參數(shù)資料
型號: M34551E8-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, MICROCONTROLLER, PQFP48
封裝: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù): 77/154頁
文件大?。?/td> 1778K
代理商: M34551E8-XXXFP
FUNCTIONAL BLOCK OPERATIONS
HARDWARE
1-18
4551 Group User’s Manual
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
D5/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
D5/INT
0
1
Skip
SNZI0
instruction
External 0
interrupt
Falling
Rising
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