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Thread: Help! 16F84A's not oscillating
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face BY : David VanHorn email (remove spam text)



At 10:03 PM 2/2/01 -0500, Andy N1YEW wrote:
>Hello,
>
>I have used the 16f84s before and had no trouble with the oscillator in XT
>mode using a 4mhz crystal with no caps.
>now i am using 16f84a's and they dont oscillate using the same exact
>crystal with no caps in either XT or HS
>Any Hints?


May I refer you to http://www.dvanhorn.org/Micros/All/Index.php ?

You need the caps. Just because something "worked", dosen't mean it's right.
The "crystals" article is a short treatment on using crystals with
microcontrollers.


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