參數(shù)資料
型號(hào)： μPD78P078Y
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)： 35/84頁(yè)
文件大?。?/td> 472K
代理商： ΜPD78P078Y
35
m
PD78P078Y
Capacitance
(T
A
= 25°C, V
DD
= V
SS
= 0 V)
Parameter
Symbol
Test Conditions
MIN.
TYP.
MAX.
Unit
Input capacitance
C
IN
f = 1 MHz, Unmeasured pins returned to 0 V.
15
pF
I/O capacitance
C
IO
f = 1 MHz,
P01 to P07, P10 to P17,
15
pF
Unmeasured pins
P20 to P27, P30 to P37,
returned to 0 V.
P40 to P47, P50 to P57,
P64 to P67, P70 to P72,
P80 to P87, P94 to P96,
P100 to P103, P120 to P127,
P130, P131
P60 to P63, P90 to P93
20
pF
Remark
Unless otherwise specified, dual-function pin characteristics are the same as port pin characteristics.
Main System Clock Oscillator Characteristics
(T
A
= –40 to +85°C, V
DD
= 1.8 to 5.5 V)
Resonator
Recommended
Parameter
Test Conditions
MIN.
TYP.
MAX.
Unit
Circuit
Ceramic
Oscillation frequency
V
DD
= Oscillation voltage
1.0
5.0
MHz
resonator
(f
X
)
Note 1
range
Oscillation stabilization
After V
DD
came to MIN. of
4
ms
time
Note 2
oscillation voltage range
Crystal
Oscillation frequency
1.0
5.0
MHz
resonator
(f
X
)
Note 1
Oscillation stabilization
V
DD
= 4.5 to 5.5 V
10
ms
time
Note 2
30
External clock
X1 input frequency
1.0
5.0
MHz
(f
X
)
Note 1
X1 input high- and
85
500
ns
low-level widths (t
XH
, t
XL
)
Notes 1.
Only the oscillator characteristics are shown. For the instruction execution time, refer to
AC Characteristics
.
2.
Time required for oscillation to stabilize after a reset or the STOP mode has been released.
Cautions 1. When using the oscillation circuit of the main system clock, wire the portion enclosed in broken
lines in the figures as follows to avoid adverse influences on the wiring capacitance:
Keep the wiring length as short as possible.
Do not cross the wiring over other signal lines.
Do not route the wiring in the vicinity of lines through which a high fluctuating current flows.
Always keep the ground point of the capacitor of the oscillation circuit at the same potential
as V
SS
.
Do not connect the power source pattern through which a high current flows.
Do not extract signals from the oscillation circuit.
2. When the main system clock is stopped and the device is operating on the subsystem clock,
wait until the oscillation stabilization time has been secured by the program before switching
back to the main system clock.
V
PP
C1
X1
C2
X2
V
PP
C1
X1
C2
X2
X2
X1
PD74HCU04
μ
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