參數(shù)資料
型號(hào)： μPD78F9116
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(yè)數(shù)： 23/44頁(yè)
文件大?。?/td> 195K
代理商： ΜPD78F9116
Preliminary Product Information
23
μ
PD78F9116
X1
X2
CHARACTERISTICS OF THE MAIN SYSTEM CLOCK OSCILLATION CIRCUIT
(T
A
= -40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
Resonator
Recommended
circuit
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
Ceramic
resonator
Oscillator frequency (f
X
)
Note 1
V
DD
= oscillation voltage
range
1.0
5.0
MHz
Oscillation settling time
Notes 2, 3
Release by RESET
2
15
/f
X
ms
Release by an interrupt
Note 4
ms
Crystal
Oscillator frequency (f
X
)
Note 1
1.0
5.0
MHz
Oscillation settling time
Note 2
V
DD
= 4.5 to 5.5 V
10
ms
30
External
clock
X1 input frequency (f
X
)
Note 1
1.0
5.0
MHz
X1 input high/low level
width (t
XH
, t
XL
)
85
500
ns
Notes 1.
Only the characteristic of the oscillation circuit is indicated. See the description of the AC characteristic
for the instruction execution time.
2.
Time required for oscillation to settle once a reset sequence ends or STOP mode is deselected.
3.
Time after V
DD
reaches MIN. of the oscillation voltage range.
4.
Selectable between 2
time selection register.
12
/f
X
, 2
15
/f
X
, and 2
17
/f
X
with bits 0 to 2 (OSTS0-OSTS2) of the oscillation settling
Caution
When using the main system clock oscillation circuit, observe the following conditions for the
wiring of that section enclosed in dotted lines in the above diagrams, so as to avoid the
influence of the wiring capacitance.
Keep the wiring as short as possible.
Do not allow signal wires to cross one another.
Keep the wiring away from wires that carry a high, non-stable current.
Keep the grounding point of the capacitors at the same level as V
SS
.
Do not connect the grounding point to a grounding wire that carries a high current.
Do not extract a signal from the oscillation circuit.
X1
X2
V
PP
C1
C2
X1
X2
V
PP
C1
C2
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