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參數(shù)資料
| 型號(hào)： | μPD78F0034Y |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| 中文描述： | 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存 |
| 文件頁數(shù)： | 22/52頁 |
| 文件大小： | 309K |
| 代理商： | ΜPD78F0034Y |
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Preliminary Data Sheet
22
m
PD78F0034Y
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
100
Unit
kHz
s
kHz
V
DD
= 4.5 to 5.5 V
Recommended Circuit
5
15
m
s
Subsystem Clock Oscillator Characteristics (T
A
= –40 to +85°C, V
DD
= 2.7 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 MIN.
Cautions 1. When using the subsystem clock oscillator, wiring in the area enclosed with the broken
line in the above figures should be carried out as follows 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 keep the ground point of the oscillator to 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.
2. The subsystem clock oscillator is a low-amplitude circuit in order to achieve a low
consumption current, 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.
C3
XT2
XT1V
PP
R
C4
XT1
XT2
μ
PD74HCU04
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