m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 99
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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Table 6.10.1 Occurrence factor of INT
does not use an INT
INTERRUPTS
6.10 External interrupts
6.10 External interrupts
The external interrupts consist of INT
The INT
6-18
INT
6.10.1 INT
An INT
factor of the INT
When using any of pins P5
external interrupt, be sure to clear the port P5 direction register’s bit. (See Figure 6.10.2.)
When using pin P4OUT
P4
When using pin P6OUT
P6
The signal input to pin INT
By reading out the INT
Note: Selection of the interrupt occurrence factor requires the following conditions:
0
0
0
to P4
to P6
to INT
• when an input signal’s falling edge or “L” level is selected, be sure that “L” level width
• when an input signal’s rising edge or “H” level is selected, be sure that “H” level width
i
i
(i = 0 to 7) interrupt request occurs by an input signal to pin INT
interrupt request occurs by detecting the state of pin INT
7
7
i
7
in the input mode. (Refer to section “5.2.3 Pin P4OUT
in the input mode. (Refer to section “5.2.4 Pin P6OUT
(bit 5 at addresses 7D
interrupt
Level sense/Edge sense select bit
6E
i
interrupt request.
16
, 6F
i
interrupt, be sure to set the INT
16
i
CUT
CUT
, FD
read bit (See Figure 6.10.1.), the state of pin INT
0
0
1
1
/INT
/INT
i
1
16
/INT
requires “H” or “L” level width of 250 ns or more, independent of f(X
to FF
0
4
as an input pin of an external interrupt (pin INT
as an input pin of an external interrupt (pin INT
16
1
, P5
to 7F
16
)
i
2
7905 Group User’s Manual Rev.1.0
interrupts.
/INT
16
i
,
interrupt request
7F
(bit 4 at addresses 7D
2
16
, P5
, 6E
Polarity select bit
3
16
/INT
, 6F
16
3
0
1
0
1
, P5
, FD
i
interrupt’s priority level to 0.
16
5
/INT
to FF
16
5
, P5
to
16
)
i
(An interrupt request occurs when the
Falling edge (Edge sense)
Rising edge (Edge sense)
“H” level (Level sense)
“L” level (Level sense)
Occurrence factor of interrupt request
input signal of pin INT
6
all the time. Therefore, when the user
CUT
CUT
/INT
/INT
/INT
i
. Table 6.10.1 lists the occurrence
6
, P5
0
4
.”)
.”)
i
can be read out.
7
/INT
0
4
), be sure to use port pins
), be sure to use port pins
7
as an input pin of the
i
is as follows.)
250 ns.
250 ns.
IN
).
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