參數(shù)資料
型號(hào)： μPD780024Y
廠商： NEC Corp.
英文描述： 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述： 8位單片機(jī)微控制器（8位單片微控制器）
文件頁(yè)數(shù)： 36/66頁(yè)
文件大?。?/td> 453K
代理商： ΜPD780024Y
μ
PD780021Y, 780022Y, 780023Y, 780024Y
Preliminary Data Sheet
36
Subsystem Clock Oscillation Circuit Characteristics (T
A
= –40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
Notes 1.
Indicates only oscillation circuit characteristics. Refer to
AC Characteristics
for instruction execution time.
2.
Time required to stabilize oscillation after V
DD
reaches oscillation voltage MIN.
Cautions 1. When using the subsystem clock oscillator, wiring in the area enclosed with the broken line
in the above figures should be carried out as follows to avoid an adverse effect from wiring
capacitance.
Keep the wiring length as short as possible.
Do not cross the wiring with the other signal lines.
Do not route the wiring near a line through which a high fluctuating current flows.
Always keep the ground point of the oscillator to the same potential as V
SS1
.
Do not ground the capacitor to a ground pattern in which a high current flows.
Do not fetch signals from the oscillator.
2. The subsystem clock oscillator is a low-amplitude circuit in order to achieve a low consump-
tion current, and is more prone to malfunction due to noise than the main system clock
oscillator. Particular care is therefore required with the wiring method when the subsystem
clock is used.
XT1
XT2
μ
PD74HCU04
C3
XT2
XT1 IC
R2
C4
Resonator
Recommended Circuit
Parameter
Test Conditions
MIN.
TYP.
MAX.
Unit
Crystal
resonator
Oscillation
frequency (f
XT
)
Note 1
32
32.768
35
kHz
Oscillation
stabilization time
Note 2
V
DD
= 4.5 to 5.5 V
1.2
2
s
10
External
clock
XT1 input
frequency (f
XT
)
Note 1
32
100
kHz
XT1 input
high-/low-level width
(t
XTH
, t
XTL
)
5
15
μ
s
相關(guān)PDF資料
PDF描述
μPD780024 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μPD780021 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μPD780022 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μPD780023 8 Bit Single Chip Microcontrollers(8位單片微控制器)
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