M37754 Mitsubishi, M37754 Datasheet - Page 22

• Manufacturer Part Number: M37754
• Description: SINGLE-CHIP 16BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

The INT
bits 7 and 6 of the INT
rupt uses inputs KI
interrupt control register bit configuration. Figure 15 shows the par-
ticular function select register 1 bit configuration, and Figure 16
shows the INT
When the INT
“0”, a signal from the INT
trol circuit and INT
When the INT
“0”, signals from the KI
P5
nected to the INT
interrupt which uses the KI
When the INT
“1”, signals from the KI
__
KI
the logical sum of these signals is connected to the INT
control circuit. In this case, the external interrupt which uses the KI
Fig. 16 INT
22
0
4
pins, which correspond to ports P5
, are inverted and then the logical sum of these signals is con-
___
P5
P5
P5
P5
6
4
P9
3
/TA3
/TA2
___
7
transistor
5
transistor
transistor
transistor
/TA3
/TA2
interrupt can function as the key input interrupt by setting
Pull-up
Pull-up
5
Pull-up
Pull-up
___
___
___
___
/INT
3
OUT
OUT
/key input interrupt input circuit block diagram
___
3
3
3
IN
IN
3
___
3
/key input interrupt input circuit block diagram.
/KI
/KI
/KI
/KI
/KI
interrupt control register’s bit 7 is “0” and its bit 6 is
interrupt control register’s bit 7 is “1” and its bit 6 is
interrupt control register’s bit 7 is “1” and its bit 6 is
__
3
4
3
2
1
0
___
3
3
interrupt control circuit. In this case, the external
external interrupt is normally performed.
__
(Bit 6 of INT
to KI
___
__
3
3
__
4
interrupt control register. The key input inter-
to KI
__
3
pin, which corresponds to port P9
0
pin is connected to the INT
__
3
or inputs KI
Key input interrupt select bit 0
0
to KI
pins, which correspond to ports P5
__
3
interrupt control register)
0
pins is performed.
__
7
4
to P5
to KI
Pull-up select bit 1
Port P9
Pull-up select bit 0
Port P5
register
Port P5
register
Port P5
register
Port P5
register
__
4
0
, are inverted and then
. Figure 10 shows the
5
7
6
5
4
___
direction register
direction
direction
direction
direction
3
___
M37754M8C-XXXGP, M37754M8C-XXXHP
interrupt con-
3
interrupt
5
, KI
__
3
7
__
to
to
4
to KI
When using the above key input interrupt, select the edge sense
which uses the falling edge from “H” to “L” with the INT
control register so that an interrupt request can occur by inputting “L”
to each of the KI
tor is common to the INT
tor (transistors) can be added to the KI
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.
M37754S4CGP, M37754S4CHP
__
0
pins is performed.
Key input interrupt select bit 1
0
1
Bit 7 of INT
control register
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
__
3
to KI
3
INT
interrupt
Interrupt control circuit
__
___
3
0
MITSUBISHI MICROCOMPUTERS
interrupt control register
pins or the KI
3
interrupt’s one. Additionally, pull-up resis-
__
When the key input interrupt
is selected, select the edge
sense which uses falling edge
from “H” to “L”.
4
__
to KI
4
__
to KI
INT
0
__
pins. The interrupt vec-
3
0
interrupt request
pins by setting the
(Address 6F
___
3
interrupt
16
)