參數(shù)資料
型號(hào)： UPD784224
廠商： NEC Corp.
英文描述： 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 16/8-BIT單晶片微控制器
文件頁(yè)數(shù)： 64/92頁(yè)
文件大?。?/td> 687K
代理商： UPD784224
64
μ
PD784224, 784225, 784224Y, 784225Y
Data Sheet U12376EJ1V0DS00
Subsystem Clock Oscillator Characteristics (T
A
=
40
°
C to +85
°
C, V
DD
= V
DD0
= V
DD1
)
Resonator Recommended Circuit
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
Crystal
Oscillation frequency (f
XT
)
32
32.768
35
kHz
resonator
Oscillation stabilization
time
Note
4.5 V
≤
V
DD
≤
5.5 V
1.2
2
s
1.8 V
≤
V
DD
< 4.5 V
10
External
XT1 input frequency (f
XT
)
32
35
kHz
clock
XT1 input high-/low-level
width (t
XTH
, t
XTL
)
14.3
15.6
μ
s
Note
Time required to stabilize oscillation after applying supply voltage (V
DD
).
Cautions 1.
When using the subsystem clock oscillator, wire as follows in the area enclosed by the broken
lines in the above figures to avoid an adverse effect from wiring capacitance.
Keep the wiring length as short as possible.
Do not cross the wiring with the other signal lines.
Do not route the wiring near a signal line through which a high fluctuating current flows.
Always make the ground point of the oscillator capacitor the same potential as V
SS
.
Do not ground the capacitor to a ground pattern through which a high current flows.
Do not fetch signals from the oscillator.
2.
When the main system clock is stopped and the device is operating on the subsystem clock,
wait until the oscillation stabilization time has been secured by the program before switching
back to the main system clock.
Remark
For the resonator selection and oscillator constant, customers are required to either evaluate the
oscillation themselves or apply to the resonator manufacturer for evaluation.
V
SS
XT2
XT1
XT2
XT1
PD74HCU04
μ
相關(guān)PDF資料
PDF描述
UPD784224GC 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784224GK 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784224Y 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784225 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784225Y 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
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