參數(shù)資料
型號: μPD78P4038
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16位單片微控制器)
中文描述: 8 / 16位單片機(jī)微控制器(8 / 16位單片微控制器)
文件頁數(shù): 32/72頁
文件大小: 325K
代理商: ΜPD78P4038
μ
PD78P4038
32
OSCILLATOR CHARACTERISTICS
(T
A
= –40 to +85
°
C, V
DD
= +2.7 to 5.5 V, V
SS
= 0 V)
Caution When using the system clock generator, run wires in the portion surrounded by broken lines
according to the following rules to avoid effects such as stray capacitance:
Minimize the wiring.
Never cause the wires to cross other signal lines.
Never cause the wires to run near a line carrying a large varying current.
Cause the grounding point of the capacitor of the oscillator circuit to have the same potential
as V
SS1
. Never connect the capacitor to a ground pattern carrying a large current.
Never extract a signal from the oscillator.
Resonator
Ceramic resonator
or crystal
External clock
Recommended Circuit
Parameter
Oscillator frequency (f
XX
)
X1 input frequency (f
X
)
X1 input rise and fall times
(t
XR
, t
XF
)
X1 input high-level and low-
level widths (t
WXH
, t
WXL
)
MIN.
4
4
0
10
MAX.
16
16
10
125
Unit
MHz
MHz
ns
ns
V
SS1
X1
X2
C2
C1
X1
X2
HCMOS
inverter
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