Advance Information
MC68HC908MR16/MC68HC908MR32
—
Rev. 5.0
80
Central Processor Unit (CPU)
MOTOROLA
Central Processor Unit (CPU)
BCLR
n
,
opr
Clear Bit n in M
Mn
←
0
– – – – – –
DIR (b0)
DIR (b1)
DIR (b2)
DIR (b3)
DIR (b4)
DIR (b5)
DIR (b6)
DIR (b7)
11
13
15
17
19
1B
1D
1F
dd
dd
dd
dd
dd
dd
dd
dd
4
4
4
4
4
4
4
4
BCS
rel
Branch if Carry Bit Set (Same as BLO)
PC
←
(PC) + 2 +
rel
(C) = 1
– – – – – –
REL
25
rr
3
BEQ
rel
Branch if Equal
PC
←
(PC) + 2 +
rel
(Z) = 1
– – – – – –
REL
27
rr
3
BGE
opr
Branch if Greater Than or Equal To
(Signed Operands)
PC
←
(PC) + 2 +
rel
(N
⊕
V
) = 0
– – – – – –
REL
90
rr
3
BGT
opr
Branch if Greater Than (Signed
Operands)
PC
←
(PC) + 2 +
rel
(Z)
| (N
⊕
V
) = 0
– – – – – –
REL
92
rr
3
BHCC
rel
Branch if Half Carry Bit Clear
PC
←
(PC) + 2 +
rel
(H) = 0
– – – – – –
REL
28
rr
3
BHCS
rel
Branch if Half Carry Bit Set
PC
←
(PC) + 2 +
rel
(H) = 1
– – – – – –
REL
29
rr
3
BHI
rel
Branch if Higher
PC
←
(PC) + 2 +
rel
(C) | (Z) = 0
– – – – – –
REL
22
rr
3
BHS
rel
Branch if Higher or Same
(Same as BCC)
PC
←
(PC) + 2 +
rel
(C) = 0
– – – – – –
REL
24
rr
3
BIH
rel
Branch if IRQ Pin High
PC
←
(PC) + 2 +
rel
IRQ = 1
– – – – – –
REL
2F
rr
3
BIL
rel
Branch if IRQ Pin Low
PC
←
(PC) + 2 +
rel
IRQ = 0
– – – – – –
REL
2E
rr
3
BIT #
opr
BIT
opr
BIT
opr
BIT
opr
,X
BIT
opr
,X
BIT ,X
BIT
opr
,SP
BIT
opr
,SP
Bit Test
(A) & (M)
0
– –
–
IMM
DIR
EXT
IX2
IX1
IX
SP1
SP2
A5
B5
C5
D5
E5
F5
9EE5
9ED5
ii
dd
hh ll
ee ff
ff
ff
ee ff
2
3
4
4
3
2
4
5
BLE
opr
Branch if Less Than or Equal To
(Signed Operands)
PC
←
(PC) + 2 +
rel
(Z)
| (N
⊕
V
) =
1
– – – – – –
REL
93
rr
3
BLO
rel
Branch if Lower (Same as BCS)
PC
←
(PC) + 2 +
rel
(C) = 1
– – – – – –
REL
25
rr
3
BLS
rel
Branch if Lower or Same
PC
←
(PC) + 2 +
rel
(C) | (Z) = 1
– – – – – –
REL
23
rr
3
BLT
opr
Branch if Less Than (Signed Operands)
PC
←
(PC) + 2 +
rel
(N
⊕
V
) =
1
– – – – – –
REL
91
rr
3
BMC
rel
Branch if Interrupt Mask Clear
PC
←
(PC) + 2 +
rel
(I) = 0
– – – – – –
REL
2C
rr
3
BMI
rel
Branch if Minus
PC
←
(PC) + 2 +
rel
(N) = 1
– – – – – –
REL
2B
rr
3
BMS
rel
Branch if Interrupt Mask Set
PC
←
(PC) + 2 +
rel
(I) = 1
– – – – – –
REL
2D
rr
3
Table 6-1. Instruction Set Summary (Sheet 2 of 8)
Source
Form
Operation
Description
Effect on
CCR
A
M
O
O
C
V H I N Z C