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參數資料
| 型號： | M37534M4-XXXGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP32 |
| 封裝： | 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32 |
| 文件頁數： | 13/58頁 |
| 文件大小： | 753K |
| 代理商： | M37534M4-XXXGP |
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7534 Group
Rev.3.00
Oct 23, 2006
page 18 of 53
REJ03B0099-0300
Key Input Interrupt (Key-On Wake-Up)
A key-on wake-up interrupt request is generated by applying “L” level
to any pin of port P0 that has been set to input mode.
In other words, it is generated when the AND of input level goes from
“1” to “0”. An example of using a key input interrupt is shown in Fig-
ure 18, where an interrupt request is generated by pressing one of
the keys provided as an active-low key matrix which uses ports P00
to P03 as input ports.
Fig. 18 Connection example when using key input interrupt and port P0 block diagram
Port PXx
“L” level output
PULL register
bit 3 = “0”
Port P07
latch
Port P07
Direction register = “1”
**
*
P07 output
Key input interrupt request
Port P0
Input read circuit
* P-channel transistor for pull-up
** CMOS output buffer
PULL register
bit 3 = “0”
Port P06
latch
Port P06
Direction register = “1”
**
*
P06 output
PULL register
bit 3 = “0”
Port P05
latch
Port P05
Direction register = “1”
**
*
P05 output
PULL register
bit 3 = “0”
Port P04
latch
Port P04
Direction register = “1”
**
*
P04 output
PULL register
bit 2 = “1”
Port P03
latch
Port P03
Direction register = “0”
**
*
P03 input
PULL register
bit 2 = “1”
Port P02
latch
Port P02
Direction register = “0”
**
*
P02 input
PULL register
bit 1 = “1”
Port P01
latch
Port P01
Direction register = “0”
**
*
P01 input
PULL register
bit 0 = “1”
Port P00
latch
Port P00
Direction register = “0”
**
*
P00 input
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
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相關代理商/技術參數 |
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