參數(shù)資料
型號: M37510E5156FP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機(jī)
文件頁數(shù): 28/43頁
文件大?。?/td> 614K
代理商: M37510E5156FP
28
7510 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
KEY-ON WAKE UP
The 7510 group contains a key-on wake up interrupt function. The
key-on wake up interrupt function is one way of returning from a
power down state caused by the STP or WIT instruction.
This interrupt is generated by applying “L” level to any pin of port
P2 and the microcomputer is returned to the normal operating
state. If a key matrix is connected to port P2
0
to P2
3
as shown in
Figure 25, the microcomputer can be returned to a normal state by
pressing any one of the keys.
Fig. 25 Block diagram of port P2, and example of wired at used key-on wake up
Port P2
x
(X = 0 to 7)
“L” level output
Port P2
7
latch
Port P2
direction register
bit 7 = “1”
P2
7
output
Key-on wake up input interrupt request
Port P2 input
read circuit
8
P-channel transistor for pull-up
8 8
CMOS output buffer
8 8
8
Port P2
6
latch
Port P2
direction register
bit 6 = “1”
P2
6
output
8 8
8
Port P2
5
latch
Port P2
direction register
bit 5 = “1”
P2
5
output
8 8
8
PULLP2 register
bit 4
Port P2
4
latch
Port P2
direction register
bit 4 = “1”
P2
4
output
8 8
8
PULLP2 register
bit 3
Port P2
3
latch
Port P2
direction register
bit 3 = “0”
P2
3
input
8 8
8
PULLP2 register
bit 2
Port P2
2
latch
Port P2
direction register
bit 2 = “0”
P2
2
input
8 8
8
PULLP2 register
bit 1
Port P2
1
latch
Port P2
direction register
bit 1 = “0”
P2
1
input
8 8
8
PULLP2 register
bit 0
Port P2
0
latch
Port P2
direction register
bit 0 = “0”
P2
0
input
8 8
8
PULLP2 register
bit 6
PULLP2 register
bit 7
PULLP2 register
bit 5
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