參數資料
型號: μPD753036
廠商: NEC Corp.
英文描述: 4 Bit Single Chip Microcontrollers(4位單片微控制器)
中文描述: 4位單片微控制器(4位單片微控制器)
文件頁數: 56/84頁
文件大小: 596K
代理商: ΜPD753036
56
μ
PD753036
XT1
XT2
C3
C4
V
DD
R
XT1
XT2
Subsystem Clock Oscillation Circuit Characteristics (T
A
= –40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
Oscillator
Recommended Circuit
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
Crystal
resonator
Oscillation frequency
(f
XT
)
Note 1
32
32.768
35
kHz
Oscillation
stabilization time
Note 2
V
DD
= 4.5 to 5.5 V
1.0
2
s
10
External
clock
XT1 input frequency
(f
XT
)
Note 1
32
100
kHz
XT1 input high-,
low-level widths
(t
XTH
, t
XTL
)
5
15
μ
s
Notes 1.
The oscillation frequency shown above indicate characteristics of the oscillation circuit only. For the
instruction execution time, refer to AC Characteristics.
The oscillation stabilization time is the time required for oscillation to be stabilized after V
DD
has been
applied.
2.
Caution When using the subsystem clock oscillation circuit, wire the portion enclosed in the dotted line
in the above figure as follows to prevent adverse influences due to wiring capacitance:
Keep the wiring length as short as possible.
Do not cross the wiring with other signal lines.
Do not route the wiring in the vicinity of a line through which a high alternating current flows.
Always keep the ground point of the capacitor of the oscillation circuit at the same potential
as V
DD
.
Do not ground to a power supply pattern through which a high current flows.
Do not extract signals from the oscillation circuit.
The subsystem clock oscillation circuit has a low amplification factor to reduce current
dissipation and is more susceptible to noise than the main system clock oscillation circuit.
Therefore, exercise utmost care in wiring the subsystem clock oscillation circuit.
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