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參數(shù)資料
| 型號(hào)： | μPD78056F |
| 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(jī)微控制器 |
| 文件頁(yè)數(shù)： | 38/76頁(yè) |
| 文件大小： | 571K |
| 代理商： | ΜPD78056F |
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38
μ
PD78056F, 78058F
Main System Clock Oscillation Circuit Characteristics (T
A
= –40 to 85
°
C, V
DD
= 2.7 to 6.0 V)
Recommended
Circuit
TYP.
MAX.
5.0
4
5.0
10
30
5.0
500
Unit
MHz
ms
MHz
ms
MHz
ns
Resonator
Ceramic
resonator
Crystal
resonator
External
clock
Parameter
Oscillator
frequency (f
X
)
Note 1
Oscillation
stabilization time
Note 2
Oscillator
frequency (f
X
)
Note 1
Oscillation
stabilization time
Note 2
X1 input
frequency (f
X
)
Note 1
X1 input
high/low level width
(t
XH
, t
XL
)
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.
MIN.
1.0
1.0
1.0
85
Test Conditions
V
DD
= Oscillator
voltage range
After V
DD
reaches oscil-
lator voltage range MIN.
V
DD
= 4.5 to 6.0 V
X1
IC
X2
C2
C1
X1
X2
μ
PD74HCU04
XT2
XT1
IC
R1
C4
C3
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