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參數(shù)資料
| 型號： | UPD753017A |
| 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)： | 61/88頁 |
| 文件大?。?/td> | 438K |
| 代理商： | UPD753017A |
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61
μ
PD753012A, 753016A, 753017A
Data Sheet U11662EJ2V0DS00
Subsystem Clock Oscillator Characteristics (T
A
= –40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
Resonator
Recommended
Circuit
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
Crystal
resonator
Oscillation frequency
(f
XT
)
Note 1
32
32.768
35
kHz
Oscillation
stabilization time
Note 2
V
DD
= 4.5 to 5.5 V
1.0
2
ms
10
External
clock
XT1 input frequency
(f
XT
)
Note 1
32
100
kHz
XT1 input high-,
low-level width
(t
XTH
, t
XTL
)
5
15
μ
s
Notes 1.
The oscillation frequency shown above indicates characteristics of the oscillator only. For the
instruction execution time, refer to
AC Characteristics
.
The oscillation stabilization time is the time required for oscillation to be stabilized after V
DD
has been
applied.
2.
Caution When using the subsystem clock oscillator, wire the portion enclosed in the dotted line in the
above figure as follows to prevent adverse influence due to wiring capacitance:
· Keep the wiring length as short as possible.
· Do not cross the wiring with other signal lines.
· Do not route the wiring in the vicinity of a line through which a high alternating current flows.
· Always keep the ground point of the capacitor of the oscillator at the same potential as V
DD
.
· Do not ground to a power supply pattern through which a high current flows.
· Do not extract signals from the oscillation circuit.
The subsystem clock oscillator has a low amplification factor to reduce current consumption
and is more susceptible to noise than the main system clock oscillator. Therefore, exercise
utmost care in wiring the subsystem clock oscillator.
Remark
For the resonator selection and oscillator constant, customers are requested to either evaluate the
oscillation themselves or apply to the resonator manufacturer for evaluation.
XT1
XT2
C3
C4
V
DD
R
XT1
XT2
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