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參數(shù)資料
| 型號： | UPD75004GB |
| 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)： | 41/66頁 |
| 文件大?。?/td> | 542K |
| 代理商： | UPD75004GB |
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μ
PD75004, 75006, 75008
41
MAIN SYSTEM CLOCK 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
1.0
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
1.0
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
)
1.0
5.0
MHz
100
500
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 been applied or the STOP mode has been
released.
3: When the oscillation frequency is 4.19 MHz
<
fx
≤
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 main 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.
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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