參數(shù)資料
型號: UPD75P108BCW
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): 20/46頁
文件大?。?/td> 381K
代理商: UPD75P108BCW
20
μ
PD75P108B
SYSTEM CLOCK OSCILLATION CIRCUIT CHARACTERISTICS (Ta = –40 to +85
°
C, V
DD
= 2.7 to 6.0 V)
TYP.
4.19
MAX.
5.0
4
5.0
10
30
5.0
250
UNIT
MHz
ms
MHz
ms
ms
MHz
ns
RECOMMENDED
CIRCUIT
PARAMETER
Oscillator
frequency (f
XX
)
*1
Oscillation
stabilization time
*2
Oscillator
frequency (f
XX
)
*1
Oscillation
stabilization time
*2
X1 input
frequency (f
X
)
*1
X1 input
high/low level width
(t
XH
, t
XL
)
TEST CONDITIONS
V
DD
= Oscillation voltage
V
DD
=
range
After V
DD
reaches oscil-
lator voltage range MIN.
V
DD
= 4.5 to 6.0 V
MIN.
2.0
2.0
2.0
100
μ
PD74HCU04
RESONATOR
Ceramic
resonator
Crystal
resonator
External
clock
X1
X2
*3
*3
*
1.
Indicates only oscillation circuit characteristics.
Refer to “AC Characteristics” for instruction execution time.
Time required to stabilize oscillation after V
DD
impression or STOP mode release.
When using a value of f
x
such that 4.19MHz<f
xx
5.0MHz, if the maximum speed mode:
Φ
=f
x
/4 is set as the
CPU clock frequency, 1 machine cycle becomes less than 0.95
μ
s, with the result that the specified MIN
value of 0.95 cannot be observed.
2.
3.
Note
When the system clock oscillator is used, the following points should be noted concerning wiring in the
section enclosed by dots, in order to prevent the effects of wiring capacitance, etc.
Keep the wiring as short as possible.
Do not cross any other signal lines, and keep clear of lines in which a high fluctuating current
flows.
Ensure that oscillator capacitor connection points are always at the same potential as V
SS
. Do not
ground in a ground pattern in which a high current flows.
Do not take a signal from the oscillator.
X2
C2
X1 V
SS
C1
X2
C2
X1 V
SS
C1
#
#
#
#
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