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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)： | 143/154頁 |
| 文件大?。?/td> | 1778K |
| 代理商： | M34551E8-XXXFP |
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APPLICATION
2.2 Interrupts
2-12
4551 Group User’s Manual
2.2.3 Interrupt application examples
(1)
External interrupt
The INT pin is used for external interrupts, of which valid waveforms can be chosen, which can
recognize the change of both edges (“H”
→“L” or “L”→“H”).
Outline: An external interrupt can be used by dealing with the change of edge (“H”
→“L” or “L”→“H”)
in both directions as a trigger.
Specifications: An interrupt occurs by the change of an external signals edge (“H”
→“L” or “L”→“H”).
Figure 2.2.1 shows an operation example of an external interrupt, and Figure 2.2.2 shows a setting
example of an external interrupt.
(2)
Timer 1 interrupt
Constant period interrupts by a setting value to timer 1 can be used.
Outline: The constant period interrupts by the timer 1 underflow signal can be used.
Specifications: Prescaler and timer 1 divide the system clock frequency f(XIN) = 3.6 MHz, and the
timer 1 interrupt occurs every 1 ms.
Figure 2.2.3 shows a setting example of the timer 1 constant period interrupt.
(3)
Timer 2 interrupt
Timer 2 is the fixed dividing frequency, and the constant period interrupts which the count source is
divided by 213 or 214 can be used.
Outline: The constant period interrupts by the timer 2 underflow signal can be used.
Specifications: Timer 2 divides the sub-clock frequency f(XCIN) = 32.768 kHz, and the timer 2
interrupt occurs every 0.5 sec.
Figure 2.2.4 shows a setting example of the timer 2 constant period interrupt.
Fig. 2.2.1 External interrupt operation example
D5/INT
I12
INT valid waveform
Falling
Rising
Falling
Rising
Falling
Rising
“H”
“L”
“1”
“0”
Setting of valid waveform by I12
D5/INT
“H”
“L”
“1”
“0”
Interrupt occurs after setting the valid waveform to “falling.”
The valid waveform of the next interrupt is set to “rising.”
When the interrupt which valid waveform is set to “rising” occurs,
the opposite of the above processing is performed.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34551M4 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:4-BIT SINGLE-CHIP MICROCOMPUTER |
| M34551M4-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER |
| M34551M8 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:4-BIT SINGLE-CHIP MICROCOMPUTER |
| M34552G8FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34552G8HFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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