參數(shù)資料
型號: M38503E4SS
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機(jī)
文件頁數(shù): 36/86頁
文件大?。?/td> 1193K
代理商: M38503E4SS
36
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 41 Structure of MISRG
[MISRG (MISRG)] 0038
16
MISRG consists of three control bits (bits 1 to 3) for middle-speed
mode automatic switch and one control bit (bit 0) for oscillation
stabilizing time set after STP instruction released.
By setting the middle-speed mode automatic switch start bit to
1
while operating in the low-speed mode and setting the middle-
speed mode automatic switch set bit to
1
, X
IN
oscillation
automatically starts and the mode is automatically switched to the
middle-speed mode.
Fig. 42 System clock generating circuit block diagram (Single-chip mode)
M
(
M
I
S
I
R
S
G
G
R
:
a
d
d
r
e
s
s
0
0
3
8
1
6
)
O
r
e
0
s
l
:
c
e
A
A
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l
s
t
F
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t
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6
m
o
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b
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2
h
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7
b
0
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:W
t
c
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.
-
m
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i
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d
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e
o
,
m
t
a
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a
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h
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h
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w
r
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a
s
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p
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e
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m
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0
d
3
e
B
1
t
o
6
)
h
i
e
d
h
l
C
r
(
s
g
Not used (return
0
when read)
Middle-speed mode automatic switch start bit
(Depending on program)
0: Invalid
1: Automatic switch start
Middle-speed mode automatic switch wait time set bit
0: 4.5 to 5.5 machine cycles
1: 6.5 to 7.5 machine cycles
Middle-speed mode automatic switch set bit
0: Not set automatically
1: Automatic switching enable
WIT instruction
STP instruction
Timing
φ
(internal clock)
S
R
Q
S
T
P
i
n
s
t
r
u
c
t
i
o
n
S
R
Q
M
a
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n
c
l
o
c
k
s
t
o
p
b
i
t
S
R
Q
1
/
2
1/4
X
IN
X
O
U
T
X
COUT
X
C
I
N
In
t
e
r
r
u
p
t
r
e
q
u
e
s
t
R
e
g
s
e
t
In
t
e
r
r
u
p
t
d
i
s
a
b
l
e
f
l
a
l
1/2
Port X
switch bit
1
0
L
o
w
-
s
p
e
e
d
m
o
d
e
High-speed or
middle-speed
mode
Middle-speed mode
High-speed or
low-speed mode
Main clock division ratio
selection bits
(Note 1)
N
o
t
e
s
1
:
A
W
W
n
h
h
y
e
e
o
n
n
n
l
e
o
b
w
i
t
o
f
s
h
p
o
i
g
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f
h
e
M
-
d
I
s
S
p
m
R
e
o
G
e
d
d
e
=
,
m
i
s
0
i
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e
-
s
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d
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,
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t
i
s
4
s
)
e
t
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e
c
t
e
d
.
b
y
b
i
t
s
7
a
n
d
6
o
f
t
h
e
C
P
U
m
o
d
e
r
e
g
i
s
t
e
r
.
-
0
l
c
o
X
(
b
o
1
2
:
M
s
a
l
i
e
n
c
c
t
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l
o
n
c
k
b
i
d
t
i
v
(
i
N
s
i
o
o
n
t
r
a
1
t
)
i
o
e
o
s
e
FF
16
01
16
Prescaler 12
T
i
m
e
r
1
Reset or
STP instruction
(Note 2)
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