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參數(shù)資料
| 型號： | UPD75108AGC |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| 中文描述： | 4位單片機 |
| 文件頁數(shù)： | 45/66頁 |
| 文件大?。?/td> | 460K |
| 代理商： | UPD75108AGC |
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μ
PD75104A, 75108A
45
OSCILLATOR CIRCUIT CHARACTERISTICS
(T
a
= -40 to +85
°
C, V
DD
= 2.7 to 6.0 V)
Oscillator
Recommended
Constants
Item
Conditions
MIN.
TYP.
MAX.
Unit
Ceramic
Oscillation
frequency(f
XX
)*
1
V
DD
= Oscillation
voltage range
2.0
5.0
MHz
Oscillation stabiliza- After V
DD
come to
tion time*
2
MIN. of oscillation
voltage range
4
ms
Crystal
Oscillation
frequency (f
XX
)*
1
Oscillation stabiliza- V
DD
= 4.5 to 6.0 V
tion time*
2
2.0
4.19
5.0
MHz
10
ms
30
ms
External Clock
X1 input frequency
(f
X
)*
1
X1 input high-,
low-level widths
(t
XH
, t
XL
)
2.0
5.0
MHz
100
250
ns
*1: The oscillation frequency and X1 input frequency are indicated only to express the characteristics
of the oscillator circuit. For instruction execution time, refer to AC Characteristics.
2: Time required for oscillation to stabilize after V
DD
has come to MIN. of oscillation voltage range
or the STOP mode has been released.
3: When the oscillation frequency is 4.19 MHz
<
f
xx
≤
5.0 MHz, do not select PCC = 0011 as the
instruction execution time: otherwise, one machine cycle is set to less than 0.95
μ
s, falling short
of the rated minimum value of 0.95
μ
s.
Note:
When using the oscillation circuit of the system clock, wire the portion enclosed in dotted line
in the figures as follows to avoid adverse influences on the wiring capacity:
Keep the wiring length as short as possible.
Do not cross the wiring over the other signal lines. Also, do not route the wiring in the vicinity
of lines through which a high alternating current flows.
Always keep the ground point of the capacitor of the osccillator circuit at the same potential
as V
SS
. Do not connect the ground pattern through which a high current flows.
Do not extract signals from the oscillation circuit.
X1
X2
C1
C2
X1
X2
C1
C2
X1
X2
PD74HCU04
μ
*
3
*
3
*
3
#
#
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