A) = (A) + #data
ADDC A, Rn 0 0 1 1 1 n
2
n
1
n
0
38–3F 1 1 (A) = (A)+(C)+(Rn)
ADDCA,direct 0
a
7
0
a
6
1
a
5
1
a
4
0
a
3
1
a
2
0
a
1
1
a
0
35
Byte 2
2 1 (A) =
(A)+(C)+(direct)
ADDC A, @Ri 0 0 1 1 0 1 1 i 36–37 1 1 (A) = (A)+(C)+((Ri))
ADDC A,#data 0
d
7
0
d
6
1
d
5
1
d
4
0
d
3
1
d
2
0
d
1
0
d
0
34
Byte 2
2 1 (A) = (A)+(C)+#data
SUBB A, Rn 1 0 0 1 1 n
2
n
1
n
0
98–9F 1 1 (A) = (A)–(C)–(Rn)
A
TION
SUBB A,direct 1
a
7
0
a
6
0
a
5
1
a
4
0
a
3
1
a
2
0
a
1
1
a
0
95
Byte 2
2 1 (A) =
(A)–(C)–(direct)
PER
A
SUBB A, @Ri 1 0 0 1 0 1 1 i 96–97 1 1 (A) = (A)–(C)–((Ri))
M
ETIC O
P
SUBB A,#data 1
d
7
0
d
6
0
d
5
1
d
4
0
d
3
1
d
2
0
d
1
0
d
0
94
Byte 2
2 1 (A) = (A)-(C)-#data
I
TH
M
INC A 0 0 0 0 0 1 0 0 04 1 1 (A) = (A) + 1
ARI
T
INC Rn 0 0 0 0 1 n
2
n
1
n
0
08–0F 1 1 (Rn) = (Rn) + 1
INC direct 0
a
7
0
a
6
0
a
5
0
a
4
0
a
3
1
a
2
0
a
1
1
a
0
05
Byte 2
2 1 (direct) = (direct)+1
INC @Ri 0 0 0 0 0 1 1 i 06–07 1 1 ((Ri)) = ((Ri)) + 1
INC DPTR 1 0 1 0 0 0 1 1 A3 1 2 (DPTR)=(DPTR)+1
DEC A 0 0 0 1 0 1 0 0 14 1 1 (A) = (A) – 1
DEC Rn 0 0 0 1 1 n
2
n
1
n
0
18–1F 1 1 (Rn) = (Rn) – 1
DEC direct 0
a
7
0
a
6
0
a
5
1
a
4
0
a
3
1
a
2
0
a
1
1
a
0
15
Byte 2
2 1 (direct) = (direct)–1
DEC @Ri 0 0 0 1 0 1 1 i 16–17 1 1 ((Ri)) = ((Ri)) –1
MUL AB 1 0 1 0 0 1 0 0 A4 1 4 (B
15–8
), (A
7–0
)
= (A) X (B)
DIV AB 1 0 0 0 0 1 0 0 84 1 4 (A
15–8
), (A
7–0
)
= (A)B(B)