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参数资料
| 型号： | M38C80M6-XXXFP |
| 厂商： | Mitsubishi Electric Corporation |
| 英文描述： | RES 75-OHM 1% 0.125W 200PPM THK-FILM SMD-1206 TR-7-PA |
| 中文描述： | 单芯片8位CMOS微机 |
| 文件页数： | 19/51页 |
| 文件大小： | 874K |
| 代理商： | M38C80M6-XXXFP |
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19
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C8 Group
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
Key Input Interrupt (Key-on Wake-Up)
A key input interrupt request is generated by applying
“
L
”
level to any
pin of port P2 that have been set to input mode. In other words, it is
generated when AND of input level goes from
“
1
”
to
“
0
”
. An example
of using a key input interrupt is shown in Figure 15, where an inter-
rupt request is generated by pressing one of the keys consisted as
an active-low key matrix which inputs to ports P2
0
–
P2
3
.
Fig. 15 Connection example when using key input interrupt and port P2 block diagram
Port P2
0
latch
Port P2
1
latch
Port P2
2
latch
Port P2
3
latch
Port P2
4
latch
Port P2
5
latch
Port P2
6
latch
Key input control register =
“
1
”
P
2
6
d
i
r
e
c
t
i
o
n
r
e
g
i
s
t
e
r
=
“
1
”
Port P2
7
latch
Key input control register =
“
1
”
P
2
7
d
i
r
e
c
t
i
o
n
r
e
g
i
s
t
e
r
=
“
1
”
P
2
0
i
n
p
u
t
P2
1
input
P
2
2
i
n
p
u
t
P
2
3
i
n
p
u
t
P2
4
output
P2
5
output
P2
6
output
P
2
7
o
u
t
p
u
t
P
B
U
i
L
2
L
r
e
“
g
1
i
s
t
e
r
A
t
=
”
Port P2
Input reading circuit
P
“
o
L
r
”
t
l
e
P
v
X
e
x
l
o
u
t
p
u
t
P-channel transistor for pull-up
CMOS output buffer
Key input interrupt request
K
P
r
e
y
i
n
d
s
p
i
r
e
u
e
r
t
c
=
c
t
i
o
o
“
1
n
n
”
t
r
o
l
r
e
g
i
s
t
e
r
=
“
1
”
Key input control register =
“
1
”
Port P2
direction
register =
“
1
”
Key input control register =
“
1
”
Port P2
direction
register =
“
0
”
K
e
y
i
n
p
u
t
c
o
n
t
r
o
l
r
e
g
i
s
t
e
r
=
“
1
”
Key input control register =
“
1
”
Port P2
direction
register =
“
0
”
K
P
r
e
e
2
0
g
y
d
s
i
n
i
t
e
p
r
e
r
u
c
=
t
t
i
“
c
o
0
o
n
”
n
t
r
o
l
r
e
g
i
s
t
e
r
=
“
1
”
P
o
r
t
P
o
r
t
P
o
r
t
2
5
e
g
i
t
Port P2
2
direction
register =
“
0
”
P
o
r
t
i
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