參數(shù)資料
型號(hào): μPD78052Y
廠商: NEC Corp.
英文描述: 8Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單芯片微控制器(8位單片微控制器)
文件頁數(shù): 38/74頁
文件大小: 574K
代理商: ΜPD78052Y
38
μ
PD78052Y, 78053Y, 78054Y, 78055Y, 78056Y, 78058Y
Main System Clock Oscillation Circuit Characteristics (T
A
= –40 to +85
°
C, V
DD
= 2.0 to 6.0 V)
Notes 1.
Indicates only oscillation circuit characteristics. Refer to “AC Characteristics” for instruction execution
time.
2.
Time required to stabilize oscillation after reset or STOP mode release.
Cautions 1. When using the main system clock oscillator, wiring in the area enclosed with the broken line
should be carried out as follows to avoid adverse effects from wiring capacitance.
Wiring should be as short as possible.
Wiring should not cross other signal lines.
Wiring should not be placed close to a varying high current.
The potential of the oscillator capacitor ground should be the same as V
SS
.
Do not ground wiring to a ground pattern in which a high current flows.
Do not fetch a signal from the oscillator.
2. When the main system clock is stopped and the system is operated by the subsystem clock,
the subsystem clock should be switched again to the main system clock after the oscillation
stabilization time is secured by the program.
X1 IC
X2
C2
C1
R1
X1
X2
μPD74HCU04
Recommended
Circuit
TYP.
MAX.
5.0
4
5.0
10
30
5.0
500
Unit
MHz
ms
MHz
ms
MHz
ns
Resonator
Ceramic
resonator
Crystal
resonator
External
clock
Parameter
Oscillator
frequency (fx)
Note 1
Oscillation
stabilization time
Note 2
Oscillator
frequency (fx)
Note 1
Oscillation
stabilization time
Note 2
X1 input
frequency (fx)
Note 1
X1 input
high/low level width
(t
XH
, t
XL
)
MIN.
1.0
1.0
1.0
85
Test Conditions
V
DD
= Oscillator
voltage range
After V
DD
reaches oscil-
lation voltage range MIN.
V
DD
= 4.5 to 6.0 V
X1 IC
X2
C2
C1
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