Specifications
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7560 Group
27
The key input interrupt is controlled by the key input control regis-
ter and the port direction register. When enabling the key input
interrupt, set “1” to the key input control bit. A key input can be ac-
cepted from pins set as the input mode in ports P20–P27.
Fig. 23 Structure of key input control register
P
20
k
ey
i
nput contro
l
bi
t
P2
1 key input control bit
P2
2 key input control bit
P2
3 key input control bit
P2
4 key input control bit
P2
5 key input control bit
P2
6 key input control bit
P2
7 key input control bit
0
:
K
e
y
i
n
p
u
t
i
n
t
e
r
r
u
p
t
d
i
s
a
b
l
e
d
1
:
K
e
y
i
n
p
u
t
i
n
t
e
r
r
u
p
t
e
n
a
b
l
e
d
K
ey
i
nput contro
l
reg
i
ster
(KIC : address 0015
16)
b
7
b
0