7540 Group User’s Manual
APPLICATION
2-29
2.2 Timer A
Fig. 2.2.20 Example of control procedure
(T
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“
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6
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–
(
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←
Timer X interrupt processing routine (1ms interrupt)
“
FF
16
”
“
F
F
1
6
”
1 0
C
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0
RESET
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←
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←
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(
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Processing
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“
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1 0
1 1
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p
“
0
“
F
1
1
6
”
9
1
6
”
Set timer count source set register
0
0 0
TCSS(Address 2E
16
)
T
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X
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(
X
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/
1
6
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:
N
)
TXM(Address 2B
16
)
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X
0
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2
t
B
1
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6
)
o
1
0 0
TAM(Address 1D
16
)
Timer A count start
TXM(Address 2B
16
)
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X
0
1
1
0
0
0 0
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“
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“
18
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A
Timer A count start
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1
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1
6
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:
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(
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IN
Key-on wakeup disabled
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a
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A
(
l
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w
-
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r
d
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r
)
(
A
d
d
r
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s
s
1
E
1
6
)
Set value to timer A (
Note 2
)
T
e
r
A
(
h
i
g
h
-
o
r
d
e
r
)
(
A
d
d
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s
s
1
F
1
6
)
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r
Set
“
1
”
to the timer X interrupt enable bit.
(Timer X interrupt enabled)
S
e
t
“
0
”
t
o
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t
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r
X
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q
u
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s
t
b
i
t
.
Prescaler X (Address 2C
16
)
i
e
r
X
(
A
d
d
r
Set value to timer X (
Note 3
)
T
m
e
s
s
2
D
1
6
)
S
e
t
t
i
m
e
r
X
m
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d
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r
e
g
i
s
t
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r
i
c
o
u
n
t
s
t
a
r
t
Set timer A mode register
Set timer X mode register
T
c
o
u
n
t
s
t
a
r
t
Set timer A mode register
T
i
m
e
r
A
c
o
u
n
t
s
t
o
p
Set timer X mode register
T
i
t
p
T
i
i
m
m
e
r
A
(
l
o
w
-
o
r
d
e
r
)
(
A
d
d
r
e
s
s
1
E
1
6
)
Set value to timer A (
Note 2
)
T
e
r
A
(
h
i
g
h
-
o
r
d
e
r
)
(
A
d
d
r
e
s
s
1
F
1
6
)
P
i
r
m
e
s
c
a
l
e
r
X
(
A
d
d
r
e
s
s
2
C
1
6
)
Set value to timer X (
Note 3
)
T
e
r
X
(
A
d
d
r
e
s
s
2
D
1
6
)
i
e
r
a
d
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v
i
s
i
g
v
l
u
e
P
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e