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參數(shù)資料
| 型號(hào)： | 7560 |
| 英文描述： | 7560 Group Datasheet Datasheet 1682K/JAN.14.03 |
| 中文描述： | 7560組數(shù)據(jù)表數(shù)據(jù)表1682K/JAN.14.03 |
| 文件頁(yè)數(shù)： | 27/90頁(yè) |
| 文件大小： | 1682K |
| 代理商： | 7560 |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7560 Group
26
Key Input Interrupt (Key-on Wake Up)
The key input interrupt is enabled when any of port P2 is set to in-
put mode and the bit corresponding to key input control register is
set to
“
1
”
.
A Key input interrupt request is generated by applying
“
L
”
level
voltage to any pin of port P2 of which key input interrupt is en-
abled. In other words, it is generated when AND of input level
goes from
“
1
”
to
“
0
”
. A connection example of using a key input in-
terrupt is shown in Figure 22, where an interrupt request is gener-
ated by pressing one of the keys consisted as an active-low key
matrix which inputs to ports P2
0
–
P2
3
.
Fig. 22 Connection example when using key input interrupt and port P2 block diagram
P
l
a
o
r
t
h
P
2
0
t
c
P
d
o
i
r
e
t
c
P
t
i
2
0
o
r
n
r
e
g
i
s
t
e
r
=
“
0
”
P
l
a
o
r
t
h
P
2
1
t
c
Port P2
direction register =
“
0
”
P
l
a
o
r
t
h
P
2
2
t
c
Port P2
direction register =
“
0
”
Port P2
3
latch
Port P2
3
direction register =
“
0
”
Port P2
4
latch
Port P2
4
direction register =
“
1
”
Port P2
5
latch
Port P2
direction register =
“
1
”
P
l
a
o
r
t
h
P
2
6
t
c
P
d
o
i
r
e
t
c
P
t
i
2
6
o
r
n
r
e
g
i
s
t
e
r
=
“
1
”
Port P2
7
latch
Port P2
7
direction register =
“
1
”
P
2
0
i
n
p
u
t
P2
1
input
P2
2
input
P
2
3
i
n
p
u
t
P
2
4
o
u
t
p
u
t
P
2
5
o
u
t
p
u
t
P
2
6
o
u
t
p
u
t
P
2
7
o
u
t
p
u
t
P
U
L
L
r
e
g
i
s
t
B
e
r
i
A
7
t
Port P2
Input reading circuit
P
“
L
o
r
t
l
e
P
v
X
e
x
o
”
l
u
t
p
u
t
CMOS output buffer
P-channel transistor for pull-up
K
e
y
i
n
p
u
t
i
n
t
e
r
r
u
p
t
r
e
q
u
e
s
t
P2
7
key input control bit
P
2
6
k
e
y
i
n
p
u
t
c
o
n
t
r
o
l
b
i
t
P
2
5
k
e
y
i
n
p
u
t
c
o
n
t
r
o
l
b
i
t
P
2
4
k
e
y
i
n
p
u
t
c
o
n
t
r
o
l
b
i
t
P
2
3
k
e
y
i
n
p
u
t
c
o
n
t
r
o
l
b
i
t
=
“
1
”
P
U
L
L
r
B
e
i
g
t
i
6
s
t
=
e
r
“
1
A
”
P
2
2
k
e
y
i
n
p
u
t
c
o
n
t
r
o
l
b
i
t
=
“
1
”
P
2
1
k
e
y
i
n
p
u
t
c
o
n
t
r
o
l
b
i
t
=
“
1
”
P2
0
key input control bit =
“
1
”
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