參數(shù)資料
型號： μPD78063
廠商： NEC Corp.
元件分類： 8位微控制器
英文描述： 8 Bit Single Chip Microcontrollers
中文描述： 8位單片機微控制器
文件頁數(shù)： 37/68頁
文件大小： 444K
代理商： ΜPD78063
37
m
PD78062, 78063, 78064
Subsystem Clock Oscillator Characteristics (T
A
= –40 to +85°C, V
DD
= 2.0 to 6.0 V)
V
DD
= 4.5 to 6.0 V
Crystal resonator
External clock
Oscillator frequency
(f
XT
)
Note1
Oscillation stabilization time
Note2
XT1 input frequency
(f
XT
)
Note1
XT1 input high-/low-level
width (t
XTH
/t
XTL
)
35
2
10
100
15
32.768
1.2
32
32
5
XT1
XT2
Resonator
Recommended Circuit
Parameter
Test Conditions
MIN.
TYP.
MAX.
Unit
R2
XT2
XT1
IC
C4
C3
kHz
s
kHz
m
s
Notes 1.
Indicates only oscillator characteristics. Refer to
AC Characteristics
for instruction execution time.
Time required to stabilize oscillation after V
DD
has reached the minimum oscillation voltage range.
2.
Cautions 1.
When using the subsystem clock oscillator, wiring in the area enclosed with the dotted line should
be carried out as follows to avoid an adverse effect from wiring capacitance.
Wiring should be as short as possible.
Wiring should not cross other signal lines.
Wiring should not be placed close to a varying high current.
The potential of the oscillator capacitor ground should be the same as V
SS
.
Do not ground it to the ground pattern in which a high current flows.
Do not fetch a signal from the oscillator.
2.
The subsystem clock oscillator is designed as a low amplification circuit to provide low consumption
current, causing misoperation by noise more frequently than the main system clock oscillation
circuit. Special care should therefore be taken to wiring method when the subsystem clock is used.
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