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rimpul
Associate
India - Member - New Member

Join Date: Aug 2011
Posts: 37

Testing a ATMEGA64A Controller

01/23/2012 9:11 AM

Hi all,

I am using ATMEGA64A controller, I have 5 pcb boards with this controller, out of five 4 are successfully programmed but I am not able to program the last board. I am using avrstudio 4 to burn the code, please reply me how to test whether the controller is working fine or gone bad. I have checked the conectivity from the programing pin to the controller pins, all are proper, please reply how to proceed.

regards

rimpul
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SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#1

Re: Testing a ATMEGA64A Controller

01/23/2012 2:17 PM

I would just get a 128 for $28...unless you have that much time on your hands....

http://www.atmel.com/dyn/resources/prod_documents/doc2593.pdf

http://www.futurlec.com/ATMEGA_Controller.shtml

http://www.atmel.com/dyn/resources/prod_documents/doc2467.pdf

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 All living things seek to control their own destiny....this is the purpose of life
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Jagote
Associate

Join Date: Feb 2010
Location: Birmingham, England
Posts: 44
Good Answers: 2
#2

Re: Testing a ATMEGA64A Controller

01/24/2012 3:28 AM

Swap the controller with one on a good board and see if the problem follows the controller or stays on the board.
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rimpul
Associate
India - Member - New Member

Join Date: Aug 2011
Posts: 37
#3
In reply to #2

Re: Testing a ATMEGA64A Controller

01/24/2012 7:11 AM

dear sir,

The controller is already mounted on the pcb board(soldered on the pcb board), is their any other way to test the controller.

regards

rimpul
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mjb1962853
Guru
Engineering Fields - Electrical Engineering - Analog and Digital Circuit Design Engineering Fields - Electromechanical Engineering - Transformers, Motors & Drives, EM Launchers Engineering Fields - Engineering Physics - Applied Electrical, Optical, and Mechanical

Join Date: Jan 2008
Location: NY
Posts: 1207
Good Answers: 119
#4
In reply to #3

Re: Testing a ATMEGA64A Controller

01/27/2012 12:10 AM

I've had a similar problems with PIC micros on surface mount PCBs. The integrity of connections to 10 mil pitch IC leads and 0402 parts is very difficult to judge with the naked eye. Suggest you look at the board under magnification/microscope. You may have a cold solder joint. Sometimes retouching "suspicious" looking solder joints fixes the problem. I've also found and removed solder and/or copper whisker "shorts" to fix defective boards. On most boards I've repaired, the defects only became obvious when I examined them under a 20x binocular microscope. Good luck!
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rimpul
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India - Member - New Member

Join Date: Aug 2011
Posts: 37
#5
In reply to #4

Re: Testing a ATMEGA64A Controller

01/31/2012 8:00 AM

Dear sir,

As per your suggestions i've checked the soldering in magnification but i could not see any joint in pcb board, can any one suggest the alternative method.

regards

rimpul
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