Datasheet

Central Processing Unit (CPU)
Technical Data MC68HC908GR8 — Rev 4.0
150 Central Processing Unit (CPU) MOTOROLA
CMP #opr
CMP opr
CMP opr
CMP opr,X
CMP opr,X
CMP ,X
CMP opr,SP
CMP opr,SP
Compare A with M (A) – (M) ↕ ––↕↕↕
IMM
DIR
EXT
IX2
IX1
IX
SP1
SP2
A1
B1
C1
D1
E1
F1
9EE1
9ED1
ii
dd
hh ll
ee ff
ff
ff
ee ff
2
3
4
4
3
2
4
5
COM opr
COMA
COMX
COM opr,X
COM ,X
COM opr,SP
Complement (One’s Complement)
M
← (M) = $FF – (M)
A
← (A) = $FF – (M)
X
← (X) = $FF – (M)
M
← (M) = $FF – (M)
M
← (M) = $FF – (M)
M
← (M) = $FF – (M)
0 ––↕↕1
DIR
INH
INH
IX1
IX
SP1
33
43
53
63
73
9E63
dd
ff
ff
4
1
1
4
3
5
CPHX #opr
CPHX opr
Compare H:X with M (H:X) – (M:M + 1) ↕ ––↕↕↕
IMM
DIR
65
75
ii ii+1
dd
3
4
CPX #opr
CPX opr
CPX opr
CPX ,X
CPX opr,X
CPX opr,X
CPX opr,SP
CPX opr,SP
Compare X with M (X) – (M) ↕ ––↕↕↕
IMM
DIR
EXT
IX2
IX1
IX
SP1
SP2
A3
B3
C3
D3
E3
F3
9EE3
9ED3
ii
dd
hh ll
ee ff
ff
ff
ee ff
2
3
4
4
3
2
4
5
DAA Decimal Adjust A
(A)
10
U ––↕↕↕INH 72 2
DBNZ opr,rel
DBNZA rel
DBNZX rel
DBNZ opr,X,rel
DBNZ X,rel
DBNZ opr,SP,rel
Decrement and Branch if Not Zero
A
← (A) – 1 or M ← (M) – 1 or X ← (X) – 1
PC
← (PC) + 3 + rel ? (result) ≠ 0
PC
← (PC) + 2 + rel ? (result) ≠ 0
PC
← (PC) + 2 + rel ? (result) ≠ 0
PC
← (PC) + 3 + rel ? (result) ≠ 0
PC
← (PC) + 2 + rel ? (result) ≠ 0
PC
← (PC) + 4 + rel ? (result) ≠ 0
––––––
DIR
INH
INH
IX1
IX
SP1
3B
4B
5B
6B
7B
9E6B
dd rr
rr
rr
ff rr
rr
ff rr
5
3
3
5
4
6
DEC opr
DECA
DECX
DEC opr,X
DEC ,X
DEC opr,SP
Decrement
M
← (M) – 1
A
← (A) – 1
X
← (X) – 1
M
← (M) – 1
M
← (M) – 1
M
← (M) – 1
↕ ––↕↕–
DIR
INH
INH
IX1
IX
SP1
3A
4A
5A
6A
7A
9E6A
dd
ff
ff
4
1
1
4
3
5
DIV Divide
A
← (H:A)/(X)
H
← Remainder
––––↕↕INH 52 7
EOR #opr
EOR opr
EOR opr
EOR opr,X
EOR opr,X
EOR ,X
EOR opr,SP
EOR opr,SP
Exclusive OR M with A
A
← (A ⊕ M)
0 ––↕↕–
IMM
DIR
EXT
IX2
IX1
IX
SP1
SP2
A8
B8
C8
D8
E8
F8
9EE8
9ED8
ii
dd
hh ll
ee ff
ff
ff
ee ff
2
3
4
4
3
2
4
5
Table 10-1. Instruction Set Summary (Continued)
Source
Form
Operation Description
Effect on
CCR
Address Mode Opcode Operand Cycles
VH I NZC
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