參數(shù)資料
型號(hào)： M34501M4
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述： 單芯片4位微機(jī)的CMOS
文件頁數(shù)： 37/113頁
文件大?。?/td> 1252K
代理商： M34501M4
37
4501 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 34 Power-on reset circuit example
Name
D
0
, D
1
D
2
/C, D
3
/K
P0
0
, P0
1
, P0
2
, P0
3
P1
0
, P1
1
, P1
2
/CNTR, P1
3
/INT
P2
0
/A
IN0
, P2
1
/A
IN1
Notes 1: Output latch is set to
“
1.
”
2: Pull-up transistor is turned OFF.
Function
D
0
, D
1
D
2
, D
3
P0
0
–
P0
3
P1
0
–
P1
3
P2
0
, P2
1
State
High-impedance (Note 1)
High-impedance (Notes 1, 2)
High-impedance (Notes 1, 2)
High-impedance (Notes 1, 2)
High-impedance (Notes 1, 2)
(1) Power-on reset
Reset can be automatically performed at power on (power-on re-
set) by the built-in power-on reset circuit. When the built-in
power-on reset circuit is used, the time for the supply voltage to
rise from 0 V to 2.0 V must be set to 100
μ
s or less. If the rising
time exceeds 100
μ
s, connect a capacitor between the RESET pin
and V
SS
at the shortest distance, and input
“
L
”
level to RESET pin
until the value of supply voltage reaches the minimum operating
voltage.
Table 14 Port state at reset
R
E
S
E
T
p
i
n
WEF
W
a
t
c
h
d
o
g
r
e
s
e
t
s
i
g
n
a
l
(
N
o
t
e
1
)
P
u
l
l
-
u
p
t
r
a
n
s
i
s
t
o
r
(
N
o
t
e
1
)
P
o
w
e
r
-
o
n
r
e
s
e
t
c
i
r
c
u
i
t
V
o
l
g
a
t
e
d
r
o
p
d
e
t
e
c
t
i
o
n
c
i
r
c
u
i
t
V
D
D
(
N
o
t
e
3
)
1
0
0
μ
s
o
r
l
e
s
s
(
N
o
t
e
2
)
I
n
t
e
r
n
a
l
r
e
s
e
t
s
i
g
n
a
l
P
o
w
e
r
-
o
n
Reset released
I
n
t
e
r
n
a
l
r
e
s
e
t
s
i
g
n
a
l
R
s
e
t
a
s
e
t
e
t
N
o
t
e
s
1
2
3
:
:
:
T
t
e
a
t
h
n
l
u
h
i
s
t
i
e
a
r
s
l
o
e
y
t
f
c
m
o
s
o
b
R
u
m
o
E
p
m
l
S
l
y
e
r
e
E
n
p
T
v
d
r
e
p
o
l
e
s
i
t
a
d
e
n
g
o
n
m
e
p
t
s
u
t
e
a
s
a
t
t
t
p
b
h
i
n
a
e
e
g
r
a
V
D
m
c
o
s
i
t
D
n
i
n
i
c
o
u
i
t
d
r
i
m
o
o
l
d
e
n
e
s
v
s
.
A
K
o
p
e
r
p
e
m
l
p
i
e
o
d
t
h
r
e
e
p
o
v
o
s
a
.
.
l
p
o
r
i
m
d
u
e
f
e
i
Power-on reset circuit output
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