參數(shù)資料
型號(hào)： UPD753012GK
廠商： NEC Corp.
元件分類： 4位微控制器
英文描述： 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述： 4位單片機(jī)的小型通用紅外遙控器
文件頁(yè)數(shù)： 56/80頁(yè)
文件大?。?/td> 569K
代理商： UPD753012GK
56
μ
PD753012, 753016, 753017
Main System Clock Oscillator Characteristics (T
A
= –40 to +85 C)
Oscillator
Recommended
Constants
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
Ceramic
oscillator
Oscillation frequency
(f
X
)
Note 1
V
DD
= 2.2 to 5.5 V
1.0
6.0
Note 2
MHz
Oscillation
stabilization time
Note 3
After V
DD
has
reached MIN. value of
oscillation voltage
range
4
ms
Crystal
oscillator
Oscillation frequency
(f
X
)
Note 1
V
DD
= 2.2 to 5.5 V
1.0
6.0
Note 2
MHz
Oscillation
stabilization time
Note 3
V
DD
= 4.5 to 5.5 V
10
ms
V
DD
= 2.2 to 5.5 V
30
External
clock
X1 input frequency
(f
X
)
Note 1
V
DD
= 1.8 to 5.5 V
1.0
6.0
Note 4
MHz
X1 input high-,
low-level widths
(t
XH
, t
XL
)
V
DD
= 1.8 to 5.5 V
83.3
500
ns
Notes 1.
The oscillation frequency and X1 input frequency shown above indicate characteristics of the oscillator
only. For the instruction execution time, refer to
AC Characteristics
.
When the oscillation frequency is 4.7 MHz < f
X
≤
6.0 MHz at 2.2 V
≤
V
DD
< 2.7 V, assign a value other
than 0011 to the processor clock control register (PCC). If 0011 is assigned to PCC, one machine cycle
falls short of the rated value of 0.85
μ
s.
The oscillation stabilization time is the time required for oscillation to stabilize after V
DD
has been
applied or STOP mode has been released.
When the X1 input frequency is 4.19 MHz < f
X
≤
6.0 MHz at 1.8 V
≤
V
DD
< 2.7 V, assign a value other
than 0011 to the processor clock control register (PCC). If 0011 is assigned to PCC, one machine cycle
falls short of the rated value of 0.95
μ
s.
2.
3.
4.
Caution When using the main system clock oscillator, wire the portion enclosed by the dotted line in
the above figure as follows to prevent adverse influence from wiring capacitance:
· Keep the wiring length as short as possible.
· Do not cross the wiring with any 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 oscillator at the same potential as V
DD
.
· Do not ground to a power supply pattern through which a high current flows.
· Do not extract any signal from the oscillator.
X1
X2
C1
C2
V
DD
X1
X2
C1
C2
V
DD
X1
X2
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