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参数资料
| 型号： | M37510E6FS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, UVPROM, 4 MHz, MICROCONTROLLER, CQCC160 |
| 文件页数： | 22/44页 |
| 文件大小： | 469K |
| 代理商： | M37510E6FS |
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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 P20 to P23 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 P2x (X = 0 to 7)
“L” level output
Port P27
latch
Port P2
direction register
bit 7 = “1”
P27 output
Key-on wake up input interrupt request
Port P2 input
read circuit
V
P-channel transistor for pull-up
V V CMOS output buffer
V V
V
Port P26
latch
Port P2
direction register
bit 6 = “1”
P26 output
V V
V
Port P25
latch
Port P2
direction register
bit 5 = “1”
P25 output
V V
V
PULLP2 register
bit 4
Port P24
latch
Port P2
direction register
bit 4 = “1”
P24 output
V V
V
PULLP2 register
bit 3
Port P23
latch
Port P2
direction register
bit 3 = “0”
P23 input
V V
V
PULLP2 register
bit 2
Port P22
latch
Port P2
direction register
bit 2 = “0”
P22 input
V V
V
PULLP2 register
bit 1
Port P21
latch
Port P2
direction register
bit 1 = “0”
P21 input
V V
V
PULLP2 register
bit 0
Port P20
latch
Port P2
direction register
bit 0 = “0”
P20 input
V V
V
PULLP2 register
bit 6
PULLP2 register
bit 7
PULLP2 register
bit 5
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