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173
EXPLANATIONCYCLEBYTEHEX
INSTRUCTION CODE
MNEMONIC EXPLANATIONCYCLEBYTEHEX
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
MNEMONIC
ACALL addr 11 a
10
a
7
a
9
a
6
a
8
a
5
1
a
4
0
a
3
0
a
2
0
a
1
1
a
0
Byte 1
Byte 2
2 2 (PC) = (PC) + 2
(SP) = (SP) + 1
((SP)) = (PC
7–0
)
(SP) = (SP) + 1
((SP)) = (PC
15–8
)
(PC)=page address
LCALL addr 16 0
a
15
a
7
0
a
14
a
6
0
a
13
a
5
1
a
12
a
4
0
a
11
a
3
0
a
10
a
2
1
a
9
a
1
0
a
8
a
0
12
Byte 2
Byte 3
3 2 (PC) = (PC) + 3
(SP) = (SP) + 1
((SP)) = (PC
7–0
)
(SP) = (SP) + 1
((SP)) = (PC
15–8
)
(PC) = addr
15–0
RET 0 0 1 0 0 0 1 0 22 1 2 (PC
15–8
) = ((SP))
(SP) = (SP) – 1
(PC
7–0
) = ((SP))
(SP) = (SP) – 1
A
NCHING
RETI 0 0 1 1 0 0 1 0 32 1 2 (PC
15–8
) = ((SP))
(SP) = (SP) – 1
(PC
7-0
) = ((SP))
(SP) = (SP) – 1
R
AM BRA
N
AJMP addr 11 a
10
a
7
a
9
a
6
a
8
a
5
0
a
4
0
a
3
0
a
2
0
a
1
1
a
0
Byte 1
Byte 2
2 2 (PC) = (PC) + 2
(PC
10-0
) =
page addr
PROG
R
LJMP addr 16 0
a
15
a
7
0
a
14
a
6
0
a
13
a
5
0
a
12
a
4
0
a
11
a
3
0
a
10
a
2
1
a
9
a
1
0
a
8
a
0
02
Byte 2
Byte 3
3 2 (PC) = addr15-0
SJMP rel 1
r
7
0
r
6
0
r
5
0
r
4
0
r
3
0
r
2
0
r
1
0
r
0
80
Byte 2
2 2 (PC) = (PC) + 2
(PC) = (PC) + rel
JMP @A +
DPTR
0 1 1 1 0 0 1 1 73 1 2 (PC) = (A) +
(DPTR)
JZ rel 0
r
7
1
r
6
1
r
5
0
r
4
0
r
3
0
r
2
0
r
1
0
r
0
60
Byte 2
2 2 (PC) = (PC) + 2
IF (A) = 0 THEN
(PC) = (PC) + rel
JNZ rel 0
r
7
1
r
6
1
r
5
1
r
4
0
r
3
0
r
2
0
r
1
0
r
0
70
Byte 2
2 2 (PC) = (PC) + 2
IF (A) 0 THEN
(PC) = (PC) + rel
JC rel 0
r
7
1
r
6
0
r
5
0
r
4
0
r
3
0
r
2
0
r
1
0
r
0
40
Byte 2
2 2 (PC) = (PC) + 2
IF (C) = 1 THEN
(PC) = (PC) + rel
JC rel 0
r
7
1
r
6
0
r
5
0
r
4
0
r
3
0
r
2
0
r
1
0
r
0
40
Byte 2
2 2 (PC) = (PC) + 2
IF (C) = 1 THEN
(PC) = (PC) + rel
JNC rel 0
r
7
1
r
6
0
r
5
1
r
4
0
r
3
0
r
2
0
r
1
0
r
0
50
Byte 2
2 2 (PC) = (PC) + 2
IF (C) 0 THEN
(PC) = (PC) + rel
JB bit, rel 0
b
7
r
7
0
b
6
r
6
1
b
5
r
5
0
b
4
r
4
0
b
3
r
3
0
b
2
r
2
0
b
1
r
1
0
b
0
r
0
20
Byte 2
Byte 3
3 2 (PC) = (PC) + 3
IF (bit) = 1 THEN
(PC) = (PC) + rel