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參數(shù)資料
| 型號： | UPD17228MC |
| 廠商： | NEC Corp. |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機的小型通用紅外遙控器 |
| 文件頁數(shù)： | 67/84頁 |
| 文件大?。?/td> | 393K |
| 代理商： | UPD17228MC |
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μ
PD17225, 17226, 17227, 17228
67
Data Sheet U12643EJ2V0DS00
System Clock Oscillator Characteristics (T
A
= –40 to +85
°
C, V
DD
= 2.0 to 3.6 V)
Resonator
Recommended
Constants
Item
Conditions
MIN.
TYP.
MAX.
Unit
Ceramic
resonator
Oscillation frequency
(f
X
)
Note 1
1.0
4.0
8.0
MHz
Oscillation
stabilization time
Note 2
After V
DD
reached MIN.
in oscillation voltage
range
4
ms
Notes 1.
The oscillation frequency only indicates the oscillator characteristics.
2.
The oscillation stabilization time is necessary for oscillation to be stabilized, after V
DD
application or
STOP mode release.
Caution To use a system clock oscillator circuit, perform the wiring in the area enclosed by the dotted
line in the above figure as follows, to avoid adverse wiring capacitance influences:
Keep wiring length as short as possible.
Do not cross a signal line with some other signal lines. Do not route the wiring in the vicinity
of lines through which a large current flows.
Always keep the oscillator circuit capacitor ground at the same potential as GND. Do not
ground the capacitor to a ground pattern, through which a large current flows.
Do not extract signals from the oscillator circuit.
External circuit example
X
IN
X
OUT
X
IN
X
OUT
R1
C2
C1
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