參數(shù)資料
型號(hào)： μPD780306Y
廠商： NEC Corp.
英文描述： 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述： 8位單片機(jī)微控制器（8位單片微控制器）
文件頁數(shù)： 38/72頁
文件大小： 531K
代理商： ΜPD780306Y
38
μ
PD780306Y, 780308Y
X1
X2
IC
C1
C2
R1
X1
X2
IC
C1
C2
R1
MAIN SYSTEM CLOCK OSCILLATION CIRCUIT CHARACTERISTICS (T
A
= –40 to +85
°
C, V
DD
= 2.0
Note 4
to 5.5 V)
Unit
MHz
ms
MHz
ms
MHz
ns
MAX.
5
4
5
10
30
5.0
500
Recommended
circuit
Parameter
Oscillator
frequency (f
X
)
Note 1
Oscillation
stabilization time
Note 2
Oscillator
frequency (f
X
)
Note 1
Oscillation
stabilization time
Note 2
X1 input
frequency (f
X
)
Note 1
X1 input
high/low level width
(t
XH
, t
XL
)
MIN.
1
1
1.0
85
Resonator
Ceramic
resonator
Crystal
resonator
External clock
Notes 1.
Indicates only oscillation circuit characteristics. Refer to
AC Characteristics
for instruction execution time.
2.
Time required to stabilize oscillation after reset or STOP mode release.
3.
After V
DD
reaches the minimum oscillator voltage range.
4.
Actually, oscillation start voltage or over, and V
DD
= 2.0 or over (For an external clock, V
DD
= 2.0 or over is
OK).
Cautions
1.
When using the main system clock oscillator, wiring in the area enclosed with the broken 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.
If the main system clock oscillation circuit is operated by the subsystem clock when the main
system clock is stopped, reswitching to the main system clock should be performed after the stable
oscillation time has been obtained by the program.
TYP.
μ
PD74HCU04
Test conditions
V
DD
= Oscillator
voltage range
After V
DD
reaches oscil-
lator voltage range MIN.
V
DD
= Oscillator
voltage range
V
DD
= 4.5 to 5.5 V
Note 3
Note 3
X1
X2
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