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海…我已经通过OSC1/OSC2引脚连接20 MHz石英晶体到PIC16F877 A。我已经阅读过,我们提供电容器振荡器的稳定性。时钟脉冲是如何产生的?维基百科的晶体振荡器定义:“Acrystal oscillatoris,一种电子振荡器电路,它利用压电材料的振动晶体的机械共振产生一个具有精确频率的电信号”,从上面的定义,我想知道振动在哪里。适用于外部晶体振荡器,我连接在OSC1/OSC2引脚?????????????OSC1/OSC2引脚会产生振动吗????如果你知道,请解释清楚。谢谢你。
以上来自于百度翻译 以下为原文 Hai... I have connected 20 MHZ Quartz crystal to PIC16F877A via OSC1/OSC2 pins. I have read we provide Capacitors for the Oscillator stability. How actually the clock pulses generated?? Crystal Oscillator Definition from Wikipedia : "A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a precise frequency". From the above definition , i want to know that where vibrations are applied to the external crystal oscillator which i connected in OSC1/OSC2 pins????????? Is OSC1/OSC2 pins create the vibrations??? If you know , kindly explain me clearly. Thank you.. |
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8个回答
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振荡器(运算放大器)是内部的PIC,只是晶体和负载电容器是外部的。
以上来自于百度翻译 以下为原文 The oscillator (an op-amp) is internal to the pic, just the crystal and load capacitors are external. |
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微芯片有几个关于振荡器的应用注意事项。查找AN826、AN849、AN943等。
以上来自于百度翻译 以下为原文 Microchip has several App Notes regarding oscillators. Look up AN826, AN849, AN943, etc. |
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是的,只是晶体和负载电容器是外部的,正如你所说的JavaKKsObj.我的问题是“哪里振动施加到我连接在OSC1/OSC2引脚的外部晶体振荡器?”????????????OSC1/OSC2引脚会产生振动吗???”
以上来自于百度翻译 以下为原文 Yes , just the crystal and load capacitors are external as you said jack@kksound. My question is that "where vibrations are applied to the external crystal oscillator which i connected in OSC1/OSC2 pins????????? Is OSC1/OSC2 pins create the vibrations???" |
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App Notes SIR有很多行。你能直截了当地回答我的问题吗????很难说出不同类型晶体的答案吗??
以上来自于百度翻译 以下为原文 There are plethora of lines in App Notes sir. Can you give the answer straight to the point of my question ??? Is it hard to say the answer bcz of the different types of crystal out there ?? |
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不,OSC管脚不会产生振动。而且,晶体本身并不会自行振荡。将晶体以正确的方式放置在放大器的反馈路径中,并使电路在晶体的谐振频率下振荡(振动)。正是电路引起了振荡。
以上来自于百度翻译 以下为原文 No, the osc pins do not create vibrations. Also, a crystal alone does not oscillate on its own. Place the crystal in the feedback path of an amplifier in the right way, and it causes the circuit to oscillate (vibrate) at the resonant frequency of the crystal. It is the circuit that causes the oscillations. |
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维基百科文章告诉你所有你需要知道的事情。晶体本身就是振动的来源。施加电信号使压电材料变形,中断信号。PIC内部的放大器提供正反馈以保持振动。晶体的性质决定了振荡频率。
以上来自于百度翻译 以下为原文 The Wikipedia article tells you everything you need to know. The crystal itself is the source of the vibrations. Applying an electrical signal causes the piezoelectric material to deform, interrupting the signal. An amplifier inside the PIC provides positive feedback to keep the vibrations going. The properties of the crystal dictate the frequency of oscillation. |
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现在我进一步回答你的问题。谢谢您。
以上来自于百度翻译 以下为原文 Now i go through further with your answer. Thank you. |
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