參數(shù)資料
型號: 7513
英文描述: 7513 Group Datasheet Datasheet 1067K/FEB.06.01
中文描述: 7513組數(shù)據(jù)表數(shù)據(jù)表1067K/FEB.06.01
文件頁數(shù): 24/66頁
文件大?。?/td> 1067K
代理商: 7513
23
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7513 Group
Key Input Interrupt (Key-on wake-up)
A Key-on wake up interrupt request is generated by applying a
falling edge to any pin of port P2 that have been set to input mode.
In other words, it is generated when AND of input level goes from
1
to
0
. An example of using a key input interrupt is shown in
Figure 18, where an interrupt request is generated by pressing
one of the keys consisted as an active-low key matrix which inputs
to ports P2
0
P2
3
.
Fig. 18 Connection example when using key input interrupt and port P2 block diagram
Port P2
0
latch
Port P2
0
direction register =
0
Port P2
1
latch
Port P2
1
direction register =
0
Port P2
2
latch
Port P2
2
direction register =
0
Port P2
3
latch
Port P2
3
direction register =
0
Port P2
4
latch
Port P2
4
direction register =
1
Port P2
5
latch
Port P2
direction register =
1
Port P2
6
latch
Port P2
7
latch
Port P2
7
direction register =
1
Port P2
0
input
Port P2
1
input
Port P2
2
input
Port P2
3
input
Port P2
4
output
Port P2
5
output
Port P2
6
output
Port P2
7
output
PULLA register
Bit 2 =
1
Port P2 input
reading circuit
Key input interrupt request
Port PXx
L
level output
CMOS output buffer
P-channel transistor for pull-up
Key input control register =
1
Key input control register =
1
Key input control register =
1
Key input control register =
1
Key input control register =
1
Key input control register =
1
Key input control register =
1
Port P2
6
direction register =
1
Key input control register =
1
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