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參數(shù)資料
| 型號： | μPD78F0974 |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 Bit Single Chip Microcontrollers |
| 中文描述： | 8位單片機微控制器 |
| 文件頁數(shù)： | 20/40頁 |
| 文件大小： | 232K |
| 代理商： | ΜPD78F0974 |
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20
m
PD78F0974
Capacitance (T
A
= 25 °C, V
DD
= V
SS
= 0 V)
Parameter
Symbol
Test Conditions
MIN.
TYP.
MAX.
Unit
Input
C
IN
Except for SM11 to SM14, SM21 to SM24,
15
pF
capacitance
SM31 to SM34, SM41 to SM44
I/O capacitance
C
IO
f = 1 MHz Unmeasured pins returned to 0 V.
15
pF
Output
C
OUT
15
pF
capacitance
Output
C
SM
SM11 to SM14, SM21 to SM24, SM31 to SM34,
30
PF
capacitance
SM41 to SM44
f = 1 MHz
Unmeasured pins returned to 0 V.
Remark
The characteristics of an alternate-function pin and a port pin are the same unless otherwise specified.
Main System Clock Oscillation Circuit Characteristics (T
A
= –40 to +85 °C, V
DD
=4.5 to 5.5 V)
Ceramic
Oscillation frequency V
DD
=Oscillation voltage
(f
X
)
Note 1
range
4.0
8.38
MHz
resonator
Oscillation
After V
DD
reaches
4
ms
stabilization
time
Note 2
oscillation voltage range
MIN.
Crystal
Oscillation frequency V
DD
=Oscillation voltage
(f
X
)
Note 1
range
4.0
8.38
MHz
resonator
Oscillation
After V
DD
reaches
10
ms
stabilization
time
Note 2
oscillation voltage range
MIN.
External
X1 input frequency
(f
x
)
Note 1
4.0
8.38
MHz
clock
X1 input high-/low-
55
125
ns
level width (t
XH
, t
XL
)
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.
Caution Wiring in the area enclosed with the broken line should be carried out as follows to avoid an
adverse effect 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.
Resonator
Parameter
Test Conditions
MIN.
TYP.
MAX.
Unit
Recommended
Circuit
X1
X2
V
PP
R1
C2
C1
X1
X2
V
PP
C2
C1
X1
X2
μ
PD74HCU04
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