avr-chat
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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


From: Ben Mann
Subject: RE: [avr-chat] Newbie fuse selection..attempt 2
Date: Fri, 22 Jul 2005 08:49:06 +0800

Was just a thought J. In the datasheet under ordering information it shows two speed grades of the chip. Sounds like you have the right one though.

 

Ben

 


From: address@hidden [mailto:address@hidden On Behalf Of gecko gecko
Sent: Thursday, 21 July 2005 10:57 PM
To: address@hidden
Subject: RE: [avr-chat] Newbie fuse selection..attempt 2

 

Its an AtmegaGA8535 16PU 0512A. How does this fair with your speed theory - and how do you know?

 

Thanks

----- Original Message -----
From: "Ben Mann"
To: "'gecko gecko'" , address@hidden
Subject: RE: [avr-chat] Newbie fuse selection..attempt 2
Date: Thu, 21 Jul 2005 20:57:50 +0800

Just a thought, does your part have ATMEGA8535-16PC (or -16AI) marked on it? If you are using an -8xx mcu then I could imagine it becoming unhappy with the high speed crystal.

Ben

 


From: address@hidden [mailto:address@hidden On Behalf Of gecko gecko
Sent: Thursday, 21 July 2005 7:40 PM
To: address@hidden
Subject: RE: [avr-chat] Newbie fuse selection..attempt 2

 

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
>
> --


--

___________________________________________________________
Sign-up for Ads Free at Mail.com
http://www.mail.com/?sr=signup


>
>
> _______________________________________________
> AVR-chat mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/avr-chat


--

___________________________________________________________
Sign-up for Ads Free at Mail.com
http://www.mail.com/?sr=signup


reply via email to

[Prev in Thread] Current Thread [Next in Thread]