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參數(shù)資料
| 型號： | μPD78064B |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 Bit Single Chip Microcontrollers |
| 中文描述： | 8位單片機微控制器 |
| 文件頁數(shù)： | 35/64頁 |
| 文件大小： | 391K |
| 代理商： | ΜPD78064B |
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35
μ
PD78064B
X1
X2
IC
C1
C2
X1
X2
IC
C1
C2
μ
PD74HCU04
X1
X2
MAIN SYSTEM CLOCK OSCILLATOR CHARACTERISTICS (T
A
= –40 to +85
°
C, V
DD
= 2.0 to 6.0 V)
Resonator
Recommended circuit
Parameter
Test conditions
MIN.
TYP.
MAX.
Unit
Ceramic
Oscillation
V
DD
= Oscillation
1
5
MHz
resonator
frequency (f
X
)
Note 1
voltage range
Oscillation
After V
DD
reaches oscillation
4
ms
stabilization time
Note 2
voltage range MIN.
Crystal
Oscillation
1
5
MHz
resonator
frequency (f
X
)
Note 1
Oscillation
V
DD
= 4.5 to 6.0 V
10
ms
stabilization time
Note 2
30
External clock
X1 input
1.0
5.0
MHz
frequency (f
X
)
Note 1
X1 input
85
500
ns
high-/low-level width
(t
XH
, t
XL
)
Notes
1.
Indicates only oscillator characteristics. Refer to
AC CHARACTERISTICS
for instruction execution time.
2.
Time required to stabilize oscillation after reset or STOP mode release.
Cautions 1.
When using the main system clock oscillator, wiring in the area enclosed with the dotted line
should be carried out as follows to avoid an adverse effect from wiring capacitance.
Wiring should be as short as possible.
Wiring should not cross other signal lines.
Wiring should not be placed close to a varying high current.
The potential of the oscillator capacitor ground should be the same as V
SS
.
Do not ground it to the ground pattern in which a high current flows.
Do not fetch a signal from the oscillator.
2.
If the main system clock oscillator is operated by the subsystem clock when the main system
clock is stopped, reswitching to the main system clock should be performed after the oscillation
stabilization time has been obtained by the program.
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