![](http://datasheet.mmic.net.cn/120000/MC908QF4CFJ_datasheet_3559618/MC908QF4CFJ_67.png)
Central Processor Unit (CPU)
Instruction Set Summary
MC68HC908QF4 — Rev. 1.0
Data Sheet
MOTOROLA
Central Processor Unit (CPU)
67
BRSET n,opr,rel Branch if Bit n in M Set
PC
← (PC) + 3 + rel ? (Mn) = 1
–––– –
DIR (b0)
DIR (b1)
DIR (b2)
DIR (b3)
DIR (b4)
DIR (b5)
DIR (b6)
DIR (b7)
00
02
04
06
08
0A
0C
0E
dd rr
5
BSET n,opr
Set Bit n in M
Mn
← 1
–––– ––
DIR (b0)
DIR (b1)
DIR (b2)
DIR (b3)
DIR (b4)
DIR (b5)
DIR (b6)
DIR (b7)
10
12
14
16
18
1A
1C
1E
dd
4
BSR rel
Branch to Subroutine
PC
← (PC) + 2; push (PCL)
SP
← (SP) – 1; push (PCH)
SP
← (SP) – 1
PC
← (PC) + rel
–––– –– REL
AD
rr
4
CBEQ opr,rel
CBEQA #opr,rel
CBEQX #opr,rel
CBEQ opr,X+,rel
CBEQ X+,rel
CBEQ opr,SP,rel
Compare and Branch if Equal
PC
← (PC) + 3 + rel ? (A) – (M) = $00
PC
← (PC) + 3 + rel ? (A) – (M) = $00
PC
← (PC) + 3 + rel ? (X) – (M) = $00
PC
← (PC) + 3 + rel ? (A) – (M) = $00
PC
← (PC) + 2 + rel ? (A) – (M) = $00
PC
← (PC) + 4 + rel ? (A) – (M) = $00
–––– ––
DIR
IMM
IX1+
IX+
SP1
31
41
51
61
71
9E61
dd rr
ii rr
ff rr
rr
ff rr
5
4
5
4
6
CLC
Clear Carry Bit
C
← 0
–––– –0 INH
98
1
CLI
Clear Interrupt Mask
I
← 0
––0– –– INH
9A
2
CLR opr
CLRA
CLRX
CLRH
CLR opr,X
CLR ,X
CLR opr,SP
Clear
M
← $00
A
← $00
X
← $00
H
← $00
M
← $00
M
← $00
M
← $00
0––0 1–
DIR
INH
IX1
IX
SP1
3F
4F
5F
8C
6F
7F
9E6F
dd
ff
3
1
3
2
4
CMP #opr
CMP opr
CMP opr,X
CMP ,X
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
ee ff
2
3
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
IX1
IX
SP1
33
43
53
63
73
9E63
dd
ff
4
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
Table 7-1. Instruction Set Summary (Sheet 3 of 7)
Source
Form
Operation
Description
Effect
on CCR
Address
M
ode
Opc
o
de
O
p
er
and
Cy
cl
es
VH I N Z C
F
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e
sc
a
le
S
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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