Microchip MCU 12mhz外部振荡器添加一个PIC 18F14K50电路板

没有最好的振荡器，还是水晶？



      以下为原文

    There is no the best kind.
 
oscillator, or crystal?

库兹曼先生“振荡器还是水晶？”无论你认为是正确的，它是PIC 18F14K50电路板上的电路。HTTP://CXCHIF.COM/PDFS/E3MIIIN。从USB引脚4到MCLCKIN和CLKOUT的PDFH腿。



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Mr Kurzman
 
"oscillator, or crystal?"
 
Whatever you think is correct.
 
It is circuit on PIC 18F14K50 breadboard.
 
http://www.ccsinfo.com/pdfs/e3mini-schematic.pdf
 
The leg from USB pin 4 to MCU CLKIN and CLKOUT.
 
Have schematic but no parts list.

KurzmanFYI先生。只需在MCU和USB断路板之间建立电路，而不是整个E3微型板。



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Mr Kurzman
 
FYI. Just building circuit between MCU and USB breakout board.
 
Not the whole E3 Miniboard.

你的帖子真的很搞笑。通常我不明白你想知道什么。你是真的寻求帮助还是仅仅在开玩笑？



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Your posts are really funny. Usually I do not understand what you want to know.
Do you really ask for help or are you kidding only?

含铅的？表面贴装？你从哪里买的？



      以下为原文

    Leaded?
Surface mount?
Where are you buying from?

库尔斯曼请Mouser，DigiKIY或阿罗电子公司。需要一个品牌和部分零件来订购。谢谢！



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    Kurzman
 
Leaded please.
 
Mouser, Digikey or Arrow Electronics.
 
Need a brand and part # to place order.
 
Thanks!

嗨，你应该在MCLR上安装一个10K上拉电阻，否则你会有很多问题。你可以选择使用内部振荡器或者使用外部XTAL。这取决于您的应用程序。如果您需要准确的时间，则使用外部XTAL。如果一个+/- 5%振荡器是好的，那么使用内部振荡器（如果你需要UART，我建议你使用XTAL）。



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    Hi,
you should put a 10K pull-up resistor on MCLR otherwise you'll have lots of issues.
you can select to use internal oscillator or use an external XTAL. It depends upon your application.
If you need accurate time then use an external XTAL. If a +/-5% oscillator is ok, then use internal oscillator (if you need UART I suggest you use XTAL).
Regards
 

“需要准确的时间，然后使用外部XTAL' CCS似乎认为你可以通过没有它。我会保留一个方便的情况下，虽然，这提醒我检查库存在这里。非常肯定所有电容器。可能有水晶。如果不是A+/- 5%振荡器，那么使用内部振荡器，我将在星期一询问CCS，如果没有时序电路，这是可以启动的。我猜MCU在编程时可能是“脱机”的，所以外部电路是必要的。这只是一个“黑暗中的射门”。



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'need accurate time then use an external XTAL'
 
CCS seems to think you can get by without it.
 
I will keep one handy just in case though.
 
That reminds me to check inventory here. Pretty sure have all capacitors. Might have crystal. Probably not.
 
'If a +/-5% oscillator is ok, then use internal oscillator'
 
I am going to ask CCS on Monday whether this can be fired up without the timing circuit.
 
I'm guessing the MCU might be 'offline' while programming so the external circuit is necessary.
 
That's just a 'shot in the dark'.
 
 

“你真的需要帮助吗”是的。当你在部分房子里搜索12MHz振荡器时，你会发现10000个项目。这些“老计时器”在他们的指尖上有答案。当他们选择帮助的时候。库兹曼！你在哪里？”我宁可问，也不想要不想要的部分。



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'Do you really ask for help'
 
Yes. When you search 12mhz oscillator at parts houses you 10,000 items.
 
These 'old timers' have answers at their fingertips.
 
When they choose to help. 'Kurzman! Where are you?'
 
I would rather ask than end up with unwanted parts.

YAHHTPU//www. MICCHIP.COM/FUMMS/M99



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yeah
http://www.microchip.com/forums/m992835.aspx

不，搜索Mouver，只有700个匹配的SMD安装的晶体谐振器。从搜索中除去完整的卷轴，剩下的只有224个匹配，它们都应该工作。最昂贵的一个，即库存，是MaseNo.No:711-VXB2-1B1-12M000搜索具有径向引线的晶体。安装在孔或板上，只有大约300个匹配。消除那些没有备货/按顺序排列的元素，并将这些变型串联起来，剩下的产品不到30个。它们都应该工作，如果与合适的电容器一起使用。与我们已经手上的22个PF电容器一起使用，我将选择一个用于负载电容在15 pF和18 pF之间的晶体修整。迈西尔



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    No,
Searching Mouser, there are only 700 matches for SMD mounted crystal resonators.
Removing full reels from the search, there are only 224 matches left, they should all work.
The most expensive one, that is in stock, is Mouser part no.: 711-VXB2-1B1-12M000
 
Searching for crystals with radial leads for mounting in holes or on breadboard, there are only about 300 matches.
Eliminating those that are not stocked/made to order, and eleminating those variants trimmed for series resonance, there are less than 30 products left. They should all work, if used together with suitable capacitors.
 
