Central Processor Unit (CPU)
Instruction Set Summary
MC68HC908MR16/MC68HC908MR32 — Rev. 4.0 Advance Information
MOTOROLA Central Processor Unit (CPU) 79
6.8 Instruction Set Summary

Table 6-1 provides a summary of the M68HC08 instruction set.

Table 6-1. Instruction Set Summary (Sheet 1 of 8)

Source
Form Operation Description
Effect
on CCR
Address
Mode
Opcode
Operand
Cycles
VHI NZC
ADC #opr
ADC opr
ADC opr
ADC opr,X
ADC opr,X
ADC ,X
ADC opr,SP
ADC opr,SP
Add with Carry A (A) + (M) + (C) 
IMM
DIR
EXT
IX2
IX1
IX
SP1
SP2
A9
B9
C9
D9
E9
F9
9EE9
9ED9
ii
dd
hh ll
ee ff
ff
ff
ee ff
2
3
4
4
3
2
4
5
ADD #opr
ADD opr
ADD opr
ADD opr,X
ADD opr,X
ADD ,X
ADD opr,SP
ADD opr,SP
Add without Carry A (A) + (M) 
IMM
DIR
EXT
IX2
IX1
IX
SP1
SP2
AB
BB
CB
DB
EB
FB
9EEB
9EDB
ii
dd
hh ll
ee ff
ff
ff
ee ff
2
3
4
4
3
2
4
5
AIS #opr Add Immediate Value (Signed) to SP SP (SP) + (16 « M) ––––––IMM A7 ii 2
AIX #opr Add Immediate Value (Signed) to H:X H:X (H:X) + (16 « M) ––––––IMM AF ii 2
AND #opr
AND opr
AND opr
AND opr,X
AND opr,X
AND ,X
AND opr,SP
AND opr,SP
Logical AND A (A) & (M) 0 
IMM
DIR
EXT
IX2
IX1
IX
SP1
SP2
A4
B4
C4
D4
E4
F4
9EE4
9ED4
ii
dd
hh ll
ee ff
ff
ff
ee ff
2
3
4
4
3
2
4
5
ASL opr
ASLA
ASLX
ASL opr,X
ASL ,X
ASL opr,SP
Arithmetic Shift Left
(Same as LSL) ––
DIR
INH
INH
IX1
IX
SP1
38
48
58
68
78
9E68
dd
ff
ff
4
1
1
4
3
5
ASR opr
ASRA
ASRX
ASR opr,X
ASR opr,X
ASR opr,SP
Arithmetic Shift Right ––
DIR
INH
INH
IX1
IX
SP1
37
47
57
67
77
9E67
dd
ff
ff
4
1
1
4
3
5
BCC rel Branch if Carry Bit Clear PC (PC) + 2 + rel ? (C) = 0 REL 24 rr 3
C
b0
b7
0
b0
b7
C