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參數(shù)資料
| 型號(hào)： | M37481E8SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁數(shù)： | 53/97頁 |
| 文件大?。?/td> | 1076K |
| 代理商： | M37481E8SP |
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53
MITSUBISHI MICROCOMPUTERS
7480/7481 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Table 9. Recommended operating conditions (cont.)
Symbol
Parameter
Standard values
Min.
Typ.
Max.
Unit
1
2
250
500
1
2
2.2V
CC
– 2
8
f(CNTR)
f(S
CLK
)
f(X
IN
)
f(X
IN
) = 4 MHz
f(X
IN
) = 8 MHz
f(X
IN
) = 4 MHz
f(X
IN
) = 8 MHz
f(X
IN
) = 4 MHz
f(X
IN
) = 8 MHz
V
CC
= 2.7 to 4.5 V
V
CC
= 4.5 to 5.5 V
MHz
kHz
MHz
MHz
Timer input frequency CNTR
0
(P4
0
),
CNTR
1
(P4
1
) (Note 3)
Clock input oscillation frequency (Note 3)
Serial I/O clock input
frequency S
CLK
(P1
6
)
(Note 3)
Clock synchronous
serial I/O mode
UART mode
Notes 1 :
–40 to 85 °C for extended operating temperature range version.
2 :
The average output currents I
OH
(avg) and I
OL
(avg) are the average values during 100 ms.
3 :
The clock input oscillation frequency is at 50 % duty ratio.
4 :
When applying a voltage through a resistor as shown in the figure 54, V
I
> V
CC
may be accepted if the current is 1 mA or less.
Fig. 54 Note on use of port P4
Notes on Clamp Diode (7480 Group)
(1) Total input current
The current of port P4 through the clamp diode can be drawn
up to 1.0 mA per port. When a current that cannot be con-
sumed by microcomputer is sent to the clamp diode, this may
raise the power source pin voltage of the microcomputer.
The system power circuit must be designed so that the power
source voltage of the microcomputer may be stabilized within
standard values.
(2) Maximum input voltage
If the input voltage of a signal connected to port P4 is beyond
V
CC
+ 0.3 V, the input waveform should have a delay exceed-
ing 2 μs/V from the moment that this waveform goes over the
voltage.
For using a CR circuit for delay, calculate a proper delay value
by the following expression:
where V
IN
= Maximum input voltage amplitude margin and
t = C
R.
dt
dv
=
≥
2
10
–6
(s/V)
t
0.6
V
IN
Port P4
I
VI
The clamp diode of the 7480/7481 group is designed for a level
shift of DC signal unlike ordinary switching diodes. Do not apply
sudden stress, such as rush current, directly to the diode.
Notes on Countermeasures for Noise and
Latch-up (7480 Group)
(1) Connect a bypass capacitor (0.1μF) across the V
CC
pin and
the V
SS
pin with the shortest possible wiring, using a relatively
thick wire.
(2) Connect a bypass capacitor (0.01 μF) across the V
REF
pin and
the V
SS
pin with the shortest possible wiring, using a relatively
thick wire.
(3) In the oscillation circuit, connect across the X
IN
and X
OUT
pins
with the shortest possible wiring. Connect the GND and V
SS
pins of the oscillation circuit with the shortest possible wiring,
using a relatively thick wire.
(4) In the case of the P3
3
/V
PP
pin of the built-in programmable
ROM version, connect an approximately 5 k
resistor to the
P3
3
/V
PP
pin
the shortest possible in series.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| M37481E8SS | 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 740 CISC 16KB EPROM 5V 42PIN SDIP - Bulk |
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| M37481E8T-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES |
| M37481E8T-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481E8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES |
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