參數(shù)資料
型號： M38K07M4L-XXXHP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP64
封裝： 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64
文件頁數(shù)： 44/133頁
文件大?。?/td> 1359K
代理商： M38K07M4L-XXXHP
38K0 Group
Rev.3.00
Oct 05, 2006
page 18 of 129
REJ03B0192-0300
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 P0 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 15, where an interrupt request is generated by pressing
one of the keys consisted as an active-low key matrix which inputs
to ports P00–P03.
Port P00
latch
Port P00
direction register = “0”
Port P01
latch
Port P01
direction register = “0”
Port P02
latch
Port P02
direction register = “0”
Port P03
latch
Port P03
direction register = “0”
Port P04
latch
Port P04
direction register = “1”
Port P05
latch
Port P05
direction register = “1”
Port P06
latch
Port P06
direction register = “1”
Port P07
latch
Port P07
direction register = “1”
P00 input
P01 input
P02 input
P03 input
P04 output
P05 output
P06 output
P07 output
PULL 0 register
Bit 7 = “0”
Port P0
Input reading circuit
Port PXx
“L” level output
P-channel transistor for pull-up
CMOS output buffer
Key input interrupt request
PULL 0 register
Bit 6 = “0”
PULL 0 register
Bit 5 = “0”
PULL 0 register
Bit 4 = “0”
PULL 0 register
Bit 3 = “1”
PULL 0 register
Bit 2 = “1”
PULL 0 register
Bit 1 = “1”
PULL 0 register
Bit 0 = “1”
Fig. 15 Connection example when using key input interrupt and port P0 block diagram
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