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參數(shù)資料
| 型號(hào)： | UPD784908 |
| 廠商： | NEC Corp. |
| 英文描述： | 16-BIT SINGLE-CHIP MICROCONTROLLER |
| 中文描述： | 16位單片機(jī) |
| 文件頁(yè)數(shù)： | 72/98頁(yè) |
| 文件大?。?/td> | 657K |
| 代理商： | UPD784908 |
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μ
PD784907, 784908
72
Data Sheet U11680EJ2V0DS00
Main Oscillator Characteristics (T
A
= –40 to +85
°
C, V
DD
= 3.5 to 5.5 V, V
SS
= 0 V)
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
Oscillator frequency
f
XX
Ceramic resonator or crystal resonator
2
12.58
MHz
Caution
When using the clock generator, wire to avoid adverse influence from wiring capacitance.
Keep the wiring length as short as possible.
Do not cross the wiring with other signal lines.
Do not route the wiring near a signal line through which a high fluctuating current flows.
Make the ground point of the oscillator capacitor the same potential as V
SS1
. Do not ground
the capacitor to a ground pattern in which a high current flows.
Do not fetch signals from the oscillator.
Remark
Connect a 12.582912 MHz or 6.291456 MHz oscillator to operate the internal clock timer with the main
clock.
Clock Oscillator Characteristics (T
A
= –40 to +85
°
C, V
DD
= 3.5 to 5.5 V, V
SS
= 0 V)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Oscillator frequency
f
XT
Ceramic resonator or crystal resonator
32
32.768
35
kHz
Oscillation stabilization
time
t
SXT
V
DD
= 4.5 to 5.5 V
1.2
2
s
10
s
Oscillation hold voltage
V
DDXT
3.5
5.5
V
Watch timer operating
voltage
V
DDW
3.5
5.5
V
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