參數(shù)資料
型號(hào)： μPD750004
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)： 54/84頁
文件大小： 464K
代理商： ΜPD750004
54
m
PD750004, 750006, 750008, 750004(A), 750006(A), 750008(A)
Resonator
Ceramic
resonator
Crystal
External
clock
Recommended
constant
CHARACTERISTICS OF THE MAIN SYSTEM CLOCK OSCILLATOR (T
A
= -40 to +85 °C)
Notes 1.
The oscillator frequency and X1 input frequency indicate only the oscillator characteristics. See the item
of AC characteristics for the instruction execution time.
2.
When the supply voltage is 2.2 V
￡
V
DD
< 2.7 V and the oscillator frequency is 4.7 MHz < f
X
￡
6.0 MHz,
set the processor clock control register (PCC) to a value other than 0011. When the PCC is set to 0011,
the time for one machine cycle cannot satisfy the defined setting of 0.85
m
s.
3.
The oscillation settling time means the time required for the oscillation to settle after V
DD
is applied or after
the STOP mode is released.
4.
When the supply voltage is 1.8 V
￡
V
DD
< 2.7 V and the X1 input frequency is 4.19 MHz < fx
￡
6.0 MHz,
set the PCC to a value other than 0011. When the PCC is set to 0011, the time for one machine cycle cannot
satisfy the defined setting of 0.95
m
s.
Caution When the main system clock oscillator is used, conform to the following guidelines when wiring
at the portions surrounded by dotted lines in the figures above to eliminate the influence of the
wiring capacity.
The wiring must be as short as possible.
Other signal lines must not run in these areas.
Any line carrying a high fluctuating current must be kept away as far as possible.
The grounding point of the capacitor of the oscillator must have the same potential as that of V
SS
.
It must not be grounded to ground patterns carrying a large current.
No signal must be taken from the oscillator.
Typ.
Parameter
Oscillator frequency (f
X
)
Note 1
Oscillation settling time
Note 3
Oscillator frequency (f
X
)
Note 1
Oscillation settling time
Note 3
X1 input frequency (f
X
)
Note 1
X1 input high/low level width
(t
XH
, t
XL
)
Min.
1.0
1.0
1.0
83.3
Max.
6.0
Note 2
4
6.0
Note 2
10
30
6.0
Note 4
500
Unit
MHz
ms
MHz
ms
ms
MHz
ns
Conditions
V
DD
= 2.2 to 5.5 V
After V
DD
reaches
Min. of the oscillation
voltage range
V
DD
= 2.2 to 5.5 V
V
DD
= 4.5 to 5.5 V
V
DD
= 2.2 to 5.5 V
V
DD
= 1.8 to 5.5 V
V
DD
= 1.8 to 5.5 V
X1
X2
C1
C2
X1
X2
C1
C2
X1
X2
相關(guān)PDF資料
PDF描述
μPD750004(A) 4 Bit Single Chip Microcontrollers(4位單片微控制器)
μPD750006 4 Bit Single Chip Microcontrollers(4位單片微控制器)
μPD750006(A) 4 Bit Single Chip Microcontrollers(4位單片微控制器)
μPD750008 4 Bit Single Chip Microcontrollers(4位單片微控制器)
μPD750008(A) 4 Bit Single Chip Microcontrollers(4位單片微控制器)
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