參數(shù)資料
型號(hào)： UPD780032AY
廠商： NEC Corp.
元件分類(lèi)： 8位微控制器
英文描述： 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 8位單晶片微控制器
文件頁(yè)數(shù)： 36/70頁(yè)
文件大?。?/td> 527K
代理商： UPD780032AY
36
μ
PD780031AY, 780032AY, 780033AY, 780034AY
Data Sheet U14045EJ1V0DS00
Subsystem Clock Oscillator Characteristics
(T
A
= –40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
Notes 1.
Indicates only oscillator characteristics. Refer to
AC Characteristics
for instruction execution time.
2.
Time required to stabilize oscillation after V
DD
reaches oscillation voltage range MIN.
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
SS1
.
Do not ground the capacitor to a ground pattern through which a high current flows.
Do not fetch signals from the oscillator.
2. The subsystem clock oscillator is designed as a low-amplitude circuit for reducing current
consumption, and is more prone to malfunction due to noise than the main system clock
oscillator. Particular care is therefore required with the wiring method when the subsystem
clock is used.
MIN.
32
32
Resonator
Crystal
resonator
External
clock
Parameter
Oscillation
frequency (f
XT
)
Note 1
Oscillation
stabilization time
Note 2
XT1 input
frequency (f
XT
)
Note 1
XT1 input
high-/low-level width
(t
XTH
, t
XTL
)
Test Conditions
TYP.
32.768
1.2
MAX.
35
2
10
38.5
Unit
kHz
s
kHz
V
DD
= 4.0 to 5.5 V
Recommended Circuit
5
15
C3
XT2
XT1 IC
R
C4
XT1
XT2
μ
PD74HCU04
μ
s
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