AVR-Chat

I'm using the 3.686 mhz version part number ach-3.6864mhz-ek

My next order will be for normal crystals, in the mean time, I would 
really like to figure out how to use the ones I've already bought.  I 
hate to pay $10 in s&h for a $0.45 part.

Thanks,
Jason

--- In AVR-Chat@yahoogroups.com, Reza <reza_agha@...> wrote:
>
> 
> The device (ACH) your using is a simple crystal
> oscilator, it's better to use a simple crystal.
> 
> but if you wana use this part:
> 
> - it seems to use 50pf capacitors in circuit.
> - it seems to be work on any frequency (due to part
> number), your ATmega32 does not work faster than 8MHz
> in L version, and not more than 16MHz on other parts.
> sometimes you may overclock it to 20MHz not 50MHz. so
> avoid using ACH-16-... or something.
> - ...
> 
> if i where u, i used normal crystals with two 33pf
> capacitors instead. simple, cheap and easy.
> 
> note:
> 
> external clock is usefull when you have it by default
> somewhere in your circuit and want to use it, or maybe
> want to share it amoung many microcontrollers in one
> circuite or something.
> 
> good luck;
> 
> --- jasonparkerhendrix <hendrix.jason@...>
> wrote:
> 
> > When set to use an internal clock (atmega32), my app
> > works ok. 
> > 
> > When set to use an external clock (fuses CKSEL =
> > 0000 and SUT = 10) the 
> > chip does nothing. I assume I have something wired
> > incorrectly. 
> > 
> > I'm using this external clock: 
> > http://www.abracon.com/Oscillators/ach.pdf 
> > 
> > I have it wired like this: 
> > pin 1 floating. 
> > pin 4 to ground. 
> > pin 5 to xtal1 on the atmega32. 
> > pin 8 to voltage. 
> > 
> > Does anyone have any sugesstions as to what I may
> > have wrong? 
> > 
> > Thanks!
> > 
> > 
> 
> 
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