[solved] Fuse bits value for atmega32 with 8MHz External Crystal Oscillator

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sasireka
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Posted by sasireka: Mon. Jun 13, 2016 - 07:40 AM
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Hi all,

 

   Good Day! I am using Atmega32A with 8MHz External Crystal Oscillator. I want set fuse bit for this new IC. What is the Fuse Bits value for this Atmega32A with 8MHz External Crystal Oscillator. I have used AVR - OSP II to program fuse bits. http://www.nskelectronics.com/avr_prog.html First Time i read signature got 0x1E 0x95 0x02. Then i wrote High bit - 0x99 and low bit - 0xD0. After this again i read signature - 0xFF 0xFF 0xFF. How to set fuse bit and also how to recovery this IC. 

 

AVR - OSP II - Running result

Checking programmer type ...
Found AVR ISP
Entering programming mode...
Signature = 0x1E 0x95 0x02
Leaving programming mode...
Checking programmer type ...
Found AVR ISP
Entering programming mode...
Signature = 0x1E 0x95 0x02
Leaving programming mode...
Checking programmer type ...
Found AVR ISP
Entering programming mode...
Programming fuse bits...
Selected device has no extended fuse bits!
Leaving programming mode...
Checking programmer type ...
Found AVR ISP
Entering programming mode...
Signature = 0xFF 0xFF 0xFF
Leaving programming mode...

How to solve this problem. Can anyone help to solve this problem.

 

 

 

 

Thanks & Regards

 

Sasireka Thangavel

 

This topic has a solution.

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Thanks & Regards,

Sasi

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AVR Microcontrollers, megaAVR and tinyAVR, Solved
Last Edited: Sat. Jun 18, 2016 - 08:54 AM
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Gold Markclawson
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Posted by clawson: Mon. Jun 13, 2016 - 08:24 AM
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If you use this:

 

http://www.engbedded.com/fusecalc/

 

And put 0x99/0xD0 into the boxes towards the end then [Apply values] then it first confirms that 0x99 is the default for the High byte anyway but more importantly it shows that by using 0xD0 in the low byte what you have selected is:

 

 

This is "Not Good(tm)" as you have selected "External Clock" not "External Crystal". You now need to read an article I wrote a while back...

 

https://www.avrfreaks.net/forum/t...

 

That will talk you thorough the process of applying a clock (that you must generate from somewhere else) to the XTAL1 pin of the "lost" AVR just long enough to re-run ISP and undo the damage you have done.

 

Next time be more careful - setting fuses (as you'll read there) is a potentially dangerous operation and some thought must be applied to the selection you make.

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sasireka
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Posted by sasireka: Mon. Jun 13, 2016 - 10:27 AM
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clawson wrote:

If you use this:

 

http://www.engbedded.com/fusecalc/

 

And put 0x99/0xD0 into the boxes towards the end then [Apply values] then it first confirms that 0x99 is the default for the High byte anyway but more importantly it shows that by using 0xD0 in the low byte what you have selected is:

 

 

This is "Not Good(tm)" as you have selected "External Clock" not "External Crystal". You now need to read an article I wrote a while back...

 

https://www.avrfreaks.net/forum/t...

 

That will talk you thorough the process of applying a clock (that you must generate from somewhere else) to the XTAL1 pin of the "lost" AVR just long enough to re-run ISP and undo the damage you have done.

 

Next time be more careful - setting fuses (as you'll read there) is a potentially dangerous operation and some thought must be applied to the selection you make.

 

Thank you clawson. Tutorial is very nice. Now i am gonna program Low bit - 0xFE and High bit - 0x99. Is this right?

 

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Thanks & Regards,

Sasi

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Gold Markclawson
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Posted by clawson: Mon. Jun 13, 2016 - 10:42 AM
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That would work but usually, when you use a crystal, unless you have a strong reason to choose otherwise it's normal to pick the option that has the longest start up time possible (to give the crystal a chance to fully resonate) so pick the one with start up time "16K CK + 64ms". Also I guess 8MHz is "Medium Freq" rather than "High Freq" so in all I guess I would be looking at Low=0xFD perhaps?

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sasireka
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Posted by sasireka: Mon. Jun 13, 2016 - 11:08 AM
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clawson wrote:

That would work but usually, when you use a crystal, unless you have a strong reason to choose otherwise it's normal to pick the option that has the longest start up time possible (to give the crystal a chance to fully resonate) so pick the one with start up time "16K CK + 64ms". Also I guess 8MHz is "Medium Freq" rather than "High Freq" so in all I guess I would be looking at Low=0xFD perhaps?

 

oK Clawson. Thank you. i will do this one.

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Thanks & Regards,

Sasi

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sasireka
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Posted by sasireka: Mon. Jun 13, 2016 - 11:18 AM (Reply to #5)
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How to recover Chip signature mismatch IC. Is it possible.

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Thanks & Regards,

Sasi

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Gold Markclawson
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Posted by clawson: Mon. Jun 13, 2016 - 11:37 AM
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sasireka wrote:
How to recover Chip signature mismatch IC. Is it possible.

