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Thread
2007-02-14 by weston54
I have a Tiny2313 in an SOIC package soldered to a PCB I made, along with a 6 pin programming connector for my ISP MKII. Everything was great until I accidentally set the fuse for an external oscillator. Now I get a failure 100% of the time with AVR Studio. Is there some way I can reset this? Ack!! Mark Weston
2007-02-14 by John Samperi
At 01:12 PM 14/02/2007, you wrote: >I accidentally set the fuse for an external oscillator. >Is there some way I can reset this? Ack!! You are not the first to do this :) Feed a 1MHz clock to X1 to give the chip a clock. The clock can be <> than 1MHz but make sure the you have the ISP frequency set to 1/4 of whatever you feed into the chip or you will still get errors. Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics.com.au Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************
2007-02-14 by AVR Development
I had to comment. That is a totally cool question and yeah, it made me wonder. I don't know, I've never done this but yeah, if there is no other route to solution then I would somehow inject a signal at the xtal intput. Hopefully, you can just inject the signal via a probe. You might have to cut a trace, I dunno. A Good Thing To Know John :) Thanks. Barry
-----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of John Samperi Sent: Tuesday, February 13, 2007 7:57 PM To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Tiny2313 At 01:12 PM 14/02/2007, you wrote: >I accidentally set the fuse for an external oscillator. >Is there some way I can reset this? Ack!! You are not the first to do this :) Feed a 1MHz clock to X1 to give the chip a clock. The clock can be <> than 1MHz but make sure the you have the ISP frequency set to 1/4 of whatever you feed into the chip or you will still get errors. Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics. <mailto:john%40ampertronics.com.au> com.au Website http://www.ampertro <http://www.ampertronics.com.au> nics.com.au *Electronic Design * Custom Products * Contract Assembly ******************************************************** [Non-text portions of this message have been removed]
2007-02-14 by dlc
This nice link was passed to me on this topic: http://www.evilmadscientist.com/article.php/avrclockbits enjoy, DLC weston54 wrote: > I have a Tiny2313 in an SOIC package soldered to a PCB I made, along > with a 6 pin programming connector for my ISP MKII. Everything was > great until I accidentally set the fuse for an external oscillator. > Now I get a failure 100% of the time with AVR Studio. Is there some > way I can reset this? Ack!! > > Mark Weston > > > > > > > Yahoo! Groups Links > > > -- ------------------------------------------------- Dennis Clark TTT Enterprises www.techtoystoday.com -------------------------------------------------
2007-02-14 by Ori Y
Hi You can solder 1 - 4MHz crystal to pins 4 and 5 and try to set the fuses back again. then remove the crystal. good luck Ori --- weston54 <weston54@yahoo.com> wrote: > I have a Tiny2313 in an SOIC package soldered to a > PCB I made, along > with a 6 pin programming connector for my ISP MKII. > Everything was > great until I accidentally set the fuse for an > external oscillator. > Now I get a failure 100% of the time with AVR > Studio. Is there some > way I can reset this? Ack!! > > Mark Weston > > > > ____________________________________________________________________________________ The fish are biting. Get more visitors on your site using Yahoo! Search Marketing. http://searchmarketing.yahoo.com/arp/sponsoredsearch_v2.php
2007-02-14 by John Samperi
At 04:55 PM 14/02/2007, you wrote: >You can solder 1 - 4MHz crystal to pins 4 and 5 and >try to set the fuses back again. Cannot do that if the fuses are set for external oscillator, only if external CRYSTAL oscillator has been selected. Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics.com.au Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************
2007-02-14 by Kathy Quinlan
John Samperi wrote: > At 04:55 PM 14/02/2007, you wrote: >> You can solder 1 - 4MHz crystal to pins 4 and 5 and >> try to set the fuses back again. > > Cannot do that if the fuses are set for external oscillator, > only if external CRYSTAL oscillator has been selected. > > Regards > > John Samperi Quick and dirty fix for these problems: Get a square wave of any freq.(up to the max of the chip) (I use 2MHz as that is the fastest my signal gen will do) use a scope probe on X1 inject the signal into the X1 input of the AVR, hold the probe on the pin while you let the programmer reprogram the fuses correctly :) I have rescued batches of M128's when a customer set them ALL WRONG !!! -- Regards, Kat. --------------------------------------------------------------- K.A.Q. Electronics Website: www.kaqelectronics.dyndns.org IM: Yahoo: PinkyDwaggy MSN: katinka@kaqelectronics.dyndns.org For Everything Electronics Phone: 0419 923 731 ---------------------------------------------------------------
2007-02-14 by weston54
This looks great Dennis, thanks for your speedy response. I use a Windows computer, and it looks like AVRDUDE is linux based, at least for the command line. Did I miss something. Is there still hope? Mark Weston
2007-02-14 by dlc@frii.com
AVRdude is Windows, linux and Max OS X. Just find the one that runs on your box and go with it. DLC
> This looks great Dennis, thanks for your speedy response. I use a > Windows computer, and it looks like AVRDUDE is linux based, at least > for the command line. Did I miss something. Is there still hope? > > Mark Weston > > > > > > Yahoo! Groups Links > > > >