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參數(shù)資料
| 型號： | μPD78058F(A) |
| 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)： | 38/74頁 |
| 文件大?。?/td> | 549K |
| 代理商： | ΜPD78058F(A) |
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38
μ
PD78058F(A)
Resonator
Recommended
Circuit
Parameter
Test Conditions
MIN.
TYP.
MAX.
Unit
Ceramic
resonator
Oscillator
frequency (f
X
)
Note 1
V
DD
= Oscillator voltage
range
1.0
5.0
MHz
Oscillation
stabilization time
Note 2
After V
DD
reaches oscillator
voltage range MIN.
4
ms
Crystal
resonator
Oscillator
frequency (f
X
)
Note 1
1.0
5.0
MHz
Oscillation
stabilization time
Note 2
V
DD
= 4.5 to 6.0 V
10
ms
30
External
clock
X1 input
frequency (f
X
)
Note 1
1.0
5.0
MHz
X1 input
high/low level width
(t
XH
, t
XL
)
85
500
ns
X1
IC
X2
C2
C1
X1
IC
X2
C2
C1
X1
X2
μ
PD74HCU04
Main System Clock Oscillation Circuit Characteristics (T
A
= –40 to 85
°
C, V
DD
= 2.7 to 6.0 V)
Notes
1.
Indicates only oscillation circuit 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 broken line
in the above figures 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 wiring to a ground pattern in which a high current flows.
Do not fetch a signal from the oscillator.
2. When the main system clock is stopped and the system is operated by the subsystem clock,
the subsystem clock should be switched again to the main system clock after the oscillation
stabilization time is secured by the program.
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