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參數(shù)資料
| 型號(hào)： | UPD753016GC |
| 廠商： | NEC Corp. |
| 元件分類(lèi)： | 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(yè)數(shù)： | 57/80頁(yè) |
| 文件大?。?/td> | 569K |
| 代理商： | UPD753016GC |
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57
μ
PD753012, 753016, 753017
Subsystem Clock Oscillator Characteristics (T
A
= –40 to +85 C)
Oscillator
Recommended
Constants
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
Crystal
oscillator
Oscillation frequency
(f
XT
)
Note 1
V
DD
= 2.2 to 5.5 V
32
32.768
35
kHz
Oscillation
stabilization time
Note 2
V
DD
= 4.5 to 5.5 V
1.0
2
s
V
DD
= 2.2 to 5.5 V
10
External
clock
XT1 input frequency
(f
XT
)
Note 1
V
DD
= 1.8 to 5.5 V
32
100
kHz
XT1 input high-,
low-level widths
(t
XTH
, t
XTL
)
V
= 1.8 to 5.5 V
5
15
μ
s
Notes 1.
The oscillation frequency shown above indicate 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 by the dotted line in the
above figure as follows to prevent adverse influence from to wiring capacitance:
· Keep the wiring length as short as possible.
· Do not cross the wiring with any 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
.
· Do not ground to a power supply pattern through which a high current flows.
· Do not extract any signal from the oscillator.
The subsystem clock oscillator has a low amplification factor to reduce current dissipation and
is more susceptible to noise than the main system clock oscillator. Therefore, exercise utmost
care in wiring the subsystem clock oscillator.
XT1
XT2
C3
C4
V
DD
R
XT1
XT2
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