For use together with 22 pF capacitors that I already have at hand, I would select a crystal trimmed for use with Load Capacitance between 15 pF and 18 pF.
 
   Mysil

这个网络与Celkin和CkkOutt无关，因为它只是一个GND网络，对于所有连接到它的组件来说都是通用的，包括围绕晶体的两个电容器。你可以选择任何12MHz的晶体（不是振荡器！）适合其PCB足迹。但在你这样做之前，我强烈建议你学习和理解一些常见的电子基础知识——获取和阅读，直到完全理解这本书，比如“傻瓜书电子学”（或者更好的“完全傻瓜电子学”），因为它完全符合你的知识水平。



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    This net has nothing to do with CLKIN and CLKOUT because it's just a GND net which is of couse common for all components connected to it including two capacitors surrounding a crystal.


You may pick any 12 MHz crystal (not oscillator!) which fits its PCB footprint. But before you do this I highly suggest you to learn and understand some basics of common electronic - get and read until completely understood the book such as "Electronics for dummies" (or even better "Electronics for complete idiots" because it perfectly fits your knowledge level).

“SMD安装的晶体谐振器”它是一个面包板项目。示意图是焊接E3迷你板。应该是一样的。“有22个PF电容器”在这个示意图中没有一个。提醒我今天检查我们的库存。一个47和两个8PF电容器。“与CKIN和CKKOUT无关。”我在图4的USB连接器电路图中看到了CLKIN和CLKOUT。“因为它完全符合您的知识水平。”是的，这是关于我对最佳类型的晶体谐振器的了解。使用PIC。如果晶体谐振器是晶体谐振器，那就好了。



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"SMD mounted crystal resonators"
 
It's a breadboard project. Schematic is of soldered E3 Mini board. Should work the same.
 
"with 22 pF capacitors"
 
There are none of those in this schematic. Reminds me to check our inventory today.
 
One .47 and two 8pf capacitors.
 
"nothing to do with CLKIN and CLKOUT"
 
I see in schematic Pin 4 USB connector circuit leads to CLKIN and CLKOUT.
 
"because it perfectly fits your knowledge level"
 
Yes it does regarding my knowledge of best type of crystal resonator to use with PIC's.
 
If 'a crystal resonator is a crystal resonator' then okay.
 
 
 
 
 
 
 
 

我只看到这完美地解释了我对这本书的建议。



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    I only see this perfectly explaining my recommendation about the book for complete idiots

“解释我对这本书的建议是为了彻底的白痴”你和那些书的主人谈话。实际上，“傻瓜”计划是把它放在薄荷未用的条件下，然后再把它卖掉，然后再拿钱。星期一我会打电话给零件屋，让他们来解决。我认为“专家专家”退休后，他们不想再和电子产品打交道了。这包括在论坛上回复帖子。让我忙起来，开始成为那些专家之一。



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"explaining my recommendation about the book for complete idiots"
 
Your talking to the owner of one of those books. Actually 'For Dummies'.
 
Plan is to keep it in mint unused condition and sell it later to get parts with the money later.
 
Speaking of plans. Going to call parts house on Monday and let them figure it out.
 
I think the 'expert experts' when they retire they don't want anything to do with electronics anymore.
 
That includes answering posts on forums.
 
Let me get busy and start on the path to become one of those experts.
 
 

MBedder：一本完全白痴的书是行不通的。他需要的是一本封闭心灵的书！



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    MBedder: a book for complete idiots won't do the job.  What he needs is a book for a closed mind!

以下是对同一类问题的一些尖锐的回答。在我们的论坛上，HTTP//www. McCHIP.COM/FUMMS/M81272ASPXWORD。它说有确定使用哪种电容器的公式。有晶体和晶体振荡器的定义和其他的东西。



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Here's some sharp answers to same kind of questions.
 
http://www.microchip.com/forums/m812726.aspx
 
Right here on our forum.
 
It says there is formula to determine which capacitors to use.
 
Has definition of crystal and crystal oscillator and something else.

这是“水晶”的信息清除。这是一个水晶。如果它有两条腿，它需要盖帽。如果它有三条腿和树脂涂层，它很可能是一个内置有瓶盖的陶瓷谐振器。如果它有四条腿，它可能是一个晶体振荡器模块，需要电源和接地，并自己提供一个逻辑电平信号输出的频率标记在CAN.HTP://E.WiKiTo.Org/Wiki/PieleCySimulaTuuh OH。维基。我知道去那儿看看。没想到会变成大事。



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Here's info clearing up 'Crystal'.
 
That's a crystal. 

• If its got two legs it needs caps.
  
• If its got three legs and is resin coated, its probably a ceramic resonator with caps built in.
  
•   If its got four legs its probably a crystal oscillator module, needs power and ground hooked up and on its own, provides a logic level signal output of the frequency marked on the can.
  

http://en.wikipedia.org/wiki/Pierce_oscillator
 
Uh oh. Wiki[pedia. I know to look there. Didn't think it would turn into big deal.

你真该死…



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    You're g.damn right...