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參數(shù)資料
| 型號： | M37478E8SP |
| 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 |
| 文件頁數(shù)： | 23/47頁 |
| 文件大?。?/td> | 669K |
| 代理商： | M37478E8SP |
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23
MITSUBISHI MICROCOMPUTERS
7477/7478 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
The key on wake up interrupt is common with the INT
1
interrupt.
When EG
5
is set to “1”, the key on wake up function is selected.
However, key on wake up cannot be used in the normal operating
state. When the microcomputer is in the normal operating state,
both key on wake up and INT
1
are invalid.
KEY ON WAKE UP
“Key on wake up” is one way of returning from a power down state
caused by the STP or WIT instruction. If any terminal of port P0
has “L” level applied, after bit 5 of the edge polarity selection reg-
ister (EG
5
) is set to “1”, an interrupt is generated and the
microcomputer is returned to the normal operating state. A key
matrix can be connected to port P0 and the microcomputer can be
returned to a normal state by pushing any key.
Fig. 15 Block diagram of interrupt input and key on wake up circuit
P3
3
/CNTR
1
P3
2
/CNTR
0
P3
0
/INT
0
P3
1
/INT
1
P0
7
P0
1
EG
3
EG
2
Port P3
3
data read circuit
CNTR interrupt request signal
Port P3
2
data read circuit
EG
0
Port P3
0
data read circuit
INT
0
interrupt request signal
Port P3
1
data read circuit
INT
1
interrupt request signal
CPU halt state signal
Port P0 data read circuit
EG
1
EG
5
P0
0
Pull-up control
register
Direction register
Pull-up control
register
Direction register
Pull-up control
register
Direction register
Noise
eliminating
circuit
1/2
1/2
X
CIN
(P5
0
)
X
IN
CM
7
( Select gate: At reset, shaded side is connected.).
Note: The 7477 group does not have X
CIN
input.
EG
4
Noise
eliminating
circuit
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|---|---|
| M37478E8SP/FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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| M37478E8TXXXFP | 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 |
| M37478E8TXXXSP | 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 |
| M37478E8TXXXSP/FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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