参数资料
型号: M34570EDFP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDSO36
封装: 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-36
文件页数: 13/69页
文件大小: 687K
代理商: M34570EDFP
17
MITSUBISHI MICROCOMPUTERS
4570 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
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
P21/INT
Valid waveform
Falling waveform (“H”
→“L”)
Rising waveform (“L”
→“H”)
Valid waveform
selection bit (I12)
0
1
Fig. 17 External interrupt circuit structure
One-sided edge
detection circuit
EXF0
I12
P21/INT
0
1
Skip
SNZI0
instruction
External 0
interrupt
Falling
Rising
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