參數(shù)資料
型號(hào): UPD78218ACW
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(yè)數(shù): 41/66頁(yè)
文件大?。?/td> 510K
代理商: UPD78218ACW
41
μ
PD78217A, 78218A
OSCILLATOR CHARACTERISTICS (T
A
= –40 to +85
°
C, V
DD
= +5 V
±
10 %, V
SS
= 0 V)
RESONATOR
Ceramic
resonator
or
crystal
resonator
External
clock
RECOMMENDED
CIRCUIT
PARAMETER
Oscillator frequency (f
XX
)
X1 input frequency (f
X
)
X1 input rising/falling time
(t
XR
, t
XF
)
X1 input high/low level width
(t
WXH
, t
WXL
)
UNIT
MHz
MHz
ns
ns
MIN.
4
4
0
30
MAX.
12
12
30
130
X1
X2
V
SS
C1
C2
Caution
When using the 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
a ground pattern in which a high current flows.
Do not fetch a signal from the oscillator.
X1
X2
HCMOS
Inverter
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