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RE: [avr-chat] Newbie fuse selection..attempt 2

From: gecko gecko
Subject: RE: [avr-chat] Newbie fuse selection..attempt 2
Date: Thu, 21 Jul 2005 06:39:33 -0500

Hi everyone,

OK, I've put this off far to long now, but I have to up my frequency. I have ticked the (CKOPT) and (CKSEL=1111 SUT=11) and my Atmega8535 has died just as it did last time. It has a new crystal and caps but something is wrong. Any help most apreciated, what can it be?


Thanks Peeps

----- Original Message -----
From: "Ben Mann"
To: "'gecko gecko'" , address@hidden
Subject: RE: [avr-chat] Newbie fuse selection..attempt 2
Date: Tue, 21 Jun 2005 17:55:55 +0800

> Tick CKOPT, you need this for oscillators > 8MHz or no oscillations will be
> seen.
> Tick one of the "Ext Crystal/Resonator High Freq" options such as the last
> one (CKSEL=1111 SUT=11).
> Ben
> ________________________________________
> I am trying to run an Atmel8535 off of a 16MHz crystal (and recomended caps)
> but have found out it is only running from an internal source - my scope
> shows no oscillations from the Xtal.
> After previously disabling a chip, I have sought advice and have been told
> the fuse settings to use. Although I'm not sure yet how this relates to the
> data sheets advice, despite people trying to tell me, it is the programmed
> and unprogrammed remarks that are throwing me off. Could someone please
> confirm than in AVR Studio4 I should tick the three relevant boxes, despite
> the (prog) remarks here...
> CKSEL3..0 = 1111 (unprogrammed)
> CKOPT = 0 (programmed)
> SUT1.0 = 11 (unprogrammed)
> Thanks People
> --


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