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參數(shù)資料
| 型號(hào)： | M34282E2 |
| 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)： | 21/70頁 |
| 文件大小： | 560K |
| 代理商： | M34282E2 |
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MITSUBISHI
ELECTRIC
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
21
MITSUBISHI MICROCOMPUTERS
4282 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Fig. 25 Clock control circuit structure
System clock signal f(X
IN
) is obtained by externally connecting a
ceramic resonator. Connect this external circuit to pins X
IN
and
X
OUT
at the shortest distance as shown Figure 26.
A feedback resistor is built-in between X
IN
pin and X
OUT
pin.
ROM ORDERING METHOD
Please submit the information described below when ordering
Mask ROM.
(1) Mask ROM Order Confirmation Form.................................1
(2) Data to be written into mask ROM.......................... EPROM
(three sets containing the identical data)
(3) Mark Specification Form .................................................... 1
Fig. 26 Ceramic resonator external circuit
CLOCK CONTROL
The clock control circuit consists of the following circuits.
System clock generating circuit
Control circuit to stop the clock oscillation
Control circuit to return from the RAM back-up state
O
S
C
R
S
Q
P
O
F
i
n
s
t
r
u
c
t
i
o
n
X
I
N
X
O
U
T
Ports E
0
,E
1
,G
0
–
G
3
Pull-down control
register PU0
P
o
r
t
E
2
Internal clock
generation circuit
(divided by 4)
F
d
(
r
e
v
i
v
q
d
i
u
e
d
e
r
e
n
c
y
i
i
d
d
b
y
8
)
CCK instruction
S
T
C
K
IN
S
T
C
K
In
t
e
r
n
a
l
p
o
w
e
r
-
o
n
r
e
s
e
t
c
i
r
c
u
i
t
Ports D
4
–
7
Pull-down control
register 1
Multi-
plexer
4282
X
IN
4
X
OUT
C
IN
C
OUT
5
Use the resonator
manufacturer
’
s
recommended value
because constants
such as capacitance
depend on the
resonator.
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