Which bit of my tutorial did you not understand?

 

As I said there what you have done is programming a non-existent clock so the AVR is no longer running. In order to restore things you have to make it run. To do that you need to provide a clock. I made 6 suggestions of how you may generate a suitable clock.

 

For example do you have a frequency generator? If yes then you might use that to provide a clock.

 

Alternatively do you have another AVR (perhaps an Arduino?) that you can program? As I said you could put a program in it to toggle a pin and then connect that signal to the XTAL1 of the chip you are trying to recover.

 

I do suggest you re-read the tutorial. The whole point of the article was to explain exactly what your options are when you have made a mistake setting CKSEL.

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Bronze Markbobgardner
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Posted by bobgardner: Tue. Jun 14, 2016 - 12:52 AM
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Mr. Cliff, you are surely the most patient soul I have ever known.

 

Imagecraft compiler user

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sasireka
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Posted by sasireka: Tue. Jun 14, 2016 - 04:50 AM (Reply to #7)
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Dear Clawson,

 

    Good Day! Thanks a lot. I will read your tutorial again and i will fix this.

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Thanks & Regards,

Sasi

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Last Edited: Tue. Jun 14, 2016 - 04:52 AM
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sasireka
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Posted by sasireka: Thu. Jun 16, 2016 - 06:30 AM (Reply to #5)
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Hi clawson,

 

   Good Day! I have used Low - 0xFD and High - 0x99. But i am getting "Selected device has no extended fuse bits!". What is the value have to enter in extended.

 

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Thanks & Regards,

Sasi

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Bronze Markdavid.prentice
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Posted by david.prentice: Thu. Jun 16, 2016 - 07:03 AM
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You are dependent on whatever Indian software is used with your Indian programmer.
Since the mega32 has not got an extended fuse, I would expect it to ignore the box. But who knows how your programming software behaves?
Ask the vendor. Or simply try an empty box or a box with 0xFF.
Life is a lot simpler with reliable software like avrdude and a command line.
Or buy an official Atmel programmer and use the official Atmel software like AS7.
.
David.

Last Edited: Thu. Jun 16, 2016 - 07:05 AM
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sasireka
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Posted by sasireka: Thu. Jun 16, 2016 - 07:09 AM (Reply to #11)
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Thanks David.  If i keep it as empty box then only i am getting like Selected device has no extended fuse bits. So now i will use 0xFF now.

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Thanks & Regards,

Sasi

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Bronze Markdavid.prentice
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Posted by david.prentice: Thu. Jun 16, 2016 - 07:23 AM
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From your link,  it looks as if the programmer hardware is fairly old.

 

  • Connects AVR OSP II , Code Vision AVR in Protocal AVR 911&910

 

Since it is "old" it will definitely be capable of programming "old" chips like a mega32.

I would try avrdude or Codevision

 

David.

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sasireka
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Posted by sasireka: Thu. Jun 16, 2016 - 07:34 AM (Reply to #13)
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ok david. i will try with atmel studio 6.2

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Thanks & Regards,

Sasi

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Bronze Markdavid.prentice
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Posted by david.prentice: Thu. Jun 16, 2016 - 07:40 AM
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No,  you would need to try avrdude.

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sasireka
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Posted by sasireka: Thu. Jun 16, 2016 - 08:19 AM (Reply to #15)
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i tried like extended bits - 0xFF, Low bits - 0xFD, High bits - 0x99. After that i read ic chip signature i got 0xFF 0xFF 0xFF

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Thanks & Regards,

Sasi

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joeymorin
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Posted by joeymorin: Thu. Jun 16, 2016 - 05:07 PM
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You have selected fuses suitable for a crystal oscillator between 0.9 MHz and 3.0 MHz.  Have you fitted such a crystal (with caps) to XTAL1/2?  Without the appropriate crystal and caps, the AVR will have no clock source.  Without a clock source, further ISP programming will not be possible.  Refer to Cliff's tutorial.

"Experience is what enables you to recognise a mistake the second time you make it."

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sasireka
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This reply has been marked as the solution. 
Posted by sasireka: Sat. Jun 18, 2016 - 08:53 AM (Reply to #16)
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Dear All,

 

   Good Day! Finally it is working. I used like Extended bits - 0xFF, High bits - 0xD9, Low bits - 0xFF. Thanks a lot to all. Special thanks to Clawson and David

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Thanks & Regards,

Sasi

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learningbird
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Posted by learningbird: Wed. Jul 27, 2016 - 12:52 PM
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Me too got the same programmer  (AVR - OSP II from  Nsk Electronics), while reading signature it shows 

Signature = 0xFF 0xFF 0xFF

i gave 1 Mhz pulse but it dint work out  and while reading fuse bits it shows random values .how did u solve the problem ???

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xmen14
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Posted by xmen14: Tue. Jul 14, 2020 - 05:01 PM
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sasireka wrote:

Dear All,

 

These settings didn't work for me

   Good Day! Finally it is working. I used like Extended bits - 0xFF, High bits - 0xD9, Low bits - 0xFF. Thanks a lot to all. Special thanks to Clawson and David

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