參數資料
型號: M34551M8
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER
中文描述: 單芯片4位CMOS微機紅外遙控器
文件頁數: 16/68頁
文件大小: 698K
代理商: M34551M8
16
MITSUBISHI MICROCOMPUTERS
4551 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for
INFRARED REMOTE CONTROL TRANSMITTER
EXTERNAL INTERRUPTS
An external interrupt request occurs when a valid waveform (=
waveform causing the external 0 interrupt) is input to an interrupt
input pin (edge detection).
The external 0 interrupt can be controlled with the interrupt control
register I1.
Table 7 External interrupt activated condition
Name
External 0 interrupt
Input pin
D
5
/INT
Valid waveform
Falling waveform (“H”
“L”)
Rising waveform (“L”
“H”)
Valid waveform
selection bit (I1
2
)
0
1
Fig. 17 External interrupt circuit structure
One-sided edge
detection circuit
EXF0
I1
2
Falling
D
5
/INT
0
1
Skip
SNZI0
instruction
External 0
interrupt
Rising
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