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參數(shù)資料
| 型號： | M37754M8C-XXXHP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片16位微機(jī)的CMOS |
| 文件頁數(shù)： | 22/114頁 |
| 文件大?。?/td> | 1116K |
| 代理商： | M37754M8C-XXXHP |
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MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
22
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
The INT
3
interrupt can function as the key input interrupt by setting
bits 7 and 6 of the INT
3
rupt uses inputs KI
3
to KI
0
or inputs KI
4
to KI
0
. Figure 10 shows the
interrupt control register bit configuration. Figure 15 shows the par-
ticular function select register 1 bit configuration, and Figure 16
shows the INT
3
/key input interrupt input circuit block diagram.
When the INT
3
interrupt control register’s bit 7 is “0” and its bit 6 is
“0”, a signal from the INT
3
pin is connected to the INT
3
interrupt con-
trol circuit and INT
3
external interrupt is normally performed.
When the INT
3
interrupt control register’s bit 7 is “1” and its bit 6 is
“0”, signals from the KI
3
to KI
0
pins, which correspond to ports P5
7
to
P5
4
, are inverted and then the logical sum of these signals is con-
nected to the INT
3
interrupt control circuit. In this case, the external
interrupt which uses the KI
3
to KI
0
pins is performed.
When the INT
3
interrupt control register’s bit 7 is “1” and its bit 6 is
4
pin, which corresponds to port P9
5
, KI
3
to
KI
0
pins, which correspond to ports P5
7
to P5
4
, are inverted and then
the logical sum of these signals is connected to the INT
3
interrupt
control circuit. In this case, the external interrupt which uses the KI
4
to KI
0
pins is performed.
When using the above key input interrupt, select the edge sense
which uses the falling edge from “H” to “L” with the INT
3
interrupt
control register so that an interrupt request can occur by inputting “L”
to each of the KI
3
to KI
4
to KI
0
pins. The interrupt vec-
tor is common to the INT
3
interrupt’s one. Additionally, pull-up resis-
tor (transistors) can be added to the KI
4
to KI
0
pins by setting the
contents of the particular function select register 1’s bits 7 and 6 and
setting “0” to each bit of the corresponding port’s direction register.
Fig. 16 INT
3
/key input interrupt input circuit block diagram
Pull-up select bit 1
Port P9
5
direction register
Pull-up select bit 0
Port P5
7
direction
register
Key input interrupt select bit 0
(Bit 6 of INT
3
interrupt control register)
P5
7
/TA3
IN
/KI
3
Pull-up
transistor
Port P5
6
direction
register
Port P5
5
direction
register
Port P5
4
direction
register
P9
5
/INT
3
/KI
4
P5
6
/TA3
OUT
/KI
2
P5
5
/TA2
IN
/KI
1
P5
4
/TA2
OUT
/KI
0
INT
3
interrupt control register
(Address 6F
16
)
When the key input interrupt
is selected, select the edge
sense which uses falling edge
from “H” to “L”.
Interrupt control circuit
INT
3
interrupt request
Key input interrupt select bit 1
Bit 7 of INT
3
interrupt
control register
0
1
Pull-up
transistor
Pull-up
transistor
Pull-up
transistor
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