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參數(shù)資料
| 型號(hào)： | UPD78322GJ |
| 廠商： | NEC Corp. |
| 英文描述： | 16/8-BIT SINGLE-CHIP MICROCONTROLLER |
| 中文描述： | 16/8-BIT單片機(jī) |
| 文件頁(yè)數(shù)： | 65/88頁(yè) |
| 文件大小： | 479K |
| 代理商： | UPD78322GJ |
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65
μ
PD78320, 78322
OSCILLATOR CHARACTERISTICS (T
A
= –10 to +70
°
C, V
DD
= +5 V
±
10 %, V
SS
= 0 V)
Resonator
Ceramic resonator
or
crystal resonator
External clock
Parameter
Oscillation frequency (f
XX
)
X1 input frequency (f
X
)
X1 input rise/fall time (t
XR
, t
XF
)
X1 input high/low level width
(t
WXH
, t
WXL
)
MIN.
8
8
0
25
Unit
MHz
MHz
ns
ns
MAX.
16
16
20
80
Recommended Circuit
X1
X2
HCMOS
Invertor
X1
X2
HCMOS
Invertor
Open
or
Caution
When using the system clock oscillation circuit, wire the part encircled in the dotted line in the following
manner to avoid the influence of the wiring capacity, etc.
Make the wiring as short as possible.
Avoid intersecting other signal conductors. Avoid approaching lines in which very high fluctuating
currents run.
Make sure that the grounding point of the oscillation circuit capacitor always has the same electrical
potential as V
SS
. Avoid grounding with a grand pattern in which very high currents run.
Do not fetch signals from the oscillation circuit.
X1
X2
C1
C2
V
SS
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