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參數(shù)資料
| 型號(hào)： | UPD753104GK |
| 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(jī)的小型通用紅外遙控器 |
| 文件頁數(shù)： | 61/90頁 |
| 文件大?。?/td> | 547K |
| 代理商： | UPD753104GK |
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61
μ
PD753104, 753106, 753108
SUBSYSTEM CLOCK OSCILLATOR CHARACTERISTICS (T
A
= –40 to +85 C, V
DD
= 1.8 to 5.5 V)
Resonator
Recommended constant
Parameter
Test conditions
MIN.
TYP.
MAX.
Unit
Crystal
Oscillation
32
32.768
35
kHz
resonator
frequency (f
XT
)
Note 1
Oscillation
V
DD
= 4.5 to 5.5 V
1.0
2
s
stabilization time
Note 2
10
External
XT1 input frequency
32
100
kHz
clock
(f
XT
)
Note 1
X1 input high/low-level
5
15
μ
s
width (t
XTH
, t
XTL
)
Notes 1.
Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
The oscillation stabilization time is necessary for oscillation to stabilize after applying V
DD
.
2.
Caution
When using the subsystem clock oscillator, wiring in the area enclosed with the dotted line in the
above figure 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
DD
.
Do not ground to the ground pattern in which a high current flows.
Do not fetch a signal from the oscillator.
The subsystem clock oscillator is designed as a low amplification circuit to provide low consumption
current, causing misoperation by noise more frequently than the main system clock oscillator.
Special care should therefore be taken for wiring method when the subsystem clock is used.
XT2
XT1
C4
V
DD
C3
R
XT1
XT2
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