AVR-Chat

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@gmail.com>
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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