On Thu, 7 Dec 2000 21:39:13 -0800, you wrote:

>Olin Lathrop (olin_piclist@EMBEDINC.COM) wrote:
>
>>> I have to say you are probably better served buying the complete
>>> oscillator from Digi-key.
>>> I just got 10 of them (20 Mhz.) at $2.50 each. No muss, no fuss, they
>>> just work.
>>> Small package, (4 pins in an 8 pin dip), and low power.
>
>>That can be a convenience for a low volume product, but will cost at
>>least double what the crystal and two caps cost.  One good reason for
>>having an external oscillator is if you are driving multiple devices =
from
>>the same clock.
>
>I ended up picking up some oscillators for this job.
>1) It's only a couple-off project, so no big cost constraint.
>2) Bound to be more reliable, and easier to get working right.
>3) The greater precision is an advantage here.
>4) I realized I could use the OSC_OUT (At CLK/4) as a deglitch
>   clock for a BiPhase-L output that got added at the last minute!
OSCOUT will be the same as the input frequency - it's only fosc/4 in
RC mode.=20
It might be possible to get the PWM or compare output to run at Fosc -
can't remember.=20

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