參數(shù)資料
型號: μPD753104
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(shù): 60/90頁
文件大小: 419K
代理商: ΜPD753104
60
μ
PD753104, 753106, 753108
MAIN SYSTEM CLOCK OSCILLATOR CHARACTERISTICS (T
A
= –40 to +85 C, V
DD
= 1.8 to 5.5 V)
Resonator
Recommended constant
Parameter
Test conditions
MIN.
TYP.
MAX.
Unit
Ceramic
Oscillation
1.0
6.0
Note 2
MHz
resonator
frequency (fx)
Note 1
Oscillation
After V
DD
reaches oscil-
4
ms
stabilization time
Note 3
lation voltage range MIN.
Crystal
Oscillation
1.0
6.0
Note 2
MHz
resonator
frequency (fx)
Note 1
Oscillation
V
DD
= 4.5 to 5.5 V
10
ms
stabilization time
Note 3
30
External
X1 input
1.0
6.0
Note 2
MHz
clock
frequency (fx)
Note 1
X1 input
high/low-level width
(t
XH
, t
XL
)
83.3
500
ns
Notes 1.
The oscillation frequency and X1 input frequency indicate characteristics of the oscillator only. For
the instruction execution time, refer to the AC characteristics.
When the oscillation frequency is 4.19 MHz < fx
6.0 MHz at 1.8 V
V
DD
< 2.7 V, setting the processor
clock control register (PCC) to 0011 results in 1 machine cycle time being less than the required 0.95
μ
s. Therefore, set PCC to a value other than 0011.
The oscillation stabilization time is necessary for oscillation to stabilize after applying V
DD
or releasing
the STOP mode.
2.
3.
Caution
When using the main system clock oscillator, wiring in the area enclosed with the dotted line in the
above figure 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
DD
.
Do not ground to the ground pattern in which a high current flows.
Do not fetch a signal from the oscillator.
X2
X1
C1
C2
V
DD
X2
X1
C1
C2
V
DD
X1
X2
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