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參數(shù)資料
| 型號： | UPD75066GBA |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| 中文描述： | 4位單片機(jī) |
| 文件頁數(shù)： | 41/68頁 |
| 文件大?。?/td> | 640K |
| 代理商： | UPD75066GBA |
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41
μ
PD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)
Main System Clock Oscillator Characteristics (T
a
= –40 to +85
°
C, V
DD
= 2.7 to 6.0 V)
Recommended
Constant
Resonator
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
V
DD
= Oscilla-
tion voltage
range
1.0
5.0
Note3
MHz
Oscillation
stabilization
time
Note2
Oscillation
frequency (f
x
)
Note1
V
DD
= 4.5
to 6.0 V
Oscillation
stabilization
time
Note2
30
ms
X1 input
frequency (f
x
)
Note1
X1 input
high-/low-level
width (t
XH
, t
XL
)
100
500
ns
4
ms
1.0
5.0
Note3
MHz
Notes 1.
The oscillation frequency indicates characteristics of the oscillator only. For the instruction execution time,
refer to the AC characteristics.
2.
The oscillation stabilization time is the required time for oscillation to stabilize after the voltage level of
V
DD
reaches the MIN. value of the oscillation voltage range or releasing the STOP mode.
3.
When the oscillation frequency is “4.19 MHz < f
X
≤
5.0 MHz”, selection of “PCC = 0011” with 1 machine
cycle of less than 0.95
μ
s for instruction execution time is not possible.
Caution
If the main system clock oscillator is used, the wiring in the area indicated with broken lines in the
recommended constant illustration should be routed observing the points described below to avoid
influence of wiring capacitance, etc.
Route as short as possible.
Do not cross the wires.
Route the wires away from lines where changing high current flows.
Make the connecting point of the capacitors in the oscillation circuit to have always the same potential
as V
SS
. Do not route the connecting point to another ground pattern on the board where high current
flows.
Do not use the oscillator as a signal source of other circuits.
Ceramic
resonator
Crystal
resonator
External
clock
X1
X2
C2
C1
V
SS
X1
X2
C2
C1
V
SS
10
ms
1.0
4.19
5.0
Note3
MHz
X1
X2
PD74HCU04
μ
Oscillation
frequency (f
x
)
Note1
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